Noise Performance Evaluation of Uncooled Infrared Detectors (June 2009)

In this paper, we considered the issues related to modeling and analysis of uncooled infrared detectors noise analysis utilizing pulse train equalization technique. We first developed a mathematical model appropriate for the noise performance study of the detector and then derive the detectivity and noise equivalent temperature difference (NETD) expressions for the predetection, detection, and postdetection noise sources. Our study of the postdetection noise sources was focused on the capacitive transimpedance amplifier unit cell electronics which provides a tight control over the detector bias current and handles a lower background radiation with a superior noise performance. We developed a parametric tradeoff study which provides a guide for optimizing the bolometer noise performance through the adjustment of detector parameters. We also discussed the use of scanning format and time-delay integration technique for improving the performance of multiple arrays of detectors.