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Lecture 251 More On Op Amps

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Lecture 252 Review The ideal op amp model leads to the following conditions: i + = i - = 0 v + = v - The op amp will set the output voltage to whatever value results in the same voltages at the inputs.

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Lecture 253 Review To solve an op amp circuit, we usually apply KCL at one or both of the inputs. We then invoke the consequences of the ideal model. We solve for the op amp output voltage.

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Lecture 254 The Voltage Follower v in + - + - v out + -

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Lecture 255 What is the relationship between v out and v in ?

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Lecture 256 Why Use a Voltage Follower?

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Lecture 257 Without a Voltage Follower v A/D is not equal to v s vsvs + - RsRs R A/D + - v A/D Sensor A/D Converter

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Lecture 258 With a Voltage Follower v A/D is equal to v s vsvs + - RsRs Sensor R A/D + - v A/D A/D Converter + -

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Lecture 259 An Integrator - + V in + - + - V out R C

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Lecture 2510 KCL at the Inverting Input - + v in (t) + - + - R C v out (t) iR(t)iR(t) iC(t)iC(t) i-i-

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Lecture 2511 KCL

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Lecture 2512 Solve for v out (t)

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