专业英语低频功率放大器翻译

1低频功率放大器摘要：本设计主要由前置放大电路、波形转换电路、、功率放大电路、稳压电源等电路组成。低噪声放大电路选取甚低噪声宽带高精度运算放大器OP37，并采用并联负反馈结构，具有良好的抗共模干扰能力。带阻滤波器在50Hz频率点输出功率衰减≥6dB，阻带频率范围为43～57Hz，有效滤除了工频噪声的干扰。功率放大电路采用的是双MOS晶体管的甲乙类推挽放大电路。设计的低频功率放大器的通频带为6Hz～150kHz，很好地完成了通频带的扩展。该设计采用的电路结构简单，选取的器件价格便宜。测试结果表明，该低频功率放大器可以很好地实现对低频信号的放大作用，具有较高的实用性，其输出带宽、功率、效率等都达到了较高的指标，为低频功率放大器的设计提供了广阔的思路。关键词：功率放大器、OP37、MOS晶体管、输出功率LowfrequencypoweramplifierAbstract:mainlybythedesignofthelownoiseamplifiercircuit,filtercircuit,asignalamplifyingcircuit,apoweramplificationcircuit,apeakdetectioncircuit,SCMcontrol,ADconversion,LCDdisplay,regulatedpowersupplycircuit.LownoiseamplifiercircuitselectionverylownoisewidebandhighprecisionoperationalamplifierOP37,andtheuseofparallelnegativefeedbackstructure,withgoodantiinterferencecapability.Bandstopfilterin50Hzfrequencypointoutputpowerattenuationwasmorethan6dB,thestopbandfrequenciesintherangeof43~57Hz,effectivelyfilteringthepowerfrequencyinterferencenoise.PoweramplifyingcircuitusingthedoubleMOStransistorclassABpush-pullamplifiercircuit.Designoflow-frequencypoweramplifierpassbandis6Hz~150kHz,doneagoodbandwidthexpansion.Thedesignadoptsthecircuitstructureissimple,theselecteddevicecheap.Thetestresultsshowthat,thelowfrequencypoweramplifiercanrealizetheonthelowfrequencysignalamplifyingfunction,withhighpracticality,2itsoutputbandwidth,power,efficiencyofallreachedahighindex,forlowfrequencypoweramplifierdesignprovidesabroadthinking.Keywords:poweramplifier,OP37,MOS,outputpowertransistor