[10a-B21-1~11] FS.1 Focused Session "AI Electronics"

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[10a-B21-7] [The 60th Young Scientist Presentation Award Speech] A physical reservoir network for high-speed signal measurement

〇Yuito Ito¹, Tomoaki Niiyama¹, Tetsuya Asai², Gouhei Tanaka³, Uchida Atsushi⁴, Satoshi Sunada¹, Anas Skalli⁵ (1.Kanazawa Univ., 2.Hokkaido Univ., 3.NITech Univ., 4.Saitama Univ., 5.FEMTO-ST inst.)

Keywords:

analog-to-digital converter,physical reservoir computing,wideband signal measurement

Analog-to-digital converters (ADCs), essential for signal measurement, face fundamental bandwidth limitations imposed by the Nyquist sampling theorem. This study presents a method to measure high-frequency signals using only low-speed ADCs, overcoming this constraint. By spatially distributing high-speed signals through a physical reservoir network (optical reservoir circuit) and capturing them with multiple low-speed ADCs, aliasing is exploited to reconstruct the original signal. We demonstrate a 4× speedup of a 6.25 GS/s ADC, achieving an effective sampling rate of 25 GS/s.