INSULATING SWITCH, BIDIRECTIONAL INSULATING SWITCH, INSULATING SWITCHING CIRCUIT, BIDIRECTIONAL INSULATING SWITCHING CIRCUIT, THREE TERMINAL INSULATING SWITCHING CIRCUIT, THREE-TERMINAL BIDIRECTIONAL INSULATING SWITCHING CIRCUIT, MULTI-TERMINAL SWITCHING TYPE BIDIRECTIONAL INSULATING SWITCHING CIRCUIT, AND ELECTRONIC IGNITION DISTRIBUTION CIRCUIT

摘要

PURPOSE: To unconditionally provide one of the above mentioned circuits, etc., with an isolation function. ;CONSTITUTION: The 1st to 4th controllable unidirectional switches are constituted of connecting one by one diodes 11 to 14 to the drains of a PMOS 1, an NMOS 2, a PMOS 3, and an NMOS 4 e.g. both the sources of the PMOS1 and the NMOS 2 are mutually connected, the 3rd and 4th unidirectional switches are serially connected to a DC power supply 7 in the same direction so that both the sources of the PMOS 3 and the NMOS 4 hold the power supply 7 between, and when the 3rd and 4th unidirectional switches turn on a closed circuit for controlling to turn off the PMOS 1 and the NMOS 2 is constituted. Simultaneously the DC power suply 7 constitutes a closed circuit for charging a capacitor 10, and when the 3rd and 4th unidirectional switches are off, the capacitor 10 constitutes a closed circuit for biasing the PMOS 1 and the NMOS 2 in the forward direction. Consequently the isolation insulating function can be unconditionally obtained independently of the on/off of the PMOS 1 and the NMOS 2.;COPYRIGHT: (C)1994,JPO&Japio