Three-phase thyristor trigger circuit based on AVR single-chip computer

This paper gives an introduction on digit phase shift trigger circuit that can be applied to three-phase thyristor trigger circuit or inverse circuit. The core of the circuit based on AVR (Atmega128) single-chip microcomputer. Trigger pulses that it produces is high stable, reliable. And, it doesn't need the simultaneous synchronous transformer. The paper makes a detailed description of work on the principle and key problems. The practice proves that the circuit is simple and stable. The antijamming ability is strong.