A voltage reference, also known as a reference voltage, is an electronic circuit that produces a fixed reference voltage that is used as the basis for a measurement of a specific parameter. As an example, it is often used to measure current, temperature and other parameters. The voltage reference is used to provide a consistent and reliable voltage level for a wide range of measurement applications. Voltage references can also be used for other purposes such as setting the output voltage level of a voltage regulator. They are designed to maintain a steady and precise voltage reference regardless of changes in current and other external conditions. They function as an independent source of power that provides a consistent reference point that can be used for accurate measurement and control.