Detector diode — SUNMATE

Detector diode

Understand detector diode

The main function of the detector diode is to detect the low-frequency signal in the high-frequency signal. Their structure is point contact type, so their junction capacitance is small and their operating frequency is high. It is generally made of germanium. In principle, the modulated signal taken from the input signal is the detection, and the value of the rectified current (100mA) is taken as the boundary, and the output current is usually less than 100mA, which is called the detection. Germanium point contact type, operating frequency up to 400MHz, small forward voltage drop, small junction capacitance, high detection efficiency, good frequency characteristics, is 2AP type. The diode used for detection like the point contact type can be used for limiting, clipping, modulation, mixing, switching and other circuits in addition to detection. There are also two diode assemblies with good consistency for FM detection.