CMOS power-on reset circuit

Details CMOS power-on reset circuit CMOS power-on reset circuit

1986-03-20

1988-05-24

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307246, 307585, 307597, 307605, H03K 1722

Patent

active

047468220

ABSTRACT:
A CMOS power-on reset circuit furnishes a reset signal for bringing the components of a circuit to a defined initial state when the common supply voltage is turned on. The output signal of the reset circuit assumes a first constant value as soon as the supply voltage rises above the level required to turn on the pulldown transistor of an initializing inverter in the reset circuit. A delay circuit causes the output signal of the reset circuit to remain at the first constant value for a period of time sufficient to allow the components of the circuit to settle. The output signal of the reset circuit is then forced to a second constant value. The reset circuit is suitable for use with power supply voltages which rise very rapidly or with power supply voltages which rise very slowly (DC sweep).

REFERENCES:
patent: 4300065 (1981-11-01), Remedi et al.
patent: 4446381 (1984-05-01), Dalrymple
patent: 4553054 (1985-11-01), Kase et al.
patent: 4558233 (1985-12-01), Nakamori
patent: 4581552 (1986-04-01), Womack et al.
patent: 4591745 (1986-05-01), Shen

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