Operational Amplifiers - Electronics I - Lecture Slides, Slides of Electronics

Topic include in Electronics I are: Introduction, Operation Amplifier, Diodes, Bipolar Junction Transistors and Field Effect Transistors. Key points in this lecture are: Operational Amplifiers, Op-Amp Terminals, Power Supplies, Ideal Op-Amp, Closed-Loop Gain, Virtual Short-Circuit, Virtual Ground, Negative and Positive Feedback, Inverting Closed-Loop Configuration, Effect of Finite Open-Loop Gain

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2012/2013

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Chapter 2 Operational Amplifiers
Introduction
http://engr.calvin.edu/PRibeiro_WEBPAGE/courses/engr311/Handouts/OpAmp-tutorial-1.ppt
Textbook CD
http://www.clarkson.edu/%7Esvoboda/eta/designLab/InvertingAmplifierDesign.html
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Chapter 2 – Operational Amplifiers

Introduction

http://engr.calvin.edu/PRibeiro_WEBPAGE/courses/engr311/Handouts/OpAmp-tutorial-1.ppt

Textbook CD

http://www.clarkson.edu/%7Esvoboda/eta/designLab/InvertingAmplifierDesign.html

The OP-AMP Terminals

Symbol

Power Supplies

Exercise 2.

Analysis of Circuits Containing Ideal OP-AMPS

The Inverting Configuration

The inverting closed-loop configuration.

Closed-Loop Gain

Virtual Short-Circuit

Virtual Ground

Negative and Positive Feedback

Analysis of Circuits Containing Ideal OP-AMPS

The Closed-Loop Gain

Analysis of the inverting configuration

Analysis of Circuits Containing Ideal OP-AMPS

Example 2.

Analysis of Circuits Containing Ideal OP-AMPS

Input and Output Resistances

R i v I i I v I v I R R R o 0

Analysis of Circuits Containing Ideal OP-AMPS

Exercises

Other Applications of the Inverting Configuration

With General Impedances

A difference amplifier.

  • Applications of superposition to the analysis of the current circuit of Fig.

Representation of the common-mode and differential components of the input signal to a difference amplifier. Note that v 1 = v CM - v d/ and v 2 = v CM + v d/2.

(a) A popular circuit for an instrumentation amplifier. (b) Analysis of the circuit in (a) assuming ideal op-amps. (c) To make the gain variable, R 1 is implemented as the series combination of a fixed resister R 1 f and a variable resistor R 1 v. Resistor R 1 f ensures that the maximum available gain is limited.

(a) Unity-gain follower. (b) Input step waveform. (c) Linearly rising output waveform obtained when the amplifier is slew-rate limited. (d) Exponentially rising output waveform obtained when V is sufficiently small so that the initial slope ( wtV ) is smaller then or equal to SR.

Effect of slew-rate limiting on output sinusoidal waveforms.