Questions tagged [waveform]
The shape of a value (usually voltage) when graphed over time.
291
questions
1
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3answers
72 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-...
-1
votes
1answer
49 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 ...
1
vote
1answer
61 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 ...
0
votes
2answers
96 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 ...
0
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0answers
69 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.
...
0
votes
1answer
16 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 ...
0
votes
3answers
94 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 ...
0
votes
1answer
49 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 ...
5
votes
2answers
101 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 ...
0
votes
1answer
33 views
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 ...
4
votes
2answers
193 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 ...
0
votes
1answer
52 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: ...
3
votes
2answers
178 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 ...
0
votes
0answers
26 views
Inaccurate differential voltage measurement
I tested 3-level PFC voltage initialization event in practice using 1 x single ended probe to measure the output voltage as well as 3 x differential probes to measure the precharge voltage levels of ...
2
votes
3answers
121 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 ...
1
vote
2answers
58 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 ...
0
votes
1answer
72 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 ...
1
vote
1answer
36 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 ...
0
votes
2answers
74 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 ...
1
vote
1answer
47 views
Triangular wave to sawtooth wave
wanted to design a sweeper circuit to change a triangular wave into sawtooth wave. Is there a schematic for this to design a circuit?
0
votes
2answers
97 views
Simple current transformer strange waveforms
I'm trying to build simple 50Hz current transformer (just to see the mains current - maybe some microcontroller measurment in the future) following the answer to this question.
When I connect it to a ...
0
votes
4answers
133 views
How can you generate this waveform?
I'm looking to make a circuit that takes a 20-30VDC input and, when that goes high, generates a signal that also goes high, but to a different voltage (2-10VDC). Then after some time of being high (on ...
-1
votes
1answer
99 views
What are the waveforms of radio frequencies?
What is the waveform of radio frequencies?I thought they are sinusoidal am I wrong?
0
votes
1answer
17 views
How can the charge time/startup time for a boost generator be calculated?
I've been reading about boost converters and how to do calculations with them, but I haven't found equations/an equation for determining the startup (?) time for them (where the load has a high ...
1
vote
1answer
45 views
Do I need more capacitance for my crystal?
I've used the formula "CL = (C1 * C2) / (C1 + C2) + Cstray" (where C1 = C2) to calculate the capacitors I need for my board. CL is 18pF, I ballparked Cstray at 5pF, meaning I should use ...
8
votes
9answers
5k views
If a square wave has infinite bandwidth, how can we see it on an oscilloscope?
If a square wave requires infinite bandwidth how can we display it on oscilloscopes?
Link: Oscilloscope fundamentals.
2
votes
1answer
52 views
Obtaining frequency of 550 Hz from Simple Triangle and Square Waveform Generator Circuit
First time asking a question so sorry if I miss some things. I'll try to be thorough and straightforward.
I'm trying to design a square wave from a triangle wave-square wave generator circuit.
The ...
0
votes
1answer
149 views
LM358 waveform generator issue
I would like to generate a 30 kHz & 60 kHz sawtooth waveform using an LM358P operational amplifier per the following schematic.
Theoretically, and in the simulation, the circuit should work ...
0
votes
0answers
50 views
Why this stabilisation issue occurs for this waveform?
I'm using this simple wave folding schematic:
This would be best described with two short videos. Both videos have triangle input into wave folder, and I am changing the amplitude with trimpot.
First ...
1
vote
1answer
105 views
Resulting current waveform of square wave voltage applied to capacitor/inductor
If a square wave voltage waveform is applied across a pure capacitor or inductor of a given capacitance/inductance, how will the resulting current waveform look? How should I calculate this using the ...
0
votes
0answers
61 views
Voltage booster for an Arduino Uno waveform generator
Recently I made a waveform generator using an Arduino. Its output is only 5 volts, but I need 113 kHz with 15 or 12 volt (I think) for an ultrasonic mist maker. Is there a circuit to increase the ...
0
votes
0answers
78 views
Pros and cons of supercapacitors in defibrillator
Basically I wonder about pros and cons of using super capacitors in defibrillator. It is known that 1.5 - 7 kV signal with duration from 1 to 200 ms is applied. The energy should not be more 200 J.
...
0
votes
1answer
124 views
Rise time of 6N136 opto-coupler
I am trying to use below circuit for convert 24VDC high speed pulse to 5VDC pulse that can interface to a stepper driver IC.
I have used 6N136 opto-coupler and according to its datasheet it can handle ...
0
votes
1answer
65 views
Strange Waveform Using FPGA with NI myDAQ
I am testing my Microsemi FPGA with a NI myDAQ and am getting some strange waveforms. All that I am doing is inputting a 3Vpp square wave at 10kHz and expecting the same output since my code is just ...
4
votes
3answers
300 views
Circuit find IB, IC and VCE?
I'm asked to find IB, IC and VCE.
This is my answer:
I wonder if my answer is true are not. VCE Value is negative, is this true or not?
1
vote
0answers
66 views
What am I doing wrong? Waveform generator and Oscilloscope test
In the circuit below, PS1 is a waveform generator. Originally, there will be the secondary of a current transformer. R36 is a MOV, D11 is a TVS diode and R29 a burden resistor. D12 sets the non ...
1
vote
1answer
83 views
How to count these spikes?
This signal is from an instrumentation amplifier,
read from Arduino MEGA2560 ADC,
loop delay 10ms (rate 100Hz)
I need to count high spikes only, (in below figure, 6 high spikes can be observed)
Edited ...
0
votes
2answers
160 views
Gaussian signal generation circuit
I was studying op amp application and saw the square wave, triangular wave, sine wave. I was wondering if it is possible to generate Gaussian shape wave with op amp. I am basically trying to modulate ...
1
vote
2answers
161 views
Best waveform for Radar
I was wondering what would be the best waveform to generate for a phased array short range imaging radar? Square, sine, etc. Also what frequency would be best to operate at for the carrier wave given ...
0
votes
1answer
151 views
Can a DAC produce only positive output?
I'm working on a project requiring production of sinusoidal waves. Normally, from my understanding, a DAC can produce a waveform that alternates between a negative voltage and a positive voltage, but ...
2
votes
2answers
98 views
Transient solution of current in circuit with two coupled inductors, with resistances
Circuit in question is given below. I want to find why I can not get the
same current waveform as PSpice gives me.
Basically I want to calculate formula for i1(t) by hand and get something as close ...
0
votes
1answer
57 views
Smooth signal using a capacitor [closed]
This is a full wave bridge rectifier
I have read that if you put a capacitor parallel to the load resistor instead of DC pulsed signal we get a more smooth DC signal.
However I am unable to ...
0
votes
0answers
157 views
Output waveform of an SMD crystal oscillator
I am going to setup lwIP on STM32f107RCT6 with DP83848 PHY device. The green LED of RJ000002 ...
3
votes
3answers
229 views
Measuring the waveform of mains voltage using an oscilloscope
I understand this is a recurring discussion, but I still can't find a concrete answer to this question.
I would like to know how can I inspect the waveform of my UPS output (230V) using an ...
0
votes
1answer
56 views
Understanding voltage sampling rate of induction motors
Why it is required to have a sampling rate of at least 4kHz when sampling the voltage waveform of a three phase induction motor?
I find most research papers use 4kHz but they don't state why.
I want ...
1
vote
1answer
78 views
Input Voltage vs Output Voltage for a Shunt Positive Clipper with Bias Voltage
Assume voltage drop across diode is 0.7V in this case.
From what I understand
When V(input) is positive, but less than 0.7+V OR When V(input) is negative AKA When the diode is acting as open circuit:...
13
votes
4answers
3k views
What is causing this distortion of a pulse wave when recorded to a reel-to-reel tape?
I'm currently trying to record a pulse train used as a tempo clock for music instruments (e.g. output of Korg Volca 'sync out') onto my Fostex M-8 reel-to-reel recorder, with the aims to then ...
6
votes
3answers
3k views
Operating principles of a sawtooth wave generator bootstrap circuit
In one of my assignments, I was asked to explain the working principles of the sawtooth wave generator shown below. The input voltage is a spiked waveform obtained from a differentiator circuit.
I ...
1
vote
3answers
173 views
Source voltage and voltage across inductor waveform
I did an RL circuit experiment. It is a series circuit with a potentiometer, inductor, and a DC source.
Here is the resulting waveform at 2 different resistances (ch 1 is source voltage and ch 2 is ...
0
votes
4answers
79 views
Find the average power dissipation of the load
I have given the following voltage and current waveforms.
I am required to find the average power dissipation of the load.
I know \$ P_{avg} = \frac {\int_0^T \mathrm{v}\mathrm{i}\,\mathrm{d}...
