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Time-to-Digital Converters (TDCs) are a crucial tool in a wide array of fields, in particular for quantum communication, where time taggers performance can severely affect the quality of the entire application. Nowadays, FPGA-based TDCs…

Signal Processing · Electrical Eng. & Systems 2026-02-26 Matías Rubén Bolaños , Daniele Vogrig , Paolo Villoresi , Giuseppe Vallone , Andrea Stanco

Time-to-Digital Converters (TDCs) are major components for the measurements of time intervals. Recent developments in Field-Programmable Gate Array (FPGA) have enabled the opportunity to implement high-performance TDCs, which were only…

Systems and Control · Electrical Eng. & Systems 2024-10-28 Yuanyuan Hua , Danial Chitnis

We present a Time-to-Digital Converter (TDC) implemented on a 16 nm Xilinx UltraScale Plus FPGA that achieves a resolution of 1.15 ps, RMS precision of 3.38 ps, a differential nonlinearity (DNL) of [-0.43, 0.24] LSB, and an integral…

Hardware Architecture · Computer Science 2025-11-11 Sunwoo Park , Byungkwon Park , Eunsung Kim , Jiwon Yune , Seungho Han , Seunggo Nam

Time-to-digital converters (TDCs) are used in various fields, including high-energy physics. One advantage of implementing TDCs in field-programmable gate arrays (FPGAs) is the flexibility on the modification of the logics, which is useful…

Instrumentation and Detectors · Physics 2018-01-29 Yuta Sano , Yasuyuki Horii , Masahiro Ikeno , Osamu Sasaki , Makoto Tomoto , Tomohisa Uchida

Time to Digital Converters (TDCs) are very common devices in particles physics experiments. A lot of "off-the-shelf" TDCs can be employed but the necessity of a custom DAta acQuisition (DAQ) system makes the TDCs implemented on the…

Instrumentation and Detectors · Physics 2020-09-07 A. Balla , M. Beretta , P. Ciambrone , M. Gatta , F. Gonnella , L. Iafolla , M. Mascolo , R. Messi , D. Moricciani , D. Riondino

For high-speed quantum key distribution systems, error reconciliation is often the bottleneck affecting system performance. By exchanging common information through a public channel, the identical key can be generated on both communicating…

Quantum Physics · Physics 2016-11-17 Ke Cui , Jian Wang , Hong-fei Zhang , Chun-li Luo , Ge Jin , Teng-yun Chen

As an important part of the field programmable gate array (FPGA) market, Intel FPGA has also great potential for implementation of time-to-digital convertor (TDC). In this paper, the basic tapped delay line (TDL) TDC structure is adapted in…

Instrumentation and Detectors · Physics 2018-06-01 Jie Kuang , Yonggang Wang

Time-digital Converter (TDC) aims to measure the arrival time of the leading edge of the pulse signal. Our recent work presented a high resolution multi-phase TDC based on the Kintex-7 Field Programmable Gate Array (FPGA) device. A simple…

Instrumentation and Detectors · Physics 2020-12-30 Xue Dong , Cong Ma , Xiaokun Zhao , Xing Li , Zhenqiang Huang

We have developed a Time-to-Digital Converter (TDC) application in a Xilinx Kintex-7 Field Programmable Gate Array (FPGA). This TDC, based on the Tapped-Delay Line (TDL) and Wave Union A (WU-A) techniques, achieves an independent time…

Instrumentation and Detectors · Physics 2024-12-30 Zehong Liang , Xiongbo Yan , Zhe Ning , Jun Hu , Xiaoshan Jiang , Yunhua Sun , Weiyan Pan , Jingbo Ye

This paper presents a novel encoding method for fine time data of a tapped delay line (TDL) time-to-digital Converter (TDC). It is based on divide-and-conquer strategy, and has the advantage of significantly reducing logic resource…

Space Physics · Physics 2022-09-07 Wenhao Dong , Changqing Feng , Junchen Wang , Zhongtao Shen , Shubin Liu , Qi An

This study presents a novel field-programmable gate array (FPGA)-based Time-to-Digital Converter (TDC) design suitable for high timing resolution applications, utilizing two new techniques. First, a cross-detection (CD) method is introduced…

Instrumentation and Detectors · Physics 2024-10-15 Daehee Lee , Minseok Yi , Sun Il Kwon

Timing degradation in SRAM-based FPGAs arises from multiple physical mechanisms that manifest differently in the routing fabric, most notably power-distribution-network (PDN) marginality and configuration-induced routing perturbations.…

Signal Processing · Electrical Eng. & Systems 2026-03-12 Mostafa Darvishi

With improved gate calibrations reducing unitary errors, we achieve a benchmarked single-qubit gate fidelity of 99.95% with superconducting qubits in a circuit quantum electrodynamics system. We present a method for distinguishing between…

Quantum Physics · Physics 2016-01-13 Sarah Sheldon , Lev S. Bishop , Easwar Magesan , Stefan Filipp , Jerry M. Chow , Jay M. Gambetta

In this paper, we investigate the impact of bit flip errors in FPGA memories in control electronics on quantum computing systems. FPGA memories are integral in storing the amplitude and phase information pulse envelopes, which are essential…

Quantum Physics · Physics 2024-05-12 Subrata Das , Avimita Chatterjee , Swaroop Ghosh

We experimentally realize a measurement-device-independent quantum key distribution (MDI-QKD) system based on cost-effective and commercially available hardware such as distributed feedback (DFB) lasers and field-programmable gate arrays…

In contemporary Electronic Design Automation (EDA) tools, security often takes a backseat to the primary goals of power, performance, and area optimization. Commonly, the security analysis is conducted by hand, leading to vulnerabilities in…

Cryptography and Security · Computer Science 2024-02-07 Lennart M. Reimann , Anshul Prashar , Chiara Ghinami , Rebecca Pelke , Dominik Sisejkovic , Farhad Merchant , Rainer Leupers

Clock synchronization is critical for maintaining low error rates in quantum key distribution. Here, we describe how a frequency mismatch between the transmitter and receiver clocks affects the quantum bit error rate in quantum key…

Quantum Physics · Physics 2026-05-27 Loïc Millet , Boris Korzh , Rob Thew , Gianluca Boso

The discrete variables (DV) time-frequency (TF) quantum key distribution (QKD) protocol is a BB84 like protocol, which utilizes time and frequency as complementary bases. As orthogonal modulations, pulse position modulation (PPM) and…

The security of quantum key distribution (QKD) is severely threatened by discrepancies between realistic devices and theoretical assumptions. Recently, a significant framework called the reference technique was proposed to provide security…

Quantum Physics · Physics 2022-11-21 Jie Gu , Xiao-Yu Cao , Yao Fu , Zong-Wu He , Ze-Jie Yin , Hua-Lei Yin , Zeng-Bing Chen

Characterizing the physical channel and calibrating the cryptosystem hardware are prerequisites for establishing a quantum channel for quantum key distribution (QKD). Moreover, an inappropriately implemented calibration routine can open a…

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