A Current-mode PID Controller Using Voltage Differencing Gain Amplifiers

This paper presents an electronically tunable current-mode proportional-integral-derivative (PID) controller based on voltage differencing gain amplifier (VDGA). The circuit structure uses low component count consisting of 2 VDGAs and 2 capacitors, without any resistor, suitable to implement into integrated circuit. This PID controller is independently tunable with electronic method. The simulation results demonstrating the performances of the proposed PID controller are given by PSPICE. Additionally, a closed-loop system as an example is introduced. The closed loop feedback control system of PID controller and low pass filter has total power consumption approximately 5.6mW, at ± 1.5V.