Phase-locked loop circuit with switched-capacitor...

Details Phase-locked loop circuit with switched-capacitor... Phase-locked loop circuit with switched-capacitor...

2006-02-28

2006-02-28

Nguyen, Linh My (Department: 2816)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C327S148000

Reexamination Certificate

active

07005928

ABSTRACT:
A phase-locked loop circuit provides an output signal having a frequency depending on the frequency of a reference signal. The circuit includes a feedback circuit that derives a feedback signal from the output signal, a phase frequency detector that provides a control signal indicative of a phase difference between the reference signal and the feedback signal, a control circuit that controls the frequency of the output signal according to the control signal, and a conditioning circuit that conditions the control signal through a conditioning signal. The conditioning circuit includes a storage circuit that stores energy provided by the control signal and the conditioning signal during a first phase and transfers the accumulated energy to the control circuit during a second phase.

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