Integrable phase-locked loop including an acoustic resonator
US7345554B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2004 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Mar 4, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J3/22
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.