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More  Triangle Wave Generators, Signal Generators

Triangle Signal Generator

A Discover Circuits visitor needed a variable low frequency triangle signal generator, which would produce a full 5 volts peak to peak signal using a 5v supply.  I suggested the circuit below.  It uses three rail to rail op Amps (2 LMC6484 dual op Amp packages).  The first circuit produces a clean 2.5v reference voltage.  The second is configured as a classic multivibrator oscillator, whose frequency can be changed using a variable resistor. 

The waveform generated across the oscillator timing capacitor is fairly linear and is restricted to only 1 volt peak to peak.  It swings a half volt above and below the 2.5v reference.  The voltage across the capacitor is then Amplified by the third op Amp by a factor of 5.  The result is a pretty clean triangle signal, which approaches to within a few tens of millivolts of the supply rails.

Click on Drawing Below to view PDF version of Schematic

Triangle Generator Circuit designed by David A. Johonson, P.E.

More  Triangle Wave Generators, Signal Generators

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