Design and evaluation of a high-accuracy current sensing circuit

作者：Tian, Lei^*; Li, Qinqin; Wang, Weiheng

来源：IEEJ Transactions on Electrical and Electronic Engineering, 2018, 13(12): 1777-1782.

DOI：10.1002/tee.22740

• current sense
• gain error
• transient response
• input offset voltage

This paper introduces a high-accuracy current sensing circuit consuming low power. The structure includes five current and voltage transformation stages, and uses resistors to reduce the input offset voltage. By allowing a wide common-mode input range, the versatility of the proposed topology is greatly widened. The proposed current sensing circuit is implemented with the 0.35-mu m Bipolar-CMOS-DMOS (BCD) process with the block area down to 3.68 mm(2). The supply current is decreased to 1 mu A while still guaranteeing a fast transient response.

• 出版日期2018-12
• 单位西安邮电大学