Direct conversion receiver with reduced even order distortion

Details Direct conversion receiver with reduced even order distortion Direct conversion receiver with reduced even order distortion

1997-09-25

2000-02-01

Bost, Dwayne D.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455295, 455296, 455311, H04Q 732

Patent

active

06021323&

ABSTRACT:
A mixer for use in a direct conversion receiver includes a compensating differential amplifier which injects equal amplitude opposite phase currents with respect to even order distortion currents. The compensating differential amplifier utilizes an ideal current source. The mixer is an active mixer which utilizes four switching transistors. The even order distortion is introduced by non-linear components which demonstrate strong off-channel signals.

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patent: 4779057 (1988-10-01), Woo
patent: 4804926 (1989-02-01), Woo
patent: 5140198 (1992-08-01), Atherly et al.
patent: 5399988 (1995-03-01), Knierim
patent: 5507036 (1996-04-01), Vagher
patent: 5579347 (1996-11-01), Lindquist et al.

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