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:
Aug. 19, 2014
Filed:
Jun. 11, 2009
Applicants:
Francesco Piazza, Bioggio, CH;
Claudio Cantoro, Cornaredo, IT;
Inventors:
Francesco Piazza, Bioggio, CH;
Claudio Cantoro, Cornaredo, IT;
Assignee:
QUALCOMM Incorporated, San Diego, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 1/00 (2006.01); H03H 11/12 (2006.01);
U.S. Cl.
CPC ...
H03H 11/1291 (2013.01);
Abstract
An apparatus to control a tuneable Gm-C filter, including and a filter that can be reconfigured as a free running oscillator by toggling the feedback sign of an output amplifier (), a digital controller (), sensitive to the output of the filter in the calibration configuration, and a DAC () to provide an analogue control signal () to the gm inputs of the transconductance amplifiers () composing the filter.