Method and apparatus for generating corrected quadrature...

Details Method and apparatus for generating corrected quadrature... Method and apparatus for generating corrected quadrature...

2007-05-30

2010-06-22

Tran, Khanh C (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S302000

Reexamination Certificate

active

07742545

ABSTRACT:
A method and an apparatus (300) for generating corrected quadrature phase signal pairs in a communication device are provided. The apparatus (300) includes a quadrature phase generator (310), programmable delay elements (320, 330) and a control circuit (360). The programmable delay elements (320, 330) receive a quadrature phase signal pair (signals I312and Q314) from the quadrature phase generator (310). The control circuit (360) generates a control signal (362) based on outputs (325, 335) of the programmable delay elements (320, 330). The control signal (362) configures the programmable delay elements (320, 330). The programmable delay elements (320, 330) are configured to adjust delay between the signals I (312) and Q (314). The programmable delay elements (320, 330) are also used to adjust duty cycle for the quadrature phase signal pair to provide the corrected quadrature phase signal pair.

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PCT International Search Report Applicaiton No. PCT/US2008/064289 Dated Oct. 30, 2008—13 Pages.

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