US 2023/0155558 A1Published application

Power amplifier circuit

AssigneeMurata Manufacturing Co., Ltd.

InventorMasatoshi HASE

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Abstract

A power amplifier circuit includes amplifying transistors electrically cascade-connected, amplifying a signal supplied to a base, and outputting an amplified signal; a first resistive element having end parts connected to the base of a first amplifying transistor; a second resistive element having end parts connected to the base of a second amplifying transistor, which is an amplifying transistor located closer to an input side than the first amplifying transistor; a first bias supplying transistor having an emitter connected to one of the end parts of the first resistive element; a second bias supplying transistor having an emitter connected to one of the end parts of the second resistive element; and a bias current compensation transistor having a base connected to the end part of the first resistive element, a collector connected to the end part of the second resistive element, and an emitter connected to ground.

Claims12

Dependent claims

A power amplifier circuit comprising:

a plurality of amplifying transistors comprising a first amplifying transistor and a second amplifying transistor, the plurality of amplifying transistors being electrically cascade-connected, each of the plurality of amplifying transistors being configured to amplify a signal supplied to a base or gate thereof and to output an amplified signal;
a first resistive circuit element having a first end, and a second end connected to the base or gate of the first amplifying transistor;
a second resistive circuit element having a first end, and a second end connected to the base or gate of the second amplifying transistor;
a first bias supplying transistor having an emitter or source connected to the first end of the first resistive circuit element;
a second bias supplying transistor having an emitter or source connected to the first end of the second resistive circuit element;
and
a bias current compensation transistor having a base or gate connected to the first end of the first resistive circuit element, a collector or drain connected to the first end of the second resistive circuit element, and an emitter or source connected to ground.

4 more elements

Dependencies are inferred from the claim text.