Reading circuit of uncooled infrared focal plane array detector

The embodiment of the present invention discloses a reading circuit of an uncooled infrared focal plane array detector. The reading circuit provided by the invention comprises; a bias thermal stability circuit 10 including a channel-level reference micrometering bolometer Rb and configured to supply a constant bias current for the channel-level reference micrometering bolometer Rb; a detection circuit 20 configured to connect a pixel-level detection micrometering bolometer Rs and the bias thermal stability circuit 10 and generate detection output signals according to the reference micrometering bolometer Rb and the detection micrometering bolometer Rs; and an integral circuit 30 configured to connect with the detection circuit 20 and perform integration according to the detection output signals of the detection circuit 20 to obtain output signals. According to the embodiment of the invention, the reading circuit is configured to supply a steady current path to a reference micrometering bolometer so that the bias thermal stabilization is realized, the uniformity and the reliability of the whole circuit is greatly improved, and the high pressure resistance performance of the circuit and the adaptability of the circuit to the environment are greatly increased.