一种面向大面阵焦平面阵列的低功耗多功能读出电路设计

A Low Power Multi-Function Readout Circuit for Large Format Focal Plane Array

摘要:

大面阵焦平面成像探测器需要具有随机开窗和反转读出功能,同时需要降低功耗。文章基于标准数字电路设计流程。设计了一种新型的基于格雷码编码规律的寻址计数器,用于对阵列的行地址和列地址进行寻址,提高了寻址的可靠性。对设计进行RTL级仿真,结果表明该设计能够实现任意开窗和反转读出功能。采用TSMC90工艺库对1024×1024阵列规模的RTL级设计进行分析计算,结果显示供电电压为3.3V时,寻址计数器功耗仅为19.56μW,整体设计功耗仅为58.75μW,适用于大面阵焦平面读出电路的设计。

Abstract:

Dynamic windowing readout and image transposition are significant functions of large format focal plane imaging detector, and also it is necessary to realize low power consumption. Based on the standard digital circuit design process, a new counter based on Gray code was designed to access the row and column address. The RTL simulation results show that the proposed design can achieve the functions of dynamic windowing readout and dynamic image transposition. A TSMC 90-nm process with 3.3V supply voltage was used to implement a 1024×1024 design, and it concluded that the power consumption of the addressing counter is only 19.56μW and the overall design power is only 58.75μW. This design is suitable for the design of readout circuit of large format focal plane system.