Circuit and method for receiving and mixing radio...

Details Circuit and method for receiving and mixing radio... Circuit and method for receiving and mixing radio...

2006-10-10

2006-10-10

Le, Lana (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S323000, C455S333000, C455S318000, C327S359000

Reexamination Certificate

active

07120414

ABSTRACT:
A frequency mixing circuit and a frequency mixing method. The frequency mixing circuit includes first and second differential amplifiers, a subtracter and a mixer. The first differential amplifier amplifies a first pair of input signals having a first frequency to generate a first differential signal. The second differential amplifier amplifies a second pair of input signals having the first frequency orthogonal to the first pair input signals to generate a second differential signal. The subtracter subtracts the second differential signal from the first differential signal. The mixer mixes the subtracted signal with a first and second pairs of drive signals having a second frequency orthogonal to each other, in a sub-harmonic double balanced mixing mode, so that the mixer generates a pair of output signals orthogonal to each other without secondary harmonics.

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patent: 1020020068128 (2002-08-01), None

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