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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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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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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51 views

Setting the peak or peak to peak output voltage

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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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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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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229 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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117 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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119 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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Calculate the transfer function [duplicate]

I have a question about this circuit.What is the transfer function for this circuit?
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415 views

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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166 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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827 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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accuracy of signal generator is in dB

The accuracy of the signal generator is given ±(2mV + 0.4dB). Does 0.4dB mean error is 10^(0.4/20) of Input amplitude, which will be around 5%?
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225 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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289 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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297 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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295 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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169 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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656 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) ...
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202 views

How to Identify a Power Receptacle

The Wavetek 144 HF frequency generator has an unusual power receptacle that I cannot identify. The link references the manual, which does not name the part. I'm not sure it isn't proprietary. Here is ...
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267 views

Amplitude modulator for a sine wave generator

I have a home made, mostly using the design in a magazine article, radio frequency signal generator, and I would like to be able to modulate (AM) the sine wave output, which is up to 8 MHz, with an ...
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287 views

Why did aliasing occur at a frequency before the Nyquist cutoff?

I sampled frequencies of 400, 500, and 600 Hz at a sampling frequency of 1 kHz. My oscilloscope showed aliasing at 400 Hz, nothing at 500Hz, and then a lot of aliasing at I saw some aliasing ...
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896 views

Design a simple circuit to generate variable +5V to -5V signals

I want to design a simple circuit that takes 12V from a battery and generates two signals each of range -5V to +5V. These signals are input to a 2-Channel ADC. I want to be able to change the voltage ...
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762 views

Power Amplifier for Signal Generator

I am trying to find the operate power amplifier to solve my power needs, I basically have a Function Generator -> Power Amplifier -> Helmholtz Coil Now I am trying to figure out if I get the ...
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992 views

What kind of cable does a function generator use?

I picked up an Agilent 33120A function generator used (yay!) and I need to buy the cable that attaches the output to the circuit. Problem is, I'm not sure what kind of cable it is. So, I guess I ...
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421 views

Impedance for Helmholtz Coil Connected to Audio Amplifier

I am trying to design a Helmholtz coil, that will have an impedance of about 2 ohms (the reason for this being that I am going to hook it up to a audio power amplifier, so to get the same wattage ...
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306 views

How to divide signal level from function generator

I looked for this answer but was unsuccessful so I want to ask the experts here. I have configured an op amp in non-inverting mode (the first in a chain of 3 stages). It is for amplifying extremely ...
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Error caused by Scope or Function Generator?

This question may not be valid, please excuse my ignorance. I am having difficulty measuring a decent square wave at 500kHZ. The image below shows a 4 volt CMOS output with a frequency of 500kHz ...
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2answers
1k 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 ...
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3k views

Oscilloscope/Function Generator with GnuRadio (using very cheap hardware)

I was just getting started with RF signal processing, and I was very interested in being able to make an oscilloscope and function generator work in real time with python. Essentially, I would like ...
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Measuring a soundcard output voltage

I have been experimenting with a Soundcard Oscilloscope and I am having some problems understanding what's going on! I have attached a screenshot of my digital scope setup. My hardware setup is ...
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Simple function generator using microcontroller

Is it possible to make a function generator with a microcontroller (PIC18F4550 OR PICAXE20X2)? I am thinking that for generating square waves it can be enough to make a pin output high and low on ...
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Analog function generator ICs?

Does anyone know of any old-school function generator ICs (similar to the ICL8038 or XR2206) that are still on the market? (i.e. not obsolete / NFFD - I'm not interested in scouring the globe for old ...
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Can I use a subwoofer as a linear actuator?

I need an actuator with a few mm of travel and it has to be very responsive to a very low frequency (DC 10 Hz) sine wave generated by a function generator. I'm thinking of getting a cheap subwoofer ...
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Can you use Oscilloscope probes for a Function Generator?

I just bought a cheap function generator and have no test leads for it. I do have 2 pairs of oscilloscope probes with a 1X-10X switch on them. I am curious to know if I will get the same results with ...
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Calculate Current out of Function Generator

I couldn't find an equation for this on Google/Wikipedia, but does the frequency of a function generator (we'll say that it's a sine wave) impact the current output. Example, if I had a 5 volt source ...