A readout integrated circuit is proposed according to the application requirement of the linear arrange infrared detectors.First,system structure and operation principle of the readout circuit are analyzed.Then,a kind of capacitor feed back trans-impedance amplifier (CTIA) and correlated double sample (CDS) circuit are designed seriously,as well as the sequential circuit.The weak current signal can be read out accurately by using CTIA.In order to reduce the fixed pattern noise (FPN) induced by CTIA,CDS circ...