| 一种基于高压工艺的高精度电流采样电路 |
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| 引用本文： | 易长根,明鑫,周泽坤,张波. 一种基于高压工艺的高精度电流采样电路[J]. 微电子学, 2010, 40(2) |
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| 作者姓名： | 易长根 明鑫 周泽坤 张波 |
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| 作者单位： | 电子科技大学,电子薄膜与集成器件国家重点实验室,成都,610054 |
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| 摘 要： | 提出了一种用于大功率LED驱动芯片中的电流采样电路。采用电阻采样技术,运用高压、高增益、大带宽的运放,使采样电路具有高精度和快的响应速度。基于0.8μm 40 V BCD工艺,对提出的电流采样电路进行仿真验证。结果表明,在大功率应用下,该采样电路的采样精度高达99.68%,有很好的实用价值。
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| 关 键 词： | 电流采样 补偿网络 高压运放 高压工艺 |
A High Precision Current Sensing Circuit Based on High Voltage Process |
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| YI Changgen,MING Xin,ZHOU Zekun,ZHANG Bo. A High Precision Current Sensing Circuit Based on High Voltage Process[J]. Microelectronics, 2010, 40(2) |
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| Authors: | YI Changgen MING Xin ZHOU Zekun ZHANG Bo |
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| Affiliation: | State Key Lab of Electronic Thin Films and Integrated Device/a>;Univ.of Elec.Sci.&.Technol.of China/a>;Chengdu 610054/a>;P.R.China |
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| Abstract: | A current sensing circuit for high power LED driver was proposed, in which resistance sensing technique was used in combination with high-voltage, high-gain and wide-band operational amplifier to achieve high accuracy and fast response. The circuit was simulated based on 0.8 μm 40 V BCD process. Simulation results showed that the current sensing circuit had an accuracy of 99.68% for high power applications. |
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| Keywords: | Current Sensing Compensation network High voltage operational amplifier High voltage process |
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