Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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Bandgap Voltage Reference Circuit Design Technology Suitable for Driving Large OLED Display Panel

대형 OLED 디스플레이 패널 구동에 적합한 밴드갭 레퍼런스 회로 설계 및 결과

  • Moon, Jong Il (Department of Electronics Engineering, Gachon University) ;
  • Cho, Sang Jun (Department of Electronics Engineering, Gachon University) ;
  • Cho, Eou Sik (Department of Electronics Engineering, Gachon University) ;
  • Nam, Chul (Silicon Harmony Co., Ltd) ;
  • Kwon, Sang Jik (Department of Electronics Engineering, Gachon University)
  • 문종일 (가천대학교 전자공학과) ;
  • 조상준 (가천대학교 전자공학과) ;
  • 조의식 (가천대학교 전자공학과) ;
  • 남철 ((주)실리콘하모니) ;
  • 권상직 (가천대학교 전자공학과)
  • Received : 2018.06.12
  • Accepted : 2018.06.21
  • Published : 2018.06.30
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Abstract

In this paper, a CMOS bandgap voltage reference that is not sensitive to changes in the external environment is presented. Large OLED display panels need high supply voltage. MOSFET devices with high voltage are sensitive to the output voltage due to the channel length modulation effect. The self-cascode circuit was applied to the bandgap reference circuit. Simulation results show that the maximum output voltage change of the basic circuit is 77mV when the supply voltage is changed from 10.5V to 13.5V, but the proposed circuit change is improved to 0.0422mV. The improved circuit has a low temperature coefficient of $9.1ppm/^{\circ}C$ when changing the temperature from $-40^{\circ}C$ to $140^{\circ}C$. Therefore, the proposed circuit can be used as a reference voltage source for circuits that require a high supply voltage.

Keywords

References

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