Design and Implementation of Analog Integrated Circuits in Amorphous-Silicon (a-Si) TFT Technologies
Date Issued
2009
Date
2009
Author(s)
Tarn, Yi-Chuan
Abstract
Conventionally, the amorphous-silicon (a-Si) thin-film-transistor (TFT) technology is primarily employed to realize the display panel excluding the driving circuits of LCDs. Recently, the concept of the system on glass (SOG) is introduced, and some analog circuits are integrated on the glass substrate. In this thesis, to demonstration the potential of the a-Si process for analog integrated circuits (ICs), novel design strategies are proposed to alleviate the intrinsic limitations imposed on this semiconductor. In Chapter 3, a novel operational amplifier (OPAMP) with a gain- enhancement technique is presented while the low-frequency gain can be effectively boosted, facilitating the realization of advanced analog circuits with a-Si TFTs. In Chapter 4, based on the OPAMP provided in Chapter 3, a prototype of the resistor-string digital-to-analog converter (DAC) is implemented in the a-Si technology while this DAC can be further applied in the source driver of the TFT-LCD. In Chapter 5, in cooperation of the fully differential amplifier in Chapter 3, a fully integrated touch panel on the glass substrate is developed, making the system inexpensive in cost and compact in layout area.
Subjects
amorphous silicon
TFT
operational amplifier
digital-to-analog converter
touch panel
Type
thesis
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