Upto 73 Op-Amp Circuit Collection - PDF

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This application note come from National Semiconductor and contains more than 73 circuit diagrams. You can download it from the bottom of this post. An operational amplifier, which is often called an op-amp, is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output. An op-amp produces an output voltage that is typically millions of times larger than the voltage difference between its input terminals.

Typically the op-amp's very large gain is controlled by negative feedback, which largely determines the magnitude of its output ("closed-loop") voltage gain in amplifier applications, or the transfer function required (in analog computers). Without negative feedback, and perhaps with positive feedback for regeneration, an op-amp essentially acts as a comparator. High input impedance at the input terminals (ideally infinite) and low output impedance at the output terminal(s) (ideally zero) are important typical characteristics.
Section 1—Basic Circuits

1. Inverting Amplifier
2. Non-Inverting Amplifier
3. Difference Amplifier
4. Inverting Summing Amplifier
5. Non-Inverting Summing Amplifier
6. Inverting Amplifier with High Input Impedance
7. Fast Inverting Amplifier with High Input Impedance
8. Non-Inverting AC Amplifier
9. Practical Differentiator
10. Integrator
11. Fast Integrator
12. Current to Voltage Converter
13. Circuit for Operating the LM101
14. without a Negative Supply
15. Circuit for Generating the Second Positive Voltage
16. Neutralizing Input Capacitance to Optimize Response Time
17. Voltage Comparator for Driving DTL or TTL Integrated Circuits
18. Integrator with Bias Current Compensation
19. Threshold Detector for Photodiodes
20. Double-Ended Limit Detector
21. Multiple Aperture Window Discriminator
22. Offset Voltage Adjustment for Inverting Amplifiers Using Any Type of Feedback Element
23. Offset Voltage Adjustment for Non-Inverting Amplifiers Using Any Type of Feedback Element
24. Offset Voltage Adjustment for Voltage Followers
25. Offset Voltage Adjustment for Differential Amplifiers
26. Offset Voltage Adjustment for Inverting Amplifiers Using 10k Source Resistance or Less

Section 2 — Signal Generation

1. Low Frequency Sine Wave Generator with Quadrature Output
2. High Frequency Sine Wave Generator with Quadrature Output
3. Free-Running Multivibrator
4. Wein Bridge Sine Wave Oscillator
5. Function Generator
6. Pulse Width Modulator
7. Bilateral Current Source
8. Wein Bridge Oscillator with FET Amplitude Stabilization
9. Low Power Supply for Integrated Circuit Testing
10. Positive Voltage Reference
11. Negative Voltage Reference
12. Precision Current Sink
13. Precision Current Source

Section 3 — Signal Processing

1. Differential-Input Instrumentation Amplifier
2. Variable Gain, Differential-Input Instrumentation Amplifier
3. Instrumentation Amplifier with ±100 Volt Common Mode Range
4. Instrumentation Amplifier with ±10 Volt Common Mode Range
5. High Input Impedance Instrumentation Amplifier
6. Bridge Amplifier with Low Noise Compensation
7. Bridge Amplifier
8. Precision Diode
9. Precision Clamp
10. Fast Half Wave Rectifier
11. Precision AC to DC Converter
12. Low Drift Peak Detector
13. Absolute Value Amplifier with Polarity Detector
14. Sample and Hold
15. Low Drift Integrator
16. Fast Summing Amplifier with Low Input Current
17. Fast Integrator with Low Input Current
18. Adjustable Q Notch Filter
19. Easily Tuned Notch Filter
20. Tuned Circuit
21. Two-Stage Tuned Circuit
22. Negative Capacitance Multiplier
23. Variable Capacitance Multiplier
24. Simulated Inductor
25. Capacitance Multiplier
26. High Pass Active Filter
27. Low Pass Active Filter
28. Nonlinear Operational Amplifier with Temperature Compensated Breakpoints
29. Current Monitor
30. Saturating Servo Preamplifier with Rate Feedback
31. Power Booster
32. Analog Multiplier
33. Long Interval Timer
34. Fast Zero Crossing Detector
35. Amplifier for Piezoelectric Transducer
36. Temperature Probe
37. Photodiode Amplifier
38. High Input Impedance AC Follower
39. Temperature Compensated Logarithmic Converter
40. Root Extractor
41. Multiplier/Divider
42. Cube Generator
43. Fast Log Generator
44. Anti-Log Generator

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