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提出了一种采用分段线性补偿的方法来实现高精度带隙基准 ,其基本原理是将整个温度区间分为若干个子区间 ,在不同子区间上采用不同线性补偿函数达到最佳补偿 .由于温度区间缩小 ,补偿误差也随之减小 ,从而在整个工作温度区间上的补偿误差也缩小 .理论上 ,只要温度子区间取得足够小 ,就可以达到任意精度 .示例中将 - 4 0～ 1 2 0℃的温度区间仅分为三个子区间 ,平均温度系数就从 1 .5× 1 0 - 5/℃减小到 2× 1 0 - 6 /℃ .
A method based on piecewise linear compensation is proposed to realize high precision bandgap reference. The basic principle is to divide the whole temperature range into several subintervals and use different linear compensation functions to achieve the best compensation in different subintervals.Because temperature As the interval shrinks and the compensation error decreases, the compensation error in the entire working temperature range also decreases. Theoretically, any precision can be achieved as long as the temperature sub-interval is made small enough. The temperature range of 0 ℃ is only divided into three sub - intervals, and the average temperature coefficient decreases from 1.5 × 10 -5 / ℃ to 2 × 10 -6 / ℃.