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.

Filter by
Sorted by
Tagged with
0
votes
1answer
2k views

Using ICL8038 as a VCO

I wanted to use this function generator IC as a voltage controlled frequency output especially to obtain low frequency sine waves. But unlike many implementations, I wanted to control the frequency ...
1
vote
3answers
620 views

Square wave generator J1772

For an electric car charger I need to design a square wave of ±12V at 1kHz [SAE J1772]. I would like to make this one with a adjustable duty cycle so that the charging current can be adjusted. I ...
0
votes
2answers
63 views

How can I create signal interference in a circuit?

I understand that this is counter intuitive but, as an experiment I want to create interference in a circuit. I want to expose an AC sinusoidal signal to a second sinusoidal signal. This will cause ...
0
votes
1answer
75 views

Generating high frequency sine wave (up to 100MHz)

I am in the trying to design a sine wave generator. This generator should be able to sweep through a range of frequencies and the range would be 150 KHz to 80 MHz. the sweep rate is not more than 1.5*...
8
votes
2answers
498 views

White and Pink Noise Generator Circuit - Cryptic AC Analysis

The “Electronic Devices and Circuit Theory” book (by Boylestad, Nashelsky) gives a brief description of a random noise generator circuit at the end of “BJT AC Analysis” chapter. (Btw, exactly the same ...
0
votes
0answers
41 views

Measuring technique for bridge rectifier driven by function generator

I am confused about a problem I am having measuring the output of a full wave diode bridge rectifier driven by a function generator. I am only getting half of the output as if it where a half wave ...
0
votes
1answer
160 views

Controlling high voltage/current signals with a Pi function generator

YES, I understand corona, arcing, safety, and Ohm's law... I am building a high power AC/DC variable power supply: Microwave oven transformers, CW voltage multipliers, flyback transformer, variac... ...
0
votes
1answer
54 views

Oscilloscope voltage not matching function generator

What are the reasons why my oscilloscope shows a different voltage from my function generator? I have set the Vpp of the function generator to be 10V, but I set the probe to 10x and on the device, it ...
-4
votes
1answer
195 views

Building a low-cost oscilloscope and a function generator [closed]

I want to build an oscilloscope and a function generator as a graduation project in my university. Cost should not exceed 125$ or 250$ if the project has more additional features. I will display ...
0
votes
3answers
158 views

Unable to reduce noise and no proper sine wave is generated using LM358

We have planned to make 30 kHz pure sine wave using LM358, by the use of a Wien bridge oscillator, I have made a Wien bridge oscillator connection in LM358. I have calculated the frequency by using ...
0
votes
1answer
35 views

Output vanishes in op-amp

The circuit below is a PW modulating circuit: The output of the circuit is: But when I connect a resitive load to the output of the op-amp. The output vanishes: Can someone explain why is it ...
-1
votes
1answer
49 views

Does anyone know how can I deduce this formula for frequency from this sawtooth generator?

[ I know that this formula is correct, but I'm not sure how can I deduce it. Can anyone help me? Thanks in advance!
2
votes
2answers
501 views

What is a best way to get a 25% duty cycle square wave (5 V, 1 MHz) on a board?

I am trying to get two off-phase 25% duty cycle square waves(1MHz) to control a full bridge circuit. Update:Sorry for the confusion here, what I mean was to have 2 square wave signals, and introduce ...
0
votes
0answers
15 views

Using a BK Precision function generator to drive an amplifier. How do I trigger the output from the function generator?

I acquired a modern BK Precision function generator (Model 4052) as part of a project to run an amplifier for a piezoelectric device. While I have figured out how to set the appropriate parameters for ...
0
votes
1answer
49 views

Questions regarding AFG3000C function generator

I have a new function generator - model AFG3000C. I am having difficulty in understanding certain terms related to this function generator. I have tried online searches, but I couldn't get what I ...
1
vote
1answer
66 views

Function Generator Voltage and Current handling

I am using this Function Generator My circuit : FG input : 5V peak to peak. 1kHz. 1ms time period. 90% duty. I want to understand the below questions : Is it safe to do this connection? I have ...
0
votes
0answers
69 views

How to make a Ramp generator with a NE555 from 0V to 2/3VCC?

Hi Ladies and Gentlemen, It is related to an existing post here from early 2019. Voltage to PWM Circuit, need to understand frequency I am trying to make a simple 0-10V to PWM converter (idealy ...
3
votes
3answers
465 views

Do function generators produce AC signals in the sense we know?

When I examine function generators, there are a wide range of products. I see products between 7 USD and 600 USD. If they can do the same job, why is there so much difference in price? I can't make ...
0
votes
2answers
62 views

Reason for voltage between grounds on Oscilloscope and Function Generator?

I was using one of the little XR2206 Function Generator kits with my analog oscilloscope. It displayed a sine wave no problem - but I noticed that as I connected the ground strap of my oscilloscope ...
0
votes
0answers
17 views

Testing a charge sensitive preamplifier

I have a charge sensitive preamplifier (CSP) that can be used with a photomultiplier tube (PMT) detector. (http://www.cremat.com/CR-Z-PMT.pdf) I am trying to figure out CSP's working. I don't have a ...
0
votes
5answers
667 views

High power (but low frequency) arbitrary waveform generator

At least a few times I wished I had a "soundcard on steroids", so that I can replicate a specific waveform I'm getting from a generator, transformer or other devices I'm dealing with (e.g., see this ...
0
votes
1answer
102 views

Sawtooth wave generator not working in simulation

I tried to simulate the following PWM generator: The output at the PWM node records a constant voltage, not a PWM signal. So I simulated the sawtooth generator separately And the output of this ...
2
votes
0answers
45 views

Oscilloscope to Function Generator Trigger Delay

Simple question, is it common for there to be a delay between an external trigger out from an oscilloscope to the trigger in of a function generator? Specifically, I have a Rigol 1054Z oscilloscope ...
0
votes
2answers
47 views

Non-sinusoidal waveforms: relationship (resistance, capacitance)\$\xrightarrow{\text{affects}}\$ (amplitude, frequency)

During the laboratory we have analyzed the following two non-sinusoidal generators: square-wave generator triangular-wave generator Sadly we didn't have enough time to complete the last task. My ...
0
votes
2answers
65 views

writing Keysight Binary Arbitrary (.barb) waveforms

Keysight 33600 waveform generators load waveforms in either .arb (ASCII) or .barb (binary) formats. For large waveforms with more than ~10M samples .barb load much faster. How can I create .barb ...
16
votes
6answers
4k views

Hobby function generators

I am a physicist with a limited knowledge of electronic. I usually study my problems extensively on Internet before asking for a help. This means that here I will present both the questions and ...
0
votes
3answers
2k views

How to build a circuit that generates a sine wave?

How can I build a circuit to generate sine waves? What I am working on is building a 555-timer circuit that gives 50% duty cycle square wave, then using a low-pass or band-pass filter tuned to the ...
2
votes
2answers
344 views

Flashing “GATE” on the Bel Merit FG-150 function generator

What does the flashing in the bottom left corner of the display "GATE" means on this generator? I could not find a manual high and low. I found a discussion on GATE function here but it seems to ...
0
votes
1answer
43 views

how to reduce signal noises

I am trying generate guided waves on simple metallic plate through piezo-ceramic material, I place two piezo on the surface of the plate at the different location and through Arbitrary pulse generator,...
0
votes
2answers
125 views

How to construct a discrete circuit to send out a square wave with N pulses?

I want to build a simple and discrete circuit (without any integrated circuits) which puts out a square wave (50:50 duty cycle) with N pulses (rising edges)? For example for N=4 the output should ...
0
votes
1answer
58 views

Function Generator amplifier to drive resonance circuit help

I have a model resonance circuit that is excited with an auxiliary winding and I need to build an amplifier to be able to amplify the current from the function generator in order to drive the ...
2
votes
4answers
2k views

Generating a sine wave over a big frequency range

I want to build a circuit that can generate sine waves at frequencies controlled by a computer or a microcontroller. I would like to go as low as 0.01 Hz (down to 0.05 Hz would probably be acceptable) ...
2
votes
2answers
4k views

How to control a speaker

We are trying to produce a sound wave with speaker. We also need to be able to control the frequency (we don't have specific numbers, about 50-500Hz). As far as we are concerned we are looking for a ...
0
votes
1answer
1k views

Float Function generator

Why are the Outputs of many function generators earth grounded? As far as I understand grounding the generator or Parts like the chassis can reduce shock hazards if something fails within the ...
0
votes
1answer
50 views

Impedance of a function generator when off [closed]

I don't have a function generator at my disposal right now. I just want to know what's the typical resistance between + and - terminals of a function generator when it's not putting out a clock? ...
0
votes
0answers
107 views

RIGOL DS1054Z Fixed trigger time for sweeping using a FeelTech digital signal generator

How do you properly setup a frequency sweep with a digital signal generator and a RIGOL oscilloscope? I've got a setup similar to one in this video: https://www.youtube.com/watch?v=ni07A7sZCPM, ...
0
votes
2answers
144 views

Waveforms from a Function Generator, What is Good Enough?

I got an HP3311A function generator. The Sine wave forms below looks pretty bad to my eyes. Is it normal?
0
votes
1answer
45 views

How to infer the max current output of this function generator from its datasheet/specs?

I need to figure out the max current a function generator can output from its signal waveform output. Here is its datasheet. But there is no such parameter here. The output voltage can swing from -...
3
votes
2answers
1k views

Square wave to sawtooth wave using two BJT

I have two circuits that are supposed to be square wave to sawtooth wave converters: Both circuits receive a positive square wave as their input and generate a positive sawtooth as their output. Do ...
1
vote
1answer
110 views

Oscilloscope displaying two voltage levels (on the same channel) for square wave

Please excuse if this is stupid, I've been searching to see if I can find an answer to this on Google, but it seems I'm facing the issue in which I don't know how to describe the issue I'm trying to ...
0
votes
0answers
30 views

Making a common ground connection between a DC power supply and a waveform generator(33120A)

I would like to use a DC power supply to as a source voltage to a sensor and a waveform generator(33120A) to give another input to the sensor. I would like to know how can I make a common ground ...
0
votes
2answers
48 views

Keysight Waveform Building Software

I want to create a waveform for the agilent 33220a waveform generator. It is a 40us arbitrary wave that I have designed in the keysight waveform builder pro via the Benchvue software, however I want ...
0
votes
0answers
37 views

How do I turn a function generator into a current controlled function generator?

I'm using a custom pulse generator with voltage controlled biphasic (both negative and positive voltage) pulse train output to stimulate a living tissue which is grounded on one side. I need to be ...
0
votes
1answer
28 views

How to split mono signal to sterio siginal of AD9833 Sin wave generator?

I am sorry that I am not well aware in audio amplifiers, that's why I am asking this question maybe it's my stupidity. I have an AD9833 sin wave generator, I need to connect the AD9833's output to ...
0
votes
1answer
90 views

Function generator design

So i was asked to design a function generator that eventually produces a sine wave at the output of the circuit and this is what i have come up with so far. A Schmitt trigger and then an integrator ...
0
votes
1answer
81 views

Function generator output

A function generator is hooked up to two resistors in series. The voltage across the function generator changes over time, shown by the different graphs The questions asks to find the output voltage ...
2
votes
1answer
410 views

Voltage Divider with low noise?

I'm working with a nano scale motion stage with high precision. To move the stage I supply Sinusoidal wave using (Agilent Keysight) function generator. This F-gen, goes as low as \$20mV_{pp}\$ in ...
-1
votes
1answer
164 views

LED output with Photodiode and Function Generator

Some of my student and I are designing a Physics experiment involving a high power LED, a square wave from function generator (50 ohm output impedance) and a digital oscilloscope (1 MOhm imput ...
0
votes
0answers
100 views

Amplitude control in a signal generator

A am working on an FPGA based function generator and I am aiming for max frequency to be higher than 10 MHz, hopefully 30 MHz. I have implemented most of the functionality except amplitude control. ...
1
vote
1answer
77 views

Characterization of an Amplification/ADC circuit

I build a small amplification circuit in order to amplify the low voltage signals of my passive sensors (the sensors have a source impedance of about 50-200 Ohm and they output a low voltage signal in ...