电测与仪表2011，Vol.48Issue(1)：64-66,3.
高精度宽范围恒流源设计
Design of a High - precision Wide - range Constant - current Source
吴茂成1
作者信息
- 1. 苏州大学,物理科学与技术学院,江苏,苏州,215006
- 折叠
摘要
Abstract
A wide -range high -precision constant -current source is presented, which is mainly comprised of a voltage reference, some operational amplifiers and a darlington transistor. The range of the circuitry's output current value is from 1 μA to 1A. The working principle of the designed constant - current circuitry is analyzed in details and deduced mathematically, and the selective rules of the practical elements are illuminated. The performance of the designed eonstant - current source is tested, and the results indicate that the circuitry could generate a high - precision steady current. The maximal relative error of precision and maximal error of stability of the output current are 0. 152％ and 0.047％ respectively.关键词
恒流源/高精度/运算放大器/反馈Key words
constant - current source/ high - precision/operational amplifier/ feedback分类
信息技术与安全科学引用本文复制引用
吴茂成..高精度宽范围恒流源设计[J].电测与仪表,2011,48(1):64-66,3.
