A class-B output buffer for flat-panel-display column driver
| Autor: | Jiin-Chuan Wu, Pang-Cheng Yu |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Physics
Liquid-crystal display Comparator Settling time business.industry Electrical engineering Buffer amplifier Differential amplifier Hardware_PERFORMANCEANDRELIABILITY Capacitance Flat panel display law.invention law Control theory Hardware_INTEGRATEDCIRCUITS Electrical and Electronic Engineering business Voltage |
| Zdroj: | IEEE Journal of Solid-State Circuits. 34:116-119 |
| ISSN: | 0018-9200 |
| DOI: | 10.1109/4.736665 |
| Popis: | Due to the large number of output buffers on a column driver chip of a flat-panel display, the quiescent current and die area of the output buffer must be minimized. This paper presents a low static power, large output swing, and wide operating voltage range class-B output buffer amplifier for driving the large column line capacitance in a flat-panel display. A comparator is used in the negative feedback path to eliminate quiescent current in the output stage. The proposed output buffer circuit was implemented in a 0.8 /spl mu/m CMOS process. Its output voltage swing is from 1 V to the supply voltage. With 5 V supply and 600 pF load, the maximum tracking error is /spl plusmn/7 mV. The measured static current is 24 /spl mu/A. The settling time for 4 V swing to within 0.2% is 8 /spl mu/s, which is more than adequate for driving 1280/spl times/1024 pixels liquid crystal displays with 86 Hz frame rate and 256 gray levels in each color. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|