Mixer circuit with image frequency rejection, in particular...

Details Mixer circuit with image frequency rejection, in particular... Mixer circuit with image frequency rejection, in particular...

2006-05-09

2006-05-09

Nguyen, Duc (Department: 2643)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S326000, C455S324000, C455S209000, C455S295000, C375S346000

Reexamination Certificate

active

07043221

ABSTRACT:
A mixer circuit with image frequency rejection comprising a quadrature phase divider (30, 30′) presenting an input connected to the input (Fi) of the mixer circuit and two outputs respectively delivering two signals in phase quadrature which are applied respectively to two simple mixers (31, 32; 31′, 32′), said mixer circuit comprising a quadrature phase and frequency divider (33, 33′) having a frequency division ratio and presenting two inputs respectively connected to the respective outputs of the two simple mixers (31, 32; 31′, 32′) and a first output delivering a first output signal (Fo) of the mixer circuit, which signal is applied to the inputs of the two simple mixers.

REFERENCES:
patent: 5410743 (1995-04-01), Seely
patent: 5821782 (1998-10-01), Carloni
patent: 6397044 (2002-05-01), Nash et al.
patent: 6516184 (2003-02-01), Damgaard et al.
patent: 6867687 (2005-03-01), Turner
patent: 2003/0072389 (2003-04-01), Li et al.
patent: 0 292 002 (1998-11-01), None
patent: 01 15313 (2001-03-01), None
International Search Report for PCT/FR02/02595; ISA/EPO; Mailed: Dec. 16, 2002.

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