DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Cho, Gyu-Hyeong | - |
dc.contributor.advisor | 조규형 | - |
dc.contributor.author | Kim, Hyun-Sik | - |
dc.contributor.author | 김현식 | - |
dc.date.accessioned | 2015-04-23T06:12:44Z | - |
dc.date.available | 2015-04-23T06:12:44Z | - |
dc.date.issued | 2014 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=568599&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/196563 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 전기및전자공학과, 2014.2, [ iv, 83 p. ] | - |
dc.description.abstract | Mixed-signal processing-the integration of digital and analog circuitry within computer system-enables systems to take signals from the analog world and process them within a digital system. In fact, recent advances in VLSI technology performance now allow for the integration of digital and analog circuits on a single chip and for the process that requires the use of analog pre- and post-processing system such as data converters, filters, sensors, drivers, buffers, and actuators. This thesis investigates mixed-signal CMOS inte-grated circuit designs for medical X-ray image sensor and liquid crystal display (LCD) column driver chip. In Chapter 1, a direct photon-counting X-ray image detector with a HgI2 photoconductor is presented for high-quality medical imaging applications. The proposed sampling-based charge preamplifier with asyn-chronous self-reset enables a pixel to detect single X-ray photon energy with higher sensitivity and faster pro-cessing rate. The use of the correlated double sampling enabled by the sampling-based architecture also re-duces flicker noise and contributes to the achievement of high pixel-to-pixel uniformity. Discrimination of the energy level of the detected X-rays is performed by the proposed compact in-pixel ADC with low power con-sumption. Three 15-bit counters in each pixel count up energy-discriminated photons for the reconstruction of multispectral X-ray images. A 128 × 128 X-ray image detector with a pixel size of 60 × 60 μm2 is implemented and measured using a 0.13-μm/0.35-μm standard CMOS process. It discriminates 3 energy levels of photon energy with a gain of 107 mV/ke- and a static power consumption of 4.6 μW/pixel. The measured equivalent noise charge (ENC) and minimum detectable energy level of the detector pixel are 68 e- rms and 290 e , respectively. The measured maximum threshold dispersion in the pixel array is 164 e- rms without any calibration. The functionality of our chip is also successfully demonstrated usin... | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | CMOS | - |
dc.subject | 구동회로 | - |
dc.subject | 센서 | - |
dc.subject | 혼성신호 | - |
dc.subject | 집적회로 | - |
dc.subject | 상보형금속산화반도체 | - |
dc.subject | Integrated Circuits | - |
dc.subject | Mixed-Signal | - |
dc.subject | Sensor | - |
dc.subject | Driver | - |
dc.title | Design of mixed-signal CMOS integrated circuits for X-ray image sensor and LCD column driver | - |
dc.title.alternative | X-ray 이미지 센서와 LCD 컬럼 구동 칩을 위한 고성능 혼성신호 CMOS 집적회로 설계 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 568599/325007 | - |
dc.description.department | 한국과학기술원 : 전기및전자공학과, | - |
dc.identifier.uid | 020115080 | - |
dc.contributor.localauthor | Cho, Gyu-Hyeong | - |
dc.contributor.localauthor | 조규형 | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.