Infrared detection device and method

摘要

Infrared detection device comprising at least one first bolometer able to detect at least a part of infrared radiation intended to be received by the infrared detection device, and a reading and compensation circuit of a first electrical signal intended to be outputted by the first bolometer, with the reading and compensation circuit comprising at least:
one second bolometer coupled electrically to the first bolometer and insensitive to the infrared radiation intended to be received by the infrared detection device;one first reading circuit of said first electrical signal from which is subtracted a second electrical signal intended to be outputted by the second bolometer;one second reading circuit of an electrical voltage at the terminals of the first bolometer and/or of an electrical voltage at the terminals of the second bolometer, comprising a plurality of switches.

主权项

1. An infrared detection device comprising:
at least one first bolometer configured to detect at least a part of infrared radiation received by the infrared detection device; and a reading and compensation circuit configured to operate on a first electrical signal outputted by the first bolometer, the reading and compensation circuit including:
one second bolometer coupled electrically to the first bolometer and insensitive to the infrared radiation received by the infrared detection device,one first reading circuit configured to read said first electrical signal from which is subtracted a second electrical signal outputted by the second bolometer, andone second reading circuit configured to read at least one of an electrical voltage at terminals of the at least one first bolometer or an electrical voltage at terminals of the second bolometer, wherein the first reading circuit includes at least one first operational amplifier configured to carry out an integration of a first current that passes through the first bolometer, corresponding to the first electrical signal, and from which is subtracted a second current, corresponding to the second electrical signal, that passes through the second bolometer, and wherein the second reading circuit includes a plurality of switches configured to electrically connect, in a first configuration, a first input of the first operational amplifier to an electrical connection that connects the first bolometer to the second bolometer, and to electrically connect, in a second configuration, a second input of the first operational amplifier to one of the terminals of the first bolometer via one of the switches located in a pixel of the infrared detection device, the pixel including the first bolometer, and/or to one of the terminals of the second bolometer, and such that the first operational amplifier is mounted as an integrator in the first configuration and as a voltage follower in the second configuration.