Non-Inverting Integrators Are Not Really Integrators (Part 1)

by Gregory Mirsky, Design Engineer, Deer Park, Ill., How2Power Today, May 15 2025

Focus:
Integrators find use in a variety of electronic devices, sometimes to perform a mathematical operation of integrating analog signals. Although the typical integrator is based on an inverting amplifier, some authors have presented non-inverting schemes. However, the transfer function of a non-inverting integrator contains a zero at the pole frequency, thus destroying the integration function. In this article series, the author analyzes various forms of inverting and non-inverting integrator circuits to confirm this problem and then presents examples that illustrate the differences in performance. Part 1 analyzes the responses of inverting integrators with and without phase correction.

What you’ll learn:

• How to verify the response of the integrating inverter.
• How to analyze the effect of phase correction on the integrating inverter

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