Semiconductor integrated circuit and wireless transmitter
AssigneeFujitsu Limited
InventorsKouichi Kanda, Shoichi Masui
Life of this patent
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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.
Claims9
A semiconductor integrated circuit including 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 comprising:
- 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, wherein
- in the first transmission power mode, a transistor different from the first transistor receives and amplifies the transmission signal.
A wireless transmitter comprising:
- a semiconductor integrated circuit including 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;
- an antenna configured to output the first power of the first transmission power mode and the second power of the second transmission power mode;
- and
- a matching circuit configured to perform matching of the semiconductor integrated circuit and the antenna, provided between the semiconductor integrated circuit and the antenna, wherein the semiconductor integrated circuit comprising:
- 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, wherein
- in the first transmission power mode, a transistor different from the first transistor receives and amplifies the transmission signal.
Dependencies are inferred from the claim text.