Prohibition circuit upon power-on event

Details Prohibition circuit upon power-on event Prohibition circuit upon power-on event

1988-03-28

1989-12-12

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307269, 328 63, H03K 3284, H03K 513

Patent

active

048869848

ABSTRACT:
For preventing a power consuming circuit from undesirable operation upon a power on event, there is disclosed a prohibition circuit operative to produce a control signal supplied to the power consuming circuit for a prohibition of an operation carried out by the power consuming circuit on the basis of an external signal, the prohibition circuit comprises a raw control signal producing circuit operative to produce a raw control signal shifted from an inactive voltage level to an active voltage level after the power switch on event, the raw control signal is shifted from the active voltage level to the inactive voltage level when a power voltage level excesses a certain voltage level, the prohibition circuit further comprises an adjusting circuit responsive to the raw control signal and the external control signal and operative to produce the control signal of the active voltage level when the raw control signal is shifted from the inactive voltage level to the active voltage level regardless of the voltage level of the external signal, and the adjusting circuit continues to produce the control signal of the active voltage level regardless of the voltage level of the raw control signal until the external signal is shifted from an active voltage level to an inactive voltage level.

REFERENCES:
patent: 4736119 (1988-04-01), Chen et al.

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