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.

learn more… | top users | synonyms

2
votes
0answers
135 views

Peculiar noise when observing a square wave

I'm using the following function generator: http://www.farnell.com/datasheets/499058.pdf?_ga=1.129729036.1263433037.1467971694 and a Tektronix TDS 1002B scope for some measurments. Most of the time I ...
0
votes
0answers
27 views

Dropoff in white noise produced by AWG

I have a question regarding white noise generated by an arbitrary waveform generator (AWG). I'm working with one (AWG5014C) that has a sampling rate of 1.2 GSamples, with which I want to produce white ...
0
votes
3answers
61 views

Linear Rise exponential fall pulse generator

For a neutrino detector related experiment, I need to design a circuit which generates the pulse similar to the detector. This is required to test the front end electronics. Here are my final goals: ...
0
votes
2answers
68 views

How to make auto off functionality for an led lamp circuit with only transistor, capacitors, timer 555 chip?

The components I have are timer 555 chip, capacitors, and transitors. I want to create sleep functionality for a led lamp which consists of 6 leds in parallel and pnp, npn transistors. I want this ...
-4
votes
2answers
76 views

Usage of RC oscilators [closed]

Hello everyone I am looking for usage of RC oscilators but sadly I cannot find them anywhere. That is why I decided to post there my question. Please provide an answer for all future users of this ...
0
votes
2answers
75 views

Why is my DC power supply voltage decreasing when I increase my function generator amplitude?

In lab, we are constructing a power amplifier. We built it first in Multi Sim, ran a transient analysis (picture below), built it on a protoboard and then ran it through an oscilloscope to make sure ...
0
votes
1answer
130 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 ...
-1
votes
4answers
160 views

What analog circuit i should use to shifting a signal from -5..5v into 0..10v? [duplicate]

I want to output my circuit from -5..5v into 0..10v. My circuit generate -5..5v. What should i do to generate that signal? what analog circuit i should use? thanks
0
votes
2answers
71 views

How to calculate appropriate value for noise-removal capacitor?

I'm still figuring out analog electronics with my waveform generator project. It has a 9V power supply that I split into +/-4.5V rails with an op amp virtual ground (the subject of an earlier question)...
0
votes
2answers
96 views

Why does the voltage output of a signal generator changes with its frequency setting?

I connected a signal generator to a 5.1 ohm resistor, which may be too low comparing to the internal resistance of the generator, so I got only several hundreds millivolts amplitude for frequencies ...
0
votes
3answers
67 views

Bipolar output from DAC with unipolar supplies

I want to use a unipolar 12-bit DAC (MCP4725) as a function generator with bipolar output (from -2.5 to +2.5V). Problem is, I only have two supplies of +5V and +12V referenced to the same ground, so ...
0
votes
1answer
54 views

How (or if?) to isolate inputs to op amp summer?

I am building a function generator as an exercise. I have a 9V power supply that I split into +/-4.5V. The +4.5V side powers an Arduino that outputs the waveform as a series of 8-bit values on ...
1
vote
1answer
53 views

Function generator output voltage

In a function generator, when I set Zout to be 50 Ohm, and Vpp is 1V. Is this Vsource, or the Vload when I have a matching load of 50 Ohm? simulate this circuit – Schematic created using ...
1
vote
4answers
417 views

High speed (>30KHz) 10-bit PWM generator

I'm looking for a way to generate a high speed PWM signal into a high impedance input gate driver IC. This would be used to replace a lab bench waveform generator. Preferably I would use something ...
-4
votes
1answer
130 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
1answer
69 views

Noob Measurement Mystery

I am taking up electronics and bought some used test equipment. I have been measuring anything and everything, sometimes with unexpected results. Above is one of those cases. The function generator ...
1
vote
2answers
51 views

HP8116A Function Generator Signal Problem

I'm trying to use a function generator HP 8116A and an oscilloscope Tektronix TDS210. When i connect the probe to trigger output of function generator, i can observe the square wave correctly. ...
0
votes
3answers
156 views

Sine wave generator not working?

Can't get sine wave out of this circuit in Proteus. Can you help me, please? I'm suppose to have sine wave generator with range 1 kHz - 200 kHz. While googling came ...
0
votes
1answer
77 views

Adding DC offset control to a function generator

I recently bought the following small hand-held function generator: http://www.velleman.co.uk/contents/en-uk/p371_hpg1.html But unfortunately it doesn't have a DC offset control. What is the easy way ...
1
vote
1answer
97 views

Getting bad square-wave from the function generator

I have a small function generator: http://www.velleman.co.uk/contents/en-uk/p371_hpg1.html And using the following device for DAQ: http://www.mccdaq.com/PDFs/manuals/USB-1208LS.pdf I hook up the ...
1
vote
2answers
821 views

Ramp Generator using op amp

I'm searching for a ramp generator circuit which is using only op amps (I guess I need an integrator & differentiator for that). The output should be like in the image below.
3
votes
1answer
125 views

Sine wave distortion in simple op-amp circuit- bypass capacitor?

I've built a simple unity-gain buffer op-amp circuit from the UCSB lab here, with a 12V power supply and a 1V, 1 kHz input sine wave. simulate this circuit – Schematic created using ...
3
votes
1answer
65 views

Setting up the “Basic Bipolar Output Operation” connection on a DAC08 chip

I have an 8-bit waveform description coming from an FPGA into the DAC, and I want to read the analog output on an oscilloscope. I figured I should implement this setup found in page 11 of the data ...
1
vote
4answers
112 views

What is the low limit of today's power supply voltage generation and voltage amplitude of sinuosid generation?

Voltage is not really generated, current is, but let me use this colloquial term. What is limitation for generating electrical voltage very low (DC power supply)? What voltage is the real low limit ...
1
vote
1answer
71 views

function generator

simulate this circuit – Schematic created using CircuitLab First, I set the output terminal of function generator to 50ohm and output voltage amplitude to 8Vp-p. Then I change the terminal to ...
1
vote
1answer
234 views

Advantages on using a function generator against a multi-pulse generator by using a 555

I have designed a noise and interference reduction block. When I was going to test it by mounting the system in the lab, my professor told me that I could test it by creating a source of 50Hz by using ...
0
votes
1answer
140 views

DDS with AD9833 and Microcontroller

I'm working on a two channel DDS function generator for a project. I have done some research and I want to use the AD9833 IC controlled with a Microcontroller, an Atmel chip if possible since I have ...
1
vote
1answer
96 views

7W IC amplifier

I have a 7W Audio Amplifier IC Module. It's instruction says power input should be 12~16 Volts. The audio source should be connected to "IN" and "G". Output should be a 7W Speaker to "SPK". In lab, I'...
3
votes
2answers
399 views

Simple function generator: is current-limiting/short circuit protection/impedance matching necessary?

I have designed a function generator with the intent to provide test signals to a microcontroller or ADC of some other device. However, I may forget that a year down the line and plug it into some ...
0
votes
1answer
44 views

Question about function generator's arbitrary waveform generation ability [closed]

I want to buy a function generator with arbitrary waveform generation ability for lab use. My question is, can arbitrary waveform generation's capability generate one sine wave(act as noise) rides on ...
0
votes
2answers
272 views

Voltage drops when a signal is fed into op-amp comparator

I have a function generator SFG-2110 from GW Instek. I set it to generate a square wave with max/min of aroudn +- 1 V. And I checked with an oscilloscope. However, when I connected outputs of the ...
0
votes
2answers
107 views

What makes an arbitrary waveform generator arbitrary?

Why are some signal or waveform generators called "Arbitrary Waveform Generators"? Am I misunderstanding the word arbitrary? This question is not necessarily about the word arbitrary but more about ...
0
votes
4answers
2k views

Function generator as a DC power supply

I'm wanting to start my own lab at home so that I can learn things faster than uni teaches (we're not allowed into labs unless we're in our own lab). A friend said that I'd be better off getting a ...
1
vote
1answer
146 views

can I use function generator as electrocutaneous

I am looking to build a electrocutaneous system to stimulate tactile sensation. I researched and find we need to provide current wave of ~2mA ~0.2ms ~200Hz. Can I build a function generator with ...
0
votes
2answers
240 views

Low frequency low voltage Sine wave generator

I want to build a low frequency (around 10 Hz) and low voltage (about 3V) sine wave generator to drive an electro magnet. It would be very helpful, if you can suggest few efficient ways of doing this.
1
vote
1answer
279 views

How to use an oscilloscope with a function generator?

I am taking a digital electronics class and I am utterly confused. I am using Multisim to design circuits, and for one of my labs I had to use a function generator with a oscilloscope. Here is a ...
0
votes
2answers
78 views

signal generator - circularly polarised

I am testing some hardware in lab that computes the four Stokes parameters. To test the hardware, I want to generate circularly polarised sine wave. Provided the frequency is high enough (above ~100 ...
2
votes
3answers
243 views

Active signal generator IC for 100kHz [closed]

I am trying to get an IC to generate a 100kHz sinusoidal waveform for my circuit. However when I google, all I can find are retired products which make me very hard to find (I stay in Singapore) so ...
0
votes
2answers
254 views

square wave generator on 20MHz

I need a circuit that generates rectangular waves. It shouldn't be lo-hi-lo-hi, but a random sequence of lo-hi-hi-hi-lo-lo is needed. It also has to oscillate like that, at at least 20MHz. I don't ...
0
votes
2answers
340 views

Why is the output of wien bridge oscillator sinusoidal?

I have been studying Wein Bridge Oscillator for a function generating project. I am curious how output of the oscillator is always sinusoidal. A rigorous mathematical reasoning would be great.
2
votes
4answers
733 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) ...
0
votes
1answer
460 views

sine wave generator circuit with OPA604 and LM3900

I am trying to generate a sine wave signal. I am following this guide http://www.ti.com/lit/ml/sloa087/sloa087.pdf from TI. The thing is I cannot find the IC that they are using (TLV2471) and I only ...
1
vote
2answers
973 views

How to drive 1MHz Ultrasonic Transducers

I have 2 ultrasonic transducers (see below picture) facing each other with spacing of 10cm (adjustable). I would like to supply 1 MHz sine wave (from function generator) to one transducer (...
-1
votes
2answers
122 views

Setting the peak or peak to peak output voltage [closed]

Can the peak or peak to peak output voltage of a function generator be set without the aid of auxiliary instrument such as DMM or Oscilloscope?
0
votes
4answers
124 views

Impedance mismatch

When I connect an oscilloscope to a function generator use both oscilloscope cable (one connect to the scope and one connect to the FG), I got 700mVpp when outputing a sine wave of 1Vpp and 10kHz. ...
0
votes
2answers
460 views

Using XR2206 function generator with split supply

I have an Exar XR2206 to generate triangle wave with single supply Vcc. This wave has peak value 12 volt and 0 volt. How to make this IC operate in split-supply? Hence I got triangle wave with peak ...
0
votes
2answers
202 views

Series RLC measurement result different with theory

I am measuring the current and voltage in simple RLC circuit: However,the result that I measured show big difference with the simulation result using Multisim. Why is there are a big difference ...
1
vote
2answers
1k views

How to design an square wave Oscillator Circuit with 1-20 MHz range?

I need a circuit that will generate square waves in a range of 1 to 20MHz. The circuit also should be adjustable in a scale of 0.05MHz for each step. There is no need for adjustments during the ...
0
votes
2answers
620 views

How does this circuit produce a triangular-wave output?

I came across this circuit and can't see how it works. I have never really dealt with any operation amplifier circuits that make use of positive feedback, so that only worsens the problem. It ...
1
vote
1answer
385 views

Meaning of maximum load function generator can drive

For example, if a function generator has a minimum load of 1kohm and a maximum load of 50Mohm, if we connect less than 1kohm, the output amplitude will distort. But what happens to the output ...