Mixer circuit having improved even order noise, DC offset,...

Details Mixer circuit having improved even order noise, DC offset,... Mixer circuit having improved even order noise, DC offset,...

2006-04-25

2006-04-25

Vo, Nguyen T. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S324000, C455S333000

Reexamination Certificate

active

07035615

ABSTRACT:
The present invention relates to improvement of even order distortion noise, DC offset, and non-linearity of mixer circuits. According to the present invention, a mixer circuit is provided, which comprises a splitter for splitting an input signal to the first and second signal having phase difference of 180 degree, a local oscillator, first mixer for mixing the first signal with the local oscillation signal, second mixer for mixing the second signal with the local oscillation signal, and subtractor for subtracting the output of the second mixer from the output of the first mixer.

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patent: 6073001 (2000-06-01), Sokoler
patent: 6680650 (2004-01-01), Gupta
patent: 0 305 602 (1989-03-01), None
patent: 0 877 476 (1998-11-01), None
Takafumi Yamaji, Hiroshi Tanimoto “A 2GHz Balanced Harmonic Mixer for Direct-Conversion Receivers” Custom Integrated Circuits Conference, 1997 IEEE, Research and Development Center, Toshiba Corporation Kawasaki, Japan.
Zhiheng Chen and Jack Lau Radio Frequency Integrated Circuits(RFIC) Syposium, 1998 IEEE p. 342, col 2, line 5—line 9 & figure 4.
Popa, C,; Mitrea, O. Image and Signal Processing and Analysis, 2001. ISPA 2001 Proceedings of the 2ndInternational Symposium on Published:2001 line 4—line 7 & p. 513.

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