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翻译以下论文段落(别用翻译软件那一类的要专业英语人士!3Q!)

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翻译以下论文段落(别用翻译软件那一类的要专业英语人士!3Q!)
功率放大器就是一种能量转换的电路,在输入信号的作用下,晶体管把直流电源的能量,转换成随输入信号变化的输出功率送给负载低频功率放大器,其分前置放大级(前置激励级和激励级)和功率放大及两大部分。本设计以大功率管MOS管为核心原件,采用分立元件与集成运放相结合设计出的低频功率放大器。前置放大级主要完成小信号电压放大任务,同时要求低噪声、低温漂。因此选择了NE5532作为低噪声的前级放大,能够很好的抑制器件的本身噪声。根据效率的要求(大于55%),功率放大级采用甲乙类功率放大电路。AT89S52作为显示模块的控制核心,实现功率放大器输出功率、直流电源的供给功率和整机效率功能的显示。
翻译以下论文段落(别用翻译软件那一类的要专业英语人士!3Q!)
Power amplifier is a power conversion circuit, under the action of the input signal, transistors into DC power supply of energy, with the input signal into changes in low-frequency power amplifier output power given to the load, its sub-stage preamplifier (pre-incentive level and motivation level) and power amplification, and two parts. The design for high-power MOS tube as the core original pipe, using discrete components and integrated operational amplifier combines the low-frequency power amplifier design. Pre-amplification level the main task of the completion of the small-signal voltage amplification at the same time requiring low-noise, low temperature drift. Therefore chosen as a low-noise NE5532 preamp can be a very good noise suppression device itself. According to the requirements of efficiency (greater than 55%), power amplifier stage with Class-AB power amplifier circuit. AT89S52 as a display module to control the core of achieving power amplifier output power, DC power supply of power and machine efficiency, for display.