Semiconductor integrated circuit, communication module, and smart meter

Semiconductor integrated circuit, communication module, and smart meter

A semiconductor integrated circuit includes a transformer that includes a first winding and a second winding, a low-noise amplifier circuit that includes an input terminal in which at least one end of the second winding of the transformer is connected to the input terminal; and a switch that is prov...

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1. Verfasser: Matsuno Noriaki
Format: Patent
Sprache:eng
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AMPLIFIERS
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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creator Matsuno Noriaki
description A semiconductor integrated circuit includes a transformer that includes a first winding and a second winding, a low-noise amplifier circuit that includes an input terminal in which at least one end of the second winding of the transformer is connected to the input terminal; and a switch that is provided between the one end and another end of the second winding of the transformer. The switch is opened and the transformer functions as an input impedance matching circuit for the low-noise amplifier circuit in a period in which a reception signal is supplied to the first winding of the transformer. On the other hand, the switch is closed and the transformer is caused to become an element including a predetermined capacitance in a period in which another circuit connected to the predetermined node operates.
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The switch is opened and the transformer functions as an input impedance matching circuit for the low-noise amplifier circuit in a period in which a reception signal is supplied to the first winding of the transformer. 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The switch is opened and the transformer functions as an input impedance matching circuit for the low-noise amplifier circuit in a period in which a reception signal is supplied to the first winding of the transformer. On the other hand, the switch is closed and the transformer is caused to become an element including a predetermined capacitance in a period in which another circuit connected to the predetermined node operates.</abstract><oa>free_for_read</oa></addata></record>
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subjects AMPLIFIERS
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
title Semiconductor integrated circuit, communication module, and smart meter
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