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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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 ...
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135 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 ...
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113 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 ...
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63 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 ...
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34 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. ...
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118 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 ...
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25 views

Function Generator Driving Multiple Outputs

I am characterizing a solenoid (valve) and I am using a function generator as the control signal on a BJT to turn on/off the solenoid. I can generate the pulses I need but I need the same control ...
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62 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 ...
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78 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 ...
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263 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.
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82 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 ...
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43 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 ...
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103 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 ...
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58 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 ...
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104 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 ...
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99 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 ...
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68 views

Which Ground Should I Use for my Function Generator Circuit

The broad question is, which ground should I use for my function generator and why. Some background, I'm trying to build a function generator based on the XR2206 IC. I've looked at a few circuits at ...
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88 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, ...
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248 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 ...
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41 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 ...
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129 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 ...
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88 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 ...
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919 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 ...
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130 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 ...
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179 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. ...
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187 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 ...
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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 ...
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200 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 ...
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186 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 ...
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292 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.
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549 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) ...
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379 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 ...
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597 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 ...
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108 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?
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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. ...
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352 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 ...
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153 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 ...
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810 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 ...
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466 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 ...
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320 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 ...
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147 views

Calculate the transfer function [duplicate]

I have a question about this circuit.What is the transfer function for this circuit?
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Internal resistance of Function Generator

I'm using a function generator that has a 50ohm internal resistance. Does this affect any circuit that I may connect it to and if so, how would it affect the results?
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244 views

Current flow through resistor in as current

While I was working in an AC current lab, I used a very simple circuit. 1 resistor and a wave generator. The voltage was about 3V (RMS) and the resistance 1.173 kohm. According to Ohm's law i.e. V=IR ...
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4k views

Should the output impedance of a function generator be high or low?

As we know, \$R_{load}\$ should be greater than \$R_s\$ on a function generator to avoid loading effect. Does it mean that the output impedance of the function generator should be lower?
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711 views

AC and DC voltage are constant even though the frequency changes

In the circuit below, why does the AC voltage remain constant even though the frequency increases?
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611 views

LM348 replacable by LM358

I want to give SMD soldering a try and therefore I was looking for some useful circuit (no LED-blink-crap) I could build more or less easily. So I found a nice DIY function generator here. It uses ...
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620 views

What is output amplitude of Direct Digital Sythesizers as AD9850?

By looking at AD9850 DDS or other similar parts made by Analog Devices Company it is obvious that the output signal amplitude changes by frequency. This can be shown as x= pi* fout / fClock and ...
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504 views

How to amplify a signal to trigger a function generator?

I have two digital signals, I perform a AND operation on these two signal with an AND gate (TI SN74LS08N), and want to use the output signal to trigger a function generator which will generate another ...
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255 views

Need help setting up sweep function for signal generator

I recently bought a signal generator from Amazon. The model I got was the UDB1205s but I believe my question applies to any of the manufacturer's signal generator in the UDB120x series. A similar ...
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896 views

How to apply the Barkhausen criterion in order to know if a system will oscillate?

How to analyze or apply the Barkhausen criterion for oscillation of the astable multivibrator below? The criterion talks about the magnitude of the products in a loop must be equal to 1 (ideally) ...