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:
Dec. 14, 2010
Filed:
Jul. 09, 2009
Ahmad Mirzaei, Costa Mesa, CA (US);
Amir Hadji-abdolhamid, Laguna Beach, CA (US);
Hooman Darabi, Irvine, CA (US);
Ahmad Mirzaei, Costa Mesa, CA (US);
Amir Hadji-Abdolhamid, Laguna Beach, CA (US);
Hooman Darabi, Irvine, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
An integrated circuit includes a signal-path filter, a high-pass filter, and a control circuit. The signal-path filter is configured to receive an input signal and provide an output signal. The high-pass filter is coupled to the signal-path filter and is configured to reduce a direct-current (DC) component of the input signal. The high-pass filter includes a metal-oxide-semiconductor (MOS) switch, wherein a corner frequency of the high-pass filter is based on a resistance of the MOS switch. The control circuit is configured to provide a control voltage to the MOS switch. The control circuit includes a reference resistor, wherein the resistance of the MOS switch substantially tracks the resistance of the reference resistor. The integrated circuit may be embodied in software and/or included in a device (e.g., a mobile telephone) that receives and filters a signal.