Stacked double balanced mixer circuit

Details Stacked double balanced mixer circuit Stacked double balanced mixer circuit

1994-08-29

1995-09-05

Urban, Edward F.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455326, 327357, H04B 128, H03B 1900

Patent

active

054487722

ABSTRACT:
A stacked double balanced mixer (220) includes a double balanced mixer (320) and a first cross coupled differential mixer (330). The double balanced mixer (320) includes two input transistors (321, 322) and four cross coupled output transistors (323-326). The first cross coupled differential mixer (330) includes four cross coupled input/output transistors (331-334) and a second mixer output (227, 228). The four cross coupled input/output transistors (331-334) have first output terminal pairs DC coupled in series to second output terminal pairs of the four cross coupled output transistors (323-326). The stacked double balanced mixer (220) generates, at the second mixer output (227,228), a second IF differential output signal having a second IF frequency at a difference of a radio frequency of a differential input signal and the sum of first and second LO frequencies, respectively, of first and second LO signals.

REFERENCES:
patent: 4216431 (1980-08-01), Shibata et al.
patent: 4695940 (1987-09-01), Rein
patent: 5379457 (1995-01-01), Nguyen
"Analysis and Design of Analog Integrated Circuits", By Gray and Meyer, 1977 Wiley & Sons, Inc., p. 564.

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