Patent ID: 7345554
Filing Date: 2008-03-18
Classification: H03B,H03J,H03L

Abstract:
1. A phase-locked loop that can be integrated into a semiconductor product, comprising: 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; an oscillator circuit generating a predefined frequency to be controlled, including a BAW-type acoustic resonator having a resonant frequency and an antiresonant frequency; and a dividing block having an input receiving the oscillating signal and an output connected to said second input of said phase comparator; wherein said BAW-type acoustic resonator is associated with a first inductive partner element set in a vicinity of said resonant and antiresonant frequencies and is also associated with a second adjustable capacitive partner element to allow setting of said acoustic resonator's characteristics to provide a high quality coefficient for said acoustic resonator.