Linear ICs (Integrated Circuits) are electronic devices consisting of a set of transistors, resistors, and other components that are interconnected in a specific way to perform a specific function. They are called “linear” because the output of the circuit is directly proportional to the input, which means that the output voltage or current is a linear function of the input voltage or current.

Linear ICs are used in a wide variety of applications, including amplifiers, filters, power supplies, and other circuits that require a linear response to input signals. They are widely used in electronics as they are small, inexpensive and easy to manufacture and can be used to perform a wide variety of functions.

There are many different types of linear ICs, including operational amplifiers, voltage regulators, and comparators. Each type of linear IC is designed to perform a specific function and can be used in combination to create more complex circuits.