Mixing apparatus

Details Mixing apparatus Mixing apparatus

2005-08-30

2005-08-30

Urban, Edward F. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S323000, C455S315000, C327S113000

Reexamination Certificate

active

06937849

ABSTRACT:
A mixer circuit is provided for receiving first and second input signals to be mixed and for producing a mixed output signal. The mixer circuit comprises a pair of switching transistors each of which having first, second and third terminals. The mixer circuit further comprises a single ended input connected to the first terminals of the pair of switching transistors, a local oscillator input connected to the second terminals of the pair of switching transistors for controlling the switching of the transistors, a serial capacitor connected in serial connection between the single ended input and the first terminals of the pair of switching transistors, a pair of output capacitors each of which being connected to a third terminal of the pair of switching transistors. Said third terminals of said pair of switching transistors forming an output port. The mixer circuit provides a mixer schematic with improved noise performance.

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