Periodic signal generators having microelectromechanical resonators therein that support generation of high frequency low-TCF difference signals
US8742854B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2011 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Oct 3, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2009/2415
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A periodic signal generator is configured to generate high frequency signals characterized by relatively low temperature coefficients of frequency (TCF). A microelectromechanical resonator, such as concave bulk acoustic resonator (CBAR) supporting capacitive and piezoelectric transduction, may be geometrically engineered as a signal generator that produces two periodic signals having unequal resonant frequencies with unequal temperature coefficients. Circuitry is also provided for combining the two periodic signals using a mixer to thereby yield a high frequency low-TCF periodic difference signal at an output of the periodic signal generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.