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US 8,575,534 B2Granted
Cross-strip charge multiplexing readout for differential detector arrays with capacitive row and column charge splitters
AssigneeThe Board of Trustees of the Leland Stanford Junior University
InventorsPeter D. Olcott, Craig S. Levin
Life of this patent
Estimating the term…
Abstract
An array of two-terminal detectors is configured to provide output signals that provide position sensitive radiation detection (e.g., outputs A and B provide vertical position and outputs C and D provide horizontal position), and which are differential (i.e., signal A+B is equal and opposite to signal C+D). Preferably, a capacitive network is employed to provide the position sensitivity. Array outputs are preferably provided to a low impedance amplifier or opto-electronic coupler.
Claims9
Apparatus comprising:
- an array of detector elements logically arranged in a plurality of rows and a plurality of columns, wherein each of said detector elements is a two terminal device that provides a differential electrical signal at its terminals in response to incident radiation;
- row outputs OA and OB having respective row output signals A and B and column outputs OC and OD having respective column output signals C and D, wherein said row and column outputs are connected to said array such that the total row output signal A+B and the total column output signal C+D are differential signals for any detection event sensed by said array;
- a plurality of row lines, wherein each row of said detector elements corresponds to one of said row lines;
- a plurality of column lines, wherein each column of said detector elements corresponds to one of said column lines;
- a capacitive row charge splitter connected to each of said row lines, wherein said row charge splitters are all connected to said row outputs OA and OB, wherein each row charge splitter determines the splitting of charge from its corresponding row line to said row outputs OA and OB, and wherein each of said row charge splitters provides a distinct charge split ratio;
- and
- a capacitive column charge splitter connected to each of said column lines, wherein said column charge splitters are all connected to said column outputs OC and OD, wherein each column charge splitter determines the splitting of charge from its corresponding column line to said column outputs OC and OD, and wherein each of said column charge splitters provides a distinct charge split ratio;
- wherein the relative amplitude of A and B for said detection event enables vertical position determination of said detection event;
- wherein the relative amplitude of C and D for said detection event enables horizontal position determination of said detection event;
- wherein each of said detector elements has one of its terminals connected to its corresponding row line and the other of its terminals connected to its corresponding column line.
7 more elements
A method of providing position sensitive detection, the method comprising:
- providing an array of detector elements logically arranged in a plurality of rows and a plurality of columns, wherein each of said detector elements is a two terminal device that provides a differential electrical signal at its terminals in response to incident radiation;
- connecting said detector elements to row outputs OA and OB having respective row output signals A and B and to column outputs OC and OD having respective column output signals C and D such that the total row output signal A+B and the total column output signal C+D are differential signals for any detection event sensed by said array;
- providing a plurality of row lines, wherein each row of said detector elements corresponds to one of said row lines;
- providing a plurality of column lines, wherein each column of said detector elements corresponds to one of said column lines;
- providing a capacitive row charge splitter connected to each of said row lines, wherein said row charge splitters are all connected to said row outputs OA and OB, wherein each row charge splitter determines the splitting of charge from its corresponding row line to said row outputs OA and OB, and wherein each of said row charge splitters provides a distinct charge split ratio;
- and
- providing a capacitive column charge splitter connected to each of said column lines, wherein said column charge splitters are all connected to said column outputs OC and OD, wherein each column charge splitter determines the splitting of charge from its corresponding column line to said column outputs OC and OD, and wherein each of said column charge splitters provides a distinct charge split ratio;
- wherein the relative amplitude of A and B for said detection event enables vertical position determination of said detection event;
- and
- wherein the relative amplitude of C and D for said detection event enables horizontal position determination of said detection event;
- wherein each of said detector elements has one of its terminals connected to its corresponding row line and the other of its terminals connected to its corresponding column line.
8 more elements
Dependencies are inferred from the claim text.