关键词：负反馈；偏差；旁路电容；工作点
摘 要：In this paper,a novel BiCMOS current steering bandgap is presented,which includes reference core,start-up circuit,and output circuit,of which the reference core is used to produce the temperature-stable current,the start-up to start up the reference core when powered on,and the output circuit to proportionally transport the reference current to other cells on the same chip.Compared to the traditional voltage-mode bandgap reference,because of the adoption of the current-steering mode,the reference proposed in this paper,has the merits of being immune to variation of the power supply,minimum transport consumption,better matches,temperature stability,smaller area,auto-startup,and so on,which are specially needed in AD/DA application.The simulation shows that the proposed current-mode reference circuit has full temperature range coefficient of 8.9ppm,which is better than that of the traditional voltage-and current-mode reference circuits.