A Simple Method to Measure the Depletion Capacitance of a Schottky Junction Diode

Abstract

A simple laboratory method to measure junction capacitance of a Schottky barrier diode has been proposed from the measurement of cut off frequency of a high pass filter. Existence of series and shunt resistances associated with depletion capacitance may be ignored in some special conditions. Theoretical analysis for the measurement of junction capacitance has been carried out. Junction capacitance of a Schottky diode is evaluated from the filter circuit at different applied reverse bias and a good capacitance voltage characteristic has been found from the experimental result