Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2007-10-17
2010-11-16
Le, Thanh C (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S324000
Reexamination Certificate
active
07835715
ABSTRACT:
According to one exemplary embodiment, a method for producing frequency conversion of a communication signal comprises performing a logarithmic transformation of the communication signal to form a logarithmically transformed communication signal, adding the logarithmically transformed communication signal to a logarithmic local oscillator signal, to form a sum signal, and performing an anti-logarithmic transformation of the sum signal. In one embodiment, the method may be used to down-convert a reception signal to baseband. In one embodiment, a log-antilog mixer circuit for producing frequency conversion of a communication signal comprises a signal log block configured to receive the communication signal as an input and to provide a logarithmically transformed communication signal as an output, and an antilog block configured to receive a sum signal of the logarithmically transformed communication signal and a logarithmic local oscillator signal.
REFERENCES:
patent: 2005/0197092 (2005-09-01), Darabi
patent: 2005/0239420 (2005-10-01), Nam
patent: 2009/0122907 (2009-05-01), Ford
Broadcom Corporation
Farjami & Farjami LLP
Le Thanh C
LandOfFree
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