Thermal analysis of energy efficient clock gated arithmetic logic unit on FPGA

Abstract

This paper, deals with Thermal Analysis of Energy Efficient Clock Gated Arithmetic Logic Unit on FPGA for reduction of leakage power and total power consumption and it has been analyzed that there is reduction in Leakage Power when ambient temperature decreases from 50 degree Celsius to 20 degree Celsius. Virtex-6 is 40-nm FPGA, on which Thermal Analysis of Energy Efficient Clock Gated Arithmetic Logic Unit has been analyzed with device operating frequency is 1GHz. This reduction in leakage power is analyzed on arithmetic and logic unit with latch free clock gating technique and on arithmetic and logic unit with latch based clock gating technique. There is significant Leakage power reduction by varying ambient temperature. With Latch free clock gating technique in Low Power Arithmetic and Logic Unit the Contribution of leakage power was 1.327W, when Ambient Temperature is 50 degree Celsius, which is further reduced to 1.246W at 40 degree Celsius Ambient Temperature, 1.176W at 30 degree Celsius Ambient Temperature, 1.114W at 20 degree Celsius Ambient Temperature. With Latch based clock gating technique in Low Power Arithmetic and Logic Unit the Contribution of leakage power was 1.328W When Ambient Temperature is 50 degree Celsius, which is further reduced to 1.247W at 40 degree Celsius Ambient Temperature, 1.177W at 30 degree Celsius Ambient Temperature, 1.115W at 30 degree Celsius Ambient Temperature. So, there is reduction in leakage power in energy efficient arithmetic and logic unit.