BICMOS BANDGAP VOLTAGE REFERENCE WITH BASE CURRENT COMPENSATION

The effect of base current on the relationship between reference and o utput voltages in a bandgap voltage reference circuit is considered. T he modifications developed to compensate for this influence in a stand ard reference circuit are described. The compensation is achieved by m easuring the collector current of one of the transistors, creating a p ositive temperature coefficient current and introducing a p-channel cu rrent doubler in the base circuit of the measuring transistor. The sim ulation results demonstrate the efficiency of the proposed improvement .