Patent ID: 6369640
Filing Date: 2002-04-09
Classification: H02M,H03K

Abstract:
A monolithic structure of a zero crossing control circuit of a bidirectional switch including two transistors of complementary types connected in parallel between a gate of the bidirectional switch and a main reference terminal of the bidirectional switch, the gate of the bidirectional switch being connected to a control source via a first resistor, and control terminals of the transistors being connected to a second main terminal of the bidirectional switch via a second resistor of high value, a current path of a first zener diode being interposed between the second resistor and each of the control terminals according to a biasing constructed and arranged to turn on each of the transistors when the zener threshold is exceeded, wherein the control circuit is formed in a same semiconductor substrate of a first conductivity type as the bidirectional switch.