Beyer Law Group LLP
Time-based digitizer for PET photodetector
An integrated circuit in a PET imaging system with a plurality of photo detectors is provided. A plurality of differential transimpedance amplifiers with differential inputs and differential outputs is provided, wherein differential inputs for each differential transimpedance amplifier of the plurality of differential transimpedance amplifiers are electrically connected to a photodetector. A plurality of level crossing analog-to-digital converters is provided wherein differential inputs for each level crossing analog-to-digital converter of the plurality of level crossing analog-to-digital converters are electrically connected to differential outputs of a differential transimpedance amplifier, wherein each level crossing analog-to-digital converter of the plurality of level crossing analog-to-digital converters, comprises a plurality of differential comparators with differential inputs and differential threshold inputs, wherein the differential inputs are electrically connected to the output of the differential outputs of the differential transimpedance amplifier electrically connected to the level crossing analog-to-digital converter and a clock.
The Board of Trustees of the Leland Stanford Junior University
G A H G H G E A H G G
G01T A61B H03F G01T H03M G01T E02D A61B H03M G01T G01T
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Mark A. Craig Steven Frances W. Y. Jaeha Hwang Ho
Horowitz Levin Lau Kim Choi