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Introduction to Operational Amplifiers

Basic Op Amp Configurations

Last modified by Microchip on 2025/09/15 13:56
   Settling Time and Overshoot  Closed Loop Configuration   
Basic Non-Inverting Op Amp Configuration

Figure 1: Basic Non-Inverting Op-Amp Configuration

This part of the class explains the negative feedback in op amp circuits and how to compute basic parameters for the basic op amp configurations. You will learn how to:

  • Analyze three op amp configurations including inverting and non-inverting amplifiers (Figure 1), and voltage followers
  • Describe impedances of these basic op amp configurations
  • Troubleshoot op amp circuits

Key Concepts

  • Op amp configurations with negative feedback
  • Op amp impedances
  • Troubleshooting op amp amplifiers
  • Non-inverting amplifiers
  • Inverting amplifiers
  • Voltage followers
  • Closed-loop voltage gain
  • The non-inverting amplifier has a minimum voltage gain of unity
  • An inverting amplifier can provide gain or attenuate the output
  • The output of an inverting amplifier is 180° out of phase with the input
  • A voltage follower always has a gain of 1
  • All op amps have designed input and output impedances
  • The use of negative feedback has a major impact on the input and output impedance that can be far different than the design parameters

Op amps can be connected in closed-loop or open-loop configurations.