Niu Xiaokang, Li Lianming, Wu Xu, Wang Dongming
National Mobile Communications Research Laboratory, Southeast University, Nanjing 210000, China.
Purple Mountain Laboratory, Nanjing 210000, China.
Sensors (Basel). 2022 Feb 6;22(3):1225. doi: 10.3390/s22031225.
This paper presents a temperature-insensitive wideband cryogenic amplifier for superconducting nanowire single-photon detectors (SNSPD). With a proposed folded diode-connected transistor load to realize a good device-tracking feature, the theoretical derivations the simulations and test results prove that the amplifier-gain cell has a stable gain performance over a wide temperature range, solving the issues of a lack of the accurate cryogenic device models. The amplifier achieves a gain of 26 dB from 100 kHz to 1 GHz at 4.2 K, consuming only 1.8 mW from a 1.8 V supply. With a 0.13-μm SiGe BiCMOS process, the chip area is 0.5 mm².
本文提出了一种用于超导纳米线单光子探测器（SNSPD）的温度不敏感宽带低温放大器。通过采用一种折叠二极管连接晶体管负载的设计方案来实现良好的器件跟踪特性，理论推导、仿真和测试结果表明，该放大器增益单元在很宽的温度范围内具有稳定的增益性能，解决了缺乏精确低温器件模型的问题。该放大器在4.2 K温度下，从100 kHz到1 GHz频率范围内实现了26 dB的增益，由1.8 V电源供电时功耗仅为1.8 mW。采用0.13-μm SiGe BiCMOS工艺，芯片面积为0.5 mm²。
