tailieunhanh - Circuits & Electronics P19

The Operational Amplifier Abstraction Fall 2000 Lecture 19 1 .Review MOSFET amplifier — 3 ports + + input vI port – + vO output port – VS power port – Amplifier abstraction VS + vI – + + v – O vI vO Function of vI – Fall 2000 Lecture 19 2 .Review vI vO Function of vI Can use as an abstract building block for more complex circuits (of course, need to be careful about input and output). Today Introduce a more powerful amplifier abstraction and use it to build more complex circuits. Reading: Chapter 15 from A & L. Fall 2000 Lecture 19 3 .Operational Amplifier Op Amp VS power port output port + – + – input port + – −VS More abstract representation: + vIN –. | CIRCUITS AND ELECTRONICS The Operational Amplifier Abstraction Fall 2000 Lecture 19 1 Review MOSFET amplifier 3 ports o o o . . input Port output o port V power s port o Amplifier abstraction vs v Vi o o o o VI V Function of VI Fall 2000 Lecture 19 2 Review vi vo Function of vI Can use as an abstract building block for more complex circuits of course need to be careful about input and output . Today Introduce a more powerful amplifier abstraction and use it to build more complex circuits. Reading Chapter 15 from A L. Fall 2000 Lecture 19