POWER AMPLIFIER CIRCUIT

• Main Authors: GOTO SATOSHI, HONDA YURI, SHIMAMOTO KENICHI, KOGUSHI YOSHIKI
• Format: Patent
• Language: Chinese; English
• Published: 18.01.2022
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY

A power amplifier circuit according to the present disclosure includes an amplifier circuit 12 serving as a differential amplifier circuit configured to be activated by a supply voltage that is variable in accordance with amplitude of a signal, a bias circuit 32 configured to output a bias to be supplied to the amplifier circuit 12, and first and second dispersion circuits 41, 42 respectively provided for a pair of differential signals outputted from the amplifier circuit 12 and configured to control dependence of gain of the amplifier circuit 12 on the supply voltage. The power amplifier circuit can achieve appropriate gain dispersion with symmetry of waveforms of differential signals outputted from the amplifier circuit. 本公开的功率放大电路具备：放大电路(12)，是通过根据信号的振幅而变动的电源电压进行动作的差动放大电路；偏置电路(32)，输出提供给放大电路(12)的偏置；和分散电路(41及42)，与从放大电路(12)输出的一对差动信号分别对应地设置，对放大电路(12)的增益的电源电压依赖进行调整。本发明的功率放大电路在放大电路的输出为差动信号的情况下，在保持差动信号的波形的对称性的同时实现适当的增益分散。