Phase-locked loop

Details Phase-locked loop Phase-locked loop

2008-05-01

2011-10-18

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C331S1160FE, C331S154000, C331S158000

Reexamination Certificate

active

08040190

ABSTRACT:
A phase-locked loop includes:a variable oscillator connected to a first resonator, said oscillator being able to deliver an output signal at a first output frequency Fout1,a first frequency divider receiving the output signal and able to convert it into a divided frequency signal Fout1
,a reference oscillator connected to a second so-called reference resonator, delivering a reference signal at a low reference frequency Fref, generating an electrical dissipation lower than a microampere,a phase comparator measuring the phase error between the divided frequency signal Fout1
and the reference signal and being able to produce a test signal,a low-pass filter or an integrating circuit able to filter the test signal and able to generate a voltage or a control word designed to control the voltage-controlled or digitally controlled oscillator.

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Ruffieux et al., “A 2.4GHz MEMS-Based Transistor,” IEEE Int'l Solid State Conf., pp. 3-4 (Feb. 2008).
Ruffieux et al., “An agile 2.4GHz MEMS-Based Digital Frequency Synthesizer,” CSEM Scientific Report (May 2007).

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