I/Q timing mismatch compensation

Details I/Q timing mismatch compensation I/Q timing mismatch compensation

2004-04-30

2009-08-25

Burd, Kevin M (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

Reexamination Certificate

active

07580481

ABSTRACT:
Timing correction is affected for mismatch between channels in an I/Q demodulator. The respective demodulated I-channel and Q-channel are correlated and integrated so generate a timing control signal that is applied to a variable delay element. The variable delay element inserts a variable time delay in an ADC clock signal that is applied to either the I-channel ADC or the Q-channel ADC.

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“High-Frequency Nonlinearity Analysis of Common-Emitter and Differential-Pair Transconductance Stages” Fong, Keng Leong and Robert G. Meyer.IEEE Journal of Solid State Circuits, vol. 33, No. 4, pp. 548-555. Apr. 1998.
“A 2.4 Monolithic Mixer for Wireless LAN Applications” Fong, Keng Leong and Robert G. Meyer.IEEE Custom Integrated Circuits Conference, pp. 9.4.1-9.4.4, May 1997.
“A Class AB Monolithic Mixer for 900 MHz Applications” Fong, Keng Leong, Christopher D. Hull, and Robert G. Meyer.IEEE Journal of Solid-State Circuits, pp. 1166-1172, Aug. 1997.

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