Abstract: The comparison method of ＂voltage ratio equaling resistance ratio＂ is used to measure the voltagecurrent characteristic of light emitting diode. The experimental results indicate that the method of ＂voltage ratio equaling resistance ratio＂cn be used to simply and conveniently measure the voltage-current characteristic of nonlinear element.

Key words: comparison method, voltage ratio equaling resistance ratio, nonlinear element, voltage- current characteristic