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提出一种实现精密全波整流的新方法。该电路的最大特点是用一对NPN和PNP晶体管代替二极管整流,从而实现用一个运算放大器、一对NPN和PNP晶体管及两个电流镜构成的精密全波整流电路。文中分析了电路的工作原理,并对由分立元件构成此电路及将该电路单片集成时应注意的问题进行了讨论。实验上将此电路与其他类型的精密全波整波电路进行比较。测量结果显示出该电路有许多优点。
A new method of implementing full-wave rectification is proposed. The most notable feature of this circuit is the use of a pair of NPN and PNP transistors instead of diode rectification to achieve a precision full-wave rectification circuit with an op amp, a pair of NPN and PNP transistors and two current mirrors. In this paper, the working principle of the circuit is analyzed, and the problems that should be noticed when the circuit is composed of discrete components and the circuit is monolithically discussed. Experimentally compares this circuit with other types of precision full-wave rectification circuits. The measurement shows that the circuit has many advantages.