Direct conversion receiver with DC offset compensation and...

Details Direct conversion receiver with DC offset compensation and... Direct conversion receiver with DC offset compensation and...

2006-12-05

2006-12-05

Vuong, Quochien B. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S324000, C455S341000, C375S345000

Reexamination Certificate

active

07146141

ABSTRACT:
A direct conversion receiver with DC offset compensation. The receiver includes an antenna receiving a RF signal, a mixture module converting the RF signal to a baseband signal, a gain amplifier amplifying the baseband signal, an adder subtracting a DC offset current from the baseband signal, a DC offset cancellation circuit obtaining and converting a DC offset value to the DC offset current, a track-and-hold circuit receiving the baseband signal, holding and transferring a DC offset voltage to the DC offset current, and a switching circuit alternatively coupling and decoupling the DC offset cancellation and track-and-hold circuit to receive the baseband signal.

REFERENCES:
patent: 6114980 (2000-09-01), Tilley et al.
patent: 6298226 (2001-10-01), Lloyd et al.
patent: 6366622 (2002-04-01), Brown et al.
patent: 6516185 (2003-02-01), MacNally
patent: 6771945 (2004-08-01), Pickett et al.
patent: 6985711 (2006-01-01), Holenstein et al.

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