Proportional Integral Differentiator (PID) is widely used in industrial control applications; Digital PID is complicated and consists of many stages. This paper introduces the design of an analog PID controller by using single active element and implemented in 0.18 mu m CMOS technology. PID is tested by using three structures: Two stage Operational Amplifier with common source buffer stage; Folded cascade Operational Transconductance Amplifier and with a second generation Current Conveyer CCII+. The results taken from the three methods are compared by using both the frequency response and the transient response parameters.