Worcester Polytechnic Institute Electronic Theses and Dissertations Collection

Title page for ETD etd-010907-114544

Document Typethesis
Author NameColonero, Curtis Benson
TitleNoise Analysis and Simulation of a Sub-Pixel Analog to Digital Voltage-To-Frequency Converter for use with IR Focal Plane Arrays
DepartmentElectrical & Computer Engineering
  • 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/Defense2007-01-05
    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.

  • CColonero.pdf

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