发明名称 |
Event-driven charge-coupled device design and applications therefor |
摘要 |
An event-driven X-ray CCD imager device uses a floating-gate amplifier or other non-destructive readout device to non-destructively sense a charge level in a charge packet associated with a pixel. The output of the floating-gate amplifier is used to identify each pixel that has a charge level above a predetermined threshold. If the charge level is above a predetermined threshold the charge in the triggering charge packet and in the charge packets from neighboring pixels need to be measured accurately. A charge delay register is included in the event-driven X-ray CCD imager device to enable recovery of the charge packets from neighboring pixels for accurate measurement. When a charge packet reaches the end of the charge delay register, control logic either dumps the charge packet, or steers the charge packet to a charge FIFO to preserve it if the charge packet is determined to be a packet that needs accurate measurement. A floating-diffusion amplifier or other low-noise output stage device, which converts charge level to a voltage level with high precision, provides final measurement of the charge packets. The voltage level is eventually digitized by a high linearity ADC.
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申请公布号 |
US2004026623(A1) |
申请公布日期 |
2004.02.12 |
申请号 |
US20030391061 |
申请日期 |
2003.03.18 |
申请人 |
DOTY JOHN P.;RICKER GEORGE R.;BURKE BARRY E.;PRIGOZHIN GREGORY Y. |
发明人 |
DOTY JOHN P.;RICKER GEORGE R.;BURKE BARRY E.;PRIGOZHIN GREGORY Y. |
分类号 |
H04N5/32;H04N5/357;H04N5/372;H04N5/378;(IPC1-7):G01T1/24 |
主分类号 |
H04N5/32 |
代理机构 |
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代理人 |
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地址 |
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