System and method for calibrating single sideband receiver rejec

Details System and method for calibrating single sideband receiver rejec System and method for calibrating single sideband receiver rejec

1998-06-09

2000-06-20

Bost, Dwayne D.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

455 63, H04B 110

Patent

active

060787996

ABSTRACT:
For use with a first transceiver, a system for, and method of, calibrating a first image reject mixer in the first transceiver and having first and second image products. In one embodiment, the system includes: (1) a second image reject mixer, associated with a second transceiver and tuned to a rejected one of the first and second image products. The system further includes a signal strength circuit, coupled to the second image reject mixer, that determines a signal strength of the rejected one. The system still further includes a trimmer, associated with the first image reject mixer, that trims the first image reject mixer to move the rejected one toward an optimal value of the signal strength.

REFERENCES:
patent: 4864643 (1989-09-01), French et al.
patent: 5239683 (1993-08-01), Usui
patent: 5428669 (1995-06-01), McCarthy
patent: 5678220 (1997-10-01), Fournier
patent: 5867766 (1999-02-01), Dinc et al.
patent: 5950119 (1999-09-01), McGeehan et al.

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