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优质光伏InSb二极管与场效应晶体管(FET)多路传输(MUX)线路联结,实现了有用的电荷积分。已研制出一种由场效应晶体管多路传输器与128个InSb二极管线列耦合的试验性探测器组件。第一级结型场效应晶体管(J-FET)前放、象元复位开关、多路传输器及InSb阵列都装在一个小体积(1—3/4英寸×1×1/8英寸)的混合微型电路中。还采用了混成式制作技术所固有的低视频线路电容的低噪声前放布局。测量表明:信噪比超过1000:1,响应均匀性为±2％。实例图象能显示出微小的细节,证实了估算的辐射测量灵敏度为0.01K NE△t(噪声等效温差)。
High-quality photovoltaic InSb diodes are coupled with field-effect transistor (FET) multiplex (MUX) lines to achieve useful charge integration. A tentative detector assembly has been developed that combines field-effect transistor multiplexers with 128 InSb diode line arrays. The first junction field effect transistor (J-FET) preamplifier, the pixel reset switch, the multiplexer, and the InSb array are housed in a small volume (1-3 / 4 in x 1 x 1/8 in) Mixed microcircuitry. It also incorporates a low-noise preamplifier layout of low video line capacitance inherent in hybrid production technology. Measurements show that the signal to noise ratio exceeds 1000: 1 and the response uniformity is ± 2%. The example image shows minute details, confirming that the estimated radiometric sensitivity is 0.01 K NE Δt (noise equivalent temperature difference).