A low power 12Gb/s 1:4 demultiplexer in 0.18μm CMOS

Abstract

To reduce the power consumption, a tree-type and half-rate 1:4 demultiplexer is designed by employing all-CMOS logic in whole circuit. The proposed circuit is realized in TSMC 0.18ȝm CMOS process. The post simulated result shows that the fully integrated 1:4 DEMUX operates well up to 12Gb/s at a supply voltage of 1.8V, and the peak-to-peak value of output voltage swing is 400mV on an external 50 Ohm load. The total power consumption of the DEMUX is 56mW at 12 Gb/s. The overall chip has a size of 0.475×0.475mm 2 and the core size is 0.14mm×0.12mm.