| Title |
A Readout Circuit for Superconducting Nanowire Single Photon Detector using a Cryogenic Energy-scalable Floating Inverter Amplifier |
| Authors |
박창주(Changjoo Park) ; 정완영(Wanyeong Jung) |
| DOI |
https://doi.org/10.5573/ieie.2023.60.11.104 |
| Keywords |
Cryogenic; Energy-scalability; Floating inverter amplifier; Readout circuit; Superconducting nanowire single photon detector |
| Abstract |
This paper presents a floating inverter amplifier (FIA) that enables automatic energy scaling based on its input difference. The energy-scalable FIA saves redundant energy consumption while maintaining the current-efficiency improvement achieved by the current-reuse technique in conventional FIA. It can be particularly advantageous in applications detecting sparse pulse signals. We demonstrate the presented FIA's enhanced energy-efficiency by implementing it in a cryogenic analog-front-end for a superconducting nanowire single photon detector (SNSPD) in 65 nm CMOS technology. At 4.2 K, the readout operates at a maximum speed of 1 GHz while consuming 21.0 μW from 1.2 V supply, which is approximately 8.33 % less power consumption than the readout system consists of the conventional FIA that consumes 23.0 μW. |