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ECE201Lect-13

# ECE201Lect-13 - ECE201 Lect-13 1 Thévenin's Theorem(5.3...

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Unformatted text preview: ECE201 Lect-13 1 Thévenin's Theorem (5.3, 8.8) ECE201 Lect-13 2 Thevenin’s Theorem • Any circuit with sources (dependent and/or independent) and resistors can be replaced by an equivalent circuit containing a single voltage source and a single resistor. • Thevenin’s theorem implies that we can replace arbitrarily complicated networks with simple networks for purposes of analysis. ECE201 Lect-13 3 Implications • We use Thevenin’s theorem to justify the concept of input and output resistance for amplifier circuits. • We model transducers as equivalent sources and resistances. • We model stereo speakers as an equivalent resistance. ECE201 Lect-13 4 Independent Sources (Thevenin) Circuit with independent sources R Th V oc Thevenin equivalent circuit + – ECE201 Lect-13 5 No Independent Sources Circuit without independent sources R Th Thevenin equivalent circuit ECE201 Lect-13 6 Example: CE Amplifier 1k Ω V in 2k Ω +10V + – V o + – ECE201 Lect-13 7 Small Signal Equivalent 1k Ω V in 100 I b + – V o 50 Ω I b 2k Ω + – ECE201 Lect-13 8 Thevenin Equivalent @ Output 1k Ω V in 100 I b +- V o 50 Ω I b 2k Ω R Th V oc + – V o + – + – ECE201 Lect-13...
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ECE201Lect-13 - ECE201 Lect-13 1 Thévenin's Theorem(5.3...

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