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- W4220790003 abstract "Abstract This paper presents a high-speed integrated circuit for narrow-gated single-photon detection. Due to the parasitic capacitor that existed in the avalanche photo-diode (APD), the avalanche signal pulse triggered by the received photon is easy to be mixed with unavoidable spike noise arising from the gated clock. The traditional double-ended architecture extracts avalanche signals by suppressing common-mode noise. In order to overcome the shortcomings of high cost and mismatch in the traditional architecture, this paper adopts a single-ended detection architecture and deals with the problem of spike noise from the perspective of frequency domain. According to the difference between the frequency characteristics of the spike noise and the avalanche signal, the effective separation of the two signals can be realized in frequency domain by a low-pass filter with a specific cut-off frequency. The signal-to-noise ratio of the detection system is improved by using the subsequent amplification and discrimination circuit, so as to realize the sensitive detection of the avalanche signals. The proposed circuit is implemented in 180nm CMOS technology and occupies an effective area of 2.6mm 2 . The test results show that the single-ended detection system can sensitively discriminate the photon signals with the emission frequency below 20MHz when the whole circuit, including the APD, operates at a room temperature, where the minimum voltage amplitude converted from the avalanche current of the APD is around 20mV, and the stopband attenuation of the filter at 1GHz frequency is -58.8dB." @default.
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- W4220790003 date "2022-03-29" @default.
- W4220790003 modified "2023-10-16" @default.
- W4220790003 title "A high-speed single-photon detection scheme based on frequency domain filtering" @default.
- W4220790003 doi "https://doi.org/10.1088/1361-6501/ac6222" @default.
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