Enhancement of Tri-Model Switch for Low Power VLSI Application Using HDL

Power reduction is one of the biggest challenges in CMOS integrated circuit design. Optimization of power is inevitable in order to reduce package cost and extended battery life. As a switch tri-modal MTCMOS (Multi Threshold CMOS switch) can be considered as a low power solution for data retentive power gating applications. In MTCMOS, transistors with multiple threshold voltages are used in order to optimize power. The tri-modal switch provides three different power modes: active, drowsy and sleep. Drowsy mode has been introduced in this work which avoids the loss of data before the system going to sleep mode. The proposed system is useful for data-retention application which will replace the existing retention flip flops and thereby reduce the area.