High dynamic range time-varying integrated receiver for...

Telecommunications – Receiver or analog modulated signal frequency converter

Reexamination Certificate

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C455S323000, C455S333000

Reexamination Certificate

active

07460844

ABSTRACT:
A quadrature mixer with an LO input is provided. The quadrature mixer receives a signal having a frequency FLOand a signal input having a frequency FSIG, and has an output that comprises an output impedance that is high at frequencies of |FLO−FSIG| and |FLO+FSIG| and low at other. A mixer coupled to the output impedance interacts with the output impedance such that an impedance presented at the signal input is high for signals at FSIGif FSIGis a predetermined signal frequency, and low at other frequencies.

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PCT International Search Report and Written Opinion of the International Searching Authority, mailed Jun. 9, 2005.

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