一种低功耗GaN基紫外焦平面读出电路设计

Design of a Low-power Readout Circuit for GaN-based UV FPA

针对GaN基紫外焦平面,采用单端放大器的CTIA结构作为输入级,设计了一种小面积低功耗的读出电路,分析了电路的电荷增益、注入效率、功耗与噪声等性能指标。通过使用边积分边读出模式工作,电路功耗显著下降,当面阵大小为M×N时,仅与列数N有关。仿真结果表明,电路工作正常,电荷增益为1.6μV/e,注入效率可达96.8%,输出线性度大于99%,对噪声具有很好的抑制作用。

A novel small-area low-power readout circuit utilized by a single CTIA amplifier for GaN-base UV FPA is presented. The charge-gain, injection efficiency, power, noise and other parameters are discussed in de- tails. With the method of integrating while reading out, the power dissipation is reduced greatly and only related to the value of N when the array is M×N. The simulated results show that the circuit can work normally, the charge-gain is 1.6μV/e, the injection efficiency is over 96. 8%, the linearity of the output is larger than 99% , and the noise could be restrained remarkably.