Pulse generating circuit for providing a low-noise microprocesso

Details Pulse generating circuit for providing a low-noise microprocesso Pulse generating circuit for providing a low-noise microprocesso

1998-06-12

2000-05-09

Heckler, Thomas M.

Electrical computers and digital processing systems: support

Clock, pulse, or timing signal generation or analysis

Multiple or variable intervals or frequencies

G06F 106

Patent

active

060618043

ABSTRACT:
A pulse generating circuit for producing the clock signal of a microcomputer is improved to reduce the dependence of noise elimination on power supply voltage. Clock pulses from an oscillator are subjected to waveform shaping and then are frequency-divided by a frequency divider circuit. A selector circuit is provided to select the input signal to or an output signal from the frequency divider circuit. A noise eliminating circuit is provided on the output side of the selector circuit. This arrangement makes it possible to generate noise-free pulses over a wide range of operating power supply voltages.

REFERENCES:
patent: 4688205 (1987-08-01), Abiko
patent: 4837643 (1989-06-01), Tierney, III
patent: 4859968 (1989-08-01), Gershon
patent: 5142247 (1992-08-01), Lada, Jr. et al.
patent: 5276661 (1994-01-01), Beg

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