Phase-locked loop structures with enhanced signal stability

Details Phase-locked loop structures with enhanced signal stability Phase-locked loop structures with enhanced signal stability

2007-08-28

2007-08-28

Ha, Dac V. (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C375S375000, C375S376000, C327S149000, C327S156000

Reexamination Certificate

active

10717394

ABSTRACT:
Phase-locked loop structures are provided that facilitate enhanced stability of loop-generated signals. They include an oscillator network, a feedback loop and a controller. The oscillator network generates a loop output signal with a frequency that varies in response to a control voltage and to a frequency-determining parameter, the feedback loop generates the control voltage in response to the loop output signal and a reference signal and the controller increments the frequency-determining parameter to maintain the control voltage within a predetermined control-voltage range. These structures enhance signal stability by facilitating the use of low-gain oscillator structures and they simplify and shorten loop operations because the structures operate in a closed-loop condition at all times.

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