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Vol. 157, Issue 10, October 2013, pp. 14-19




Design and Fabricate the High Sensitivity and Stable Optocoupling Sensor
1 Lei TIAN, 1,2 Xinquan LAI

1 Institute of Electronic CAD, Xidian University, Xi'an, Shaanxi 710071, PR China

2 Key Lab of High-Speed Circuit Design and EMC, Ministry of Education, Xidian University, Xi'an, Shaanxi 710071, PR China

1 Tel.: +086-15929907626, fax: 029-88201563
E-mail: tianlei@xupt.edu.cn


Received: 19 August 2013   /Accepted: 25 September 2013   /Published: 31 October 2013

Digital Sensors and Sensor Sysstems


Abstract: A novel photodetector array (PD) and the high sensitivity transimpedance amplifier (TIA) were designed and fabricated for predicting response time based on the optocoupling sensor, implemented in a standard 0.35 m BCD technology. Based on response time equivalents and the architecture of the optocoupling sensor the response time of the PD were detailed analyzed. The circuit structure and the adjustable gain theory of the TIA module was clarified detailed. At a wavelength of 840 nm, from -25 C to 125 C, the simulation results showed that the PD has a high-speed and stable capability. The test results confirm the response time of the whole sensor is 205 ns and 153 ns and the response time would not change with the variation of the temperature.


Keywords: Optocoupling, Photodetector, Response time, Stability, Sensitivity.



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