20-Gb/s 1:2 demultiplexer in 0.18-μm CMOS

A 1:2 demultiplexer (DEMUX) was designed in a standard 0.18-μm CMOS process. A conventional current-mode-logic (CML) latch was improved to realize the core of the DEMUX for a better waveform. The results show that this DEMUX can operate at the data rate of 20 Gb/s. Under a 1.8-V supply, the whole circuit consumes 78 mA, in which the core circuit accounts for about 28%.