發(fā)布時(shí)間：2019-01-28 23:09

【摘要】：隨著微電子技術(shù)和計(jì)算機(jī)技術(shù)的迅速發(fā)展,觸摸屏技術(shù)逐漸代替了傳統(tǒng)的機(jī)械裝置，成為眾多電子產(chǎn)品的控制裝置。觸摸屏本身比較輕便，能夠有效的節(jié)約空間，操作簡(jiǎn)單，因此具有傳統(tǒng)鍵盤不可替代的優(yōu)點(diǎn)。同時(shí)觸摸屏技術(shù)能夠讓人直接的對(duì)屏幕進(jìn)行操作控制，，提供了一種絕對(duì)的操作模式，極大的方便了用戶。配上觸摸屏幕多彩的視覺(jué)效果，給人十分舒適的操作享受。在眾多觸摸屏產(chǎn)品中，電阻式觸摸屏由于價(jià)格低、清晰度高、堅(jiān)固耐用等特點(diǎn),在市場(chǎng)上的占有率居高不下。 本文基于四線電阻式觸摸屏，設(shè)計(jì)了一款觸摸屏驅(qū)動(dòng)芯片。整個(gè)芯片包括ADC模塊、片內(nèi)溫度測(cè)量模塊、電池監(jiān)控模塊、六路通道選擇器、數(shù)字控制模塊和內(nèi)部電壓基準(zhǔn)模塊，芯片的核心是一個(gè)12位的數(shù)模轉(zhuǎn)換器（ADC）。在保證版圖面積小的前提下，設(shè)計(jì)出低功耗、高精度的ADC是本文設(shè)計(jì)的主要工作。在不同種類的ADC中，逐次逼近式ADC轉(zhuǎn)換速度快、精度高、功耗較低，因此本文采用了12位逐次逼近式ADC作為芯片的核心。本文設(shè)計(jì)的逐次逼近式ADC基于電荷按比例縮放式數(shù)模轉(zhuǎn)換器（DAC），并采用了開(kāi)關(guān)電容比較器，通過(guò)精確的時(shí)鐘控制，大大地降低了ADC功耗。在內(nèi)部基準(zhǔn)模塊中，設(shè)計(jì)了帶隙基準(zhǔn)作為內(nèi)部電壓基準(zhǔn)源。同時(shí)本文設(shè)計(jì)的芯片也可以在內(nèi)部基準(zhǔn)和外部基準(zhǔn)之間進(jìn)行切換以達(dá)到降低功耗的作用。通過(guò)合理設(shè)計(jì)，使得整個(gè)芯片的分辨率高，又保持了較低的功耗。 本文的芯片設(shè)計(jì)采用了世界領(lǐng)先的臺(tái)積電(TSMC)65nm的工藝，在設(shè)計(jì)過(guò)程中首先在Cadence環(huán)境下完成了電路的圖像化描述，然后運(yùn)用Synopsys公司下的Hspice軟件進(jìn)行了電路的仿真，最后運(yùn)用Cadence環(huán)境下的virtuoso進(jìn)行了版圖的設(shè)計(jì)，并運(yùn)用了Mentor公司的Calibre軟件對(duì)版圖進(jìn)行驗(yàn)證工作。在整個(gè)設(shè)計(jì)過(guò)程中，充分發(fā)揮每種集成電路設(shè)計(jì)軟件的優(yōu)點(diǎn)，極大的提高了設(shè)計(jì)工作的效率，也盡量減小了在設(shè)計(jì)工作中可能存在的設(shè)計(jì)偏差。 在芯片的仿真工作中，各個(gè)模塊的性能十分理想。整個(gè)芯片具有精度高、功耗低、版圖面積小的特點(diǎn)。芯片已經(jīng)流片，未來(lái)將會(huì)出現(xiàn)在觸摸屏移動(dòng)終端中。
[Abstract]:With the rapid development of microelectronics and computer technology, touch screen technology has gradually replaced the traditional mechanical devices and become the control device of many electronic products. Touch screen itself is portable, can effectively save space, simple operation, so it has the advantages of traditional keyboard irreplaceable. At the same time, touch screen technology can directly control the screen, providing an absolute mode of operation, which greatly facilitates the user. With touch screen colorful visual effects, give people very comfortable to enjoy the operation. Among many touch screen products, resistive touch screen has a high market share due to its low price, high definition and durability. Based on four-wire resistive touch screen, a touch screen driver chip is designed in this paper. The whole chip includes ADC module, in-chip temperature measurement module, battery monitoring module, six-channel selector, digital control module and internal voltage reference module. The core of the chip is a 12-bit digital-to-analog converter (ADC). On the premise of small layout area, the design of low power and high precision ADC is the main work of this paper. In different kinds of ADC, the successive approximation ADC conversion speed is fast, the precision is high, and the power consumption is low. Therefore, the 12-bit successive approximation ADC is used as the core of the chip in this paper. The successive approximation ADC designed in this paper is based on the charge scaling (DAC), and uses the switched capacitor comparator. The power consumption of the ADC is greatly reduced by precise clock control. In the internal reference module, the bandgap reference is designed as the internal voltage reference source. At the same time, the chip designed in this paper can also switch between internal reference and external reference to reduce power consumption. Through reasonable design, the resolution of the whole chip is high and the power consumption is low. In this paper, the chip design adopts the world leading TSMC (TSMC) 65nm technology. In the design process, the circuit is described graphically under the Cadence environment, and then the circuit is simulated by the Hspice software of Synopsys Company. Finally, the layout is designed by using virtuoso in Cadence environment, and the layout is verified by Calibre software of Mentor Company. In the whole design process, the advantages of each integrated circuit design software are brought into full play, the efficiency of the design work is greatly improved, and the possible design deviation in the design work is reduced as far as possible. In the simulation of the chip, the performance of each module is very ideal. The whole chip has the characteristics of high precision, low power consumption and small layout area. The chip has been streaming and will appear in touch-screen mobile terminals in the future.
【學(xué)位授予單位】：遼寧大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TP334.3;TN47

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉新斌;紅外觸摸屏技術(shù)[J];多媒體世界;1995年09期

2 陳善海;高速低噪聲運(yùn)算放大器[J];電子技術(shù);1994年04期

3 李彪;雷天民;;一種低溫漂BiCMOS帶隙基準(zhǔn)電壓源的設(shè)計(jì)[J];電子器件;2007年01期

4 何捷,朱臻,王濤,李夢(mèng)雄,洪志良;一種具有溫度補(bǔ)償、高電源抑制比的帶隙基準(zhǔn)源[J];復(fù)旦學(xué)報(bào)(自然科學(xué)版);2001年01期

5 魏智;解析逐次逼近ADC[J];國(guó)外電子元器件;2003年02期

6 王娜;王繼安;尚曉丹;張佳;李威;龔敏;;電荷再分配DAC級(jí)間耦合電容值的優(yōu)化設(shè)計(jì)[J];微電子學(xué);2006年04期

7 張媛媛;姜巖峰;;Σ-Δ模擬/數(shù)字轉(zhuǎn)換器綜述[J];微電子學(xué);2006年04期

8 歐俊雯,李蔚,程君俠,章倩苓;一種流水線結(jié)構(gòu)A/D轉(zhuǎn)換器的設(shè)計(jì)[J];微電子學(xué);1998年03期

9 約翰·布什;;觸摸屏之熱潮[J];中國(guó)集成電路;2011年12期

10 郭樹(shù)田;A/D和D/A轉(zhuǎn)換器發(fā)展動(dòng)態(tài)[J];世界產(chǎn)品與技術(shù);2000年06期

相關(guān)碩士學(xué)位論文 前1條

1 張飛;基于WinCE的大型觸摸屏控制器的設(shè)計(jì)與實(shí)現(xiàn)[D];江南大學(xué);2008年

本文編號(hào)：2417401