CMOS图像传感器LVDS驱动器电路设计

吉林大学学报(信息科学版)

CMOS图像传感器LVDS驱动器电路设计

藏范军¹，常玉春¹，刘洋²，纪永成¹，郭杨钰²，马成²，王欣洋²

1．吉林大学电子科学与工程学院，长春130012; 2．长春长光辰芯光电技术有限公司芯片部，长春130012

收稿日期:2018-03-16 出版日期:2018-07-24
通讯作者: 常玉春( 1973— ) ，男，吉林公主岭人，吉林大学教授，主要从事模拟、数字集成电路设计研究，( Tel) 86-13180826212( E-mail) changyc@ jlu． edu． cn。
作者简介:藏范军( 1991— ) ，男，河北保定人，吉林大学硕士研究生，主要从事CMOS 图像传感器读出电路研究，( Tel) 86- 18744025761( E-mail) zangfanjun@163． com。
基金资助:
吉林省科技厅科技发展计划基金资助项目( 20160204042GX)

Design of Low-Voltage Differential Signaling Driver for CMOS Image Sensor

ZANG Fanjun¹，CHANG Yuchun¹，LIU Yang²，JI Yongcheng¹，GUO Yangyu²，MA Cheng²，WANG Xinyang²

1． School of Electronic Science and Engineering，Jilin University，Changchun 130012，China;2． Integrated Circuit Department，Gpixel，Changchun 130012，China

Received:2018-03-16 Online:2018-07-24

摘要/Abstract

摘要： 为解决在2． 5 V 供电下的LVDS( Low Voltage Differential Signaling) 驱动器处理1． 2 V 数字信号时，由于传统电平转换电路性能较差，且易产生误码的问题，设计了一款应用于CMOS ( Complementary Metal Oxide Semiconductor) 图像传感器芯片的LVDS 接口电路，该芯片中数字电路采用1． 2 V 供电，LVDS 驱动器使用2． 5 V供电。笔者提出两种电平转换电路方案，用于解决该问题。方案1 将1． 2 V 数字信号进行电平转换，再使用D 触发器对转换后的信号进行采样，从而避免误码的产生; 方案2 使用迟滞比较器作为电平转换电路。设计采用TowerJazz 65 nm CMOS 工艺进行流片验证。经过测试，两种方案均有效地解决了LVDS 驱动器误码的问题。

关键词: CMOS 图像传感器, 电平转换, LVDS 驱动器

Abstract: In order to solve the problem of processing 1． 2 V digital signal in LVDS( Low Voltage Differential Signaling) driver with 2． 5 V power supply，due to the poor performance of traditional level conversion circuit and the problem of bit error，an LVDS interface circuit for CMOS ( Complementary Metal Oxide Semiconductor)image sensor chip is designed． The digital circuit is powered by 1． 2 V and the LVDS driver is powered by 2． 5 V． This paper proposes two level shifting circuit schemes to solve this problem． In the first solution，hysteresis comparator is used as the level shifter． In the second solution，the 1． 2 V digital signal is level shifted first，then the D trigger is used to sampling the shifted signal and the error code will be avoided． TowerJazz 65 nm CMOS technological process is employed for tape-out verification． After the tests，the problem of LVDS driver error code can be efficiently solved by these two solutions．

Key words: complementary metal oxide semiconductor (CMOS) image sensor, low voltage differential signaling(LVDS) driver, level shifter

中图分类号:

TN453

藏范军，常玉春，刘洋，纪永成，郭杨钰，马成，王欣洋. CMOS图像传感器LVDS驱动器电路设计[J]. 吉林大学学报(信息科学版), 2018, 36(4): 381-385.

ZANG Fanjun，CHANG Yuchun，LIU Yang，JI Yongcheng，GUO Yangyu，MA Cheng，WANG Xinyang. Design of Low-Voltage Differential Signaling Driver for CMOS Image Sensor[J]. Journal of Jilin University(Information Science Ed, 2018, 36(4): 381-385.