A Fast-Switching Current-Pulse Driver for LED Backlight
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作者:
Kim, Jang-Su
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机构:
Chungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South KoreaChungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South Korea
Kim, Jang-Su
[1
]
Lee, Yong-Kyu
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机构:
Chungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South KoreaChungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South Korea
Lee, Yong-Kyu
[1
]
Lee, Jee-Sue
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机构:
Chungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South KoreaChungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South Korea
Lee, Jee-Sue
[1
]
Shin, Young-Kyu
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Chungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South KoreaChungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South Korea
Shin, Young-Kyu
[1
]
Tark, Jung-Hyun
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Chungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South KoreaChungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South Korea
Tark, Jung-Hyun
[1
]
Ryu, Keun-Chul
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Chungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South KoreaChungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South Korea
Ryu, Keun-Chul
[1
]
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机构:
Yang, Byung-Do
[1
]
机构:
[1] Chungbuk Natl Univ, VLSI Circuit & Syst Lab, Cheongju, Chungbuk, South Korea
来源:
ISCAS: 2009 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-5
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2009年
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D O I:
暂无
中图分类号:
TP [自动化技术、计算机技术];
学科分类号:
0812 ;
摘要:
In this paper, a fast-switching current-pulse driver for light emitting diodes (LED) backlight is proposed. It uses a regulated drain current mirror (RD-CM) [1] and a high-voltage NMOS transistor (HV-NMOS). It achieves the fast-response current-pulse switching by using a dynamic gain-boosting amplifier (DGB-AMP). The DGB-AMP does not discharge the large HV-NMOS gate capacitance of the RD-CM when the output current switch turns off. Therefore, it does not need to charge the HV NMOS gate capacitance when the switch turns on. The proposed current-pulse driver achieves the fast current switching by removing the repetitive gate discharging and charging. Simulation results were verified with measurements performed on a fabricated chip using a 5V/40V 0.5um BCD process. It reduces the switching delay to 360ns from 700ns of the conventional current-pulse driver.
机构:
Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Peoples R ChinaHong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Peoples R China
Shu, Ji
Sun, Jiahui
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机构:
Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Peoples R ChinaHong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Peoples R China
Sun, Jiahui
Wu, Xinke
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机构:
Zhejiang Univ, Coll Elect Engn, Hangzhou 310027, Peoples R ChinaHong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Peoples R China
Wu, Xinke
Chen, Kevin J.
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机构:
Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Peoples R ChinaHong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Peoples R China