TEMPERATURE-STABLE VOLTAGE REFERENCE CIRCUIT

摘要

A voltage reference circuit is disclosed. The circuit comprises a PTAT bias generator circuit and a band gap transistor voltage system coupled to the operational amplifier system. The band gap voltage system includes at least one diode-connected CMOS transistor. The advantage of this configuration is that the diode-connected CMOS device allows for a lower output voltage level than a bipolar device, particularly at colder temperatures. This allows for lower overall operating voltage for the device. The present invention provides for the creation of a temperature-stable reference voltage at a supply voltage and/or operating temperature lower than conventional circuits.