For Full-Text PDF, please login, if you are a member of IEICE,|
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
CMOS Image Sensor Using Negative-Feedback Resetting to Obtain Variably Smoothed Images
Masayuki IKEBE Keita SAITO
IEICE TRANSACTIONS on Electronics
Publication Date: 2006/11/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Novel Device Architectures and System Integration Technologies)
CMOS-image sensor, negative feedback reset, filtersize,
Full Text: PDF(1.2MB)>>
We designed a CMOS image sensor capable of capturing variably smoothed images. This sensor uses a negative-feedback technique to set photodiode (PD) capacitance in the pixel circuit to any intermediate voltage during charge accumulation and it provides a neighboring-pixel operation by using their average value when resetting the PD capacitance. Smoothing-filter coefficients are changed by adjusting timing of the pixel-readout and neighboring-pixels operations. The performance of the proposed sensor was evaluated by SPICE simulation and numerical analysis.