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US 11,637,532 B2Granted
Amplifier circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorsTakashi Kawanami, Makoto Tabei
Life of this patent
Estimating the term…
Abstract
An amplifier circuit includes: a transistor provided between an input terminal and an output terminal and having a gate connected to the input terminal, a source connected to a ground, and a drain connected to the output terminal; an inductor connected between the source and the ground; an inductor connected between the gate and the input terminal, and switches connected to at least one of the inductors and configured to change a mutual inductance of the inductors.
Claims19
An amplifier circuit comprising:
- a first transistor between an input terminal to which a radio-frequency signal is input and an output terminal from which an amplified radio-frequency signal is output, the first transistor having a first terminal that is a gate or a base connected to the input terminal, a second terminal that is a source or an emitter connected to ground, and a third terminal that is a drain or a collector connected to the output terminal;
- a first inductor connected between the second terminal and ground;
- a second inductor connected between the first terminal and the input terminal;
- and
- one or more switches, each of the switches being connected to the first inductor or the second inductor, and the one or more switches being configured to selectively change a mutual inductance between the first inductor and the second inductor, wherein at least one of the switches is connected to the first inductor.
2 more elements
An amplifier circuit comprising:
- a first transistor between an input terminal to which a radio-frequency signal is input and an output terminal from which an amplified radio-frequency signal is output, the first transistor having a first terminal that is a gate or a base connected to the input terminal, a second terminal that is a source or an emitter connected to ground, and a third terminal that is a drain or a collector connected to the output terminal;
- a first inductor connected between the third terminal and the output terminal;
- a second inductor connected between the first terminal and the input terminal;
- and
- one or more switches, each of the switches being connected to the first inductor or the second inductor, and the one or more switches being configured to selectively change a distance between the first inductor and the second inductor, an overlapping area between the first inductor and the second inductor, or a permeability between the first inductor and the second inductor.
2 more elements
An amplifier circuit comprising:
- a first transistor between an input terminal to which a radio-frequency signal is input and an output terminal from which an amplified radio-frequency signal is output, the first transistor having a first terminal that is a gate or a base connected to ground, a second terminal that is a source or an emitter connected to one of the input terminal or the output terminal, and a third terminal that is a drain or a collector connected to the other one of the input terminal or the output terminal;
- a first inductor connected between the third terminal and the other one of the input terminal or the output terminal;
- a second inductor connected between the second terminal and the one of the input terminal or the output terminal;
- and
- one or more switches, each of the switches being connected to the first inductor or the second inductor,
- wherein the first inductor or the second inductor includes a center tap that divides an inductance component of the first inductor or the second inductor into multiple components, and
- wherein at least one of the switches is connected to the center tap.
4 more elements
Dependencies are inferred from the claim text.