Patent ID: 8878131

Claim:
An infrared light detector comprising: at least one sensor chip ( 3 , 4 ) that includes a layer element ( 5 , 8 ) made of a pyroelectrically sensitive material, a base electrode ( 6 , 9 ) and a head electrode ( 7 , 10 ), wherein the layer element ( 5 , 8 ) is connected to the base electrode ( 6 , 9 ) and the head electrode ( 7 , 10 ) to tap an electrical signal generated in the layer element ( 5 , 8 ) as a result of light ( 2 ) radiation applied to the base electrode ( 6 , 9 ) and the head electrode ( 7 , 10 ), and a transimpedance amplifier ( 11 , 12 ) for amplifying the signal, with an operational amplifier ( 19 , 25 ) which is operated asymmetrically by a supply voltage source ( 13 ) having a positive supply voltage, wherein the base electrode ( 6 , 9 ) is connected to the inverting input ( 21 , 27 ) of the operational amplifier ( 19 , 25 ), and a voltage divider ( 15 ) connected to ground ( 14 ) at the supply voltage source ( 13 ) includes a partial node ( 18 ) where a partial voltage that is lower than the supply voltage is present, wherein the partial node ( 18 ) is electrically coupled to the non-inverting input ( 20 , 26 ) as well as to the head electrode ( 7 , 10 ).