US Patent No: 6,384,413

Number of patents in Portfolio can not be more than 2000

Focal plane infrared readout circuit

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Abstract

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An infrared imager, such as a spectrometer, includes multiple infrared photodetectors and readout circuits for reading out signals from the photodetectors. Each readout circuit includes a buffered direct injection input circuit including a differential amplifier with active feedback provided through an injection transistor. The differential amplifier includes a pair of input transistors, a pair of cascode transistors and a current mirror load. Photocurrent from a photodetector can be injected onto an integration capacitor in the readout circuit with high injection efficiency at high speed. A high speed, low noise, wide dynamic range linear infrared multiplexer array for reading out infrared detectors with large capacitances can be achieved even when short exposure times are used. The effect of image lag can be reduced.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CALIFORNIA INSTITUTE OF TECHNOLOGYPASADENA, CA2726

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Pain, Bedabrata Los Angeles, CA 78 1448

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
5,515,003 Operational amplifier 23 1995

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
NIKON CORPORATION (6)
8,013,927 Solid-state image sensors 0 2006
8,013,921 Solid-state imaging device, electronic camera 2 2008
8,174,088 Solid state imaging device 0 2010
8,134,622 Imaging device 2 2010
8,269,870 Imaging device for suppressing variations in electric potentials 0 2010
8,710,422 Imaging device 0 2013
 
L-3 COMMUNICATIONS CORPORATION (2)
7,268,607 Integrating capacitance circuitry for an integrating amplifier and related method 1 2005
8,183,513 In-cell current subtraction for infrared detectors 0 2009
 
EM MICROELECTRONIC-MARIN SA (1)
6,849,845 Low power integrating circuit for use with a photodetector and optical sensor including such an integrating circuit 7 2002
 
SHARP KABUSHIKI KAISHA (1)
8,139,055 Combined image sensor and display device 2 2007
 
SOCIETE FRANCAISE DE DETECTEURS INFRAROUGES - SOFRADIR (1)
8,283,618 Method and device for reading electrical charges produced by a photo-detector, and detector comprising such devices 0 2009
 
SONY CORPORATION (1)
8,149,309 Solid-state imaging device and camera system 2 2008