回转器及其应用 - CORE.PDF

36 仪表技术与传感器 2000 年 110015 =、、 。,、 。。 : Gyrator and Its Applications Yan Kuichen Wang Xiaohui Li Shuo Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110015 Abstract:This paper introduces a ne method for implementing the long time constant in the circuitsof automation, appara2 tus, signal conversion, collecting and processing of sensor. ssignal, etc. It is possible to simulate the capacitanceor the inductance utilizing the operational amplifiers, the resistors, and the capacitors based on the principle of gyrator in the theories of neoteric electrotechnics. The theoretical calculations and applied examples are presented simultaneously in this paper. Key Words: Gyrator, Simulative Capacitance, Simulative Inductance, Operational Amplifier 1 想的, 由图1a 所设定的电流方向, 可列出如下几个方程: 在工业控制中, 常常会遇到一些变化极其缓慢的 V i I 2 = ( 1) 信号。对这些信号 行收集、处理以及控制时, 往往需 R 2 + 1 j XC 要极低频率的信号源和时间常数很大的滤波器, 也需 1 Vi - I 2 # 要超长延时的控制处理电路。根据近代电工理论中的 V - V i o j XC