This paper proposes the design of new digital controller to improve control performance of automation system. The proposed controller improves response time and steady state error in the driving a system to generate a output voltage proportional to the frequency difference of reference input signal and feedback signal, holds good stability and higher accuracy designing an adaptive line density selector and a quantized level controller of slope-varied type. A theoretical and experimental studies have been carried out. Th presented results how the improved performance in the position control of automation system.