1 Tai-Cheng Lee Fall 2007 Operational Amplifiers Tai-Cheng Lee Electrical Engineering/GIEE, NTU.

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Tai-Cheng LeeFall 2007

Operational Amplifiers

Tai-Cheng LeeElectrical Engineering/GIEE, NTU

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Ideal Op Amp Characteristics

• Ideal op amp

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Differential and Common-Mode Signal

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Inverting Configuration

• 2.2 Inverting amplifiers

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Inverting Amplifier with Finite OP Gain

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Weighted Summer-(1)

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Weighted Summer-(2)

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Noninverting Configuration

• 2.3 Noninverting amplifiers

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Voltage Follower

• Source follower

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Difference Amplifier

• 2.4 Differential Amplifier

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Common-Mode Rejection Ratio

• CMRR

• Single op-amp difference amplifier

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Superposition in Difference Amplifier-(1)

• Differential Signal

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• Common-Mode Signal

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• Input Impedance

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Instrumentation Amplifier-(1)

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• If signals are in differential

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• Advantages and disadvantages

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Non-Ideal Effect in Op Amp–(1)

• Finite bandwidth

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Non-Ideal Effect in Op Amp–(2)

• Finite gain

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Large-Signal Analysis

• Vmax and Vmin for op amp

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Slew Rate-(1)

• Maximum rate of changes at the output

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Slew Rate-(2)

• Full-Power Bandwidth

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DC Imperfection

• 2.7 DC Imperfection

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DC Offset-(1)

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DC Offset-(2)

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Input Bias and Offset Current-(1)

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Integrator and Differentiator

• 2.8 Inverting configuration with general impedances

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Integrator-(1)

• The inverting integrator

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Integrator-(2)

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Integrator-(3)

• Lossy integrator

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Differentiator

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Op Amp Macromodel-(1)

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Op Amp Macromodel-(2)

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