In this paper, we present a simple method to analyze the injection efficiency of the photodiode interface circuit under fast shuttering conditions for active Imaging applications. This simple model has been inspired from the companion model for reactive elements largely used in CAD. In this paper, we demonstrate that traditional CTIA photodiode interface is not adequate for active imaging where fast and precise shuttering operation is necessary. Afterwards we present a direct amplification based photodiode interface which can provide an accurate and fast shuttering operation on photodiode. These considerations have been used in NIT’s newly developed ROIC and corresponding SWIR sensors both in VGA 15um pitch (NSC1201) and also in QVGA 25um pitch (NSC1401).

New Imaging Technologies is a French companypioneer in Wide Dynamic Range solutions. With over 15 years of academic research and our patented MAGIC™ pixel technology, wemaster all the stepsfrom the sensor design to complete camera engineering. Our core team clusters experienced CMOS designers, all recognized experts in their fields,with a multi- disciplinary group of optical, mechanical and electronicengineers. With sales partners in over 20 countries weaddressmost efficiently any customer requestsaround the globe. NIT offers a complete portfolio of cameras and detectors embracing Visible, Intensified(I-CMOS) and SWIR technology. NIT serves variousmarkets such as machine vision,instrumentation, night vision, biometrics… NIT also proposes flexible solutions and custom designs to best fit yourspecificrequirements.