A Current Calibration Circuit for a 14-Bit Column-Parallel Dual-Ramp Single-Slope ADC in Infrared Image Sensors

IF 4 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems II: Express Briefs Pub Date : 2024-07-09 DOI:10.1109/TCSII.2024.3425595

Omer Lutfi Nuzumlalı;Tufan Coskun Karalar

引用次数: 0

Abstract

This brief introduces a current calibration circuit that is specifically designed for use in a column-parallel Dual-Ramp Single-Slope (DRSS) ADC. This circuit creates two current sources with a precise current ratio. These currents are then used in coarse and fine conversion stages. The desired current ratio can be achieved by adjusting the integration times based on standard clock sources in typical CMOS circuits. A 14-bit DRSS ADC that utilizes this calibration technique has been implemented in a

$0.18~\mu $

m CMOS technology to be used in an Infrared Detector (IR) Read-Out Integrated Circuit (ROIC). Experiments demonstrate that a DNL error smaller than ±0.4 LSB is successfully achieved when the current calibration circuit is active.

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红外图像传感器中 14 位列式并行双斜坡单斜坡 ADC 的电流校准电路

本简介介绍一种电流校准电路，专门设计用于列并联双斜坡单斜坡 (DRSS) ADC。该电路可创建两个具有精确电流比的电流源。这些电流随后用于粗转换和精转换阶段。根据典型 CMOS 电路中的标准时钟源调整积分时间，即可实现所需的电流比。采用这种校准技术的 14 位 DRSS ADC 已在 0.18~\mu $ m CMOS 技术中实现，将用于红外探测器（IR）读出集成电路（ROIC）。实验证明，当当前校准电路激活时，可成功实现 DNL 误差小于 ±0.4 LSB。

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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来源期刊

IEEE Transactions on Circuits and Systems II: Express Briefs 工程技术-工程：电子与电气

CiteScore

7.90

自引率

20.50%

发文量

883

审稿时长

3.0 months

期刊介绍： TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: Circuits: Analog, Digital and Mixed Signal Circuits and Systems Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic Circuits and Systems, Power Electronics and Systems Software for Analog-and-Logic Circuits and Systems Control aspects of Circuits and Systems.