Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Phase shift by less than period of input
Patent
1995-09-11
1999-06-29
Cunningham, Terry
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Phase shift by less than period of input
327 3, 327 12, 327276, H03K 300
Patent
active
059173564
ABSTRACT:
A phase detector circuit receives both a reference clock signal and a sense clock signal and produces a synchronization signal if the sense and reference clock signals are in phase within a specified tolerance. A lead/lag signal is provided to a skew control circuit and accompanying delay circuits to increase or decrease the amount of delay on the reference clock signal and the sense clock signal if the two signals are not in phase within the specified tolerance. The sense clock signal is a feedback signal returned from logic circuitry, which originally receives the reference clock signal, which may be supplied by a master clock signal within a processor.
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"Clock-skew Chip Targets 66-MHz Designs," Electronic Engineering Times, May 17, 1993, p. 14.
Casal Humberto Felipe
Li Hehching Harry
Nguyen Trong Duc
Cunningham Terry
International Business Machines Corp.
Kordzik Kelly K.
McBurney Mark E.
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