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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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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 ...
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24 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 ...
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33 views

Bandwidth of triangular wave for desired linearity

I'm attempting to replicate the Wavetek Model 188 Function Generator with original circuitry. This function generator has a 'VCG (Voltage Controlled Generator)' input which allows the user to apply ...
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1answer
50 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 ...
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39 views

Can a transformer damage a function generator?

I was playing around with a Siglent SDG 1032X and a small transformer, that I have directly connected to the generator's output, when I have reached the over voltage protection: I have accidentally ...
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37 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 ...
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47 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. ...
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27 views

DC biased sine generation using raspberry pi

I'm trying to make a sine wave generator using a Raspberry Pi. I need an sine wave(1Vpp) with user supplied frequency riding on a 4V DC bias. The SoX package seems useful to generate sine waves and ...
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55 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 ...
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2answers
72 views

BJT Astable Multivibrator - What is the max. oscillation frequency?

What is the max. oscillation frequency of this Astable Multivibrator circuit? Is it directly related to transition frequency of the transistor? I plan on using it with BC547B transistor. The hardwired ...
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23 views

Effect of impedance mismatch on phase of the signal

The effect of impedance mismatch on voltage measurement is known but is it possible for impedance mismatch between a oscilloscope and function generator to cause a phase difference? In my setup I have ...
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1answer
59 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 ...
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1answer
47 views

Differences in voltage measurement at the input of a circuit

I am trying to understand the difference I am seeing in voltage signals, that I am applying to my circuit's input. So the basic layout is shown in the diagram, I have a connection, A from my function ...
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41 views

Upgraded flipflop square wave generator - did I do good?

I've drawn up a simple multi-frequency square wave generator, based on a astable multivibrator circut, with frequency trimmed by the two ganged pots (both 100k) and the range set by a DPDT switch, ...
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3answers
72 views

Tektronix function generator THD

I am confused by the datasheet of the AFG3021C: https://www.tek.com/link-click-count?nid=75006&url=https%3A//download.tek.com/datasheet/AFG3000C-Arbitrary-Function-Generator-Datasheet-75W282817....
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2answers
142 views

What device can convert (EEG) voltage data to real voltage? [closed]

I seek a device that can be programmed to output physical voltages based on a set of datapoints. For example: ...
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1answer
154 views

i want to duplicate a signal generator output

I want to duplicate signal generator output to dual. since i want to use same signal to two different place. Is this possible without amplifying and inverting the signals. Let me share some circuit. ...
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1answer
153 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 ...
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4answers
57 views

When reading the digital wave from a DAQ, should I be getting the same wave I'm generating to it?

I am using a DAQ device, which is said to be capable of 400kS/s maximum, and therefore 50kS/s per channel when using all 8 channels. This is listed in the manual of the 1608fs plus DAQ So I connected ...
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563 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 ...
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1answer
243 views

10MHz Sine Wave Generator

I have been looking for some time for a good design for a ~10MHz sine wave generator, with variable frequency from about 5-20MHz. The max required peak to peak amplitude is 10V. Many suggestions on ...
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4answers
495 views

Why can we hear the full range of square waves from 1 Hz-20 kHz, but not sine waves of the same frequencies?

I connected the output (50Ω) of a function generator to a 35 watt 5Ω speaker. When I sent square wave signals of 1 Hz-20 kHz to the speaker, my friends and I were able to hear them. But ...
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187 views

No output reading from Op Amp on Oscilloscope

So I have an inverting op amp (gain = -1) wired up, and it works with a DC signal. I checked the DC signal by measuring the input and output voltages with a multimeter which were 5V and -5V, ...
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51 views

How to use a signal from one function generator to gate another signal from another function generator?

I have 2 function generators with me and each is outputting its own signal. The first one is a 100kHz square signal and the second one is a 10MHz sine signal. What I want to do is use the first signal ...
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33 views

SCPI - program signal generator to stack existing signals

I have a Keysight 33500B signal generator and I would like to remotely program arbitrary (ARB) waveforms that consist of existing signals in the device's library, ...
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2answers
250 views

Why do I get a triangle wave in this Schmitt trigger oscillator?

I'm trying to design a function generator that can generate square, triangle and sine waves, with frequency varying between 100Hz and 100kHz. The circuit in the blue box is supposed to be a schmitt ...
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74 views

Output impedance function generator, limiting the current

I've the following schematic: simulate this circuit – Schematic created using CircuitLab Now the R of 50 ohm does limit the current that be supplied to the load. Is there a way to be ...
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4answers
432 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 ...
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3answers
232 views

What DIY Function Generator is Suitable to drive a Pasco WA-9857 String Vibrator?

Preface... total amateur. I picked up 8 Pasco WA-9857 String Vibrators off of eBay for an art project. I need some way of driving them individually.... cheaply. So I bought a $12 XR2206 Function ...
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2answers
221 views

How can I increase the AC voltage from a function generator?

I'm doing an assignment where the objective is building a function generator. We used AD9850 to generate a wave but its output voltage is below the requirement. (We require 10 Vpp, but mine is about 1 ...
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3answers
395 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 ...
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2answers
2k views

Sawtooth Wave Generator Using Op Amps

So I'm trying to design a sawtooth wave generator that goes from 2.5V to 3.25V. I'm using this design: I'm getting a voltage range from around -4V to 4V. Is there any way for me to get 2.5 to 3.25 by ...
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1answer
51 views

Approximating dynamics in continuous-time with discrete-time

I'm not sure if this is the best place to ask this question, so please direct me to the appropriate community if this question seems out of place here. I am working on a project in which I'm trying ...
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2answers
276 views

Function generator output level drifting

The output level on my BK Precision 4017A function generator is drifting. For example, if I set the output level to 10.0V on a 2kHz sine wave, driving a variety of simple half-wave rectifier and ...
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1answer
1k views

Sine Wave Generator Circuit - Bipolar

I have this sine wave generating circuit working. It is based on an application note from TI (http://www.ti.com/lit/wp/snoa839/snoa839.pdf). we are driving an inductive sensor with a 2KHz sine wave, ...
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1answer
394 views

How to invert a digital signal from operational amplifier [closed]

I have built myself a simple square wave generator with an operational amplifier and it works grea, but I want a second one with an inverted output. Are there high voltage Logic OR gates ?
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205 views

What is the purpose of this RF sweep oscillator circuit section

I'm on a (very) long and arduous journey to build a RF sweep generator for tuned circuit filters. After much experimentation with free running LC oscillators, I conclude that for this application (...
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1answer
326 views

Locked-Sync Sine Generator Covers Three Decades with Low Distortion

I am working on my first project in analog/board design, and although I know a decent amount of theory in electronics, I am lacking in practical experience. I need an exact sine wave generator, and ...
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1answer
72 views

Avalanche Breakdown Noise as digital input

I am trying to develop a true random number generator using reverse biased transistors avalance breakdown noise as a input for pic microcontroller. How can i turn the noise in to a digital input ? Is ...
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2answers
209 views

True Random Number Generator by using avalanche breakdown

I am trying to build a TRNG using avalanche breakdown for randomness. I am developing a circuit as looks like this.(https://web.jfet.org/images/rng-circuit.gif) Before I complete the circuit i ...
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1answer
747 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 ...
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2answers
109 views

What switch would replace a series of 6 pins linked by jumpers?

I've bought a small electronics kit - a function generator which produces a 1kHz signal in various waveshapes - square, sine, triangle and integrator. It's a basic kit on a single PCB (555 timer based)...
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1answer
93 views

Why can't I connect 2 signal generators in series? [closed]

I am about doing a laboratory about signal generators, and there is a question which 50% the people I talk say "Yes", and other 50% say "No". Is it possible to connect 2 signal generators? If you'...
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1answer
112 views

Function Generator - Signal without Neg or Gnd reference

I have a new PC based function generator (very cheap), and an old BK Precision function generator. The old BK Precision can output a signal without the ground or negative reference lead from the BNC ...
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5answers
1k views

Why do TTL pulse generators generate an asymmetrical square wave (unlike CMOS)?

I've read that the asymmetrical (about 1/3 mark-to-space) output waveform is due to input gate characteristics of a TTL inverter, but I want to know more about which characteristics of the TTL input ...
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4answers
2k views

What is causing this Op-Amp Distortion

I am new to analog electronics and I am still learning about op amps. I am driving an 8ohm 15 watt speaker with just an op amp and my phone. What I do not understand is that I have a dual supply, 10V ...
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1answer
237 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 ...
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2answers
357 views

Using amplifier to drive an electromagnet

my group-mate and I are currently trying to create a kind of a simple speaker which could vibrate up to 1 kHz. The speaker we designed was simply made up of small solenoid and a cylindrical magnet, we ...
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2answers
97 views

Function generator for OFDM signal

I have been simulating analog circuits where the input resembles an OFDM signal, but with lower frequencies. Right now I am generating the input signal with MATLAB. I now want to have a physical ...
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2answers
974 views

Amplitude drop as frequency increases on function generator

As I increase the frequency on my function generator, the amplitude of the transmitted wave decreases. Is this to be expected? Or is there an issue with my function generator?