ECE201_28_Jung

ECE201_28_Jung - ECE 201 Lecture 28 Announcements Last...

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ECE 201 Lecture 28 Announcements Last Lecture #27: Examples: Summing circuit Difference circuit Preamplifier Saturation This Lecture #28: Thevenin’s and Norton’s Theorems for operational amplifiers (op-amp) D/A converters
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Superposition: Difference Amplifier Revisited + + + (Virtual ground) + + + +
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Review of Equivalent Circuit Model Linear passive two-terminal network Thevenin equivalent circuit Linear passive two-terminal network Norton equivalent circuit Exception: when the v-i characteristic is vertical Exception: when the v-i characteristic is horizontal with all independent sources set to zero with all independent sources set to zero
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Thevenin’s Theorem for Active Networks (Thevenin Theorem) A “linear” active two- terminal network is equivalent to an independent voltage source V in series with a resistance R Exception: v-i characteristic of the active network has slope The value of R can be negative Linear active two-terminal network Thevenin equivalent circuit Active devices : Diode, transistors, amplifiers
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ECE201_28_Jung - ECE 201 Lecture 28 Announcements Last...

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