Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2007-04-10
2007-04-10
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S149000
Reexamination Certificate
active
10955469
ABSTRACT:
A DPC (200) that includes: a frequency source (20); a delay-locked loop (220) for receiving a clock signal and generating a plurality of phase-shifted clock signals; a control device (280) having a DPS (282) and a DAC (284) for receiving an input signal identifying a desired frequency for a synthesized signal; a selection circuit (270) for receiving the plurality of phase-shifted clock signals, selecting a sequence of the phase-shifted clock signals and outputting a coarse synthesized signal; a variable delay cell (290) having a first input coupled to the selection circuit to receive the coarse synthesized signal and a second input coupled to the control device for receiving a fine tune adjustment signal to modify the coarse synthesized signal to generate the synthesized signal (292) having substantially the desired frequency. The DPC further includes training apparatus for calibrating the DPC.
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Charaska Joseph A.
Gabato, Jr. Manuel P.
Gailus Paul H.
Callahan Timothy P.
Cox Cassandra
Davis Valerie M.
Motorola Inc.
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