Proton Sound Detectors sense the weak acoustic signal emitted by a proton beam that collides with an energy absorber. This paper presents the complete design and electrical characterization of a 28 nm CMOS Analog-Front-End (AFE) for detection of proton-induced acoustic signals generated by a 20 MeV acceleration beam. The proposed AFE is the core of a cross-domain detector composed by the Acoustic Sensor (feeding the AFE) and the Digital Signal Processing (driven by the AFE). The device consumes 4.9 mW and performs <3 nV/√Hz Input Referred Noise Power Spectral Density. Total Harmonic Distortion is -40 dB at 2 MHz and 1.16 dBm single tone, for 37.5 dB final Signal-to-Noise-Ratio (SNR).
Vallicelli, E., Baschirotto, A., De Matteis, M. (2021). 2.6-MHz 4.9-mW 37.5 dB-SNR Analog Front-End for Proton Sound Detectors in 28 nm CMOS. In 2021 28th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2021 - Proceedings (pp.1-4). Institute of Electrical and Electronics Engineers Inc. [10.1109/ICECS53924.2021.9665551].
2.6-MHz 4.9-mW 37.5 dB-SNR Analog Front-End for Proton Sound Detectors in 28 nm CMOS
Vallicelli E. A.;Baschirotto A.;De Matteis M.
2021
Abstract
Proton Sound Detectors sense the weak acoustic signal emitted by a proton beam that collides with an energy absorber. This paper presents the complete design and electrical characterization of a 28 nm CMOS Analog-Front-End (AFE) for detection of proton-induced acoustic signals generated by a 20 MeV acceleration beam. The proposed AFE is the core of a cross-domain detector composed by the Acoustic Sensor (feeding the AFE) and the Digital Signal Processing (driven by the AFE). The device consumes 4.9 mW and performs <3 nV/√Hz Input Referred Noise Power Spectral Density. Total Harmonic Distortion is -40 dB at 2 MHz and 1.16 dBm single tone, for 37.5 dB final Signal-to-Noise-Ratio (SNR).
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