Charge Pump Design for TFT-LCD Driver IC Using Stack-MIM Capacitor

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概要

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• A cross-coupled charge pump with internal pumping capacitor, which is advantageous from a point of minimizing TFT-LCD driver IC module, is newly proposed in this paper. By using NMOS and PMOS diodes connected to boosting nodes from VIN nodes, the pumping node is precharged to the same value at the pumping node in starting pumping. Since the first-stage charge pump is designed differently from the other stage pumps, a back current of pumped charge from charge pumping node to input stage is prevented. As a pumping clock driver is located in front of pumping capacitor, the driving capacity is improved by reducing a voltage drop of the pumping clock line from parasitic resistor. Finally, a layout area is decreased more compared with the conventional cross-coupled charge pump by using a stack-MIM capacitor. A proposed charge pump for TFT-LCD driver IC is designed with 0.13μm triple-well DDI process, fabricated, and tested.

著者

• LIM Gyu-Ho

  SoC Design Lab., Department of Electronic Engineering, Changwon National University

• SONG Sung-Young

  SoC Design Lab., Department of Electronic Engineering, Changwon National University

• PARK Jeong-Hun

  SoC Design Lab., Department of Electronic Engineering, Changwon National University

• LI Long-Zhen

  SoC Design Lab., Department of Electronic Engineering, Changwon National University

• LEE Cheon-Hyo

  SoC Design Lab., Department of Electronic Engineering, Changwon National University

• LEE Tae-Yeong

  SoC Design Lab., Department of Electronic Engineering, Changwon National University

• CHO Gyu-Sam

  SoC Design Lab., Department of Electronic Engineering, Changwon National University

• PARK Mu-Hun

  SoC Design Lab., Department of Electronic Engineering, Changwon National University

• HA Pan-Bong

  SoC Design Lab., Department of Electronic Engineering, Changwon National University

• KIM Young-Hee

  SoC Design Lab., Department of Electronic Engineering, Changwon National University

関連論文

• Charge Pump Design for TFT-LCD Driver IC Using Stack-MIM Capacitor
• Charge Pump Design for TFT-LCD Driver IC Using Stack-MIM Capacitor

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