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Op Amp Circuit Collection

Op Amp Circuit Collection

National Semiconductor Application Note 31 September 2002

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

00705702 00705701

Difference Amplifier

Inverting Summing Amplifier00705703 00705704

R5 = R1//R2//R3//R4 For minimum offset error due to input bias current

For minimum offset error due to input bias current

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© 2002 National Semiconductor Corporation

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Section 1—Basic Circuits

(Continued) Inverting Amplifier with High Input Impedance

Non-Inverting Summing Amplifier

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*RS = 1k for 1% accuracy00705706

*Source Impedance less than 100k gives less than 1% gain error.

Fast Inverting Amplifier with High Input Impedance

Non-Inverting AC Amplifier

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Section 1—Basic Circuits
Practical Differentiator

(Continued) Integrator

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For minimum offset error due to input bias current

Fast IntegratorCurrent to Voltage Converter

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VOUT = lIN R1 *For minimum error due to bias current R2 = R1

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Section 1—Basic Circuits

(Continued) Circuit for Generating the Second Positive Voltage

Circuit for Operating the LM101 without a Negative Supply

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Neutralizing Input Capacitance to Optimize Response Time

VoltageComparator for Driving DTL or TTL Integrated Circuits

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Threshold Detector for Photodiodes

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Integrator with Bias Current Compensation

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00705716

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

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Section 1—Basic Circuits

(Continued) Double-Ended LimitDetector

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VOUT = 4.6V for VLT ≤ VIN ≤ VUT VOUT = 0V for VIN < VLT or VIN > VUT

Multiple Aperture Window Discriminator

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Section 1—Basic Circuits

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

Offset Voltage Adjustment for Inverting Amplifiers Using Any Type of Feedback Element00705722

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Offset Voltage Adjustment for Voltage Followers

Offset Voltage Adjustment for Differential Amplifiers

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Section 1—Basic Circuits

(Continued)

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

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Section 2 — Signal Generation
Low Frequency Sine WaveGenerator with Quadrature Output

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Section 2 — Signal Generation

(Continued)

High Frequency Sine Wave Generator with Quadrature Output

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Free-Running Multivibrator

Wein Bridge Sine Wave Oscillator

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*Chosen for oscillation at 100 Hz
00705729

*Eldema 1869 10V, 14 mA Bulb

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Section 2— Signal Generation

(Continued) Function Generator

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Pulse Width Modulator

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Section 2 — Signal Generation
Bilateral Current Source

(Continued) Bilateral Current Source

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Section 2 — Signal Generation

(Continued)

Wein Bridge Oscillator with FET AmplitudeStabilization

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Section 2 — Signal Generation
Low Power Supply for Integrated Circuit Testing

(Continued)

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*VOUT = 1V/kΩ

Positive Voltage Reference

Positive Voltage Reference

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Section 2 — Signal Generation
Negative Voltage Reference

(Continued) Negative...