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Unformatted text preview: 1 Operational Amplifiers ( Op Amp ) V (I) controlled V (I) source Active or passive element ? Perform math operations Addition Subtraction Multiplication Division Integration 1 BME 311 Network Theory John X.J. Zhang, UT Austin Integration Differentiation Key Points of Chap. 5 Ideal Op Amp Op Amp math operations Inverting Amp Noninverting Amp Summing Amp Difference Amp Cascaded Op Amp 2 BME 311 Network Theory John X.J. Zhang, UT Austin Cascaded Op Amp 2 Op Amp: Circuit Symbol 3 BME 311 Network Theory John X.J. Zhang, UT Austin 8pin DIP: D ual I nline P ackage Can we apply KCL on OpAmp ? Inside of an OpAmp 4 BME 311 Network Theory John X.J. Zhang, UT Austin 3 Op Amp Nonideal Equivalent Circuit v d =v 2v 1 R i : input Thevenin equivalent resistance (ideal value=?) R o : output Thevenin equivalent resistance (ideal value=?) v =Av d =A(v 2v 1 ) 5 BME 311 Network Theory John X.J. Zhang, UT Austin o A : openloop voltage gain (ideal value=?) unit: dB=20 log 10 (A) Is Op Amp a liner system ?...
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 Spring '08
 Zhang

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