Design and evaluation of a high‐accuracy current sensing circuit

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 gre...

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Published in:IEEJ transactions on electrical and electronic engineering 2018-12, Vol.13 (12), p.1777-1782
Main Authors: Tian, Lei, Li, Qinqin, Wang, Weiheng
Format: Article
Language:English
Subjects:
Circuit design
Circuits
CMOS
current sense
Detection
Electric potential
gain error
input offset voltage
Power consumption
Resistors
transient response
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Li, Qinqin
Wang, Weiheng
description 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‐μm Bipolar‐CMOS‐DMOS (BCD) process with the block area down to 3.68 mm2. The supply current is decreased to 1 μA while still guaranteeing a fast transient response. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
doi_str_mv 10.1002/tee.22740
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subjects Circuit design
Circuits
CMOS
current sense
Detection
Electric potential
gain error
input offset voltage
Power consumption
Resistors
transient response
title Design and evaluation of a high‐accuracy current sensing circuit
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