Questions tagged [waveform]

The shape of a value (usually voltage) when graphed over time.

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How do I import a .wav or .csv file into LTSpice to be used as a voltage source? [closed]

I am currently working on a project as an intern that requires me to import .wav or .csv files into LTSpice. These files have been produced by using an oscilloscope, and now I wish to use them in ...
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Constructive Interference of two AC waveforms [closed]

Is this correct? We have two AC waveforms of the same phase. 4000V 0.03 amps -> 120W 12V 60 amps -> 720W Total Watts 840W If these two waves undergo constructive interference: 4012 * 60.03 -&...
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2 votes
1 answer
225 views

Smooth wave plotting using 3 inch thermal printer [closed]

I am interfacing 3 inch Fujitsu thermal printer (FTP-638MCL103) with STM32. Character printing is working fine. I am struggling to print smooth sine waves generated from a function generator. I want ...
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How do you sketch a signal given by x(t) = A(t/T) for time period 0 to T? Does t/T simply denote that the signal covers entire duration of T?

Does t/T simply mean that the signal has magnitude A over the entire "T" duration? Or does it mean that it covers only a fraction? How will it look? I tried assuming A to be some magnitude ...
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How to enrich harmonics in audio?

I'm designing a guitar pedal to boost harmonics in the signal here: Falstad Link I'm wondering if there are ways to boost harmonics that don't clip the signal, as well as any adjustments I should make ...
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1 answer
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Difference between waveform and truth table [closed]

Is there a difference between waveform and truth table to represent the values of a circuit? For example: Are there particular cases where one or the other should be used?
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2 votes
1 answer
107 views

Triangular waveform with low noise

I have a task to generate a triangular signal with variable amplitude and support. The figure shows the type of signal and what parameters I want to change (“d” and “o”). Moreover, I need to change ...
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3 votes
2 answers
219 views

How can I generate this waveform?

I am trying to generate this waveform: basically a ramped square wave with a maximum frequency of 1KHz. My first thought was to use the DAC pin of a microcontroller, but are there any ICs that can do ...
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3 answers
343 views

Op-amp square wave to triangle wave converter not working as expected

A follow-up to a similar question from yesterday since the problem I've run into has differed enough to warrant something more than an edit. I have built an integrator to act as a 5V 32Hz square wave ...
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3 votes
1 answer
216 views

Square wave to triangle wave converter using Op-Amp not working

I have built an integrator to act as a 5V 30Hz square wave to triangle wave converter. My output currently looks like this. I am unsure why. The value of the triangle wave amplitude, according to ...
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2 answers
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Creating a low frequency triangle wave with PWM from an MCU

I am trying to generate a 30Hz triangle wave from a MSP430FR5994 MCU (specifically with the MSP430FR5994 Development Kit. The reason why I am trying to do this is for a Continuous Wave, Frequency ...
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3 votes
2 answers
580 views

Waveform generation on FPGA

Can anyone give me an idea on how to generate this RF waveform on FPGA? I already have the I(cos) and Q(sin) signals generated just need a guide to produce this weird shaped pulse. Edit: This is the ...
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Modelsim Image Export Do Command

Is it possible to export a waveform in Modelsim as an image using a do command? I am able to do this through File->Export->Image, but I would like to automate the process to just spit out the ...
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2 answers
117 views

How to generate an impulse response in practical way

The impulse response is the derivative of the step response. But if I simply use differentiator, the signal seems to be unstable. Can I generate an impulse response using waves in normal waveform ...
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3 answers
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Does the 555 timer 50% duty cycle capacitor discharge not affect the output voltage?

I'm new to the 555 timer and I'm trying to understand the configuration shown in the image below. The tutorial mentions that the capacitor C1 now charges and discharges through the resistor R2. The ...
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3 answers
120 views

Regenerated current during deceleration of PMSM motors

Let's say that a VFD is powering a PMSM and the motor is rotating at rated speed. The motor is connected to a high inertial load, so it cannot decelerate quickly. Now if the VFD commands a quick ...
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1 answer
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Problem amplifying differential signal from DAC

I encountered a problem while designing my own waveform generator. In my design, I am using a DAC (DAC5662) to generate different types of signals, and then I amplify the signal using an operational ...
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1 vote
3 answers
95 views

Electromagnetic radiation diagram

Would I be correct to assume that this diagram isn't really how the field propagates in space? But it's just an illustration of the changing electric field strength as a function of time? For example ...
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2 votes
2 answers
164 views

555 Timer with 50% duty cycle

I've seen below 555 circuit which produces a square wave of 50% duty cycle. I am quite new to electronics and I saw Ben eater's 555 timer tutorial where he used discharge pin for capacitor discharging....
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1 vote
0 answers
91 views

Inductor voltage not decaying to 0V by t=5 TC

In a new lab I have the following circuit: The inductor will change from 200 mH -> 400/600/800 mH. I am starting with 800 mH. The function generator is a square wave at: 50 Hz, 20 ms period, and ...
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1 answer
64 views

RC circuit waveforms not lining up on oscilloscope (capacitor starting negative)

I have a lab for a circuits class and in it we are building an RC series circuit with a square wave input. I am using a function generator to produce a square wave at 50Hz, period = 20ms, Amp = 500mV,...
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1 vote
1 answer
116 views

What could cause this flyback output current oscillation?

I designed a dc-dc flyback converter that is expected to reach 30 W output power. But it seems there are problems with reaching maximum power. Firstly I tested without the input filter and with non-...
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Inductor saturation current

im trying to determine an inductor's saturation current, i use a pwm with a gate driver (tlp250) and a 0.4 sense resistor at the source which i prope across to capture the current waveform. I salvaged ...
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4 answers
159 views

440Hz triangular wave generator makes slow non-triangles

I'm attempting to generate a 440Hz triangular wave with the following circuit powered by a +5 V DC supply: The circuit uses an NE532 low-power dual op-amp to build a square wave generator (left-hand ...
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1 vote
2 answers
224 views

How to make this arbitrary waveform?

Im trying to generate a custom waveform based on the instrumentation amplifier. The concept is that using two signals* , square 2Vpp and triangular 1Vp, get the next output: Under the next ...
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1 answer
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BJT twin transistor astable multivibrator always outputs high

Noob here (again). I have made this schematic of an astable multivibrator and a Raspberry Pi. I want it to produce a square wave, but it just outputs high constantly. I use the Raspberry Pi as a ...
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1 answer
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Why isn't my generator able to output the correct signal in a closed circuit?

I have a Siglent 1032X waveform generator. When I try to output a certain DC signal, my multimeter shows there's a significant voltage drop across the generator itself in a closed circuit. For ...
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1 answer
132 views

Double pulse test time interval [closed]

Keeping all other parameters (like DC bus voltage, Bus capacitance, Inductor value, etc.) fixed, and only changing the time interval between the two pulses, why would there be a difference in the peak ...
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1 answer
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Current flow in full wave bridge rectifier during negative half wave

I was watching a video on full wave bridge rectifiers and was wondering why the current flows in the direction of the green arrow (+ to point C) during the negative half wave, instead of going in the ...
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2 answers
194 views

Buck converter waveform

It became very hard for me to understand the concepts associated with buck converter waveform. What is the role of capacitor in its output terminal? Is it used for smoothing the voltage ripple? Why ...
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0 answers
63 views

Reduce the effect of half wave rectifier on transformer

I have an electromagnetic feeder drive which is supplied from a transformer. When I see the catalogue of the drive I noticed it using just the positive pulse of the AC source (half wave rectifier.) ...
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4 votes
6 answers
638 views

Waveform result of an equation

I have this waveform and I would like to have the Y. I know that the equation is Y = D' + E' + F'. Where it has ' it means NOT. ...
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3 answers
220 views

Function Generator to Audio Amplifier

I am looking to control a Helmholtz coil with a function generator but I need a waveform amplifier to increase the current and voltage from the function generator. The coil has to be run using low-...
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-1 votes
1 answer
94 views

can we convert triangle wave to DC voltage? can i get any model circuit? [closed]

i've achieved converting square wave to DC by voltage doubler, where in case of triangle wave its hard to find solution to convert it into dc voltage triangle wave form frequency is between 100khz to ...
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1 vote
1 answer
96 views

Measuring a 10s waveform with a oscilloscope

I have a MDO3034 oscilloscope which I need to use to measure a waveform for ten seconds. This waveform is a PWM whose duty cycle varies every 0.2ms or so, and restarts itself every ten seconds. I need ...
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2 answers
245 views

Normalize a sinusoidal wave to a fixed voltage [closed]

As input I have got a sinusoidal wave of variable amplitude (Vin). This amplitude can be whatever between 0.5 V to 5 V for example. I want to normalize this input to a fixed sinwave with amplitude ...
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74 views

Can't Make Square and Triangle Waves

I have the following c++ code for making a sine wave using SFML, which i got from https://github.com/SFML/SFML/wiki/Tutorial%3A-Play-Sine-Wave. ...
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1 answer
70 views

Siglent SDS1104X-E Integrate Function - Units of Measure

I am using a Siglent SDS1104X-E four channel oscilloscope which has a variety of math functions, one of which is to integrate a signal. Currently I am measuring a voltage pulse across a gate resistor ...
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3 answers
824 views

Why does my op-amp circuit output a rectangle wave form instead of sine?

After tons of research on the web I still don't know what the problem is. I'm trying to simulate a non-inverting voltage amplifier. It is supposed to generate a similar waveform but when I use the ...
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0 votes
1 answer
64 views

How to improve and add frequency adjustment function to my DIY wave generator? [closed]

Introduction I want to build a wave generator. I chose wien bridge oscillator(WBO) as my oscillator and I obtain other waveforms by filtering the sine wave I get from WBO. I managed to get a fairly ...
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5 votes
2 answers
147 views

Capturing mains AC waveform with audio recording device

I'm wondering how practical (read: safe) it would be to use an audio capture device to "record" a mains AC signal for the purposes of monitoring the characteristics of the AC sine wave. I am ...
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1 answer
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Inductive Crankshaft Sensor Operation

I would like any possible explanations/diagrams of how the waveform voltage rises at the point where the missing tooth/teeth of the reluctor wheel approach and pass the Inductive Sensor. This is just ...
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5 votes
2 answers
239 views

LED not outputting square wave signal

I'm working on a sensor similar to an oximeter that measures light attenuation through a medium. I have an LED on one side, and an IC photodiode with on-chip transimpedance amplifier (OPT101) on the ...
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1 answer
164 views

Waveforms of BLDC motor

I am using L6235 to drive a BLDC motor with hall sensors, but I am not sure about the motor's wire connection. Can you tell which connection is correct by looking at the waveforms? datasheet of L6235: ...
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6 votes
4 answers
288 views

Why do we use the terms AC and DC if they have nothing to do with current?

It seems archaic, maybe that we use the term AC (alternating current) and DC (direct current) to talk about power systems. After all, it is the voltage waveform we're usually referring to. In my first ...
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4 votes
4 answers
176 views

What could be generating this waveform in an EMC Compliance test?

We are having trouble with a CISPR-11 (EN55011) Radiated Emissions Class B compliance test in one of our solutions. The troubling part of it is basically an industrial motherboard (with a commercial ...
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1 vote
2 answers
68 views

Current values after power factor correction

I am a student tasked with correcting the power factor of an RC circuit to unity with a parallel inductor... Vrms = 240V, 50Hz R = 12ohm C = 220uF. I have calculated the inductor value by calculating ...
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1 answer
109 views

Why does my VHDL simulation fail after one input for this device?

EDIT: Found a solution. See the bottom of the post I am wondering why my simulation of the following entity fails to run for more than one input. When I change the inputs, the system crashes, and I ...
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1 vote
1 answer
39 views

Can AC harmonic quantities be expressed as a sum of phasors of different frequencies without confusion?

https://www.electronics-tutorials.ws/accircuits/harmonics.html The problem with AC harmonics is that each term has a different frequency, being a integer factor of the first frequency. I was wondering ...
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0 votes
2 answers
77 views

Square wave, triangle wave etc. not defined in International Electrotechnical Vocabulary (IEV.) Are they not standard terminology?

Why are there no definitions for typical terms like square wave, triangle wave etc. in the International Electrotechnical Vocabulary (IEV)? Are these widely used descriptions not defined by ...
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