amplifiers
Power amplifiers that oscillate—deliberately. Part 1: A simple start.
Editor’s Note: This DI is a two-part series. In Part 1, Nick Cornford deliberately oscillates the TDA7052A audio power amplifier to produce a siren-like sound and, given the device’s distortion characteristics, a functional Wien bridge oscillator. In Part 2, Cornford minimizes this distortion and adds amplitude control to the circuit. When audio power amplifiers oscillate,…