本篇論文設計三種輸出緩衝器，第一種緩衝器採用簡單的比較器，感測輸入信號來打開輔助電晶體，達到大的驅動能力，且輔助驅動電晶體在穩態時是關閉的狀態，故不消耗任何功率。第二種緩衝器增加P/N動態調整機制，因此改正第一種輸出緩衝器的缺點，使得此緩衝器具有雙充放電路徑。P/N動態調整機制需額外增加兩組偏壓點，故提出自我偏壓方式，利用驅動系統的特性與相鄰兩組輸出緩衝器內建之偏壓節點，達成自我偏壓的功能而不損耗任何電路功率。第三種緩衝器是利用兩個互補的緩衝器以驅動一對資料線，並具備雙充放電路徑和自我偏壓的方式，因此具有軌對軌輸入範圍、低功率以及高速驅動力等特性。
本篇論文利用第三種輸出緩衝器結合電阻區段式數位類比轉換器之特性，設計完成一組八位元源極驅動器，因此具備高驅動能力、低功率消耗和有效降低晶片面積之特色，並適合於大尺寸液晶顯示電視之應用。

In the thesis, three types of output buffers are proposed. TypeⅠbuffer employs a simple comparator to sense the input transients and turn on an auxiliary P-type charging transistor (normally off in steady state) to enhance the output driving capability without increasing the quiescent power consumption. Type II buffer adopts both auxiliary P-type charging and N-type discharging transistors to achieve dual paths (P/N) of symmetrical driving.A self-bias circuit is also proposed for type II buffer to generate the required bias voltages for the P/N dynamic level shifter. Type III circuit which utilizes two complementary differential buffers is proposed to drive a pair of data lines. It employs dual paths of charging and discharging and a self-bias circuit to realize a rail-to-rail input range, high-speed driving capability and low-power dissipation.
Finally, an 8-bit source driver composed of type III buffer and a resistor-to-resistor digital to analog converter is designed and presented. It has high-speed driving capability, low quiescent power consumption, small chip area, and is optimized for TFT-LCD TV application.

[1] DisplaySearch, http://www.displaysearch.com/
[2] D. Johns and K. Martin, Analog Integrated Circuit Design, John Wiley & Sons, Inc., 1997.
[3] R. Gregorian, Introduction to CMOS OP-AMPs and Comparators, John Wiley & Sons, Inc., 1999, pp. 218-231.
[4] Y. C. Sung, S. M. So, J. K. Kim, and O. K Kwon, “Source Driver with Resistor-Resistor Digital to Analog Converter,” in SID 2005 Digest of Technical Papers, 2005, pp 1099-1101.
[5] E. G. Kim and R. Martin, “A Compact LCD Driver and Timing Controller System,” SID2000 Digest of Technical Papers, 2000 pp. 46-49.
[6] J. H. Kim, B. D. Choi, and O. K. Kwon, “1-Billion-Color TFT-LCD TV with Full HD Format,” IEEE Trans. Consum. Electron. , vol. 51, no. 4, Nov. 2005.
[7] Tetsuro Itakura, “A high slew rate operational amplifier for an LCD driver IC,” IEICE Trans. Fundamentals. Vol. E78-A, no. 2, Feb. 1995.
[8] S.K. Kim, Y.S. Son, and G.H. Cho, “Low-Power high-slew-rate CMOS buffer amplifier for flat panel display drivers,” IEE ELECTRONICS LETTERS 2006.
[9] M. G. Degrauwe, J. Rijmenants, E. A. Vittoz and H. J. Deman, “Adaptive Biasing CMOS Amplifiers,” IEEE JSSC, vol. sc-17, no. 3, Jun. 1982.
[10] Y. S. Son, J. H. Kim, H. H. Cho, J. P. Hong, J. H. Na, D. S. Kim, D. K. Han, J. C. Hong, Y. J. Jeon, and G. H. Cho, ”A Column Driver with Low-Power Area-Efficient Push-Pull Buffer Amplifiers for Active-Matrix LCDs,” ISSCC Dig. Tech. Papers, pp. 142-143, Feb. 2007.
[11] P. C. Yu and J. C. Wu, “A class-B output buffer for flat-panel-display column driver,” IEEE J. Solid-State Circuits, vol.34, pp.116-119, Jan. 1999.
[12] C. W. Lu and K. J Hsu, “A High-Speed Low-Power Rail-to-Rail Column Driver for AMLCD Application,” IEEE JSSC, vol. 39, no. 8, Aug. 2004.
[13] T. Itaku, H. Minamizaki, T. Satio, and T. Kuroda, “A 402-output TFT-LCD driver IC with power control based on the number of colors selected,” IEEE JSSC, vol. 38, no. 3, pp.503-510, Mar. 2003.
[14] O. Ishibashi, M. Iriguchi, K. Ishii, D. Sasaki, H. Imai, H. Tsuchi, and H. Hayama, ”Panel-Sized TFT-LCD Column Driver,” ISSCC 2006
[15] C. C. Enz and G. C. Temes, “Circuit Techniques for Reducing the effects of OP-AMP Imperfection: Autozeroing, Correlated Double Sampling, and Chopper Stabilization,” Proc. Of the IEEE, Vol. 84, pp.1584-1614, Nov 1996
[16] Willem den Bor, Active Matrix Liquid Crystal Displays, Elsevier(Singapore) Pte Ltd.
[17] 電子工程專輯，STN-LCD 彩色螢幕模組設計，2004年04月10日
[18] 戴亞翔，TFT-LCD 面板的驅動與設計，五南書局，2006年
[19] L. K. Bu, “METHOD AND RELATED APPARATUS FOR DRIVING AN LCD MONITOR WITH A CLASS-A OPERATIONAL AMPLIFIER,” U.S. Patent 6853362, Feb. 8, 2005.
[20] Solomon Systech, “Source driver Solution for TFT Large Size Display”
[21] KS0647, 256-Ch. TFT LCD Gate Driver Datasheet, Samsung Electronics, Nov. 1999.
[22] uPD16721, 384-Output (256-Gray Scales) TFT-LCD Source Driver Datasheet, NEC Corporation, Feb. 2002.
[23] C. W. Lu, “High-Speed Driving Scheme and Compact High-Speed Low-Power Rail-and-Rail Class-B Buffer Amplifier for LCD Applications,” IEEE JSSC, vol. 39, no. 11, Aug. 2004.
[24] J. H. Wang, J. C. Qiu, H. Y. Zheng, C. H. Tsai, C. Y. Wang, C. C. Lee, C. T. Chang, “A Compact Low-Power High Slew-Rate Rail-to-Rail Class-AB Buffer Amplifier for LCD Driver ICs ,”IEEE Electron Devices and Solid-State Circuits , 2007.