A Low Temperature Coefficient Reference Voltage Source Compensated by MOS Device
Sun Jie-ji · Science Technology and Engineering · 2013
A high-precision,low temperature coefficient band-gap reference voltage source based on TSMS 0. 5μm 2P2M CMOS high voltage mixed signal process is presented. To to reduce the temperature coefficient,MOS device and its I D-V GS relationship is used to compensate the sec-ond order,not the traditional pattern of feedback amplifier,which greatly simplifies the circuit structure. At the same time problems caused by the amplifier disorder are omitted. Software Cadence and Spectre were used to complete the design,simulation and verification. Results show that when the power supply is 6 V,the reference voltage is 1. 2 V,temperature coefficient is 1. 4 × 10-6( ppm) /℃ in the temperature range from-30 ～130 ℃,power supply rejection ratio is -60 dB at low frequency,power consumption is 0. 18 mW.