Interleaved pulse-extended phase detector

Details Interleaved pulse-extended phase detector Interleaved pulse-extended phase detector

2006-10-24

2006-10-24

Tran, Khanh (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

Reexamination Certificate

active

07127021

ABSTRACT:
A mechanism for dealing with faster clock speeds by increasing the pulse width of the pump-up and pump-down pulses of a Hogge-type phase detector without dividing the clock. In particular, the NRZ data stream is divided into two, interleaved data streams which are provided through two series of flip-flops. By connecting the exclusive-OR gates separately to the two series of flip-flops to generate the pump-up and pump-down pulses, a longer time between transitions can be achieved by having alternate transitions (up and down) used by the two different series of flip-flops. In addition, delay circuits are provided to compensate for the clock-to-data output delay of the flip-flops.

REFERENCES:
patent: 5307028 (1994-04-01), Chen
patent: 5731723 (1998-03-01), Chen
patent: 2002/0154722 (2002-10-01), Djahanshahi et al.

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