HKUST Library Institutional Repository Banner

HKUST Institutional Repository >
Electronic and Computer Engineering  >
ECE Conference Papers >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/6110
Title: A wide dynamic range high linearity in-pixel data acquisition front-end for computed tomography
Authors: Liu, Bing
Yuan, Jie
Keywords: Analogue-digital conversion
CMOS pixel
HSPICE simulations
Computed tomography detectors
Issue Date: 2009
Citation: Proceedings IEEE International Symposium on Circuits and Systems, ISCAS 2009, 24-27 May 2009, Taipei, Taiwan, p. 2301-2304
Abstract: Computed tomography (CT) detectors require wide dynamic range (DR) and high linearity. This paper reports the design of a new CMOS pixel with in-pixel acquisition front-end for CT in a 0.35μm CMOS process. The detector uses a synchronous partial quantization scheme to linearly expand the dynamic range with a constant potential well size. A low-power analog-to-digital converter is also designed in the pixel. HSPICE simulations verify that the designed detector is able to achieve 96dB DR, with -104dB total-harmonic-distortion (THD) over the dynamic range. No calibration procedure is required for the high linearity. The input-referred noise is less than 1mVrms. The frame rate of the designed detector is 2.4k Hz.
Rights: © 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
URI: http://hdl.handle.net/1783.1/6110
Appears in Collections:ECE Conference Papers

Files in This Item:

File Description SizeFormat
wide.pdf817KbAdobe PDFView/Open

All items in this Repository are protected by copyright, with all rights reserved.