Phase-locked loop

Details Phase-locked loop Phase-locked loop

2006-03-28

2006-03-28

Chin, Stephen (Department: 2634)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C327S156000

Reexamination Certificate

active

07020229

ABSTRACT:
A phase-locked loop is described and has a phase detector that provides at its output per clock cycle a current pulse whose pulse duration is a measure of a phase difference between an input signal and an output signal of the phase-locked loop. A loop filter is connected downstream of the phase detector. The loop filter has a converter device, at least one controllable switching device and at least two switchable capacitive elements for storing a current pulse. In which case the converter device, the switching device and the capacitive elements can be connected up in such a way that the converter device provides a proportional current from a current pulse coupled into at least one of the capacitive elements. An amplitude of the proportional current is constant over the entire length of a clock period. An oscillator is connected downstream of the loop filter, into which oscillator the proportional current can be coupled.

REFERENCES:
patent: 3870971 (1975-03-01), Takahashi et al.
patent: 4694261 (1987-09-01), Ewen et al.
patent: 4987387 (1991-01-01), Kennedy et al.
patent: 5021749 (1991-06-01), Kasai et al.
patent: 5144156 (1992-09-01), Kawasaki
patent: 5373255 (1994-12-01), Bray et al.
patent: 5382922 (1995-01-01), Gersbach et al.
patent: 5598405 (1997-01-01), Hirose
patent: 5724008 (1998-03-01), Ferraiolo et al.
patent: 6008693 (1999-12-01), Heinke
patent: 6028905 (2000-02-01), Gaines
patent: 6211743 (2001-04-01), Rhee et al.
patent: 6282249 (2001-08-01), Tomesen et al.
patent: 2002/0008589 (2002-01-01), Lanoman et al.
patent: 0 072 751 (1983-02-01), None
Tietze/Schenk: “Halbleiter-Schaltungstechnik” [electronic circuits],11thed., Springer Verlag, Berlin, pp. 1284-1285, and corresponding English translation from the 9thed., pp. 860-861.

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