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. 06, 2013
Filed:
Oct. 21, 2009
Arezou Khatibi, San Jose, CA (US);
Ara Bicakci, San Jose, CA (US);
Rainer Gaethke, San Francisco, CA (US);
Arezou Khatibi, San Jose, CA (US);
Ara Bicakci, San Jose, CA (US);
Rainer Gaethke, San Francisco, CA (US);
QUALCOMM, Incorporated, San Diego, CA (US);
Abstract
Techniques for low-pass filtering with high quality factor (Q). In an exemplary embodiment, an input current is coupled to the drain of a first transistor. The drain and the gate of the first transistor are coupled together by a resistor R, and the drain is coupled to a reference voltage by a first capacitor C. The gate is coupled to a reference voltage by a second capacitor C. The gate is further coupled to the gate of a second transistor, and an output current is coupled to the drain of the second transistor. In another exemplary embodiment, further passive elements may be coupled to generate an odd-order low-pass transfer characteristic. Multiple filters may be cascaded in series to synthesize a filter having arbitrary order.