Frequency converter with nonlinear distortion cancellation

Details Frequency converter with nonlinear distortion cancellation Frequency converter with nonlinear distortion cancellation

2006-08-08

2006-08-08

Urban, Edward F. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S296000, C330S149000

Reexamination Certificate

active

07088980

ABSTRACT:
A frequency converter comprises a first mixer which frequency-converts an input signal with a first conversion gain in accordance with a local signal, a second mixer which frequency-converts the input signal with a second conversion gain lower than the first conversion gain in accordance with the local signal, and an adder which adds the output signals of the first and second mixers in opposite phase to each other in order to reduce distortion.

REFERENCES:
patent: 5917375 (1999-06-01), Lisco et al.
patent: 6230001 (2001-05-01), Wyse
patent: 6242979 (2001-06-01), Li
patent: 6768379 (2004-07-01), Umeda et al.
patent: 6794938 (2004-09-01), Weldon
patent: 2002/0126767 (2002-09-01), Ding et al.
patent: 1-221905 (1989-09-01), None
patent: 2001-127555 (2001-05-01), None
Yongwang Ding, et al., “A +18dBm IlP3 LNA in 0.35μm CMOS”, ISSCC 2001/Session 10/Wireless Building Blocks I / 10.5, 2001 IEEE International Solid-State Circuits Conference, Feb. 6, 2001, 10 pages.

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