Down conversion mixer

Details Down conversion mixer Down conversion mixer

1998-05-08

2000-06-06

Tsang, Fan

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455296, 455303, 455304, 455306, 455310, 455313, H04B 130

Patent

active

060730013

ABSTRACT:
A quadrature down converter comprises two channels, each of said channels comprising two parallel signal paths. Each of said signal path comprises a mixer mixing the signal for down conversion with an oscillator signal. In the in-phase channel the mixers receive the oscillator signal shifted 0.degree. and 180.degree. in phase, respectively. In the quadrature-phase channel the mixers receive the oscillator signal shifted 90.degree. and 270.degree. in phase, respectively. By filtering and combining (adding/subtracting) the signals from the signal paths in each of said channels, the disturbing second order terms from the mixers may be substantially eliminated.

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patent: 5428833 (1995-06-01), Reitberger et al.
patent: 5430895 (1995-07-01), Huusko
patent: 5850598 (1998-12-01), Behrent
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United Kingdom search report.

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