Patent ID: 8125265
Filing Date: 2012-02-28
Classification: G05F

Abstract:
1. An integrated circuit (IC) fabricated on a semiconductor substrate comprising: first and second bipolar transistors, the base and collector of the first bipolar transistor being coupled to the base of the second bipolar transistor; first and second resistors coupled in series between the emitter of the second bipolar transistor and a ground potential, the first and second resistors having first and second resistance values, R a third resistor coupled between a node and the collector of the second bipolar transistor, the first current flowing through the third resistor when power is supplied to the IC, the third resistor having a third resistance value, R a current mirror coupled to the first and second bipolar transistors such that a first current flows through each of the first and second bipolar transistors when power is supplied to the IC, the first and second resistance values being such that the first current is substantially constant over temperature.