Power-on reset circuit responsive to a clock signal

Details Power-on reset circuit responsive to a clock signal Power-on reset circuit responsive to a clock signal

1993-03-17

1995-01-31

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

377128, 327 26, 327 78, 327 94, 327335, H03K 1722

Patent

active

053861523

ABSTRACT:
A power-on reset circuit includes a differentiator circuit, a sample-hold circuit and a reset signal generating circuit. The differentiator circuit differentiates a clock signal from an oscillator after a power supply is applied to a power supply terminal. The sample-hold circuit samples a power component only from the output of the differentiator circuit. When the power component exceeds a threshold voltage of the reset signal generating circuit, the reset signal generating circuit generates and provides a reset signal for a logic circuit during a certain period.

REFERENCES:
patent: 4434403 (1984-02-01), Chang
patent: 4464584 (1984-08-01), Hentzschel et al.
patent: 4518865 (1985-05-01), Iwasaki
patent: 4900950 (1990-02-01), Dubujet
patent: 5159217 (1991-07-01), Mortensen et al.
IBM Tech. Discl. Bultn. "Microprocessor Monitor and Reset Circuit", Jul. 1986, vol. 29 #2, p. 611.

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