Driver circuits for temperature-invariant performance of junction diodes

Different types of driver circuits for the temperature-invariant brightness of light emitting diodes and the RF performance of Schottky barrier diodes, p-i-n diodes and p-n junction diodes are presented. The sensitivities of the proposed driver circuits with ambient temperature, bias voltage and other component variations are presented. Novel techniques are proposed and demonstrated to compensate the performance variation of diode-based circuits due to the temperature sensitivity of the components of driver circuits. The proposed driver circuits eliminate the requirement of conventional temperature compensation techniques with temperature sensors. The driver circuits respond directly to the junction temperature of the diodes itself; thus, there will be no compensation error due to the temperature gradient or self-heating of the diodes. This technique is very simple, accurate and easy to implement.