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J. YI1,* , R. YE1
The basic theory for direct injection model in an optical imaging sensor is discussed. Both the tranconductance of an input gate and the impedance of a photodiode are the main factors that influence the injection efficiency at a low operation frequency. In addition, the injection efficiency decreases with the increase of the frequency at high sampling frequencies. A direct injection efficiency of near 100% can be achieved by using a special current mirroring direct injection, even when the impedance of the photodiode is low. A circuit design and implementation for the current mirroring direct injection model with an InSb 64 pixel linear array have been proposed. Testing results match with the theoretical analysis.
Direct injection model, Readout circuit, Injection efficiency, Current mirroring direct injection.
J. YI, R. YE, Injection efficiency for direct injection model in an optical sensor, Optoelectronics and Advanced Materials - Rapid Communications, 3, 6, June 2009, pp.600-603 (2009).
Submitted at: May 19, 2009
Accepted at: June 15, 2009
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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