发明名称 |
PIXEL CIRCUIT WITH CAPACITOR DISCHARGE INDICATIVE OF NUMBER OF EVENTS |
摘要 |
A pixel circuit includes a single photon avalanche diode (SPAD) and a measurement circuit including a capacitance. The circuit is operable to discharge a known portion of the charge on the capacitance upon each detection of a SPAD event within a time period, such that the charge remaining on the capacitance at the end of the time period corresponds to the number of SPAD events detected within the time period. A time resolved imaging apparatus includes an array of such pixel circuits. A method of counting photon detection includes sensing photons with a SPAD device and discharging a known portion of the charge on a capacitance upon each detection of a SPAD event within a time period. |
申请公布号 |
US2014124653(A1) |
申请公布日期 |
2014.05.08 |
申请号 |
US201314066853 |
申请日期 |
2013.10.30 |
申请人 |
THE UNIVERSITY COURT OF THE UNIVERSITY OF EDINBURGH;STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED |
发明人 |
DUTTON NEALE;HENDERSON ROBERT KERR |
分类号 |
H01L27/146 |
主分类号 |
H01L27/146 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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