Wireless transmitter having multiple programmable gain...

Details Wireless transmitter having multiple programmable gain... Wireless transmitter having multiple programmable gain...

2007-02-27

2007-02-27

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

C330S126000

Reexamination Certificate

active

11094272

ABSTRACT:
A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second programmable gain amplifiers (PGAs). The first PGA is tuned to have a resonant frequency that is less than an operating frequency of the first PGA. The second PGA is tuned to have a resonant frequency that is greater than an operating frequency of the second PGA. A magnitude response at an output of the first PGA and a magnitude response at an output of the second PGA combine to provide a substantially linear magnitude response across a frequency range that includes the operating frequency of the first or second PGA. According to an embodiment, the first and second PGAs have the same operating frequency.

REFERENCES:
patent: 7031668 (2006-04-01), Darabi et al.
patent: 7120411 (2006-10-01), Darabi
patent: 2005/0287964 (2005-12-01), Tanaka et al.
patent: 2006/0178165 (2006-08-01), Vassiliou et al.

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