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。
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。
The relationship between the temperature dependence of Erbium-doped Fiber Amplifier(EDFA) gain and emission and absorption cross-section of Erbium fiber is analyzed theoretically.
从理论上分析了掺铒光纤放大器（EDFA）增益的温度特性与铒光纤发射截面和吸收截面的关系，并通过实验研究了其增益随温度的变化关系。
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