By Topic

A 0.6V CMOS Image Sensor with in-pixel biphasic current driver for biomedical application

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Chin-Lin Lee ; Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan ; Chih-Cheng Hsieh

A 0.6V pulse frequency modulation (PFM) CMOS Image Sensor (CIS) array with in-pixel biphasic current pulse driver is presented in this paper. It achieves a photon-to-biphasic current conversion for biomedical applications like artificial 2-D vision recovery. The photon-to-biphasic-current conversion gain, the biphasic pulse width, polarity, and output rate are all tunable depends on applications and environments. A 32×32 pixel array with 30×30 um2 pixel size has been designed and fabricated in 0.18um CMOS technology providing the fill factor of 24.5%. Measurement results show a 0.63Hz/lux conversion gain of PFM sensor within 25hz~5kHz output with power consumption as 2uW~55uW depends on illumination. The maximum driving capability of biphasic neural stimulation current pulse is ±20μA with a 10kΩ electrode model.

Published in:

Circuits and Systems (ISCAS), 2011 IEEE International Symposium on

Date of Conference:

15-18 May 2011