Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2006-08-08
2006-08-08
Callahan, Timothy B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S269000
Reexamination Certificate
active
07088158
ABSTRACT:
A digital multi-phase clock generator includes a reference clock input and first and second digitally-programmable delay lines. The first and second delay lines are coupled in parallel with one another, in series with the reference clock input. Each delay line includes a delay control input. The first delay line has a plurality of phase outputs which are synchronized with the reference clock input and have different phases from one another. The generator further includes a phase detector and a delay control circuit, which are coupled with second delay line to form a phase-locked loop. The delay control circuit has a digital delay control output, which is coupled to the delay control inputs of both the first and second delay lines. The phase-locked loop adjusts delay through the first and second delay lines to lock a phase of an output of the second delay line to a phase of the reference clock input.
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patent: 2006/0017479 (2006-01-01), Kim
Block Stefan G.
Reuveni David R.
Callahan Timothy B.
LSI Logic Corporation
Luu An T.
Westman Champlin & Kelly
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