Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Reexamination Certificate
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.
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Lindner Manfred
Scheidler Dirk
Chin Stephen
Greenberg Laurence A.
Infineon - Technologies AG
Locher Ralph E.
Lu Jia
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