The circuit shown below is that of a source follower configu

The circuit shown below is that of a source follower configuration, where the output
follows the input voltage minus a level shift. The amount of level shift is a function of thedevice W/L and Ibias as well as the back bias effect of M1 (i.e. VSB ?0). Assume,Vt0=0.4V, kn’=300?A/V2 , ?=0.5, 2?b=0.6V, and ?=0, VDD=1.8V, Ibias=6mA

Solution

A level shifter is usually a part that converts digital signals from one logic standard to another. It might also be called a translator. For example, the MC14504B converts TTL logic signals to CMOS levels, and a MC10H607 converts PECL signals to TTL