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Sawtooth generator with single op-amp

Sawtooth generator with single op-amp

Sawtooth generator with single op-amp

(OP)
Hi everybody

Is it possible to obtain sawtooth signal output from a single op-amp with DC input voltage?
I know that it's possible with 2 op-amps but my aim is to use just one.

Could you recommend any circuit schematic or website?

Thanks a lot.

RE: Sawtooth generator with single op-amp

Maybe an oscillator with a coil at the output to make sloped pulses.

RE: Sawtooth generator with single op-amp

A 555 timer has a pretty good ramp waveform on the timing capacitor (it is reasonably linear since the RC is restricted to just one-third of the rail).

 

RE: Sawtooth generator with single op-amp

A crude method of doing a sawtooth with a single op-amp is to make a square-wave oscillator, run that through a high-value resistor, and into a capacitor. With a high-value resistor, it begins approaching a square-wave driven constant-current source into a capacitor. The R/C is not apparent on a scope.

Now, vary the duty-cycle of the oscillator, and you can make it approach a sawtooth.

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