Integrated power-sense circuit

Details Integrated power-sense circuit Integrated power-sense circuit

1990-08-31

1992-07-14

Pellinen, A. D.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307150, H02J 734

Patent

active

051305623

ABSTRACT:
A power-sense circuit for use in an integrated circuit provides an indication when back-up battery power is lost when the integrated circuit main power supply was off. The power-sense circuit is fully integrated within the integrated circuit and includes a battery sensor, a main power sensor, a latch, and an output coupled to the latch which provides a power-sense signal which is at a first binary state when back-up battery power had been lost and a second binary state indicating that main power had been reinstated to the integrated circuit.

REFERENCES:
patent: 4143283 (1979-03-01), Graf et al.
patent: 4366560 (1982-12-01), McDermott et al.
patent: 4451742 (1984-05-01), Aswell
patent: 4463270 (1984-07-01), Gordon
patent: 4645943 (1987-02-01), Smith, Jr. et al.
patent: 4712196 (1987-12-01), Uesugi
patent: 4777626 (1988-10-01), Matsushita et al.
patent: 4914316 (1990-04-01), Rossi et al.

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