text stringlengths 83 79.5k |
|---|
H: Does this AC to DC + breadboard setup have the ability to kill/severely hurt me?
I'm currently building a PC peripheral that uses an AC to DC converter to power a set of DC fans. I'm not a trained EE or electrician, so I want to make sure I'm not putting myself a risk with this setup.
Essentially, I have the AC to ... |
H: Will reversing the polarity of a K thermocouple damage it?
I have a K thermocouple connected to a MAX31855KASA+T IC supplied by 3.3V. I mistakenly reversed the polarity and was taking reading from it for about 1hr. I am noticing the instrument is now somewhat inaccurate. Freezing water was registering 10F and bo... |
H: Which matrix index should be used when Y (admittance) is shown to compose a circuit segment mapped to an ABCD matrix? Y21? Other?
I would like to cascade a serial capacitor with a shunt inductor to form an L-match network by multipling two ABCD parameters and convert the result to S-parameters that represent the co... |
H: Mixing light from multiple leds
I'm trying to design a device that produces visible light with a somewhat controllable spectrum. My goal is to measure the human eye cone cell responses by switching between two different spectra and finding spectra that are hard to distinguish by eye, so an RGB led won't be sufficie... |
H: Is it safe to keep PS_ON grounded?
I want to disable the 'soft power off' feature of an ATX power supply. So I think of connecting PS_ON and GND with a tweezer and keep it. But when the motherboard wants to shut down and sends high level signal to PS_ON, will the current be too large and damage something?
AI: The A... |
H: What will the output voltage will look like if we have non sinusoidal AC paired with capacitor?
I am currently studying for exam and a lot of questions are popping up in my head.
What will Uout of a full wave bridge rectifier with a capacitor look like?
I am talking about square, trapezoidal, and triangular type of... |
H: Why this motor shows delta 220 / star 380 which is usually the other way round from what I know?
Brand new induction motor arrived in the factory,it comes with gearbox on top controlled by VFD, but I could not understand it's nameplate, it should have shown just delta / star without voltage number, so confusing.
A... |
H: What does the 'C' marking on this battery indicate?
As the title says, what does the 'C' marking mean? I first figured it may be the terminal that outputs temperature data but I'm not sure. I wanted to build a custom solar charger for this battery and I was hoping to know if this terminal is important in any way.
A... |
H: No output signal with ULN2803 on Proteus
I'm using an ULN2803 to amplify a voltage signal from an Arduino, but the output is 0 V even though the input is 5 V. I've tried multiple simple circuits to test it, but it just doesn't seem to work. I don't know if it's a Proteus problem or something else.
PS: I need to get... |
H: Audio: Can I use a stereo-amplifier with a mono DAC?
Here a schematics of my project:
There is only one speaker (the sound is mono)
The DAC I will use is a mono DAC, its reference is ES8311 and its datasheet is here: URL. It has two ouputs: OUTP and OUTN.
Because of component shortage, I have to use the followi... |
H: Battery high voltage protection
I'm making a coilgun with four 11.1V 1300mah 95C lipo batteries in series, providing 44.4V for the coils. Current will peak at 200A for short durations of time. Is there some common way to protect the battery, say, with a fuse, in case a coil turns on for too long? I'm a beginner at ... |
H: How can the minimal number of bits representing modulus of counter be smaller than the number of bits representing our output?
Suppose we want to have this sequence 30, 50, 1003, 30, etc... It's no hard to see that we need a MOD-3 counter because there're only 3 states. But this also means we need 2 flip flops. But... |
H: How to practically measure an input impedance?
I would like to know how I could practically measure the input impedance of the following circuit:
I update my post by adding the rest of the circuit.
This is what my circuit looks like. The aim of my test is to measure a differential input impedance 10 kohms ±10% i... |
H: Is there a power amplifier class called "bridged"?
I wanted to know what clas of amplifer the TDA7266 from STmicroelectronic is, but I couldn't understand. Its datasheet says:
The TDA7266 is a dual bridge amplifier specially designed for TV and portable radio applications.
What does "bridge" mean in this phrase?
... |
H: Why was full page bursting removed when we moved to DDR
I'm interfacing with SDRAM on an FPGA and full page bursts are a godsend for streaming data. It's seems to be much, much more handy then a fixed burst size. I know it was removed when we moved to DDR. Does anyone know why the most useful burst mode was removed... |
H: Point-to-point building of medium- frequency circuits, ground plane implementation
I build audio projects and small logic control circuits using point-to-point on perfboard (see pic of a recent build).
As you can see this allows me to select wire gauge in accordance to the currents at various parts. When the board... |
H: Negative gain value in stability of a system
Let D(z) = k, where k is a constant gain. When I want to find the range of k such that the system is stable, the range of k is included with negative value (eg -5<k<5). My question is, can the gain constant k be a negative value? If can, what will happened to the system... |
H: Big capacitor on amplifier output
I am currently making an audio amplifier and I was wondering what is the use of the capacitor C5. I think it's here to avoid having DC voltage in the speakers when switching on the amplifier but, I'm not sure. If anyone could let me know on this, that would be great.
AI: Yes, the c... |
H: Designing an audio amplifier with push-pull output stage
I'm working on a push-pull stage audio amplifier. I'd like your opinion on whether I'm on the right track with this, both theoretically and practically.
In this circuit I'll be using the following components:
Q1&Q2 TIP31C & TIP32C with LM358N op-amp (this was... |
H: Lower voltage limit of constant current driver
I am looking for a constant current driver with rather low current (100-200mA) to drive COB LEDs (approx 34V). I found several which give an output voltage range, e.g.
12 W
input: 220 Vac 50 Hz
output: 90-102 Vdc 115 mA
Will that one really not work if the load has a v... |
H: What are these white/grey stains on the back of a motherboard?
I've recently bought a used motherboard and while cleaning it, I noticed these white stains on the back side of the PCB:
I've managed to perfectly clean the front side with pure isopropyl alcohol and a soft brush, which was mostly just dusty, but I can... |
H: Correct way to label +5V and GND in KiCad
For KiCad to detect the +5V and GND parts of a schematic, I assume the power component symbols have to be attached.
How does this work when the power comes in via a terminal?
In the image below, I have had to attach additional GND and +5V symbols to the net, behind the term... |
H: UART oversampling
I've read that for UART is over sampling used to recover some kind of “clock signal”. How is that exactly done and why is that needed?
I already searched on the internet, but I didn't find any helpful information.
AI: Two devices that communicate over UART are not synchronous, so device A uses its... |
H: DC analysis of a BJT circuit with base feedback
I'm trying to analyze a bigger circuit and trying to figure out the DC voltage at the collector. I narrowed it down to this much simpler circuit, which outputs 1.379 V. I cannot seem to get the same result, so I must be doing something wrong.
I'm not sure if calling t... |
H: How can I go about understanding an electronic circuit?
I have this circuit:
My goal is to gain a qualitative understanding of what VO1 and VO2 are going to look like for different signals V3 and V4 applied.
Because you can not calculate with BJTs or electronic components in general, I would like to ask how I coul... |
H: If an IGBT's collector-emitter max voltage is 600 V, Do I need 1 kV rated capacitors on the output side?
I'm fixing this solar PV diverter (pictures attached at the bottom of this post), other than the traces it has a blown IGBT and 2 capacitors.
The datasheet for the IGBT (model FGH40T65SPD) is here:
https://www.... |
H: Capacitor that connects the base and the collector of BJT makes it hard to study multistage amplifier
I'm studying ECE and at this point in microelectronics they've taught us that when performing DC analysis on low frequencies we must short circuit the capacitors of the circuit.
In the circuit below, I've been aske... |
H: How to measure a steady state load and surge load of relay?
I am asked to test a relay and show that it is capable of handling steady state load of 0.2 A at 27.5 Vdc and 2.0 A surge load with a maximum of 10 ms at 27.5 Vdc.
How can I do this test and measurements?
The relay that used in the circuit as follow:
AI: I... |
H: Photodiode amplifier circuit for VBP104FAS sensor
I am trying to create a photodiode circuit for this sensor so that I can connect its output to a microcontroller. I am following the document: https://www.ti.com/lit/an/sboa220a/sboa220a.pdf for my design. However, I am unable to get similar plots on the AC analysis... |
H: Non linear inductor in LTspice
I am trying to construct a non linear inductor in LTspice and have a question regarding the two plots provided below. In the first image current is swept from -30A to 30A in steps. The result yields the required behavior where the initial inductance is 500uH and with 27A peak current ... |
H: Any issues wiring high power switching power supplies to 3 phase power this way?
I have to wire several high power loads to a 415 V 3 phase feed. In case it matters, this is in Singapore.
The loads have a switching power supply front end. They are rated for 277 to 480 VAC and several thousand Watts. I have live, ... |
H: Lattice MachXO3 - what's "HW Default Mode"?
What's the meaning of the "HW Default Mode" for a Lattice MachXO3 device? I've seen this term come up a few times in the configuration guide but there is no clear definition of it. Does this refer to erased/blank devices?
AI: Note:
To 'Check Device ID' over the I2C config... |
H: Is the reference voltage for voltage control the RMS between the three phase voltages?
Suppose to provide voltage control with an AVR connected to a synchronous generator. A voltage reference is compared with the output terminal voltage of the generator, and the error between them is sent to a controller.
My doubt ... |
H: A capacitor charge time - two methods two different answers
I am a bit puzzled and ask for your help about the following:
A theoretical capacitor of 100 F is being charged with a constant power source of values V = 50V, I = 50A, ESR of capacitor = 5 mohm
To calculate the time to charge the cap:
Approach 1: [Calcula... |
H: Output level of LM311 comparator
I am simulating the circuit above in LT Spice, where a LM311 (a LT1011 is simulated, but should be largely equivalent) is used to transform a (noisy) sine wave signal into a square wave. Value of R5 controls hysteresis as seen in red waveform.
I understand that the comparator has a... |
H: Mosfet Relay Gate Drive
Recently I ran into a part called a MOSFET Relay to address a design problem,
On paper, this part seems ok to use for my design but looking at the internal circuit I don't see any charge pump that drives the FET's gate. The Gate looks to be driven by photodiode dome array (PDA). Can this pa... |
H: Bias voltage higher than input voltage
Can someone explain why the voltage on the Bias pin should be higher than the input voltage n this LDO?
What is the reason behind it?
Why is the bias voltage on different pin? For what purpose? How can it have overlapping voltage ranges with the input voltage?
AI: The MIC47050... |
H: How many optocoupler outputs can I stack in series?
I have 44 devices - each which provides a 5V output when active and operating correctly and 0V when not.
On my microprocessor, I need to check if all 44 are active or not (don't need to know if individual devices are active or not, but just to know that all are ac... |
H: Pi-matching impedance calculation for LoRa 868Mhz RFM95
I'm not an expert in RF, but I'm interested in understanding how to calculate an RF matching circuit for my RFM95W 868M LoRa node that indicates pin ANT terminated in a matched 50 ohm impedance matching.
At the output of the matching circuit, I want to connect... |
H: Why don't most electrons hit the anode in a cathode ray tube or electron gun?
In a cathode ray tube or electron gun, electrons liberated from the cathode by thermal emission accelerate towards a ring-shaped anode, from the potential difference between cathode and anode.
If an electron is slightly off-centre, so nea... |
H: Can I short VBUS and GND in a 6-circuit USB-C receptacle?
In search for a USB-C receptacle just to source power from my MacBook Pro's USB-C port for my PCB with no need for data transfer, I found this Molex 6-circuit USB-C receptacle which seems to offer just what I need and is also easier to solder by hand.
I unde... |
H: TLC5946 no output when BLANK is LOW
I'm testing the TLC5946 LED driver and I'm trying to bitbang into it's registers with this bit of code:
void bitbang(bool high, uint8_t bits) {
digitalWrite(LED_DAT, high ? HIGH : LOW);
delayMicroseconds(5);
for(uint16_t i = 0; i < bits; i++) {
digitalWrite(LED_SCK, ... |
H: LTspice: conditions values measurement in error log automatically
I am trying to measure automatically values according to another value on the schematic (.meas values in the log error).
Here you can see what I would like :
In this case I want in the spice error log:
When V1(Vs_aop)>15V,
read I1(Rsh)=5.927A,
save ... |
H: Generate 10MHz clock in Artix-7 FPGA series
This is a question from a FPGA newbie. I have a simple Verilog for a counter and I would like to generate a clock for it.
Can I generate a 10MHz clock in FPGA without an external clock source?
How can generate it?
PLL/MMCM seems to work just with external clock sources.
T... |
H: Small signal model of current mirror
I'm trying to analyze the small signal model of this following snippet circuit (all the transistors are the same with beta = 100, and VA =100:
What i've come up with is:
simulate this circuit – Schematic created using CircuitLab
when the rest of the circuit is located 'above' ... |
H: Voltage divider, linear regulator, other options to power proportional HV DC-DC converter?
I have a EMCO AG15P-5 DC-DC converter (datasheet) that takes 0-5V in and outputs up to 1.5kV (proportional to input voltage). I need to operate the converter at 500V output. I've done testing with a precision voltage source a... |
H: Can I multiplex only VTREF for multiple SWD programmations?
We would like to program several (6) PCB successively, each one working with a Nordic nRF52 µC. The idea is to have only one J-Link with the SWD lines (SWDIO, SWCLK and VTREF) common to my six boards.
I have seen some people multiplexing SWDIO, SWCLK and V... |
H: OpAmp filter drive capabilities
My application requires a high input impedance. Therefore I am using 2 x TLV313 OpAmps as unity-gain buffers for my ADS1296. They also provide an adequate common-mode output voltage (2.5 V) for my ADC. My signal of interest is 0 - 10 kHz. The ADCs modulator frequency (as I understand... |
H: How do you bandlimit a continuous-time signal?
I wish to avoid aliasing as a result of taking the FFT of a signal. The signal isn't band limited. My understanding is that I should band limit the continuous-time signal first. How do I do this?
EDIT:
I am simulating a continuous time signal of the form \$s(t) = \sum_... |
H: Is this a correct FSM graph?
This question is sourced from H. Roth's book 'Fundamentals of Logic Design.' It pertains to a sequential circuit featuring a single input (X) and one output (Z). The circuit's function entails examining sets of four consecutive inputs, with the output Z being equal to 1 when the input s... |
H: How to choose a phototransistor or photodiode?
I've found a photoresistor (yes, resistor, probably 30 years
old) in my scrap box, attached it to an ATtiny as ambient light
sensor, with a 100kΩ resistor as voltage divider towards +5V.
On power on, the ATtiny measures the ambient light using its ADC
capability, and u... |
H: Designing a second order HPF with a high gain common-source
I have a High gain (A = 22k) Common-Source circuit, and I was wondering If I can make a second order HPF like this circuit:
My circuit is just an NMOS with an input at the gate, output at the Drain, and I'm assuming it has 22k gain, (So approximately infi... |
H: How can I find what the sample rate is if I measure it continuously for 100 times?
I am using Adafruit ItsyBitsy, and an external ADS1115 ADC module.
I am continuously measuring the voltage using ADS1115 via loop 100 times.
for i in range(0, 100):
analog_in = chan.voltage
analogfinal += analog_in
How... |
H: Negative resistance - crystal
Why do we have the negative resistance concept in a crystal?
How does the crystal exhibit negative resistance?
I've read this Link and it seems to say that the amplifier is the one that causes the negative resistance due to positive feedback? Am I understanding it correctly?
AI: Why do... |
H: Closed Loop Transfer Function For Negative Feedback Circuit
I have the following circuit diagram
I understand the open loop circuit (H1H2H3H4) and I also understand the negative feedbacks H1H2H6 , H3H4H5 and H2H3H7, but I can't figure it out why the positive feedback H1H2H3H4H5H6 takes part in the closed loop re... |
H: Can I power my microcontroller system directly from a 3V lithium coincell (transient consideration)?
My device has to be powered with user replaceable 2032 coincell.
I have a ~3.3V microcontroller like nrf52832. Its datasheet says:
So lithium coincell voltage range (3.3V - 0V) is in operating conditions (microcon... |
H: Transistor C114 markings
What are the letters below the marking C114 on the package of the transistors?
For example one can find
\$E.SB, \quad E.S\bar C, \quad T.S\bar B\$
Are those transistors all equivalent?
Is this type of marking standard among other components? Any advice on where to gather information on th... |
H: How to print uvm_tlm_analysis_fifo properties with `uvm_info() in UVM?
I'm stuck on the print properties of uvm_tlm_analysis_fifo handle with `uvm_info().
I made a simple sequence item as below.
class simple_sequence_item extends uvm_sequence_item;
rand bit[9:0] address;
rand bit... |
H: Unexpected impedance spike when paralleling capacitors
I was watching a video from EEVBLOG about bypass capacitors, and he presented a theory that randomly connecting different values of capacitors in parallel can create unexpected impedance spikes:
To inspect the picture, right click and open in new tab, the scal... |
H: Why does this JFET buffer perform so poorly at 82 MHz?
I made a Colpitts oscillator that worked well first time. Frequency about 82 MHz.
(nb. corrected diagram adding ground between series 68 pFcaps and corrected Vout)
I wanted to add a buffer and chose to use a JFET 2N3819 from the circuit described in the excel... |
H: Reading OpAmp Open-Loop Gain vs Temperature Graph
From the OPA140 datasheet here: https://www.ti.com/lit/gpn/opa2140
How do you read this graph? Because on the Y-axis the units are all weird and the numbers are strangely negative.
The open loop gain is listed as:
AI: Looks like they’re stating it as the reciprocal... |
H: Trying to ID these FinFETs
I'm trying to ID this FET, but can't seem to find anything.
The logo looks like "FCE"
It says B6066 M300AM
How can I ID these guys in the future?
AI: They are Huashuo Semiconductor HSBB6066 n-channel MOSFETs. |
H: 4 input multiplexer in VHDL
I am trying to model a 4 input multiplexer using VHDL; I am using edaplayground.com. I am trying to do this using a 2 input multiplexer. The code for only the 2 input multiplexer works, but when I try the 4 input multiplexer I get a lot of errors. This example is almost exactly what is i... |
H: Can anybody explain these examples?
I am just getting started with electronics coming from a web dev background so this is a beginner question.
I am following this tutorial and I'm confused about this part! The paragraph under step 4 has me very confused so I have a few questions:
Sentence that confuses me: 10 ti... |
H: How to analyze this RC circuit without finding Thévenin's equivalent circuit?
simulate this circuit – Schematic created using CircuitLab
I want to find the capacitor's voltage equation in this circuit (\$v_{C}\$) knowing that the capacitor is initially uncharged. I know that analyzing the Thévenin equivalent for t... |
H: Could a CPU execute the fetch-execute cycle without a microsequencer/microcode?
VERY SPECIFIC QUESTION, PLEASE READ THROUGH ALL OF IT
From wikipedia:
"The sequence of operations that the control unit goes through to process an instruction is in itself like a short computer program, and indeed, in some more complex ... |
H: Unconventional use of a JFET: Potential pitfalls?
The idea is to (almost) replicate the soft power button on a modern PC, using an ATX power supply and some GPIO's from a microcontroller that's going to be there anyway:
simulate this circuit – Schematic created using CircuitLab
With power off, the gates of both t... |
H: Feedback loop gain not as expected in a differential amplifier
I am trying to build an approximate opamp with a differential amplifier and add a feedback loop to get the approximate wanted gain.
I used a differential amplifier with a current source and a current mirror, and got open loop gain of 3k.
When I add the ... |
H: IC current sensor functionality
I'm trying to understand the VOC and FAULTB pins of this IC sensor(MCR1101-20-5).
As far as I understand, this sensor can measure -20A to +20A DC current and for the model I have the transfer function is given as:
Vout = VCC/2 + Iin x 100mV/A x VCC/5V
In my case Vcc = 5V so
Vout = 2.... |
H: Can I double the circuit on the same PCBDoc using Altium Designer?
Can I double the number of components for a PCB while having a single schematic in Altium Designer? I want to make a two same circuit on the same board.
Or should I recreate the same schematic to double the number of component for PCB?
AI: You can u... |
H: Soldering iron stands
A lot of soldering iron stands have the metal shaft of the soldering iron in contact with a metal part of the stand. Is this desirable, or should it be avoided?
I've had a couple of those stands with the chrome plated springy spiral that surrounds the shaft. Some designs are made of plate me... |
H: How to choose the RC values between a buffer and an ADC input?
In the OPA365 specification sheet there is this example circuit where they add a RC filter between a unity buffer and input of an ADC. My understanding of the purpose of this \$ 100 \,\Omega - 1\operatorname{nF} \$ RC filter is to anti-alias the signa... |
H: ETSI standard for 433 MHz
I am really confused about ETSI standards for SRD. I need some ETSI standard which regulates frequency band 433 MHz (433,050 MHz to 434,790 MHz).
I found ETSI EN 300 220-1 V3.1.1 (2017-02) - it seems like the latest, but there I can not find any information about maximal TX power and band... |
H: Concatenating first-order high-pass filters
I have the following circuit, which is an active high-pass filter with the knee frequency \$ f_{-3 dB} = \frac{1}{2\pi RC} = \text{1 kHz}\$
I wanted to concatenate two of those systems in order to make a second-order HPF:
simulate this circuit – Schematic created using ... |
H: Can't find the Pspice model for a diode
Last time I had an issue I posted a question and the answer was pretty useful, so it's the time to try to find the answer to a new one.
I don't seem to be able to find the Pspice model for the following diode: DSA120C150QB. I have searched in the two manufacturers page and al... |
H: Transistor Not Entering in Cutoff region
I have constructed these circuits, utilizing either DTL or TTL logic, and I'm aiming to place transistors T1, T2, and T3 into the cutoff region. However, I'm currently unable to achieve this. Could you please advise me on which parameter I should modify to ensure these trans... |
H: How to implement the design of a bidirectional buck-boost converter?
I need your help in designing a bidirectional buck boost converter with the following requirements:
Input voltage: 100V-400V
Voltage range: 250V-1.2kV
Output current: 40-80A
Power dissipation of 24 kW.
Switching frequency: 20kHz
I did some desig... |
H: Connecting Arduino to Keithley external trigger
I need to connect digital output pin of Arduino Uno to Keithley DAQ6510 digital multimeter external trigger input. Both are utilizing 5V TTL logic.
Now when I measure the voltage on external trigger input of DMM, I see 5V. So I assume there is some pull up resistor in... |
H: Boost converter inductor calculation
I am designing a boost converter with the following parameters:
Vin: 3.0 - 3.7 V
Vout: 30 V (nominal)
Iout(max): 10 mA
Fsw: 600 kHz
TI's application note has the following equations for boost converter inductor selection:
When I plug my numbers into the equation, I get a very... |
H: Can I make a homemade Peltier module with constantan wire?
I'm trying to make my own Peltier module.
I ordered constantan wire, which I used as N-type semiconductor and iron wire as P-type.
I made this and powered it with 3V, but without response.
What am I doing wrong?
AI: Iron and constantan make a good measurem... |
H: Is it possible to build radar system for drones detection at home?
Can I build DIY radar system using ESP32 or Raspberry Pi modules + a bit of soldering that will be able to detect drones in a radius 1-2km? Is it possible? What do I need for this and how much will it cost?
I need a system which will be able to dete... |
H: How is it possible for GreatScott to use this MOSFET driver if it can only give 1.5 amps max?
I am trying to follow this tutorial by Greatscott.
I don't understand how the TC4427 MOSFET driver he is using in this build works. I searched up the datasheet which can be found here. It says "High Peak Output Current: 1.... |
H: Why is the voltage drop being used to calculate the current?
I need some more help with explaining an example. I'm having trouble understanding this part of a tutorial, and my question is fairly simple. Why use the voltage drop rather than the battery voltage to calculate the current? Or anything else for that matt... |
H: How do you choose the correct MOSFET for your project?
I am building an electric longboard. I am replicating this exact ESC circuit by GreatScott. The amount of voltage and current that will be going through my MOSFET's are 36V Max and 80A Max.
I need 3 N-channel MOSFETS and 3 P-channel MOSFETS. The N channel MOSFE... |
H: What does this symbol from a voltage regulator schematic, looking like a capacitor connected with with diagonal lines, mean?
What does this schematic symbol mean?
It is taken from the LM78XX datasheet (figure 17, page 22.)
AI: According to Wikipedia, it's an obsolete symbol for a capacitor with polarity indicator. |
H: Transient Simulation - ADS
I'm facing a doubt in transient simulation in ADS.
In many setups I've seen placing a resistor in series to the transient voltage step generator. Placing the series resistor, and simulating the below circuit, I obtain the plots which follow.
My goal is to simulate just the reflection be... |
H: Estimating PCB Trace Delays
In the context of FPGA design, I sometimes need to estimate PCB trace delays between the FPGA and external devices to properly constrain the input/output timing. As those do not need to be accurate to the picosecond, I'm looking for generally accepted rules of the thumb rather than exact... |
H: Can we use an integrator circuit as a Hilbert transformer?
I want to know about the hardware implementation of Hilbert transform. Can an integrator circuit be used to introduce a -90° phase shift to the input signal?
AI: Phase shift? Sure. That's the easy part.
Or flat amplitude response. Trivial.
How do you do bo... |
H: NE5532 spice model on Pspice for ti
I've installed PSpice for TI but I can't find NE5532 model on it? I'm searching for it's spice model to being able to simulate it on LTSPICE. (I wonder if TI does not included it's devices model in their Pspice, what this massive garbage application is included!)
AI: To add the N... |
H: What specifically causes damage when a transformer-coupled valve amplifier has no load across the secondary coil?
I'm new to this forum, so be gentle! I'm an electronics and computer systems engineering student, and I always thoroughly enjoy audio circuits, especially examining older valve based designs (I play gui... |
H: In I2C communication, let's assume 10 bytes are to be transferred from Master to slave. What happens if NACK is received after transfer of 5 bytes?
Is only erroneous byte sent again and communication resumes or communication is restarted? Similarly, what will happen if data is being received by master?
AI: Accordin... |
H: How does my fan have active tacho (RPM) output even though the blades aren't turning?
Whilst working on a project to control and monitor an EC fan from a Raspberry Pi, I have encountered an anomaly that has me completely confused; the fan is still outputting pulses on the tacho line proportional to the input power ... |
H: Wien-Bridge Oscillator
First question - Why does the Barkhausen Criterion state the total phase shift from input to output and back to input have to be zero? I thought the loop gain phase shift was supposed to be -180 for oscillations to be sustained?
Second question - what exactly is the 'input' here? It's an os... |
H: How to apply two NOT gates sequentially in VHDL?
I have one signal:
signal 1 : std_logic := '0';
I want this signal to go through two sequential NOT gates:
signal 2 : std_logic := not(not(1));
Two NOT gates will be automatically converted to nothing, but I need two NOT gates to add some signal delay.
It will work ... |
H: Resonance vs Undamped response
Why does this book say that resonance only occurs in an RLC circuit?
If I have a two pole complex conjugagte system where the damping factor is low, there will be a resonant peak in the frequency response of that system, it is not necessary that there is a cap AND an inductor present... |
H: Problem with the output of the engine control signal
Program to control three DC motor levels and display speed (RPM) on a 7-segment LED using 8051. Use external interrupt 0 to read pulse from encoder. When compiling on keil C there is no error, but simulation on proteus cannot output control signal from pin P2.5. ... |
H: Intuitive understanding of relation between phase margin and peak overshoot and/or damping factor
Second, percent overshoot is reduced by increasing the phase margin, and the speed of the response is increased by increasing the bandwidth.
"Control Systems Engineering, Norman S. Nise"
The mathematical proof of thi... |
H: What will be the equivalent resistance in this situation?
We have to find the equivalent resistance between A and B.
My attempt:
Let's simplify the circuit.
simulate this circuit – Schematic created using CircuitLab
Now,
$$\frac{1}{R_P}=\frac{1}{5+5}+\frac{1}{5+5}+\frac{1}{5}$$
$$R_P=\frac{5}{2}\Omega$$
However, ... |
H: Op-Amp complex impedance
I am having some trouble understanding the background of this question.
I think they are saying that as you sweep the frequency of Vin, the impedance Zin seen will be different as you pass through the different pole location. For example, at DC, impedance should be purely resistive? Capaci... |
H: Mixing current in Gilbert cell
I'm currently breaking my head over this Gilbert cell:
I understand the workings of this circuit, that is not the issue I'm having.
What I do not understand is, when looking at the current waveforms:
How do you get this resulting output? I understand it all the way to where the red ... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.