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.

Filter by
Sorted by
Tagged with
0 votes
1 answer
30 views

Recommended modelling software for 200 μs pulse width pulse transformer application

I am looking to model a HV pulse generator that involves discharging a 6 μF capacitor at about 300 V across the primary coil of a transformer. This discharge happens about once every 1.5 seconds. The ...
user avatar
5 votes
3 answers
261 views

Diode reverse recovery time and the speed (snap back) in which recovery takes place

I'm looking at generating a circa 1 nano second current pulse by utilizing the snap-back time (usually measured in the tens of pico seconds) when a diode is "forcibly" reverse polarized ...
user avatar
  • 384k
0 votes
1 answer
44 views

MOSFET Driver input frequency

Can I send pulse 1us (1Mhz) to VOD3120AB Mosfet Driver?
user avatar
  • 107
0 votes
2 answers
112 views

Turn signal detector

I'm trying to figure out the simplest design possible. I want a video camera to activate on my truck when I activate either left or right turn signal. Each side mirror has its own camera. So basically ...
user avatar
0 votes
2 answers
77 views

Logic analyzer gives me much more pulses than expected

Let me start the question by saying that I am using a logic analyzer for the first time, so I am probably doing something wrong. I sniffed the signal that goes to a speaker. The signal is probably PWM....
user avatar
0 votes
2 answers
70 views

Peak/envelope detector circuit for 30 MHz sine pulses with a 10 kHz PRF

My goal is to input 30MHz sine pulses, with a pulse width of 10us and gap of 90us between the pulses. The circuit should convert this pulse train to a TTL signal that goes from 0 to 5 volts. To ...
user avatar
  • 1
0 votes
1 answer
124 views

Square wave distortion on low frequencies

I have this old Soviet low frequency sine and square pulse generator "G3-36A". I ran into an interesting problem. When I try to generate square pulse under 100Hz I get a distorted wave. ...
user avatar
0 votes
1 answer
71 views

I designing a pulse generation circuit using capacitor and resistor but my output is not coming as expected

I am designing a pulse circuit which I will be feeding to a comparator. I am using a combination of resistor capacitor and diode for generating positive edge triggered pulse as shown in the below ...
user avatar
1 vote
2 answers
73 views

Convert a continuous voltage to a pulsed voltage

I have a continuous 5V voltage which I would like to switch ON/OFF at a certain frequency. The output should be between 2V - 5V, and the minimum duration between ON/OFF should be 1 ms. The control ...
user avatar
  • 11
0 votes
0 answers
97 views

How to avoid CPU usage 100% while reading turning direction from an encoder?

I'm trying to read the turning direction from a handheld pulse encoder handwheel. The below code works but it use 100% CPU. I tried to use sleep in the while loop, but even a 0.01s sleep will lead to ...
user avatar
0 votes
0 answers
35 views

Is this output signal good to drive a thyristor gate?

I have the following signals: Blue is the input to the 10ohm resistor connected to the gate of the 2N7000 transistor Yellow is the output of the pulse transformer GG3 and K3 Is the output of the pulse ...
user avatar
1 vote
1 answer
122 views

How to add unit function u(t) - u(t-2) as voltage source in LTSpice?

As far as I know, we put the unit function as PULSE in LTSpice. If we have b.u(t) where b is a non zero integer, then we can put it in Von. But what if the function is u(t)-u(t-2)? And what if we want ...
user avatar
  • 21
0 votes
1 answer
94 views

Add DC component to signal

I want to add a DC component to a pulsed signal to prevent it from taking negative values. For this, I connect the pulse signal to a capacitor and a voltage divider. With the capacitor we eliminate ...
user avatar
0 votes
0 answers
43 views

STM32L0 Pulse Counting in Stop mode

I am reading that the STM32L0 supports async pulse counting in sleep mode. However, I can't find any documentation on how to actually do this. I am wondering if anyone here has attempted this or knows ...
user avatar
  • 117
4 votes
3 answers
692 views

Can a pulsating signal in which the direction of the current may not reverse radiate from an antenna?

Normally an antenna uses a sinusoidal wave whose positive half-period corresponds with positive direction of the current and vice versa. A pulsating signal/current is a signal in which the direction ...
user avatar
0 votes
1 answer
45 views

MCU Input capture

I will do input capture with any mcu. I assume a pulse signal will come as shown in the figure. There is minor noise(A,B,C,D) on the signal. Do these noises cause errors in rising or falling edge ...
user avatar
  • 13
0 votes
1 answer
36 views

Rectangular pulse coming as trapezoid in Simulink

I have implemented a mechanism where I am feeding a rectangular pulse train to a multiport switch which should give a switching sequence of rectangular pulses. However, I am getting the profile of the ...
user avatar
  • 1
1 vote
1 answer
66 views

Transfer Function of Controlled Capacitor Discharge

I've been having some difficulties trying to design a closed loop, current pulse control system that controls a capacitor's discharge to an inductive load. The basic operating principle is that there ...
user avatar
7 votes
2 answers
759 views

Measuring signal with of nanosecond pulse width with a spectrum analyser?

I'm looking to measure the signal width of electronic signals (device under test, DUT). The problem is that these signals have a quite short pulse width which would require me to use a GHz ...
user avatar
  • 117
0 votes
1 answer
70 views

How is creating a negative delay possible in this case?

I want to create a negative phase shift (delay) from an original clock source: Source will start, but at some point Vout will lead Vsource as follows: How can that be possible?
user avatar
  • 3,420
0 votes
2 answers
114 views

Amplifier circuit pulse width

I've made a circuit: Here is link to this circuit emulator: amplifier circuit The first scope is a 10 kHz input generator and the second scope is circuit output. Which element should be changed to ...
user avatar
0 votes
0 answers
51 views

Photodiode pulse detect system

We have a laser signal detection system as shown in the figure below. In this system, we want to detect the incoming laser pulse. The MCU will detect the incoming pulse and perform its operations ...
user avatar
  • 13
0 votes
2 answers
62 views

How does this circuit behave? (cap charge/discharge)

When I pulse, start signal should be at least 50ms HIGH before falling. To do this I must design R and C values to estimate capacitor C1 charge/discharge times. I get the schmidt trigger part, but I'm ...
user avatar
5 votes
1 answer
192 views

Understanding a sub-nanosecond pulse generator

I have been reading a couple of papers (1,2) that use a Step-Recovery Diode to generate sub-nanosecond electrical pulses, for the purposes of pulsing an LED. I am simply trying to understand the ...
user avatar
0 votes
1 answer
60 views

Drive NPN from Voltage Regulator?

I am trying to get two disparate camera systems to talk to one another, specifically an Arri camera with a Preston system, and specifically to transmit a tally signal when the camera is recording. ...
user avatar
1 vote
4 answers
194 views

Pulse a 555 astable oscillator every second without an additional IC

I am developing a ranging device to help people with blindness. I need to pulse a 38 kHz Infrared LED every 1 second. A 555 timer in astable mode generates the 38 kHz modulation. I'm currently using ...
user avatar
0 votes
1 answer
127 views

How to turn a short voltage pulse into a long voltage pulse or increase bandpass

First I am not an electrical engineer, but I am on a mission, so please forgive my lack of resources and ability to explain my concepts. I am designing a device for people with blindness. Currently it ...
user avatar
1 vote
3 answers
109 views

Show polarity of magnetic pulse using two LEDs

I have made this simple circuit: In response to a rapidly changing magnetic field (pulse), the LED blinks. An example of the pulse is shown below: Now I would like to have a circuit with 2 LEDs so ...
user avatar
0 votes
1 answer
40 views

Voltage droop and bulk capacitor selection

I have a fundamental question regarding bulk capacitor selection for a pulsed power circuit. Assuming I am switching a 2 kohms resistive load using a 2 kV power supply at a switching frequency of 10 ...
user avatar
0 votes
2 answers
88 views

I am planning to design comparator based on Opamp but I am not getting the exact pulse output in LTspice [closed]

I am trying to simulate this but I am not getting the exact "RECTANGULR" pulse output. Kindly help me to figure out where I am going wrong. I am going to use this circuit as pulse generator ...
user avatar
0 votes
3 answers
144 views

Pulsed Current Source Across Inductive Load

Just wondering if you guys have any recommendations for low voltage, high current pulsed power supply designs. The current required is 300A for a 0.14mH inductive load with 0.088Ω of resistance. The ...
user avatar
1 vote
1 answer
178 views

Liquid Resistors

Will a liquid resistor have different values with simple DC voltage versus pulsed DC voltage? And do voltage levels affect the resistance of a liquid resistor? For example, if test a liquid resistor ...
user avatar
0 votes
1 answer
36 views

How can use grounded primary coil transformer with BGJ/MOSFET

So, I have a pulse signal transformer like this (freq is 1MHz): In the secondary coil I want to get bipolar pulses. How can I make it using BJT or MOSFET switches and wich is better? I know, that ...
user avatar
0 votes
1 answer
56 views

What material of core should I use for signal 1Mhz pulse transformer

I want to make 1Mhz pulse signal transformer, and I don't know what material should I choose. I found some epcos cores like N49 but it is for power transformers. Also I found some material with low ...
user avatar
1 vote
2 answers
117 views

How can I change the rising time of signal pulse transformer?

I have a circuit where MOSFET drives signal pulse transformer, and I want to make variable rising time from (100 to 300 ns). How can I make it?
user avatar
0 votes
1 answer
88 views

Capacitor based pulse generator

I want to make a simple circuit where LEDs are alternatively turned on. I have, say, 20 green LEDs and 20 red LEDs. The first half second, the red LEDs should be turned on, the next half second the ...
user avatar
  • 73
2 votes
0 answers
63 views

What's the cheapest way to design this circuit?

I design a board with Power over Ethernet (PoE 802.3af/at) and the standard requires a "Maintain Power Signature" (MPS) signal, which is a 10 mA, 75 ms pulse every 325 ms (roughly 25 % D.C.)....
user avatar
1 vote
0 answers
99 views

Noise in pulse shaper with wide bandwith (MPPC signal)

I am using an MPPC with voltage amplification with the circuit shown below. The circuit is a pulse shaper to count photons, it counts with 4 amplifying stages (OPA 2846) and a comparator (LT1719) at ...
user avatar
0 votes
0 answers
72 views

Measuring extremely small inductance (pH) with transient pulse response

I've made an inductor device. It has 2 terminals. It has inductance, resistance, and some parallel interwinding capacitance. I am using a Keysight B1500a semiconductor probe station, which has ...
user avatar
  • 73
0 votes
0 answers
64 views

Tachometer pulses breaking down at lower speeds

I have a Noctua 4-pin PWM fan (PWM datasheet) from which I'm attempting to calculate RPM using the open collector tachometer output. I'm producing the PWM waveform using a Raspberry Pi Pico. Here's ...
user avatar
  • 133
0 votes
1 answer
79 views

Questions on building probe station and pulse measurement

I don't have a strong ECE background, so I may ask many naïve questions. I am building a probe station to measure pulses in a micro-coil, which looks like the following circuit. Because I want to ...
user avatar
  • 1
1 vote
2 answers
111 views

What could be the reason for degradation in the pulse shape in this instrumentation?

I'm experiencing long fall time issue for a 0.5ns pulse duration and 3MHz optical pulse source. The manufacturer test report provides the following pulse shape for the optical pulse. I don't know how ...
user avatar
  • 1,544
0 votes
0 answers
57 views

Wake up ESP8266 with wall switch

Using LTSpice and uninformed dabbling I've managed to produce positive spikes from a wall switch that I hope will wake an ESP8266 for use to control hue lights. Once awake the IC will debounce, read ...
user avatar
  • 101
0 votes
2 answers
337 views

Converting latching switch to momentary output

I'm trying to get a latch switch to send a pulse for around 3 seconds or so. The pulse doesn't need to be pretty or precise. The circuit will be used to sound a buzzer when the switch is flipped on. ...
user avatar
0 votes
0 answers
73 views

Strange pulse with N-MOSFET switching Raspberry Pi power supply

My schematic is as follows: 5 volts coming from a lab power supply (10 amperes.) Looking at the voltage input with an oscilloscope, I see this: A strange pulse going up to 5.08 volts every 500 ms, ...
user avatar
  • 23
1 vote
1 answer
89 views

Instrumentation for high frequency pulse

to be updated... I have an optical pulsed laser source (has no manual.) Its monitor output has on its certificate for at 3MHz frequency stated as 0.5 ns pulse duration (ON time.) The output supposed ...
user avatar
  • 1,303
-1 votes
2 answers
415 views

LTspice: is there a simple way to make pulse voltage source resettable?

I have a circuit in which I have to have a retriggerable one-shot pulse generator. The trigger event is an edge from a comparator. After the edge, a single positive pulse should be generated, duration ...
user avatar
  • 44
0 votes
0 answers
38 views

Hardware for time-gated signal

Hey, I am working on a design for an acoustic sensor, I am applying an excitation field at a certain frequency (a) and recording the response of the sensor (b), however, for my application, I only ...
user avatar
1 vote
2 answers
138 views

Detecting a missing single pulse of a pulse train

As part of a project I have a 4 MHz pulse train output of a device with 50% duty cycle. I need a circuit which can turn on a relay if a pulse is missing. I can take care of the relay interfacing but ...
user avatar
  • 1,117
0 votes
1 answer
65 views

Slow down a pulse (like 12hz / 3 to a 4hz output) [closed]

I am trying to output a slower pulse than is inputted into this mystery IC or circuit. This input pulse is digital and lasts for 1/10 of a second. Is there a chip that would allow me to proportionally ...
user avatar

1
2 3 4 5
11