A Dual-Output Voltage Reference for High-Accuracy Pipelined ADC

摘要

A Dual-Output voltage bandgap reference has been designed for high-accuracy pipelined ADC with CSMC0.6 process technology in this work. Based on the temperature and noise analyzing of voltage reference,the traditional circuit has been improved.The stucture with two PN junctions in series,non-operational amplifier stucture and PTAT (Proportional To Absolute Temperature) current supplied by "self-bias" cascode current mirror,were adopted in the circuit designed.A new method to divide voltage was suggested in this study. The simulation results showed that the dual-output voltages were 2.194V and 1.098V respectively when temperature varied from -10 °C to 100 °C,and the temperature coefficient is only 7.00ppm/°C;The change of Vref only was 5.326mV, and the PSRR was 49.3dB when source voltage varied from 6V to 9V.The Dual-Output Voltage Reference of the circuit designed can meet the requirement of comparator input voltage in high-accuracy pipelined ADC.