Mixer for direct conversion receiver

Details Mixer for direct conversion receiver Mixer for direct conversion receiver

1991-08-06

1994-04-12

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455324, 455333, 307529, H04B 128

Patent

active

053034171

ABSTRACT:
A mixer system for a direct conversion receiver, the receiver including an RF input path which is divided into I and Q paths for demodulating from the RF signals I and Q signals in phase quadrature with one another, the mixer system including first and second serially coupled mixer means in the I path, third and fourth serially coupled mixer means in the Q path, and a local oscillator providing a plurality of local oscillator signals in phase quadrature with one another to the mixer means, such that the first mixer means receives a local oscillator signal in phase quadrature to the local oscillator signal applied to the second mixer means, and the third mixer means receives a local oscillator in phase quadrature to that applied to the fourth mixer means.

REFERENCES:
patent: 4032857 (1977-06-01), Lum
patent: 4394626 (1983-07-01), Kurihara
patent: 4584710 (1986-04-01), Hansen
patent: 4768187 (1988-08-01), Marshall

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