英语翻译本系统有四个模块组成：程控放大器,程控滤波器,四阶椭圆低通滤波器,以及简易幅频特性测试仪.程控放大器放大电压增益为60dB,增益10db步进可调,电压增益误差不大于5%.通频带100HZ～
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英语翻译本系统有四个模块组成：程控放大器,程控滤波器,四阶椭圆低通滤波器,以及简易幅频特性测试仪.程控放大器放大电压增益为60dB,增益10db步进可调,电压增益误差不大于5%.通频带100HZ～
英语翻译
本系统有四个模块组成：程控放大器,程控滤波器,四阶椭圆低通滤波器,以及简易幅频特性测试仪.程控放大器放大电压增益为60dB,增益10db步进可调,电压增益误差不大于5%.通频带100HZ～200KHz,放大器输出无明显失真.由MAX262为核心的程控滤波器可设置为低通,高通滤波器,-3dB截至频率在1KHz～20KHz范围内可调,调节的频率步进为1KHz.四阶椭圆型低通有源滤波器,带内起伏≤1dB,-3dB通带为50kHz,要求放大器与低通滤波器在200kHz处的总电压增益小于5dB,-3dB通带误差不大于5%.简易幅频特性测试仪输出扫频信号频率设置范围100Hz～200KHz,频率100Hz步进可调.系统以AT89S52为控制核心,经测试验证,系统运行稳定,操作方便.
关键词：程控放大器,程控滤波器,椭圆滤波器,幅频特性测量
英语翻译本系统有四个模块组成：程控放大器,程控滤波器,四阶椭圆低通滤波器,以及简易幅频特性测试仪.程控放大器放大电压增益为60dB,增益10db步进可调,电压增益误差不大于5%.通频带100HZ～
The system has four modules: program-controlled amplifiers, programmable filters, fourth-order elliptic low pass filter, and amplitude-frequency characteristics of simple tester. Programmable amplifier voltage gain 60dB, gain 10db step adjustable voltage gain error is less than 5%. Pass band 100HZ ~ 200KHz, the amplifier output without significant distortion. The core of the program-controlled by the MAX262 filter can be set to low pass, high pass filter,-3dB at 1KHz ~ 20KHz frequency range of adjustable, adjust the frequency step is 1KHz. Fourth-order elliptic low pass filter, band fluctuations ≤ 1dB,-3dB passband to 50kHz, required amplifier and low pass filter in the 200kHz office is less than the total voltage gain 5dB,-3dB passband error is less than 5%. Simple amplitude-frequency characteristics of the frequency sweep signal tester to set the output range of 100Hz ~ 200KHz, frequency 100Hz adjustable step. AT89S52 as the control system to the core, has been tested and verified, the system is stable, easy to operate.