Paper Info
Title
Cmos Cascode Source-Drain Follower For Monolithically Integrated Biosensor Array
Abstract
Source-drain follower has been designed and implemented for monolithically integrated biosensor array. The circuit acts as a voltage follower, in which a sensing transistor is operated at fixed gate-source and gate-drain voltages. It operates at 10nW power dissipation. The wide-swing cascode configurations are investigated in constant and non-constant biasing methods. The constant biased cascode source-drain follower has the merit of small cell size. The chip was fabricated using 1.2 mu m standard CMOS technology, and a wide range of operation between 1nW and 100 mu W was demonstrated. The accuracy of the voltage follower was 30 mV using minimum sized transistors, due to the variation of threshold voltage. The error in the output except for the threshold voltage mismatch was less than 10 mV. The temperature dependence of the output was 0.11 mV/degrees C. To improve the input voltage range and accuracy, non-constant biased cascode source-drain follower is examined. The sensor cell is designed for 10mV accuracy and the cell size is 105.3 mu m x 81.4 mu m in 1.2 mu m CMOS design rules. The sensor cell was fabricated and showed that the error in the Output except for the threshold voltage mismatch was less than 2 mV in a range of total current between 3nA and 10 mu A and in a temperature range between 30 degrees C and 100 degrees C.
Year
DOI
Venue
2008
10.1093/ietele/e91-c.9.1505
IEICE TRANSACTIONS ON ELECTRONICS
Keywords
Field
DocType
CMOS biosensor, sensor array, ISFET, source-drain follower, voltage follower
Current mirror,Cascode,Buffer amplifier,Electronic engineering,CMOS,Engineering,Transistor,Threshold voltage,Electrical engineering,Integrated circuit,Biasing
Journal
Volume
Issue
ISSN
E91C
9
0916-8524
Citations 
PageRank 
References 
4
1.33
1
Authors
3
Name
Order
Citations
PageRank
Kazuo Nakazato13715.05
Mitsuo Ohura241.33
Shigeyasu Uno342.34