Sawtooth Wave Generator

[Paul Price]

This video also fails to resolve the requests of the original poster, since this simple circuit, ( just one of so many simple relaxation oscillator circuits that are easy to find on Youtube and the web,) does not generqte a linear ramp sawtooth but instead an exponential ramp, and fails to help the request of the original poster to control duty cycle.

Misdirection.

[T3sl4co1l]

You can save the cost of one component, and obtain a linear ramp to boot, if you replace the battery with a constant current power supply.

Hey, just because a battery or the wall outlet doesn't happen to be "constant current", doesn't mean it's not theoretically equally valid...

Tim

[ArjunSukumar]

how to design a howland intergrator circuit?
any text book reference for that?

[SteveLy]

how to design a howland intergrator circuit?
any text book reference for that?

Not sure about the "Howland" bit but op-amp integrators are described in most uni level electronics texts, e.g., Millman & Halkias; I've attached the relevant pages, see sec. 16-4 for the integrator. (You can find the full textbook at archive.org; it's public domain. Same goes for Horowitz & Hill's "Art of Electronics".)