LOW POWER BIAS CURRENT GENERATOR AND VOLTAGE REFERENCE

摘要

A bias current generators that may be implemented in low power environments is described. The current generator can be implemented without using resistors and may be used to generate reference currents and voltages. It may also be used to generate voltage references where the output of the circuit is to at least a first order temperature independent.

主权项

1. A bias current generator comprising:
a first bipolar transistor and a second bipolar transistor, the second bipolar transistor configured to operate with a different collector current density than the first bipolar transistor to generate a ΔVBE voltage that is a difference in base-emitter voltages of the first and second bipolar transistors; a plurality of stacked metal oxide semiconductor (MOS) devices biased in a transistor triode operating region and operatively coupled to the first and second bipolar transistors; and to generate a reference bias current determined by the ΔVBE voltage and an on resistance of the stacked MOS devices.