Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Patent
1998-04-02
1999-09-07
Wells, Kenneth B.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
327159, 331 17, 331DIG2, H03L 706
Patent
active
059492635
ABSTRACT:
A known phase-control loop comprises an oscillator having a controllable frequency, a frequency divider and a phase comparator which compares a reference signal (CKREF) with the signal at the output of the frequency divider and controls the frequency of the oscillator.
The circuit also comprises, at the output of the oscillator, a phase shifter which supplies a signal (CKN0) at a multiple frequency of the input frequency and shifted in phase with respect to the signal of the oscillator, and a synchronizing module which may be simply constituted by a D flipflop with the input D connected to the output of the divider, and the input CLK connected to the output of the phase shifter, and which supplies a signal (CKREF0) at the frequency of the input signal (CKREF) but is locked at the output signal of the phase shifter.
REFERENCES:
patent: 4351001 (1982-09-01), McGinn et al.
patent: 5036297 (1991-07-01), Nakamura
patent: 5452325 (1995-09-01), Brown
patent: 5565928 (1996-10-01), Saeger
patent: 5777498 (1998-07-01), Cometti
Nguyen Hai L.
U.S. Philips Corporation
Weighaus Brian J.
Wells Kenneth B.
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