The P.I.D. Controller is designed to be used as a core unit in the implementation of control systems containing analog feedback loops. It contains a P.I.D. (Proportional, integral, Derivative) amplifiers section which is used to condition the analog control signal with proportional, integral and derivative effect. The gain of each of these amplifiers can be varied independently to control these effects.

The other sections include circuit elements to achieve feedback signal amplification, signal rectification, low-pass filtering, error detection and output signal summation and limiting. The limiting section includes an “Anti-Reset” circuit which prevents the integrating amplifier in the P.I.D. Amplifier’s section from saturating. All these elements can easily be interconnected through the use of miniature 2 mm banana plug connection leads.