Circuitos Básicos: Amplificadores Invertidos e Não Invertidos, Diferença, Integradores e R, Notas de estudo de Tecnologia Industrial

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LM

Application Note 31 Op Amp Circuit Collection

Literature Number: SNLA140A

Op Amp Circuit Collection

Note: National Semiconductor recommends replacing 2N2920 and 2N3728 matched pairs with LM394 in all application circuits.

Section 1—Basic Circuits

Inverting Amplifier Non-Inverting Amplifier

00705701

00705702

Difference Amplifier Inverting Summing Amplifier

00705703

For minimum offset error due to input bias current

00705704

R5 = R1//R2//R3//R For minimum offset error due to input bias current

National Semiconductor Application Note 31 September 2002

Op Amp Circuit Collection

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© 2002 National Semiconductor Corporation AN007057 www.national.com

Section 1—Basic Circuits (Continued)

Practical Differentiator Integrator

00705709 00705710

For minimum offset error due to input bias current

Fast Integrator Current to Voltage Converter

00705711

00705712 VOUT = l (^) IN R *For minimum error due to bias current R2 = R

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Section 1—Basic Circuits (Continued)

Circuit for Operating the LM without a Negative Supply

Circuit for Generating the Second Positive Voltage

00705713 00705714

Neutralizing Input Capacitance to Optimize Response Time

00705715

Integrator with Bias Current Compensation

00705716 *Adjust for zero integrator drift. Current drift typically 0.1 n/A˚C over −55˚C to 125˚C temperature range.

Voltage Comparator for Driving DTL or TTL Integrated Circuits

00705717

Threshold Detector for Photodiodes

00705718

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Section 1—Basic Circuits (Continued)

Offset Voltage Adjustment for Inverting Amplifiers Using Any Type of Feedback Element

Offset Voltage Adjustment for Non-Inverting Amplifiers Using Any Type of Feedback Element

00705721

00705722

Offset Voltage Adjustment for Voltage Followers Offset Voltage Adjustment for Differential Amplifiers

00705723

00705724

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Section 1—Basic Circuits (Continued)

Offset Voltage Adjustment for Inverting Amplifiers Using 10 k Ω Source Resistance or Less

00705725

Section 2 — Signal Generation

Low Frequency Sine Wave Generator with Quadrature Output

00705726

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Section 2 — Signal Generation (Continued)

Function Generator

00705730

Pulse Width Modulator

00705731

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Section 2 — Signal Generation (Continued)

Bilateral Current Source Bilateral Current Source

00705732

00705733

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Section 2 — Signal Generation (Continued)

Low Power Supply for Integrated Circuit Testing

00705735

00705791 *V (^) OUT = 1V/kΩ

Positive Voltage Reference Positive Voltage Reference

00705736

00705737

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Section 2 — Signal Generation (Continued)

Negative Voltage Reference Negative Voltage Reference

00705738

00705739

Precision Current Sink Precision Current Source

00705740

00705741

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Section 3 — Signal Processing (Continued)

Instrumentation Amplifier with ± 100 Volt Common Mode Range

00705744 †Matching determines common mode rejection.

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Section 3 — Signal Processing (Continued)

Instrumentation Amplifier with ± 10 Volt Common Mode Range

00705745

High Input Impedance Instrumentation Amplifier

00705746

• †Matching Determines CMRR ‡May be deleted to maximize bandwidth

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Section 3 — Signal Processing (Continued)

Precision AC to DC Converter

00705752 *Feedforward compensation can be used to make a fast full wave rectifier without a filter.

Low Drift Peak Detector

00705753

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Section 3 — Signal Processing (Continued)

Absolute Value Amplifier with Polarity Detector

00705754

Sample and Hold

00705755 *Polycarbonate-dielectric capacitor

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