Apparatus for cancellation of DC offset in time division...

Details Apparatus for cancellation of DC offset in time division... Apparatus for cancellation of DC offset in time division...

2006-09-19

2006-09-19

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C375S319000

Reexamination Certificate

active

07109777

ABSTRACT:
A DC offset cancellation apparatus in a time division duplexing mode direct conversion receiver is disclosed that cancels DC offset of a present frame by using DC offset information of a previous frame by using a receive time difference between data transmission frames. Therefore, the DC offset cancellation unit has advantages of canceling the DC offset in an active mode in real time, of canceling the DC offset varying depending on time and circumferential conditions, and of minimizing power consumption by using an optimized element alignment.

REFERENCES:
patent: 5748681 (1998-05-01), Comino et al.
patent: 6184939 (2001-02-01), Wang et al.
patent: 6353641 (2002-03-01), Macq et al.
patent: 0 895 385 (1999-02-01), None
patent: 921663 (1999-06-01), None

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