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US 10,209,374 B2Granted
Radiation detector
AssigneeSharp Kabushiki Kaisha
InventorsKunihiko Iizuka, Katsuhisa Kashiwagi, Shigenari Taguchi
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Abstract
A detectable range for an output signal corresponding to charge stored at a pixel is widened in a radiation detector based on an APS method. A resistor (42) is connected to a region between a pixel (12) and a signal readout circuit (21) in a signal output line (51). The resistor (42) is set so as to draw, from the signal output line (51), a current approximately equivalent to a bias current which flows to an amplifier transistor (16) when no charge is stored in a charge storage part (14).
Claims5
A radiation detector comprising:
- a pixel having a charge storage part which stores charge corresponding to the dose of radiation and a current signal generation part which generates a current signal corresponding to the amount of charge stored in the charge storage part;
- a signal output line which is connected to the pixel;
- and
- a signal readout circuit which reads out the current signal input from the pixel via the signal output line, wherein
- the radiation detector includes a current adjustment part which is connected to a region between the pixel and the signal readout circuit in the signal output line, and
- the current adjustment part draws or feeds, from or into the signal output line, a current approximately equivalent to a bias current which flows to the current signal generation part when no charge is stored in the charge storage part.
3 more elements
Dependencies are inferred from the claim text.