Op Amp Circuit Collection

Op Amp Circuit Collection

National Semiconductor Application Note 31 September September 2002

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

Section Sec tion 1 — Bas Basic ic Cir Circui cuits ts Inverting Amplifier

Non-Inverting Amplifier

O p A m p C i r c u i t C o l l e c t i o n

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Difference Amplifier

Inverting Summing Amplifier

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

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AN007057

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Section Sec tion 1 — Bas Basic ic Cir Circui cuits ts

(Continued)

NonNo n-In Inve vert rtin ing g Su Summ mmin ing g Am Ampl plif ifie ierr

Inve In vert rtin ing g Am Ampl plif ifie ierr wi witth Hig igh h In Inpu putt Im Impe peda danc nce e

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*RS = 1k for 1% accuracy

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

Fast Fast Inve Invert rtin ing g Amp Ampli liffier ier wit with High igh Inpu Inputt Impe Impeda danc nce e

NonNon-In Inve vert rtin ing g AC Ampli mplifi fier er

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Section 1—Basic Circuits

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(Continued)

Practical Differentiator

Integrator

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For minimum offset offset error due to input bias current

Fast Integrator

Current to Voltage Converter

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

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(Continued)

Circuit for Operating the LM101 without a Negative Supply

Circuit for Generating the Circuit Second Positive Voltag Voltage e

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Neutralizing Input Capacitance to Optimize Response Time

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Voltage Comparator 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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(Continued) Double-Ended Limit Detector

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VOUT = 4.6V for V LT VOUT = 0V for V IN

≤

VIN

≤

VUT

< VLT or VIN > VUT

Multiple Aperture Window Discriminator















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(Continued)

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

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

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Offset Offset Voltag Voltage e Adjust Adjustmen mentt for Voltag Voltage e Follow Followers ers

Offset Offset Voltage Voltage Adjust Adjustmen mentt for Differ Different ential ial Amplif Amplifier iers s

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(Continued)

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

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Section 2 — Signal Generation Low Frequency Sine Wave Generator with Quadrature Quadrature Output















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Section 2 — Signal Generation

(Continued)

High Frequency Sine Wave Generator with Quadra Quadrature ture Output

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Free-Running Multivibrator

Wein Bridge Sine Wave Oscillator
















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(Continued) Function Generator

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Pulse Width Modulator Modulator

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(Continued)

Bilateral Current Source

Bilateral Current Source

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(Continued)

Wein Bridge Oscilla Oscillator tor with FET Amplitude Stabilization Stabilization

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(Continued)

Low Power Supply for Integrated Circuit Testing

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Positive Voltage Reference

*VOUT = 1V/k Ω

Positive Voltage Reference















Section 2 — Signal Generation Negative Voltage Reference

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(Continued) Negative Voltage Reference

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Precision Current Sink

Precision Current Source















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Section 3 — Signal Processing Differential-Input Instrumentation Amplifier

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Variable Gain, Differential-Input Instrumentation Amplifier















Section 3 — Signal Processing

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(Continued)

Instrumentation Amplifier with ± 100 Volt Common Mode Range

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†Matching determines common mode rejection.















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(Continued)

Instrumentation Amplifier with ± 10 Volt Common Mode Range

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(Continued)

Bridge Bridg e Amplif Amplifier ier with Low Noise Compensation Compensation

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(Continued)

Precision AC to DC Converter

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
















(Continued)

Absolute Absolu te Value Amplifier with Polarit Polarity y Detect Detector or

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(Continued) Sample and Hold

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*Worst case drift less than 2.5 mV/sec † Teflon, Polyethylene or Polycarbonate Dielectric Capacitor
















(Continued)

Fast† Summin Summing g Amplif Amplifier ier with Low Input Current

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(Continued)

Adjustable Q Notch Filter















Section 3 — Signal Processing Easily Tuned Notch Filter

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(Continued) Tuned Circuit















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(Continued)

Negative Capacitance Multiplier















Section 3 — Signal Processing Simulated Inductor

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(Continued) Capacitance Multiplier















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(Continued)

Nonlinear Operational Amplifier with Temperature Compensated Breakpoints

























































































Op Amp Circuit Collection

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