Abstract: Reducing the power consumed by the device is the emerging trend. The aim of this project is to reduce the leakage current of the circuit by using the Sub Clocking technology. It is the process of switching the circuit by means of partially ON to reduce the power consumption. In this paper there are two modes of operation are implemented.1. Half mode operation, 2. Full mode operation. This mode of operation are implemented in the two designing method. Design-1: pMOS and nMOS are connected at the header side of the standard CMOS circuit.Design-2: pMOS and nMOS are connected at the header side of the standard CMOS circuit. pMOS and nMOS transistor at the header and footer side are refer to be as a Sub Clock control unit. Any one of the transistor is ON for a half mode operation and both the transistor are turn ON for full mode of operation. This will done by using the control signal to the unit.