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Title:
LO GENERATION WITH DESKEWED INPUT OSCILLATOR SIGNAL AND SINGLE ENDED DYNAMIC DIVIDER FOR DIFFERENTIAL QUADRATURE SIGNALS
Document Type and Number:
WIPO Patent Application WO/2010/057037
Kind Code:
A3
Abstract:
Techniques for generating local oscillator (LO) signals are described. In one design, an apparatus may include a deskew circuit and a divider circuit. The deskew circuit may receive a differential input oscillator signal having timing skew and provide a differential output oscillator signal having reduced timing skew. The differential input oscillator signal may include first and second input oscillator signals, and the differential output oscillator signal may include first and second output oscillator signals. In one design, the deskew circuit may include first and second variable delay circuits that receive the first and second input oscillator signals, respectively, and provide the first and second output oscillator signals, respectively. Each output oscillator signal may have an adjustable delay selected to reduce timing skew. The divider circuit may divide the differential output oscillator signal in frequency and provide differential I and Q divided signals, which may be used to generate LO signals.

Inventors:
PANIKKATH VINOD V (US)
GUDEM PRASAD S (US)
CICCARELLI STEVEN C (US)
Application Number:
PCT/US2009/064456
Publication Date:
April 28, 2011
Filing Date:
November 13, 2009
Export Citation:
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Assignee:
QUALCOMM INC (US)
PANIKKATH VINOD V (US)
GUDEM PRASAD S (US)
CICCARELLI STEVEN C (US)
International Classes:
H03B19/12; H03D7/16
Domestic Patent References:
WO2006033203A12006-03-30
Foreign References:
US6316987B12001-11-13
US5708399A1998-01-13
US6014047A2000-01-11
US6674772B12004-01-06
US20030042957A12003-03-06
US20080106313A12008-05-08
US20070239319A12007-10-11
EP1655591A12006-05-10
US20080116902A12008-05-22
US20070242548A12007-10-18
Attorney, Agent or Firm:
XU, Jiayu (5775 Morehouse DriveSan Diego, CA, US)
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