电子器件Issue(3)：403-407,5.DOI:10.3969/j.issn.1005-9490.2014.03.006
用于高速DDS中电流舵DAC的基准电流源设计
Design of a Reference Current Source for Current-Steering DAC in DDS Circuit
胡杏 1周启才 2陶建中1
作者信息
- 1. 江南大学物联网工程学院，江苏 无锡214122
- 2. 中国电子科技集团公司第五十八研究所，江苏 无锡214035
- 折叠
摘要
Abstract
A reference current source circuit for the current-steering DAC in the high speed DDS( Digital Direct Fre-quency Synthesis)was introduced,as foundation of the traditional reference current source circuit,the base of the two triodes were connected which produced the△VBE ,and then two amplifiers,were added to make the collector and the base clamp at the same potential. So the transistors in the condition of the saturation region to delete the error Vos that caused by the offset of the amplifiers. The VOS was eliminated in the reference current source circuit. In addition,a circuit for compensating the nonlinear term that is in the expression of VBE to T is proposed. Fabricated by 0. 18 μm N-wells 1P5M process,the NPN type triodes were used. Results showed that in the condition of tt,the tem-perature coefficient of reference output voltage was 10í10-9/℃, the temperature coefficient of reference output current was 10í10-9/℃.关键词
模拟电路设计/基准电流源/带隙基准/DDS/电流舵DACKey words
analog circuit design/reference current source/bandgap reference/DDS/current-steering DAC分类
信息技术与安全科学引用本文复制引用
胡杏,周启才,陶建中..用于高速DDS中电流舵DAC的基准电流源设计[J].电子器件,2014,(3):403-407,5.
