Document Type thesis Author Name Colonero, Curtis Benson URN etd-010907-114544 Title Noise Analysis and Simulation of a Sub-Pixel Analog to Digital Voltage-To-Frequency Converter for use with IR Focal Plane Arrays Degree MS Department Electrical & Computer Engineering Advisors Brian M. King, Advisor John A. McNeill, Committee Member Fred J. Looft, Department Head Keywords Sub-Pixel A/D Voltage-To-Frequency Converter Noise Analysis Simulation IR Focal Plane Array FPA Date of Presentation/Defense 2007-01-05 Availability unrestricted
The performance of a dedicated A/D converter located beneath each pixel is explored in this thesis. Specifically, a voltage to frequency converter coupled with a direct injection amplifier designed for use with an IR focal plane array is analyzed. This versatile implementation of a Readout Integrated Circuit can be found applicable to a wide variety of imaging technologies.
Noise performance of the conversion system is theoretically calculated, and is supported by SPICE simulations using valid CMOS SPICE models. It is shown that a 10 transistor sub-pixel voltage to frequency analog to digital converter will produce noise that is less than the input shot noise. Design considerations will be addressed to ensure continued performance as the scale of the imagers increase to large format arrays.
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