Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Reexamination Certificate
2006-05-09
2006-05-09
Vanderpuye, Kenneth (Department: 2638)
Pulse or digital communications
Synchronizers
Phase displacement, slip or jitter correction
C375S373000, C375S374000, C375S375000, C375S376000
Reexamination Certificate
active
07042970
ABSTRACT:
A phase detection apparatus is described for use in a phase lock loop (PLL). The apparatus has a first input for a reference signal, a second input for a loop feedback signal and an output for the phase difference signal. Two D-type flips flops are provided, the first being clocked with the reference signal and the second with the loop feedback signal. The output of the second flip-flop is delayed relative to the first flip-flop, thereby effecting minimal overlap, when using the phase detection apparatus in a fractional- N phase lock loop, of the interpolator activity with that of the charge pump.
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Hunt William
Keaveney Michael
Tuthill Michael
Analog Devices Inc.
Perilla Jason M.
Vanderpuye Kenneth
Wolf Greenfield & Sacks P.C.
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