| 摘要 |
<p>An offset corrector for a focal plane array. A bolometer array configured in a row and column readout format has dedicatad column circuits to measure the resistance of each bolometer in the column. A high speed on-chip analog to digital converter converts the analog sensor signal to a digital representation. Since the response of each bolometer varies, an offset controller, connected to the output of the analog to digital converter, corrects the digital representation for variations in individual bolometer response. Each pixel has a corresponding dynamically computed offset stored in an offset memory. The offset is computed when a chopper or shutter blocks radiation from the local plane array. The focal plane array is temperature stabilized to a predetermined temperature to keep bolometer response within a predetermined bandwidth.</p> |
