1. Non-linear Op-Amp Circuits Tim

2. Content 1 Introduction 2 Zero Crossing Detector – 2.1 Non-Inverting Zero Crossing Detector 2.1 Non-Inverting Zero Crossing Detector – 2.2 Inverting Zero Crossing Detector 2.2 Inverting Zero Crossing Detector 3 Schmitt Trigger Circuit 4 Astable Multivibrator Using Op-Amp 5 Op-amp Monostable Multivibrator

3. 1. Introduction Operational amplifiers, along with linear circuits, are also vastly used to configure non-linear circuits, i.e. circuits whose output exhibits non-linear change with respect to the change in the input. These circuits are commonly known as switching circuits, whose output switches between positive and negative saturation voltage levels. Most popularly used circuit configurations are zero crossing detectors, the Schmitt trigger, astable and monostable multivibrators.

4. 2. Zero Crossing Detector A zero crossing detector is the simplest circuit configurations of op-amp switching circuits. In this configuration, the input signal is applied to one of the input terminals while the other input is connected to ground. This circuit needs no feedback connection.

5. Non-Inverting Zero Crossing Detector