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. 13, 2008
Filed:
Jun. 09, 2004
Spyros Pipilos, Athens, GR;
Spyros Pipilos, Athens, GR;
Theta Microelectronics, Inc., San Jose, CA (US);
Abstract
A wireless local area network receiver having separate automatic gain control (AGC) loops for providing a radio frequency AGC and a baseband frequency AGC, as well as a DC offset cancellation circuit. The AGC loops control a low noise amplifier amplifying the received RF signal, and the baseband signal or signals from a mixer of I and Q mixers. The DC offset compensation loop is also responsive to the baseband AGC signal to maintain a substantially fixed gain in the DC offset compensation feedback. Details of various embodiments are disclosed, including embodiments for orthogonal frequency division multiplexing (OFDM) that provide the AGC operation and the DC offset cancellation to the desired levels within the relatively short period of a preamble that precedes the data transmission.