Log-antilog circuit and method for producing an up-converted...

Details Log-antilog circuit and method for producing an up-converted... Log-antilog circuit and method for producing an up-converted...

2011-06-21

2011-06-21

Phu, Phuong (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S295000, C375S296000, C375S268000, C375S300000, C455S108000, C455S110000, C455S118000

Reexamination Certificate

active

07965790

ABSTRACT:
According to one exemplary embodiment, a method for producing an up-converted and amplified transmission signal comprises performing a logarithmic transformation of an input transmission signal to form a logarithmically transformed transmission signal, adding the logarithmically transformed transmission signal to a logarithmic local oscillator signal to form a sum signal, and performing an antilogarithmic transformation of the sum signal to produce the up-converted and amplified transmission signal. In one embodiment, a log-antilog circuit for producing an up-converted and an amplified transmission signal comprises a transmission log block configured to receive an input transmission signal and to provide a logarithmically transformed transmission signal as a transmission log block output, and an antilog block coupled to the transmission log block. The antilog block is configured to receive a sum signal of the transmission log block output and a logarithmic local oscillator signal.

REFERENCES:
patent: 5793244 (1998-08-01), Ueda
patent: 2005/0017801 (2005-01-01), Bachman et al.
U.S. Appl. No. 11/975,209, filed Oct. 17, 2007.

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