Mar 18 – 22, 2021
Stony Brook, NY
US/Eastern timezone

Low noise, low jitter cryogenic amplifier for superconducting nanowire detectors.

Mar 18, 2021, 2:20 PM
Stony Brook, NY

Stony Brook, NY

Online [US/EST Timezone]
Readout & ASICs Readout and ASIC


Davide Braga


We present the development of a cryogenic Low-Noise Amplifier (LNA) for the readout of Superconducting Nanowire Single Photon Detectors (SNSPDs). The integrated circuit operates at 4 K and is based on fourth-generation heterojunction bipolar transistors from a state-of-the-art, commercially available SiGe BiCMOS platform, which allows large scale integration and economy of scale. Target specifications for the fully differential LNA include >20 dB gain, ~6 GHz BW, ~10 ps jitter, and <10 mW/channel. We discuss cryogenic modeling of the devices, design and test results of the prototypes (AC and DC coupled), the latest received in Feb 2021. The project is a collaboration between Fermilab, Georgia Tech, Caltech and JPL. The target application is low-noise, low-jitter single photon detection for high-speed quantum networks. The scalability of this technology, however, coupled with the availability of small feature size CMOS transistors on the same die, provides a path for the integration of a large number of low-noise, fast front end readout amplifiers, together with low-power digital backend logic for digital signal processing; thus enabling large, multi-Gbps SNSPD arrays for photon and particle detection, with direct application to QIST, HEP and NP programs.

Primary authors

Davide Braga Ying Hanbin (Georgia Institute of Technology)


Boris Korzh (Jet Propulsion Laboratory) Cristián Peña (Fermilab) Farah Fahim (FERMILAB) John Cressler (Georgia Institute of Technology) Prof. Maria Spiropulu (California Institute of Technology) Matt Shaw (Jet Propulsion Laboratory) Si Xie

Presentation materials