An offset reduction infrared tracking system with winner-take-all implementation for CMOS thermal microsensor
- Resource Type
- Conference
- Authors
- Wang, Jun-Qi; Shen, Chih-Hsiung
- Source
- 2009 IEEE Sensors Sensors, 2009 IEEE. :1701-1704 Oct, 2009
- Subject
- Photonics and Electrooptics
Microsensors
Circuits
Sensor arrays
Infrared sensors
Thermal sensors
CMOS technology
Silicon
Sampling methods
Temperature sensors
Detectors
thermal sensor array
thermopile
CMOS winner-take-all (WTA)
infrared tracking
- Language
- ISSN
- 1930-0395
A new modified infrared tracking sensor array is proposed, which identifies the locations and sizes of thermal object efficiently with the winner-take-all (WTA) circuit and a low offset correlated double sampling (CDS) circuit. The winner-take-all (WTA) circuit is used in combination with active readout circuit for thermopile array. The offset reduction with CDS technique enhances the sensitivity of winner-take-all (WTA) circuit and shows a sharp selectivity which makes it possible to pick up only one winner pixel from each thermal object. In order to simulate and present the infrared thermal sensor array in this paper, the sensor array is integrated by using a 2P4M 0.35°m standard CMOS technology. This proposed architecture shows a high resolution with two orders higher than the circuits without CDS. The results have shown that integrated thermopile array with WTA and CDS can approach a high level of development, reliability and easy for high accuracy infrared tracking applications.