Amplifiers – With plural amplifier channels – Amplifying different frequencies in different channels
Reexamination Certificate
2007-10-29
2010-02-02
Choe, Henry K (Department: 2817)
Amplifiers
With plural amplifier channels
Amplifying different frequencies in different channels
C330S302000
Reexamination Certificate
active
07656228
ABSTRACT:
A matching circuit includes a demultiplexer for demultiplexing a signal outputted from an amplification device into signals of respective frequency bands, and at least two matching blocks which are connected to the demultiplexer, are respectively fed with the signals of the respective frequency bands, and perform impedance matching in the respective frequency bands of the inputted signals. Impedance matching is performed on each of the demultiplexed signals of the respective frequency bands, thereby achieving a matching circuit capable of efficiently performing impedance matching in the respective frequency bands. With this matching circuit, it is possible to achieve a multi-band amplifier capable of simultaneously amplifying signals of multiple frequency bands with high efficiency and low noise.
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Fukuda Atsushi
Narahashi Shoichi
Okazaki Hiroshi
Choe Henry K
NTT DoCoMo Inc.
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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