Power-On-Reset (POR) circuit

Details Power-On-Reset (POR) circuit Power-On-Reset (POR) circuit

1987-02-12

1988-11-29

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307362, 307296R, 307601, H03K 5153, H03K 1722

Patent

active

047884622

ABSTRACT:
A Power-On-Reset (POR) Circuit compares a logic supply voltage to a reference voltage and provides a logic voltage validity signal if the logic voltage is greater than the reference voltage; the circuit delays, on startup, the validity signal for a selected period and then provides a drive signal for driving a solid-state switch which provides an open circuit on the presence of the drive signal, indicating logic voltage validity, and a short circuit in its absence, indicating invalidity; and the circuit immediately disables the drive signal if the logic voltage falls below the reference voltage. The selected start-up delay period is independent of the supply voltage magnitude.

REFERENCES:
patent: 3365586 (1968-01-01), Billings
patent: 4260907 (1981-04-01), Winebarger
patent: 4434403 (1984-02-01), Chang
patent: 4473759 (1984-09-01), Mahabadi
patent: 4611126 (1986-09-01), Miller
L. A. Blue et al., Automatic Restart for Microprocesesors, IBM Tech. Disc. Bull., vol. 26, No. 10A, Mar. 1984, pp. 5319-5320.

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