Pin-compatible infrared light detector having improved thermal stability
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United States of America Patent
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Nov 4, 2014
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app pub date -
May 11, 2011
filing date -
May 12, 2010
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Abstract
An infrared light detector including at least one sensor chip that has a layer element that is produced from a pyroelectrically sensitive material and further has a base electrode and a head electrode, to which the layer element is connected for tapping electric signals generated in the layer element by irradiation of the at least one sensor chip with light. The detector further includes a transimpedance amplifier for amplifying the signals with an operational amplifier, which is asymmetrically operated by a supply voltage source having a positive supply voltage and to the inverting input of which the base electrode is connected. At the voltage supply source, a voltage divider connected to ground is provided with a partial node, to which a partial voltage that is smaller than the supply voltage is applied and which is electrically coupled to the non-inverting input and to the head electrode.
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