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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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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
137 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
100 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
63 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
52 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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68 views

Testing function generator with multimeter

I bought a used signal generator today. I want to check if it works with no problem but I don't have access to an oscilloscope right now. I have a multimeter that can measure dc and ac voltage and ...
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201 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
155 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
279 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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1answer
82 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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1answer
47 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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29 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
156 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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0answers
58 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
269 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
163 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
124 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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238 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
46 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
233 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
903 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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95 views

Dual channel vs more Frequency Function generator?

I am a computer engineering student, totally new electronics. So far, I have been more inclined toward the software aspect of CE but now I am planning to change that. So I decided to buy some devices ...
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1answer
308 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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1answer
147 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
306 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
68 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
163 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
555 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
92 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
87 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
93 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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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
189 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
281 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
87 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
668 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?
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0answers
43 views

Input across RC circuit is not showing a square wave though the input is a square wave [duplicate]

I wanted to observe the transient response of the capacitor so applied a square wave of 205mHz from a function generator as that would allow complete charging and discharging for the capacitor in the ...
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2answers
278 views

RC circuit charging and discharging by square wave not giving a square wave across input on oscilloscope [closed]

question shifted to Input across RC circuit is not showing a square wave though the input is a square wave as it was unclear
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0answers
112 views

Programmable GHz signals

I would like to generate custom waves in the gigahertz range. With beginner FPGAs like the DE0-Nano or microcontrollers like the Arduino, I can only generate waves up to the kilohertz range. What ...
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1answer
828 views

Circuit to increase current of arbitrary waveform generator

I am trying to create a setup for some Physics experiments - so my background is Physics, not Electrical Engineer that can do circuit design. But I can put a circuit together. I need to amplify the ...
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2answers
387 views

Is there a way to add a tracking generator to a spectrum analyzer?

As the question suggest, is there a way to add an external tracking generator to a spectrum analyzer which doesnt have a tracking generator? Specifically speaking the HP 8564e spectrum analyzer ...
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0answers
89 views

Setting up a sonar transducer, the TC-3027 to measure distance

I will first attach some pictures of the sonar, its datasheet, and then a sample setup from another project. Datasheet My goal is to use one sensor, to send and receive signals. I have an ...
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2answers
252 views

Will a purely inductive load damage my function generator?

Will an inductive load damage my function generator? Will the circuit I'm designing damage my function generator shown below. I'm using this function generator which has an output impedance of 50 ...
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1answer
82 views

High negative voltages with op-amp

I am working on a project in which a very high negative voltage is required. I have the following equipment DC power supply with max output voltage of 300V Function generator with a maximum peak-to-...
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0answers
156 views

Powering a 8ohm 4W speaker with only a function generator, breadboard, and resistors

We're working on a school project and have limited resources. We're trying to power a Quam Nichols 3" speaker without an amplifier circuit. The project only requires the coil to drive but actual sound ...
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1answer
111 views

Rigol Arbitrary Waveform Generator DG1022Z and Square Signal Sample Rate

I have generated simple arbitrary function which represent UART message, but I'm having trouble when it comes to decoding it on oscilloscope. The reason for that is because my 0 and 1 at frequency ...
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0answers
426 views

XR2206 Signal generator amplifier

Probably a silly question but I'm still a total noob on electronics. I got my hands on an old non-functional XR2206 based function generator and I wanted to bring it back to life and in the meantime ...
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1answer
306 views

Impedance of BNC vs output impedance of function generator

I'm a bit confused on output impedance of function generator and coaxial cable impedance. Consider a function generator with output impedance of \$50 \Omega\$. Suppose that I connect to it a BNC \$...