Operational Amplifiers

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Operational Amplifiers

Classroom lecture on operational amplifiers and amplifier models. Ideal operational amplifier, T-Network, and linear small-signal equivalent circuit models. Design and analysis of summing, non-inverting, difference, log and anti-log amplifiers. Op-amp applications, transfer characteristics, current mirror and basic differential pair, non-ideal effects, feedback and stability are discussed. Ideal op-amps and operational amplifier model, current-to-voltage and voltage-to-current converters, integrator and differentiator amplifiers, circuit design, BJT Bipolar transistor current mirror, BJT differential pair, small signal equivalent circuit analysis, differential and common mode gains, input impedances, amplifier feedback and stability, ideal closed-loop signal gain, gain sensitivity, bandwidth extension, Bode Plots, Pole Amplifier, phase gain and phase margins, frequency compensation theory, closed-loop frequency response, Miller Effects, Miller Compensation, non-ideal amplifier effects, finite open-loop gain, inverting and non-inverting closed-loop gain, non-zero output resistance, offset voltages, bias currents, slew rate, amplifier temperature effects and CMRR.

Course Topics

Introduction to Operational Amplifiers
Ideal Operational Amplifier
Ideal Operational Amplifier Model
Inverting Amplifier
Amplifier with T-Network

Summing Amplifier
Non-Inverting Amplifier
Op-Amp Applications
Current to Voltage Converter
Voltage to Current Converter
Difference Amplifier
Instrumentation Amplifier

Integrator and Differentiator
Practical Integrator
Practical Differentiator
Log Amplifier
Anti-Log Amplifier
Op-Amp Circuit Design

Bipolar Transistor Current Mirror
Basic BJT Differential Pair

DC Transfer Characteristics
Small Signal Equivalent Circuit Analysis
Differential and Common Mode Gain
Common Mode Rejection Ratio (CMRR)
Differential and Common Mode Input Impedances

Feedback and Stability
General Feedback Theory
Ideal Closed Loop Signal Gain
Gain Sensitivity
Bandwidth Extension
Stability
The Stability Problem
Bode Plots and Pole Amplifiers

Phase and Gain Margins
Frequency Compensation
Basic Theory
Closed Loop Frequency Response
Miller Compensation

Non Ideal Effects
Finite Open Loop Gain
Inverting Amp Closed Loop Gain
Non Inverting Amp Closed Loop Gain
Inverting Amp Closed Loop Input Resistance
Non Inverting Amp Closed Loop Input Resistance
Non Zero Output Resistance

Input Offset Voltage
Input Bias Currents
Frequency Response
Slew Rate
Temperature Effects and CMRR

Homework

Exams & Tests

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