Analysis of Lossless Current Sensing Techniques with High Accuracy and Linearity

摘要：

Several lossless current sensing techniques have been proposed in literatures and adopted by the industries in recentyears. However, none of these solutions have addressed the issue of uniform sense accuracy. In this paper, an in-depth analysis of the lossless current sensing technique implemented in a dc-dc buck converter is presented. The compensation techniques for achieving a uniform sense-ratio are discussed and analyzed using two different current sense circuit topologies. The sense circuits are designed using the AMS 0.35um, 4 metals, double poly CMOS process. Using the same technology and operating under the same electrical conditions, the simulation results show that the proposed sense circuits achieved a maximum sense accuracy of 99％, compared to 95％ achieved using the conventional approach.

作者: Linda Ng Subkhan Prawira Subkhan Prawira, Y.Y.H.Lam H.S.Fong

作者单位: School of Electrical and Electronic Engineering Nanyang Technological University Singapore New Market Development, Strategic Planning (AP), STMicroelectronics Asia Pacific Pte Ltd, Singapore

会议类型: 国际会议

会议名称: 2007年通信、电路与系统国际会议(2007 International Conference on Communications,Circuits and Systems Proceedings)

会议地点: 日本福冈

会议语种:英文

在线出版日期: 2007-07-11（万方平台首次上网日期，不代表论文的发表时间）