R2 and R4 are chosen to minimize errors due to input offset current as outlined in the section describing the photocell amplifier.
R2和R4用来降低因输入失调电流产生的误差，其原理与前文光电二极管放大器所述一致。
In the controller design section, the design process of the power supply circuit, Hall sensor circuit, control circuit, power amplifier circuit is introduces. iv.
在控制器设计部分，分别介绍了电源电路、霍尔传感器电路、控制器电路、功放电路的设计过程。
BUX series power amplifier is a section high-performance power amplifier, in order to satisfy the requirements of high voice.
BUX系列功放是一款高性能的功率放大器，为满足对声音要求极高的系统所设计的。
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