Proceedings of the Korean Institute of Information and Commucation Sciences Conference (한국정보통신학회:학술대회논문집)
- 2013.10a
- /
- Pages.726-729
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- 2013
A Low-Power High Slew-Rate Rail to Rail Dual Buffer Amplifier for LCD output Driver
LCD 드라이버에 적용 가능한 저소비전력 및 높은 슬루율을 갖는 이중 레일 투 레일 버퍼 증폭기
- Lee, Min-woo (Cheongju University) ;
- Kang, Byung-jun (Cheongju University) ;
-
Kim, Han-seul
(Cheongju University)
;
- Han, Jung-woo (Cheongju University) ;
-
Son, Sang-hee
(Cheongju University)
;
- Jung, Won-sup (Cheongju University)
- Published : 2013.10.25
Abstract
In this paper, low power and high slew rate CMOS rail to rail input/output opamp applicable for ouput buffer amp, in LCD source driver IC, is proposed. Proposed op-amp, is realized the characteristics of low power consumption and high slew rate adding the newly designed control stage of class-B to the conventional output stage of class-AB. From the simulation results, we know that the proposed opamp buffer can drive a 1000pF capacitive load with a 6.5V/us slew-rate, while drawing only the the power consumption of 1.19mW from 3.3V power supply.
본 논문에서는 LCD source driver IC의 output buffer op-amp로 사용가능한 저소비전력 및 높은 슬루율을 갖는 CMOS rail-to rail 입/출력 op-amp를 설계하였다. 제안한 op-amp는 기존의 출력단 Class-AB 단에 새로이 설계한 Class-B control단을 추가하여 저소비전력과 높은 슬루율을 갖게 하였다. 시뮬레이션 결과 제안된 op-amp는 소비전력이 1.19mW로 감소하였으며 사용한 부하커패시터 (10nF)를 기준으로 슬루율은 6.5V/us로 확인되었다.