The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2009
Filed:
Dec. 23, 2005
Michael L. Frank, Menlo Park, CA (US);
Michael L. Frank, Menlo Park, CA (US);
Avago Technologies Wireless IP (Singapore) Pte. Ltd., Singapore, SG;
Abstract
Variable-frequency oscillators incorporating thin-film bulk acoustic resonators (FBARs) are described. In one aspect, a variable-frequency oscillator includes a first oscillator circuit and a second oscillator circuit. The first oscillator circuit includes a first film bulk acoustic resonator that has a first resonant frequency. The second oscillator circuit is coupled to the first oscillator circuit and includes a second FBAR that has a second resonant frequency different from the first resonant frequency. At least one current source is coupled to the first and second oscillator circuits and is operable to supply a total current. A bias circuit is operable to apply to the first and second oscillator circuits respective biases that control apportionment of the total current to the first and second oscillators.