发明名称 |
STARING INFRARED FOCAL PLANE ARRAY WITH ON-FOCAL PLANE ARRAY ADAPTIVE DYNAMIC RANGE CONTROL ELECTRONICS |
摘要 |
An adaptive dynamic range control circuit architecture is disclosed that enables an IR-FPA (10) to achieve a higher dynamic range. The circuit architecture significantly reduces a resolution required for an analog-to-digital converter (ADC 24) that converts the analog output signals of the IR-FPA to a digital representation. In a preferred embodiment of this invention a column CTIA readout integrated circuit architecture is used in conjunction with the adaptive feedback circuitry of this invention to provide pedestal suppression on a per-pixel basis for the IR-FPA. The use of the circuitry of this invention modifies the conventional column CTIA amplifier configuration to a configuration having an auto-zeroed charge ratioed gain stage. One advantage to this technique is that by suppressing the charge pedestal, the usable signal output from the IR-FPA can be brought off-chip to the readout integrated circuit at a much higher gain. As a result, the ADC requires fewer bits to resolve the useable signal information and dynamic range.
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申请公布号 |
WO9634490(A1) |
申请公布日期 |
1996.10.31 |
申请号 |
WO1996US05845 |
申请日期 |
1996.04.26 |
申请人 |
SANTA BARBARA RESEARCH CENTER |
发明人 |
WOOLAWAY, JAMES, T., II;SPAGNOLIA, JOSEPH, A.;FRYE, WILLIAM, H. |
分类号 |
G01J1/44;H04N5/33;H04N5/355;H04N5/365;H04N5/369;(IPC1-7):H04N5/33 |
主分类号 |
G01J1/44 |
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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