非冷却型赤外線センサの低ノイズオンチップ読み出し回路

概要

論文の詳細を見る
A readout circuit for 320 x 240 uncooled infrared microbolometer FPA has been developed. The readout circuit has features such as the common-base integration, the bias canceling, the direct FPN compensation and BiCMOS. The commom-base integration circuit can directly integrate the bolometer current and exhibits low noise and no degradation of the signal. To minimize noise in the post integration circuit, the integration gain has to be increased. The bias canceling circuit and the FPN compensation circuit are directly connected to the integration capacitor and the integration gain of approximately 20〜30 has been achieved by removing the unnecessary current component from the integration current. This operation has served to increase the signal current at the same time. BiCMOS process contributes to reduction in the 1/f noise. By employing 37μm unit cell, the lens size has decreased and the camera size can be made small. Equivalent input noise became 6.2μVrms.
社団法人映像情報メディア学会の論文
2000-02-25