Semiconductor integrated circuit and wireless transmitter
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United States of America Patent
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Dec 26, 2017
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app pub date -
Mar 29, 2016
filing date -
Oct 18, 2013
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Abstract
A semiconductor integrated circuit includes a first transmission power mode configured to transmit by a first power, and a second transmission power mode configured to transmit by a second power smaller than the first power, the semiconductor integrated circuit. The semiconductor integrated circuit includes a first transistor configured to receive and amplify a transmission signal in the second transmission power mode, and an attenuator including a resistor element and a switching element, provided between an output of the first transistor and an output terminal, configured to control attenuation of an output signal of the first transistor.
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