07072427 is referenced by 89 patents and cites 696 patents.

Methods and apparatuses for reducing DC offsets in a communication system are described. In a first aspect, a feedback loop circuit reduces DC offset in a wireless local area network (WLAN) receiver channel. The frequency response of the feedback loop circuit can be variable. In a second aspect, a circuit provides gain control in a WLAN receiver channel. The stored DC offset is subtracted from the receiver channel. First and second automatic gain control (AGC) amplifiers are coupled in respective portions of the receiver channel. In a third aspect, a feedback loop circuit reduces DC offset in a WLAN receiver channel. The feedback loop circuit includes a storage element that samples and stores receiver channel DC offset. The loop is opened, and the DC offset stored in the storage element is subtracted from the receiver channel. Circuits for monitoring DC offset, and for providing control signals for controlling the frequency response of the DC offset reducing circuits are also provided.

Title
Method and apparatus for reducing DC offsets in a communication system
Application Number
10/289377
Publication Number
7072427 (B2)
Application Date
November 7, 2002
Publication Date
July 4, 2006
Inventor
David F Sorrells
Middleburg
FL, US
Michael W Rawlins
Lake Mary
FL, US
Kevin Brown
Clermont
FL, US
Gregory S Rawlins
Heathrow
FL, US
Agent
Sterne Kessler Goldstein & Fox PLLC
Assignee
ParkerVision
FL, US
IPC
H04B 1/10
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