Method and apparatus for down conversion of radio frequency...

Details Method and apparatus for down conversion of radio frequency... Method and apparatus for down conversion of radio frequency...

2003-02-25

2008-03-11

Le, Lana (Department: 2618)

Telecommunications

Carrier wave repeater or relay system

With frequency conversion

C455S147000, C455S148000, C455S150100, C455S151100, C455S151300, C375S216000

Reexamination Certificate

active

07343135

ABSTRACT:
There is a need for an inexpensive, high-performance, fully-integrable, multi-standard transceiver, which suppresses spurious noise signals. The invention provides a topology that satisfies this need, using a first signal generator which produces an oscillator signal f1and a second signal generator which produces a mono-tonal mixing signal φ2, where f1is a multiple of the frequency of φ2; and a logic circuit for generating a multi-tonal mixing signal φ1, where φ1*φ2has significant power at the frequency of said local oscillator signal being emulated, neither of said cp1nor said φ2having significant power at the carrier frequency of said input signal x(t) or said LO signal being emulated.

REFERENCES:
patent: 2005/0003787 (2005-01-01), Chen
patent: 2006/0141952 (2006-06-01), Kung et al.
patent: 2006/0246861 (2006-11-01), Dosanjh et al.
patent: 2007/0077902 (2007-04-01), Imae et al.
patent: 01 17122 (2001-03-01), None

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