PLL synthesizer having a reset circuit

Details PLL synthesizer having a reset circuit PLL synthesizer having a reset circuit

1996-09-24

1999-04-20

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

331 1A, 331 8, 331 25, 327 12, 327159, H03L 7089

Patent

active

058960660

ABSTRACT:
A PLL including a phase comparator, a VCO, and a charge pump further includes a reset circuit. The reset circuit detects whether both of the charge pump transistors are in an ON state, and if so, generates a reset signal which inhibits the UP and DOWN signals generated by the phase comparator. The reset circuit includes first and second detection circuits and a signal generating circuit.

REFERENCES:
patent: 3469198 (1969-09-01), Madsen
patent: 4105947 (1978-08-01), Crowley
patent: 4156855 (1979-05-01), Crowley
patent: 4940952 (1990-07-01), Kegasa
patent: 5057793 (1991-10-01), Cowley et al.
patent: 5095287 (1992-03-01), Irwin et al.
patent: 5534821 (1996-07-01), Akiyama et al.

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