Integrated High-accuracy On-chip Current Sensing Circuit for Current-mode Control CMOS DC-DC Buck Converter

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Integrated High-accuracy On-chip Current Sensing Circuit for Current-mode Control CMOS DC-DC Buck Converter

更新时间：2026-09-04

- Integrated High-accuracy On-chip Current Sensing Circuit for Current-mode Control CMOS DC-DC Buck Converter
- Vol. 28, Issue 6, Pages: 46-50(2011)
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- Published：2011
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一种适用于Buck型DC/DC变换器的高精度片上电流采样电路[J]. 微电子学与计算机, 2011, 28(6): 46-50.

Integrated High-accuracy On-chip Current Sensing Circuit for Current-mode Control CMOS DC-DC Buck Converter[J]. 2011, 28(6): 46-50.
一种适用于Buck型DC/DC变换器的高精度片上电流采样电路[J]. 微电子学与计算机, 2011, 28(6): 46-50. DOI：

Integrated High-accuracy On-chip Current Sensing Circuit for Current-mode Control CMOS DC-DC Buck Converter[J]. 2011, 28(6): 46-50. DOI：

摘要

电流采样电路作为电流控制的DC/DC变换器重要组成部件之一

其精度和响应速度已受到越来越高的重视.提出的电流采样电路没有使用运算放大器

简化了电路结构

降低了功耗.同时

电路中引入的补偿电流进一步提高了采样的精度.基于0.5μm CMOS工艺实现该电路

HSPICE模拟仿真结果表明该电路具有较高的采样精度

最高可达99.9%

且在负载、输入电压、温度变化时

采样精度波动很小.

Abstract

Current sensing circuit is one of the most important component parts of current-control DC/DC convertor

its accuracy and response speed acquires more and more attention.We proposed a novel current sensing circuit in this paper

which does not use the operational amplifier

simplify the circuit structure

reducing power consumption

at the same time

the introduction of the compensation current further improves the sensing accuracy.Designed the circuit based on 0.5 μm CMOS process

HSPICE simulation results show that the circuit has a high sensing accuracy up to 99.9%

and as workload

input voltage and temperature changes

the fluctuation of sensing accuracy of the circuit is very small.

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