Extremely low power zero crossing circuit

Details Extremely low power zero crossing circuit Extremely low power zero crossing circuit

1994-03-24

1995-05-16

Stephan, Steven L.

Electricity: power supply or regulation systems

Output level responsive

Zero switching

323236, G05F 110

Patent

active

054164044

ABSTRACT:
A circuit for operating relay contacts is based upon the utilization of an AC line zero voltage to provide a relay contact closure. The circuit is inexpensive and draws extremely low current levels. The circuit involves a latching arrangement of gates responsive to a zero crossing detector and a Delay Time output from a sensor. The gating circuits function in a latching arrangement which has an adjustable output to energize a relay and in turn provide for the closing of contacts which occurs substantially at zero voltage.

REFERENCES:
patent: 3890562 (1975-06-01), West
patent: 4574200 (1986-03-01), Racca et al.
patent: 4626698 (1986-12-01), Harnden, Jr. et al.
patent: 4864157 (1989-09-01), Dickey
patent: 5072170 (1991-12-01), Crane et al.
patent: 5267120 (1993-11-01), Graff et al.

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