Design and Fabricate the High Sensitivity and Stable Optocoupling Sensor
Lei TIAN, Lai Xinquan · DOAJ (DOAJ: Directory of Open Access Journals) · 2013
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.