Design and Construction of Programmable Time-to- Amplitude Converter

Salvi, Aishwarya; Chavan, Kanchan; Vaidya, Prakash D.

doi:10.1109/icoei48184.2020.9142973

Cited by 4 publications

(1 citation statement)

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“…In reality, we have the option of using a mixed-signal or all-digital technique. The Time-to-Amplitude Converter (TAC) [45] is the most popular and widely used mixed-signal TDC, in which the time interval is transformed into a voltage level and monitored by an Analog-to-Digital Converter (ADC). Instead, the most widely used fully-digital TDCs are based on the Delay-Line (DL), in which the time interval is quantized using the propagation delay of the logic gate that composes the DL and specifies the LSB, regardless of the individual circuit [46].…”

Section: ) Time-to-digital Converter Approachmentioning

confidence: 99%

Assessment of the Bundle SNSPD Plus FPGA-Based TDC for High-Performance Time Measurements

et al. 2022

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Counting single photons and measuring their arrival time is of crucial importance for imaging and quantum applications that use single photons to outperform classical techniques. The investigation of the coincidence, i.e. correlation, between photons can be used to enhance the resolution of optical imaging techniques or to transmit information using quantum cryptography. Time measurements at the state-of-the-art are performed using Superconducting Nanowire Single Photon Detectors (SNSPDs), the lowest timing jitter single-photon detectors, connected to digital oscilloscopes or digitizers. This method is not well adapted to the ever-increasing and pressing requirement to perform measurements on a high number of channels at the same time. We focus the high-performance measure of the arrival time of photons and their correlation by means of SNSPDs and a 16-channel Time-to-Digital Converter fully implemented in Field Programmable Gate Array (FPGA). In this approach, the photons' coincidence is analyzed in real-time directly in the FPGA, resulting in a Coincidence Time Resolution (CTR) of 22.8 ps r.m.s.. For the practical benefit of the scientific community, an extended and comprehensive panorama also of comparison with the actual available strategies in this field of applications is offered through a huge number of references.INDEX TERMS Time-to-Digital Converter (TDC), Superconducting Nanowire Single Photon Detector (SNSPD), Jitter, Coincidence Time Resolution (CTR), Field Programmable Gate Array (FPGA).

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Section: ) Time-to-digital Converter Approachmentioning

confidence: 99%