Amplifiers – With amplifier condition indicating or testing means
Reexamination Certificate
2009-04-09
2010-12-28
Choe, Henry K (Department: 2817)
Amplifiers
With amplifier condition indicating or testing means
C330S098000
Reexamination Certificate
active
07859330
ABSTRACT:
Systems and methods for characterizing amplifiers. A system for characterizing an amplifier in accordance with the present invention comprises a Gaussian signal source for generating a signal in the frequency domain, a notch filter, coupled to the Gaussian Noise source, wherein the notch filter has a notch at a specified frequency and a frequency bandwidth, the frequency bandwidth encompassing the specified frequency, an Inverse Fast Fourier Transform device, coupled to an output of the notch filter, a normalization device, coupled to the Inverse Fast Fourier Transform device, an amplifier under test, coupled to the normalization device, for amplifying the signal generated by the Gaussian signal source, and a measurement device, coupled to an output of the amplifier, for measuring a power output of the amplifier in the frequency bandwidth and a noise output at the specified notch frequency, and for calculating the ratio between the power output and the noise output.
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Chen Ernest C.
Comeaux Cecilia
Lai Dennis
Lin Tung-Sheng
Maitra Shamik
Choe Henry K
The DIRECTV Group Inc.
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