Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Reexamination Certificate
2005-09-08
2008-09-30
Nguyen, Tony T (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
C455S127200, C455S232100
Reexamination Certificate
active
07430405
ABSTRACT:
A gain control circuit has a transmission power amplifier that amplifies a transmission signal to a predetermined level. An adjacent channel leak power ratio monitor finds a ratio of a distortion element corresponding to an adjacent channel leak power to a main element from an output signal supplied from the transmission power amplifier, and outputs the found ratio as an ACPR monitor value. A power supply control section variously controls power supply to the transmission power amplifier with use of the ACPR monitor value supplied from the adjacent channel leak power ratio monitor. A transmission signal level variable section controls a gain of a transmission signal path on the basis of a transmission level monitor value supplied from the adjacent channel leak power ratio monitor, thereby varying a level of the transmission signal.
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U.S. Appl. No. 11/220,584, filed Sep. 8, 2005, Hayashihara.
Kabushiki Kaisha Toshiba
Nguyen Tony T
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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