Low-noise amplifier circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorsRyota OCHI, Koudai SUGIYAMA, Masamichi TOKUDA, Kenji FURUSAWA
Life of this patent
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Abstract
A low-noise amplifier circuit includes an input terminal, an output terminal, an amplifier connected between the input terminal and the output terminal, a limiter circuit including a first diode and a second diode connected in parallel in opposite directions between a ground and a path connecting the input terminal to the input end of the amplifier, a matching circuit including an inductor connected between the ground and the path connecting the input terminal to the input end of the amplifier, and a capacitor connected between the limiter circuit and the ground and between the matching circuit and the ground.
Claims20
A low-noise amplifier circuit comprising:
- an input terminal;
- an output terminal;
- an amplifier connected between the input terminal and the output terminal;
- a limiter circuit including a first diode and a second diode connected in parallel in opposite directions between a ground and a path connecting the input terminal to an input end of the amplifier;
- a matching circuit including a first inductor connected between the ground and the path connecting the input terminal to the input end of the amplifier;
- and
- a first capacitor connected between the limiter circuit and the ground and between the matching circuit and the ground.
A method of manufacturing a low-noise amplifier circuit, the method comprising:
- forming a first capacitor on a first metal layer of a substrate;
- forming a transmission line transformer including a first inductor and a second inductor on a second metal layer and a third metal layer, respectively, such that, in plan view, the transmission line transformer overlaps the first capacitor;
- and
- electrically connecting the first capacitor to both a limiter circuit and a matching circuit.
Dependencies are inferred from the claim text.