Lecture_9 - Operational Amplifiers (Op Amp) V (I)...

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1 BME 311 Network Theory John X.J. Zhang, UT Austin 1 Operational Amplifiers ( Op Amp ) • V (I) controlled V (I) source – Active or passive element ? • Perform math “operations” – Addition – Subtraction – Multiplication – Division – Integration – Differentiation BME 311 Network Theory John X.J. Zhang, UT Austin 2 Key Points of Chap. 5 • Ideal Op Amp • Op Amp math “operations” – Inverting Amp – Non-inverting Amp – Summing Amp – Difference Amp – Cascaded Op Amp
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2 BME 311 Network Theory John X.J. Zhang, UT Austin 3 Op Amp: Circuit Symbol 8-pin DIP: Dual In-line package Can we apply KCL… on Op-Amp ? BME 311 Network Theory John X.J. Zhang, UT Austin 4 Inside of an “Op-Amp”
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3 BME 311 Network Theory John X.J. Zhang, UT Austin 5 Op Amp “Non-ideal” Equivalent Circuit R i : input Thevenin equivalent resistance (ideal value=?) R o : output Thevenin equivalent resistance (ideal value=?) A : open-loop voltage gain (ideal value=?) unit: dB=20 log
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Lecture_9 - Operational Amplifiers (Op Amp) V (I)...

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