Analysis of 320X240 uncooled microbolometer focal plane array ...

22conditioning electronics, timing and control logic, and on chip bias generation andmicrobolometer overheat protection circuitry.All of the 240 column detector signal path is connected to the signal conditioningnetwork located at the end of each column. The signal conditioning network iscomprised of a column differential amplifier, signal integrators, and a sample and holdnetwork. The signals coming out of the 320 sample and hold networks are shifted out tothe output driver by the output multiplexers. The U3000 is designed with an on-chip biasgeneration that generates all the necessary bias voltages to operate the UFPA. If the autobiasfunction is turned off, then the bias voltages are to be provided externally. Thehorizontal and vertical shift registers are used to control the FPA scanning. Also, end-oflineand end-of-frame Build-In Test (BIT) clocks, used by the sensor to verify normalUFPA operation, are generated by the shift registers. The BIT features are designed to