Questions tagged [function-generator]

A function generator usually refers to a piece of test equipment that generates a variety of waveforms over a range of frequencies. A typical unit may generate sine, square and triangle waves at a frequency up to around 20MHz, they tend to be less often used at higher RF frequencies.

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Change pulses Duty Cycle

I'm trying to raise the Duty Cycle of short pulses (about 10%) through the all range up to ideally 80% using a potentiometer. I've seen variable pulse generators designs using 555s, but my trigger is ...
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Signal generator, DC offset, impedance into an open load - workarounds?

Video: MHS5200A Function Generator Review and Teardown I have the signal generator referenced in this video. As the video says, its output impedance is specified into an open load. It has a floating ...
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Electrolytic capacitor and AC

I'm doing an experiment to investigate the relationship between frequency and capacitance. The experimental setup is to connect an aluminum electrolytic capacitor to a function generator and use an ...
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Function generator with an operational amplifier

I am solving a function generator whose frequency of each output is 5kHz. My question is, how can I find the parameters of C3, R5 and R6 to get an output of the same frequency? In addition to the ...
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Measuring capacitance with an oscilloscope and a function generator

I was looking for a method to measure capacitance at high frequencies and found this document from Tektronix. It shows how you can measure capacitance with an oscilloscope and a function generator. I ...
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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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What kind of latch would be best to continuously store and feed in a series of inputs?

So I've got an assignment where I've two buttons and LED screen. One button inputs a '1' and the other a '0', and when four inputs are detected the screen displays the number eg. If I typed 0011 it ...
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What is the best video/textual source for learning circuit designing? I want to create a high amplitude, function generator? [closed]

I am a self taught software programmer, I have an electrical engineering project where I have to design a function generator of high voltage/amplitude using 555 timer. The function generator that I ...
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Half-wave rectifier with filter and clipped input signal in oscilloscope

When building a half-wave rectifier with a capacitor filter for my electronics lab, there was significant clipping at the peaks of the input signal. When looking at the .csv file pulled from the ...
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LHT00SU1 logic analyzer clock generator

I was using a LHT00SU1 logic analyzer and according to this it should have the capability to produce a variable frequency signal (i assume through the CLK pin). Using pulseview with fx2lafw firmware I ...
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AD9833 Function Generator - Poor square waveform

I have built a function generator using an AD9833 board, using the schematics found here. The circuit seems to work well, but the square waveform that it outputs isn't great and there is some ...
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Is lead color a safety issue?

BNC to alligator clip connectors were made for a function generator in our lab. Whoever made them decided that the ground connector wire should be red and the signal connector wire should be white. ...
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Higher voltages between protective earth ground (mains) and function generator than expected

I uploaded a video to YouTube specifically to help me explain my question. Please watch it if you can. Otherwise, here is my text-based description: I have an oscilloscope, function generator and ...
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Inject tone into computer

I'm using the circuit at the bottom of this post to generate a triangular wave, which I'd like to inject into a computer's microphone jack. My computer has a single audio jack. When I plug a TRRS ...
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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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Why do I get 0 volt output when I have a voltage divider with a square wave input?

I would like to state the problem I am dealing with which I cannot explain. The set up I have is as follows: 2 x resistors 1 kΩ, 1 x breadboard, Wires, 1 x Voltcraft DSO-6202FM oscilloscope which has ...
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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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How to measure the frequency response of a waveform generator?

I was looking at the data sheet of an arbitrary waveform generator and found a plot of the frequency response of the instrument, then wondered how it was measured. I know how to measure the frequency ...
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How to generate a complex sinusoidal signal on a function generator?

I can't relate some of the equations or mathematical expressions commonly seen on circuit analysis textbooks to the real world. For instance, if I'm given an input signal mathematically expressed as \$...
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Tuning Op-Amp Integrator for Triangle Wave Generation

I'm trying to simulate an op-amp integrator that can generate a triangle wave from a square wave. Unfortunately, my waveform is anything but triangular; if anything, it's another square wave with a ...
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How to understand a complex diode-resistor function generator circuit?

I'm reverse-engineering a CRT anti-pincushion circuit and it uses a complex diode-resistor circuit to approximate the function X-k×X×Y², where X and Y are the deflection voltages. My question is if ...
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How to amplify a signal from a function generator from 5V to 35V?

I have a function generator that has an output voltage of 10Vpp. I need to use it to drive a voice-coil-actuator (VCA) that operates on 35V and 11.7A. I was searching for a solution to amplify the ...
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How can I generate an exponential signal in simulation software?

In Multisim, I can generate a few signals using the function generator like sine wave, triangular wave, square wave. Can I generate a signal like \$i(t)= 2e^{50t}\$ in Multisim software or any other ...
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Circuits that can generate a square wave current

I was searching around for circuits that could generate a square wave and I noticed that they all have only one output and can't generate a current. For example: Now, measuring across the positive ...
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Modern components to change old Soviet ones to make ion generator

I am trying to make the same scheme to get an ion generator. I found this one on the Internet and have difficulties finding the components in Europe as I cannot find their names in English. Can ...
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Square wave from comparator drifts and the integrated square wave doesn't yield a triangle wave

I am trying to make a function generator. The generator runs on 16kHz, the rails are +12/-12V for test purposes. I basically obtain a sine wave with an oscillator, drive a comparator (LM311) with the ...
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From sine wave to square wave

I want to make a square wave generator with an LM311. I have a variable sine wave source from 1Hz to 16kHz. The amplitude can vary between 0.5V to 11.4V. I tried to use the comparator circuit below ...
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TL071 does not integrate my sine wave

I want to make a homemade function generator. I used a Wien-bridge oscillator with a UA741 to produce the sine wave, amplify it with another UA741 because it has quite low amplitude, then integrate it ...
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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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DDS - find optimal size for LUT, PHACC and sampling freq for application

I had the following question. About the topic of DDS you can find a bunch of information on the net and i think i understood the basics relatively well. You use a lookup-table with stored values of ...
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Transistor Ic vs Vce Curve Trace for one 2N3906 Shows Weird Scope Display Not Sure Why

I recently built a transistor curve tracer on a breadboard with my Oscilloscope and Arbitrary Waveform Generator. Most BJT Si transistors (NPN and PNP) show typical/normal traces but one device under ...
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How Can I Get a Stable Triangle Wave With Adjustable Frequency

I am trying to make a wave generator. It will have switch modes for frequency between 1.6kHz to 1.6Hz with x10 increments. Everything is set except the triangle wave. I use a wien birdge oscillator to ...
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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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DIY function generator with an operational amplifier

I am trying to make my own function generator. I will make it with adjustable frequency and peak voltage but for test reasons I'm simulating a constant frequency one. My output has distortion which I ...
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Is there an alternative to GCV (generator control voltage) to synchronize frequency sweep measurements?

A friend is taking a course in electronics engineering and asked me for help reproducing a lab experiment in frequency sweep measurement techniques. Students build a small RC filter and use a function ...
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Unknown function generator [closed]

I've found this Function Generator in the deep of school's Lab: I wasn't able to find an user guide or any similar document. I'm not sure on how to correctly use it. For example, I don't know: Which ...
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How to implement "burst" functionality for bare-bones function generator

Some fancy function generators have a burst feature which gives precise control over on-time and periodicity of the desired waveform. Ex: For my application, I have a 25 MHz sin wave (2.5 Vpp) and, in ...
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High voltage amplification of a waveform generator output

I need to drive an ultrasonic transducer with a high center frequency (25 MHz) using my function generator that outputs a 25 MHz sine wave at only 5 Vpp. The problem is that the transducer needs at ...
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Can software defined radio be used as noise generator?

I'm working on solving an issue in a metal detector that generates false detects when subject to electrical interference. The electrical interference usually stems from devices such as shortwave radio ...
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Fast voltage regulator for output of an function generator

First, I am not an expert in the electrical field:) In a real-time control system (in LabVIEW), for actuating a piezoelectric, I use the generated signal (sine signal 20khz and 10<V<100 Vpp) ...
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50 ohms output termination for a 50ohms load?

Would the voltage measured at the 50 ohms still be doubled to the reading on the function generator? I am new to the concept, from what I know, the 50ohms function generator outputs double the voltage ...
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Why do we generally add capacitors in series with AC sources when DC also exists in the circuit?

This is probably a noob question but, essentially, why do we often place capacitors in series with AC signal sources? I understand that we sometimes want to isolate the DC signal to "its own"...
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12 votes
4 answers
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How do digital function generators generate precise frequencies?

I was designing an electronic circuit that requires precise frequency control when I realized how much I don't know about the frequency synthesis itself. For example, when I take my low-end 2-channel ...
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Can you measure the voltage of a capacitor with using an oscilloscope without a function generator?

Can I just use my oscilloscope to measure the voltage across a capacitor or will I need a function generator for that? For some reason it shows what looks to be like a capacitor charging if I am not ...
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The input of the op-amp (DC power supply & function generator)

What is the difference between a DC power supply (PS) and a function grnerator(FG) as an input of an op-amp? While trying to test my summing amplifier circuit, I figured out that the op-amp do not ...
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Function generator directly from power on to use

I'm using a function generator. When I power it on, I need to push a button so I can use it (AFG 3022.) Is it possible to do something (the settings says nothing about this) so when I power ON it ...
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What is the maximum voltage I can set up on the AFG2125 function generator?

So, I'm picking up signals to work on the lab with the AFG2125 function generator. I have this generator on the lab https://www.gwinstek.com/en-global/products/downloadSeriesDownNew/5412/442 and on ...
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Testing the strength of a B filed from loop of wire and limitations of a function generator

I built a coil that receives magnetic fields (Rx) from a sending coil (Tx) a few centimeters away. (wireless power transfer) I send waves to the Tx at the Rx's resonant frequency since its a loop with ...
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MOSFET Driving problem

I have this MOSFET Driver IC 16 Pin Package Specification - Maximum Drain Voltage 16V. Maximum Drain Current 7.5A EDIT: Schematic : All the Enable, Sen and Sel signals will be provided by a separate ...
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Output current capability of a waveform generator

I would like to drive a mosfet on and off with a waveform generator. Nevertheless I would like to estimate the time it takes for turning off and on the MOSFET. I did not find the output current ...
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