Integrable phase-locked loop including an acoustic resonator

Details Integrable phase-locked loop including an acoustic resonator Integrable phase-locked loop including an acoustic resonator

2004-12-29

2008-03-18

Kinkead, Arnold (Department: 2817)

Oscillators

Electromechanical resonator

C331S167000, C331S1170FE, C331S1170FE, C331S17700V

Reexamination Certificate

active

07345554

ABSTRACT:
A phase-locked loop that can be integrated into a semiconductor product comprises: a phase comparator having a first input, a second input and an output, said first input receiving a reference frequency; a low-pass filter having an input connected to said output of said phase comparator and having an output generating an electric control signal (Vtune); an oscillating circuit generating a predefined frequency signal to be controlled; a dividing block having an input receiving the oscillating signal and an output connected to said second input of said phase comparator. The oscillating circuit comprises a BAW-type acoustic resonator having first and second resonant frequencies and associated with a first inductive partner element to cancel out said second resonant frequency and with a second capacitive partner element for regulating said first resonant frequency, said at least first resonator component being adjusted via said electric signal (Vtune).

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