https://scholars.lib.ntu.edu.tw/handle/123456789/174649
標題: | 使用非晶矽薄膜電晶體技術之運算放大器研製及其應用 Development of OPAMP and its Applications in Amorphous-Silicon (a-Si) TFT Technologies |
作者: | 吳建翰 Wu, Chien-Han |
關鍵字: | 非晶矽;薄膜電晶體;運算放大器;差動差分放大器;濾波器;觸碰式面板;amorphous silicon;TFT;OPAMP;DDA;filter;touch panel | 公開日期: | 2009 | 摘要: | 隨著製程的進步,以非晶矽薄膜電晶體主動陣列所製成的液晶顯示器由於降低了生產成本與提高了生產良率而越來越受到歡迎。為了能提供液晶顯示器驅動信號與控制訊號,整個面板系統仍然需要由互補式金氧半導體製程所製造的週邊電路。近年來,由於SOG的觀念日漸受到重視,若將顯示器所需之週邊電路用與面板元件相同的製成一同整合在同樣的玻璃基版上,高整合度的系統將可以被實現,而且也可以降低生產成本與提高可靠度。然而,也由於薄膜電晶體元件能力的不足,以非晶矽薄膜電晶體元件來設計積體電路仍然存在著一定的困難度,尤其是設計類比電路,甚至是設計混和訊號積體電路。本篇論文,為了克服薄膜電晶體元件所帶來的先天限制,提出了一個創新的架構。在第三章中,藉由增益放大的技巧,可以讓運算放大器的小訊號增益獲得及大的改善,進而促使運算放大器能夠在非晶矽薄膜電晶體製程中實現與研製。在第四章中,根據第三章所提出的運算放大器,差動差分放大器的架構將被提出,並且利用差動差分放大器來設計所需的濾波器。在第五章中,由傳統架構所改良的積體式觸碰面板系統將被提出並實現。 With the advances in the fabrication technology, the liquid-crystal display (LCD) with amorphous-silicon (a-Si) active-matrix thin-film transistors (TFTs) is the most popular one due to its unparallel advantages in fabrication cost and productivity. In order to provide the control and driving signals for the display, a CMOS chipset is generally required. Recently, the concept of a system on glass (SOG) has been proposed. As the peripheral circuits are integrated with the pixel array on the same glass substrate, a compact system with low cost and high reliability can be realized. However, limited by the characteristics of the TFT devices, it is still a challenging task for designers to implement the integrated circuits in an a-Si TFT technology, especially for analog and mixed-signal building blocks. In this thesis, to alleviate the device limitations imposed on a-Si technologies, novel circuit topologies are developed. In Chapter 3, a gain-enhancement technique is introduced to the operational amplifier (OPAMP) while the small-signal gain can be boosted, facilitating circuit implementation in a-Si technologies. In Chapter 4, a differential-difference amplifier (DDA) and a low-pass filter (LPF) based on the proposed OPAMP are developed. In Chapter 5, a touch panel system modified by the conventional charge amplifier is presented for demonstration. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/189172 |
顯示於: | 電子工程學研究所 |
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ntu-98-R95943086-1.pdf | 23.32 kB | Adobe PDF | 檢視/開啟 |
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