用于单光子雪崩二极管阵列DCR调节的全集成自适应偏置电路

IF 2.5 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-08-19 DOI:10.1109/LPT.2025.3600322

Hanwen Zhang;Chao Tang;Zerong Hu;Yukang Xie;Baiquan Liu;Shaolin Liao;Xianbo Li

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引用次数: 0

摘要

大型阵列中每个单光子雪崩二极管（SPAD）的击穿电压（VBD）通常会因工艺变化而变化，从而导致整个阵列中SPAD的超偏置电压（VEX）和检测性能的变化。本文提出了一种全集成的SPAD暗计数率（DCR）调节自适应偏置电路，利用DCR作为不同SPAD的均匀性指标，利用可调时窗计数器获得每个SPAD的DCR，并通过连接到每个SPAD阳极的可编程补偿电流进行DCR调节，以确保所有SPAD的DCR相似。该自适应偏置电路采用标准的180 nm CMOS工艺制作，实现了460 mV的电压调谐范围，使目标DCR为2 kHz时，宏像素中4个spad的DCR变化率（最大DCR /最小DCR）从15.2降至4.1。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A Fully-Integrated Adaptive Bias Circuit for DCR Regulation in Single-Photon Avalanche Diode Arrays

The breakdown voltage (VBD) of each single-photon avalanche diode (SPAD) in a large array typically varies due to process variations, leading to variations in excess bias voltage (VEX) and detection performance of SPADs across the array. In this letter, a fully-integrated adaptive bias circuit for dark count rate (DCR) regulation in SPADs is proposed, where DCR is utilized as a uniformity indicator of different SPADs, and a counter with an adjustable time window is employed to obtain the DCR of each SPAD, and DCR regulation is performed via programmable compensation current connected to the anode of each SPAD to ensure similar DCR of all SPADs. Fabricated in a standard 180 nm CMOS process, the proposed adaptive bias circuit achieves a voltage tuning range of 460 mV, which suppresses DCR variation ratio (maximum DCR / minimum DCR) from 15.2 to 4.1 among four SPADs in a macro-pixel for a target DCR of 2 kHz.

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.