Applications of FET : * As input amplifiers in oscilloscopes, electronic voltmeters and other measuring and testing equipment because high input impedance reduces loading effect to the minimum. * As Constant current source. * They are used to build RF amplifiers in FM tuners and other communication circuits. Because of low noise. * FETs are used in mixer circuits of FM and TV receivers as it reduces inter modulation distortion. * Used as Analog switch. * As a Voltage Variable Resistor (VVR) in operational amplifiers.