Reference voltage generator with improved performance, uses current mirror circuit with resistor varying with absolute temperature in tail, and output operational amplifier providing feedback to current mirror

摘要

The reference voltage generator has an input stage (1), with a resistor (R0) varying with absolute temperature, delivering a potential independent of temperature, connected to an operational amplifier (2) delivering a reference voltage (Vref) that is fed back (3) to the input stage. The operational amplifier is chosen so the reference potential is stable in both open- and closed-loop operation.