Analysis and Design of CMOS Source Followers and Super Source Follower
نویسنده
چکیده
The source follower circuit is used as a voltage buffer and level shifter. It is more flexible level shifter as the dc value of voltage level can be adjusted by changing aspect ratio of MOSFETs. It is desired to have low output resistance for such applications. Source follower can give minimum output resistance 1/(gm+gmb) with load resistance and channel resistance tending to infinity. The super source follower is a circuit formed using negative feedback through another MOSFET. This offers even reduced output resistance but with reduced voltage gain as that of source follower.
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