Frequency-mixing method and frequency-mixing device using...

Details Frequency-mixing method and frequency-mixing device using... Frequency-mixing method and frequency-mixing device using...

2008-05-06

2008-05-06

Phu, Sanh D. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S323000, C455S189100, C455S209000, C455S293000, C455S326000, C330S127000

Reexamination Certificate

active

07369837

ABSTRACT:
A frequency-mixing method includes a step of generating a first quadrature signal having a predetermined frequency, a second quadrature signal having a phase difference of about 180 degrees with respect to a phase of the first quadrature signal, a third quadrature signal having a phase difference of about 90 degrees with respect to the phase of the first quadrature signal and a fourth quadrature signal having a phase difference of about 90 degrees with respect to a phase of the second quadrature signal; a step of controlling a phase of the third quadrature signal and a phase of the fourth quadrature signal so as to control a linearity of a frequency mixer; and a step of down-converting a radio frequency (RF) signal using the first through the fourth quadrature signals. Accordingly, performance of a direct-conversion receiver (DCR) can be improved by employing a frequency-mixing device capable of enhancing a linearity of a frequency mixer.

REFERENCES:
patent: 6369651 (2002-04-01), Dent
patent: 6370372 (2002-04-01), Molnar et al.
patent: 6380927 (2002-04-01), Ostrum et al.
patent: 6587678 (2003-07-01), Molnar et al.
patent: 6970020 (2005-11-01), Mei et al.
patent: 2001-230631 (2001-08-01), None
patent: 2002-076976 (2002-03-01), None

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