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► BASIC OP AMP MODEL - Level 1 You've probably seen op amps in a variety of applications, but how do you simulate them? Here's a good place to start - the three basic stages of an op amp: 1) Differential Amplifier, 2) Gain / Frequency Response and 3 ) Output Buffer. Using basic SPICE devices, this model helps you simulate the frequency response and DC accuracy of your amplifier.
► INTERMEDIATE MODEL - Level 2 This SPICE model (Boyle type) looks similar to ones created by many op amp manufacturers using a transistor front-end. Only slightly more complex than the basic op amp, it models several key behaviors including slew rate limiting. Another main benefit is that many advanced behaviors - voltage and current limit, CMR behavior, additional poles and zeros - can be easily added to this model (see Level 3 model below.) You can download an Excel spreadsheet that calculates the component values given an op amp's specifications.
► ADVANCED COMPONENTS - Level 3 Learn to model advanced analog behaviors with the Level 3 Op Amp models. Each SPICE file below adds an advanced function - one at a time - to the Level 2 Op Amp Model. Take the functions you need, modify them if you like, or create your own op amp model.
► EASY-TO-USE FUNCTIONS Here are some alternative - and typically simpler - ways to implement various op amp functions.
OP AMP MODEL SUMMARY
LTSPICE OP AMP MODELS Solve 10 Op Amp Design Issues using Custom LTSPICE MODELS.
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