Patent ID: 9054699
Filing Date: 2015-06-09
Classification: H03K

Abstract:
1. A switching device of a semiconductor circuit to switch over an active semiconductor circuit by sequentially electrifying redundantly-configured semiconductor circuits, comprising: a monitor unit to be formed integrally with each of the semiconductor circuits; an order setting unit to undergo setting of an order of the semiconductor circuits in the sequence from the largest down to the smallest in per-time variation of a physical characteristic of each monitor unit; a monitor circuit to measure the physical characteristic of each monitor unit and output a switching signal when a relationship in magnitude between a value of the measured physical characteristic and a predetermined threshold value is reversed; and an electrification instructing circuit to electrify the semiconductor circuit with the top of order being set in the order setting unit in an initial status, to thereafter stop electrifying the semiconductor circuit electrified so far each time the monitor circuit outputs the switching signal and to electrify the semiconductor circuit with the next of order being set in the order setting unit.