Design of a 3ppm/°C bandgap reference
WU Yu-guan · Microcomputer Information · 2008
A 2nd order temperature compensation bandgap reference circuit is designed here based on the conventional 1st order tem-perature compensation circuit with current-mode.Based on Chartered 0.35μm CMOS process,it’s simulated by cadence spectre.Rsults show that with 2v supply voltage,the Bandgap Reference has a wide output from 100mv to 1.8v.At the same time,an aver-age temperature coefficient about 3ppm/°C is got at the temperature extension from-20-120.