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采用通用运算放大器进行电路测量、放大电路等的设计时 ,常常需要较高的放大倍数或按一定的要求调整其放大倍数 .针对实际应用中存在的这些问题 ,对T形电阻网络在运算放大器电路中的应用进行了实际测试 ;根据对试验结果的分析 ,得出了两种有实用价值的电路———采用T型电阻反馈网络的放大电路和由数字系统控制电压增益的运放电路 .该电路通过模拟开关可以很方便地与数字电路联系起来 ,完成显示放大倍数等要求 ,是具有一定使用价值的电路
General op amp for circuit measurement, amplifier circuit design, often require a higher magnification or according to certain requirements to adjust its magnification.According to the practical application of these problems, the T-resistance network in the operational amplifier circuit Based on the analysis of the test results, two kinds of circuits with practical value are obtained: the amplifying circuit with T-type resistive feedback network and the op amp circuit with the voltage gain controlled by the digital system. Circuit through the analog switch can be easily linked with the digital circuit to complete the display magnification and other requirements, is a certain value of the use of the circuit