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Questions tagged [pulse]

A pulse in signal processing is a rapid, transient change in the amplitude of a signal from a baseline value to a higher or lower value, followed by a rapid return to the baseline value. There are many examples of a pulse function including: Step/rectangular pulse, impulse/dirac pulse, triangular pulse, sawtooth pulse, sinc pulse, Gaussian pulse, etc.

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2 answers
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Collector and Emitter of BJT are always shorted [closed]

I am testing a circuit and i have an npn BJT in that. I am supplying a 5V pulsed source to the base of the BJT at node C. And a constant -5V input at node A. Note the frequency must be 10KHz with 10% ...
Sahasra Vaiishnavi's user avatar
1 vote
2 answers
50 views

function generator outputs - difference between 50 ohm and 600 ohm

I am trying to use a PCI-Quad04 board to count pulses (from a rotary encoder). In order to test out counting, I have a 1000Hz square-wave signal from a signal generator (BK Precision, 3011B) as ...
RealNovice's user avatar
0 votes
0 answers
32 views

Double pulse testing the first transients on the current

I would like to comprehend what represents the first pulse on the ID current of the LS and HS in double pulse test configuration. I have the circuitry as shown: LS is my active switch, when I turn ...
Kurt Müller's user avatar
3 votes
5 answers
583 views

Level shift a 0-20 V pulse to +,-10 V without deteriorating the rise time

I need a fast +,-10 V pulse. I thought I could trigger the base of a switching transistor with my fast rise time digital I/O and get a 0-20 V at the collector and then shift the DC to 0 volt and have ...
Fateme's user avatar
  • 338
0 votes
2 answers
59 views

3 Phase Pulse Generator

I cobbled together a simple 3 phase pulse generator for a project I am working on. I've attached a picture of the circuit. I need to get a quick (~50ns) pulse on each phase. I have concerns about the ...
Brian's user avatar
  • 175
0 votes
1 answer
43 views

Relay to read only pulse signal not constant signal

I am trying to find or create a relay that provides power when there is a 12v pulse signal that last less than 1-2 seconds but if it receives signal longer than 1-2 seconds then it should stop or not ...
BonezMedia's user avatar
0 votes
1 answer
42 views

IC 4017 output modification to pulse when released button?

Normally working with 3 output LED, when press button in first time LED1 on LED2 and LED3 off then released button in first time LED1 still on LED2 and LED3 still off. When press button in secend ...
robert's user avatar
  • 1
4 votes
2 answers
770 views

Convert 0-12V AC signal to 3.3V binary pulses

I want to digitize the signal from an analogue anemometer (windspeed meter), so I can log with a Raspberry Pi etc. The anemometer outputs an AC signal, where both the frequency and amplitude are a ...
Jake Reich's user avatar
0 votes
2 answers
114 views

Double pulse generation

I want to generate a double pulse with an initial delay of 50us (initial delay is power-up delay time for the gate driver IC.) The first pulse should be of 1.2 micro seconds and then off for 0.7 ...
Andr7's user avatar
  • 265
2 votes
0 answers
60 views

What is the formula for maximum battery pulse vs pulse duration?

I am interested in finding the maximum current a lithium-ion battery can provide for pulses in the order of 50 ms. If my battery can provide 50 A continuously and 120 A for 10 seconds, how can I find, ...
Greg Sorter's user avatar
0 votes
1 answer
109 views

Sawtooth peak detector

I am trying to create a circuit for converting a variable frequency clock signal (with unknown duty cycle) to a pulse wave with an adjustable frequency-independent duty cycle. My approach is to create ...
kalj's user avatar
  • 101
4 votes
2 answers
431 views

How can I drive an LC tank with a transistor?

I've been exploring the idea of making an induction heater. Mostly I see people using the ZVS circuit to do it, but I would like to get an understanding as to how you would do it if you had an ADC and ...
TrisT's user avatar
  • 355
3 votes
1 answer
82 views

How do I configure a negative clamper in LTspice?

I am trying to make a negative clamper in LTspice. The pulse source goes from 10V to -10V harmonically. My aim is to lower it's voltage by 7.3V, so it will have a pulse graph going from 2.7 to -17.3V, ...
Pascal's user avatar
  • 43
2 votes
2 answers
221 views

How can I generate square pulses of the format shown in picture? The positive part should have smaller time scale

How can I generate pulses of this format? I need to generate a single pulse of 20V as a trigger pulse for performing a microscopy experiment( I couldn't manage to get a programmable function generator ...
Gan's user avatar
  • 31
0 votes
4 answers
84 views

Estimating current pulse amplitude from some known parameters

How to estimate the current pulse amplitude, if we know the pulse period Tp(1us), pulse duration tp(0.5ns) the resistor value R1(330 Ohm) and the settled value of voltage value which is 132mV? In my ...
user4444's user avatar
  • 317
1 vote
1 answer
94 views

Confusion in pulse transformer specification

I am having hard time to understand specification of this particular datasheet. https://www.mouser.ca/datasheet/2/54/hctsm8-3217781.pdf I am using HCTSM80101AAL. My first question is about volt-...
igor's user avatar
  • 25
0 votes
2 answers
147 views

Turn TTL high output signal into ground pulse for EEPROM write

I have a TTL-high output signal which I wish to use to send a negative pulse to a 28c256 EEPROM WE pin to write to it, but the high line may remain high until the next clock signal/output change etc. ...
Hektor's user avatar
  • 165
-2 votes
2 answers
193 views

Impulse response ltspice

Is any one able to explain why I am not getting an impulse response when I probe across L1? The voltage shown seems to be the same no matter where I probe on the circuit.
confusionpersonified's user avatar
1 vote
4 answers
174 views

Reducing the fall-time of a P-channel MOSFET

I have implemented the following circuit in hardware. My required output across load (R7) is a pulsed signal of 20 V, 100 kHz, 10% duty cycle (10 us pulse width and ON-time of 1us and OFF-time of 9 us)...
Sahasra Vaiishnavi's user avatar
1 vote
2 answers
80 views

Voltage/Current ratings for dual SCR modules

I'm working with a different kind of package of SCR than what I'm used to, where there are two SCR's in one package. So the Datasheet for this SCR-module only has one rating for voltage and current, ...
zmcginty's user avatar
0 votes
2 answers
103 views

Single pulse generator

For my 10V model train's signals and switches I need a ~500msec power pulse (AC; low Amp). I already have an electronic switch that provides power when triggered. However, the power should be brief, ...
Ben van der Pluijm's user avatar
2 votes
2 answers
257 views

The input to the gate of an N-channel MOSFET is a pulsed signal but I am getting a ramp signal

I am trying to generate an output voltage of minimum 30V and maximum 50V, current of minimum 10A for a load of 2-10ohms using a MOSFET. I am connecting an NPN transistor's collector to the gate of the ...
Sahasra Vaiishnavi's user avatar
2 votes
0 answers
98 views

Understanding inductance and its dependency with frequency

I am trying to understand how to design an inductor that has constant parameters over a wide range of frequencies. Especially over high frequencies because I want to use them for impulse testing ...
Santi Ospina's user avatar
2 votes
2 answers
138 views

How to design a simple amplifier for a DC "pulse" signal?

I need to generate a "pulse" signal with a specific slew rate, period, on, and off time. I can generate any signal I need using a benchtop arbitrary function generator, however, I need to ...
Patrick Wright's user avatar
0 votes
0 answers
44 views

voltage dividers on inputs to current/power monitor ic

I want to measure the current and voltage of exponential decay pulses delivered to resistive loads. The pulse peak voltages are between 20V and 400V and the time constants are between 1ms and 20ms. I ...
WRG's user avatar
  • 66
1 vote
2 answers
52 views

Low power low speed pulse divider?

I have a digital input which receives irregular pulses. I want a circuit that takes that input and generates an output pulse for every 100 (or so) input pulse. The expected input speed is 10-300 Hz. I ...
Alexander Ohm's user avatar
0 votes
1 answer
72 views

IGBT pulse max current

If in datasheet it reads that an IGBT can handle a 1200A current pulse for 1ms, and can operate at 500A max at 25C and 320 at 90C, how would I calculate what kind of pulse can it handle for 2 or 3 ms? ...
Nyxeria's user avatar
  • 105
0 votes
1 answer
83 views

Analog circuit for obtaining a phase shift of 1-2 s in an arterial pulse wave signal of period 1-2 Hz

I am trying to design an analog circuit using an operational amplifier to introduce a phase lag of the order of 1-2 seconds in an arterial pulse wave signal (photoplethysmogram or PPG for short) that ...
Saif's user avatar
  • 1
1 vote
1 answer
72 views

Improving voltage follower circuit for high voltage pulse

What I’m doing: I have some unknown resistive loads that I want to apply an exponential decay pulse to. Regardless of the resistance of the load, I want to be able to specify the pulse peak voltage ...
WRG's user avatar
  • 66
0 votes
1 answer
180 views

RC circuit for EDM machine pulsing backwards

I am building a hackaday EDM machine project. Same as picture attached minus the 3D printer board and with a 120 V, 9 Ω setup instead. I measured my voltages with a multimeter and across my electrodes ...
Mike Kioul MikeKioulepoglou's user avatar
2 votes
1 answer
267 views

Pulse generator ll - Art of Electronics

How does Q3 hold Q1 at ground? I understand the operation of the pulse generator, I just don't get how q3 holds the collector of q1 at ground.
David Ab's user avatar
  • 129
0 votes
1 answer
94 views

How to generate a single pulse circuit without using any MCU? [duplicate]

I have a 5V supply to turn my circuit on, and i need a one pulse circuit. The condition should be look like this; When the circuit energized with 5 V it should go low after t1 time and it should stay ...
Ufuk Özgür's user avatar
0 votes
1 answer
110 views

Dual Edge Detector without using IC

I tried to simulate (before building it) a double edge detector circuit that I found in this post. When I simulated it, I got a decent pulse when I closed the switch but when I opened it, I got a ...
CBal's user avatar
  • 13
0 votes
0 answers
44 views

Receiving Timestamps from PPS using uBLOX MAX M8C-0 GPS Receiver

I am having problems with sending and receiving the messages. I am using the SDA and SCL lines. My goal it to try to use the PPS to get under 5 millisecond accuracy for timestamp purposes. Could ...
jmoffett's user avatar
0 votes
0 answers
43 views

What circuit allows me to drive positive kV level pulses to antennas and over spark gaps to earth ground?

Ideally I would like 0-6kV pulses with adjustable frequency, but I could settle for 4kV and 40kHz. Pulses should be sharp as possible. Someone suggested a PWM module with a mosfet inside and to drive ...
wellumies's user avatar
1 vote
6 answers
227 views

Problem generating two asymmetrical pulse waves

I am trying to generate two pulse waveforms with a on to off time ratio of around 40/60. The max amplitude is only 5 V however the switching frequency is quite high at around 100 kHz. The two ...
SimonPCB's user avatar
0 votes
0 answers
123 views

How are PCM signals put onto a wire?

I just want to get a sense of how digital data is physically transmitted over cables using protocols like USB or Ethernet. I've read that they use PAM signaling (USB4 uses PAM-3, Gigabit Ethernet uses ...
shafe's user avatar
  • 343
0 votes
2 answers
165 views

Rising and Falling edge pulse alternative

I have a requirement to generate a 4 sec pulse when a switch is closed and another pulse when the switch is open with minimal (<10uA) to zero power consumption when the pulses are not being ...
Planestoner's user avatar
0 votes
0 answers
62 views

Reliable fail-safe optoisolator

I would like to add an extra fail-safe to a optocoupler. My current approach is to transmit a pulse of very specific frequency and pulsewidth on a clock on the high voltage side through the ...
user338269's user avatar
1 vote
0 answers
51 views

Chirp pulse compression as described in Stimson's book

I reference the below diagram, from Stimson's Airborne Radar, 2nd Ed. In the text he discusses how the frequency increases linearly throughout the duration of tau. The sketch of the frequency x time ...
fpd011's user avatar
  • 23
1 vote
1 answer
94 views

Needing some EPROM breadboard help!

I'm currently trying to make an EPROM programmer on my breadboard capable of programming a single address at a time. Nothing fancy for writing large programs, just trying to learn some basics. Right ...
Andrew Albritton's user avatar
2 votes
1 answer
95 views

Pulse signal conditioning with a LM311

I am trying to design a sensor to read the pulses on my electricity meter. The meter has 1 LED that gives 1000 pulses / KWh. Each pulse is 30ms in width. I am using a phototransistor and a LM311 to ...
Dan Corneanu's user avatar
0 votes
1 answer
78 views

Identify types of circuit(s) that would function as stated

I am trying to build a circuit that will have a trigger input, a clock input and an output that is (10) pulses at clock frequency for each trigger pulse. Would it be multiple circuits (chips) or just ...
bteddy1's user avatar
1 vote
1 answer
60 views

Measure time between trigger events

I want to measure the arrival time of three seperate digital pulses with respect to a global trigger. The longest arrival time is expected to be <10ms and it would need to be able to determine the ...
Flemingjp's user avatar
1 vote
1 answer
67 views

Duty Cycle and Filtering in Switching Power Supplies

I have a few confusions to clear up. The first one is about the switching power supply. Does the power supply simply work on the bases of the duty cycle? Like If I have a pulsating signal of 50% duty ...
kam1212's user avatar
  • 595
1 vote
0 answers
272 views

Vary duty cycle in PULSE in LTSpice

In a simulation using LTSpice, I would like to sweep the on-time (duty cycle) of a pulsed voltage produced using the "PULSE" waveform. I am able to run separate simulations using ".step&...
user52366's user avatar
  • 121
0 votes
1 answer
142 views

How to get rid of glitch?

I have designed simple P-channel MOSFET circuit. It works well, but when low source power is applied (1 V), a glitch occurs in the output signal. I tried R, L and C component, but it didn't work. What ...
aAa's user avatar
  • 11
0 votes
2 answers
349 views

Create TTL pulse with button press

Is there any way to get a 5V TTL signal (pulse of whatever duration, could even be a boxcar) from a button press with a very simple circuit or with some consumer device? I need this to do some ...
TheChymera's user avatar
5 votes
1 answer
302 views

How do I make this LFSR circuit generate random events every time the power is turned on?

I can't make this circuit work as expected and generate random events every time I turn on the power. I have checked NAND gates (IC3B, IC3C) and they generating clock signal with no problem. The only ...
Jerzy Przezdziecki's user avatar
2 votes
4 answers
1k views

What does the RMS value of a DC current waveform represent?

I understand (or at least think I understand) the math and calculation of RMS values and that it generally is used for representing equivalent power of non-DC circuits, like typical sinusoidal AC ...
j33205's user avatar
  • 41

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