DocumentCode
1522514
Title
Reduction of Interference Between pH and Optical Output Signals in a Multimodal Bio-Image Sensor
Author
Nakazawa, Hirokazu ; Ishida, Makoto ; Sawada, Kazuaki
Author_Institution
Integrated Circuit & Sensor Syst. Group, Toyohashi Univ. of Technol., Toyohashi, Japan
Volume
11
Issue
11
fYear
2011
Firstpage
2718
Lastpage
2722
Abstract
A low-interference multimodal sensor for pH and optical imaging has been developed. The interference signal that occurs between pH and the optical outputs is found to be caused by photogenerated electrons during pH sensing. This interference could be suppressed by adding another charge-accumulation region to a conventional multimodal sensor structure in order to measure only photogenerated electrons. Conventional pH sensing devices combine accumulation regions for photo generated electrons, thereby discriminating between pH and optical signals.
Keywords
biosensors; chemical sensors; image sensors; interference (signal); pH measurement; interference reduction; multimodal bioimage sensor; optical output signals; pH sensing; photogenerated electrons; Electric potential; Image sensors; Interference; Optical buffering; Optical imaging; Optical sensors; CMOS integrated circuits; Charge transfer image sensors; visual system;
fLanguage
English
Journal_Title
Sensors Journal, IEEE
Publisher
ieee
ISSN
1530-437X
Type
jour
DOI
10.1109/JSEN.2011.2157340
Filename
5771971
Link To Document