新型无TEC的非制冷IRFPA读出电路研究

为了降低非制冷红外焦平面阵列的功耗，研究了去除热电制冷器（TEC）等温度稳定装置的读出电路。通过对微测辐射热计的电阻温度特性的分析，设计了一种新型无需温度稳定装置的读出电路，该电路的Flash存储器存储不同温度下的校正系数，温度传感器实时检测探测器的环境温度，从Flash中取出相应的温度校正系数送入数模转换器(DAC)，通过DAC的电压输出来控制探测器偏流以进行环境温度补偿。HSPICE模拟结果表明，电路输出与探测器工作的环境温度无关，系统的总功耗下降了80%，同时电路噪声保持在一个较低的水平。

New readout circuit of uncooled infrared focal plane arrays without TEC

In order to reduce power consumption of uncooled infrared focal plane arrays,the readout circuit of temperature stabilizer eliminated thermoelectric coolers(TEC)was studied.Based on the analysis of micro-bolometer resistance-temperature characteristics,a new readout circuit was proposed.It allowed micro-bolometer operate without a temperature stabilizer over a wide range of ambient temperature.And it need a Flash memory to store the correcting factors of different temperatures and a temperature sensor to detect the ambient temperature of the micro-bolometer.By utilizing the factors in the Flash memory,Digital Analog Converter(DAC) controls the micro-bolometer bias current to compensate the fluctuation of ambient temperature.The circuit simulation results are given on HSPICE,that show the circuit output is independent of ambient temperature.And the total power consumption decreases 80% and the circuit noise keeps at a low level.