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:
May. 24, 2011
Filed:
Oct. 11, 2005
Ivan Krivokapic, San Diego, CA (US);
Thierry Divel, Varces, FR;
Ivan Krivokapic, San Diego, CA (US);
Thierry Divel, Varces, FR;
ST-Ericsson SA, Geneva, CH;
Abstract
A single sideband mixer circuit includes a voltage controlled oscillator operable a tunable frequency f. The mixer circuit outputs a frequency signal at a frequency f±f. A tracking filter operates to filter the frequency signal and generate a first output signal at the frequency f±f. A resonance frequency fr of the tracking filter is tunable to substantially match the frequency f±fof the frequency signal. The output signal of the tracking filter may be processed by a phase lock loop circuit to generate a control signal for controlling the setting of the tunable frequency fand resonance frequency fr. Alternatively, the output signal of the tracking filter may be divided and the divided signal processed by a phase lock loop circuit to generate the control signal for controlling setting of the tunable frequency fand resonance frequency fr.