Power amplifier circuit and differential power amplifier circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorShohei Imai
Life of this patent
Estimating the term…
Abstract
A first transistor having a base or a gate supplied with a high-frequency signal through a capacitor, and supplied with a bias current through a resistive element, a second transistor having a base or a gate connected to an emitter or a source of the first transistor, and a collector or a drain connected to an output terminal, and a third transistor having a collector or a drain connected to the base or the gate of the first transistor, and an emitter or a source connected to reference potential are provided, and the third transistor is provided such that a current flowing through the collector or the drain of the third transistor increases when a current flowing through the collector or the drain of the second transistor increases.
Claims20
A power amplifier circuit, comprising:
- a first transistor comprising a base or a gate that is configured to receive a high-frequency signal through a capacitor, and further configured to receive a bias through a resistive circuit element;
- a second transistor comprising a base or a gate that is connected to an emitter or a source of the first transistor, and a collector or a drain that is connected to an output terminal;
- and
- a third transistor comprising a collector or a drain that is connected to the base or the gate of the first transistor, and an emitter or a source that is connected to a reference potential,
- wherein a current flowing through the collector or the drain of the third transistor increases when a current flowing through the collector or the drain of the second transistor increases.
Dependencies are inferred from the claim text.