Development of OPAMP and its Applications in Amorphous-Silicon (a-Si) TFT Technologies
Date Issued
2009
Date
2009
Author(s)
Wu, Chien-Han
Abstract
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.
Subjects
amorphous silicon
TFT
OPAMP
DDA
filter
touch panel
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-98-R95943086-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):c70600e52973e81e67bc0105f8a69948