Is there any advantage of the following op amp based voltage follower:-
over one made with discrete MOSFET components such as:-
other than component count?
Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up.Sign up to join this community
Yes opamps are better. the opamp is two components: the opamp and the bypass capacitor. the mosfet follower is 5 components.
Additionally, opamps have lower offset voltages and better linearity, and better accuracy because of large amounts of negative feedback.
The only case where I would use a discrete follower would be with high voltages. Because it is more difficult to get high-voltage opamps that are cheap.