Balun

A balun (balanced-to-unbalanced) is an electronic device that converts between a balanced signal and an unbalanced signal. It is commonly used in RF (radio frequency) and audio applications to connect balanced and unbalanced devices, such as microphones and amplifiers, or transmission lines and antennas. A balun typically consists of a transformer or other passive components that are designed to match the impedance of the balanced and unbalanced components. The specific design and operating characteristics of a balun depend on the intended application and operating frequency range. In addition to its signal conversion function, a balun can also provide impedance matching, isolation, and common-mode rejection to improve the performance and reliability of a system.