Single LT1228 Based Electronically Controllable Sawtooth Generator

Abstract

The simple sawtooth generator is presented in this article. The circuit uses three actives (LT1228, NOT gate; CD4009, and NMOS) and passive (a capacitor and two resistors) elements. Electronically adjusting the generator's frequency can be independently achieved by the current bias (I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">C</sub> ). Besides, the sawtooth waveform's amplitude can be tuned via the electronic method, which R <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> > 100k. The simulated results are consistent with the theory analysis.