英语翻译近年来随着计算机和互联网的迅速普及,宽带放大器成为音响、有线电视、无线通信等系统中必不可少的部分.本系统采用ST

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英语翻译
近年来随着计算机和互联网的迅速普及,宽带放大器成为音响、有线电视、无线通信等系统中必不可少的部分.本系统采用STC89c52单片机作为微控制器,以可编程增益放大器AD603为放大电路的核心,设计并制作了具有增益预置和程控等功能的宽带直流放大器及使用的直流电源.采用AD603组成增益控制放大电路实现在0～40dB范围内手动连续调节,且最大输出电压正弦波有效值Vo≥2V,输出信号披形无明显失真；在0～4MHz通频带内增益起伏≤ldB；输出信号经有效值检测后,通过A/D转化为数字信号,并通过微控制器进行输出显示.
系统包括六个模块：前级放大模块、增益控制模块、后级功率放大模块、A/D(D/A)模块、显示模块和电源模块.在系统设计过程中,采用差分放大电路抑制零点漂移,提高系统电路稳定性,改善电路性能.

1个回答分类：综合 2014-12-12

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In recent years,with the rapid popularity of computers and the Internet,broadband amplifier for audio,cable television,wireless communication system such as the essential part of the.STC89c52 single-chip microcomputer as the controller is applied in this system,based on the programmable gain amplifier AD603 amplification circuit of the core,designed and produced with presets and SPC functions such as dc amplifier gain and the use of dc power supply.Using AD603 of gain control amplifier circuit implementation within 0 40 db continuous adjustment,manual and largest RMS Vo 2 v or higher output voltage sine wave,the output signal (form no obvious distortion; In 0 4 MHZ gain within passband fluctuation.ldb or less; Output signal after RMS detection,through the A/D conversion for digital signal,and output shows through micro controller.system consists of six modules

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