This paper presents a simultaneous bidirectional asymmetrical serial interface architecture for sensor systems. The proposed current/voltage dual-mode signaling scheme provides system synchronous clock and continuous data transmission between sensor integrated circuit (IC) and system-on-a-chip (SoC) using a single wire, which minimizes pin requirements on packages. Two types of transceiver circuits were implemented in a 65 nm CMOS technology for the sensor IC and the SoC, and they were designed for transmission rates of 1 Mb/s and 250 Kb/s, core areas of 0.008 mm2 and 0.142 mm2, and power consumptions of 7.1 μW and 145.8 μW, respectively. The transceiver circuit for the sensor IC was also applied to a monolithic PPG sensor implemented in 180 nm CMOS, and the acquisition and transmission of PPG sensor data with the transceiver for the SoC, implemented in 65 nm, was successfully achieved.

中文翻译：

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传感器系统的电流/电压双模单线同时双向接口架构

本文提出了一种用于传感器系统的同时双向非对称串行接口体系结构。拟议的电流/电压双模式信令方案使用单根导线在传感器集成电路（IC）和片上系统（SoC）之间提供系统同步时钟和连续数据传输，从而最大程度地减少了封装上的引脚要求。在65 nm CMOS技术中为传感器IC和SoC实现了两种收发器电路，它们的设计传输速率分别为1 Mb / s和250 Kb / s，核心面积为0.008 mm2和0.142 mm2以及功率功耗分别为7.1μW和145.8μW。传感器IC的收发器电路也应用于以180 nm CMOS实现的单片PPG传感器，并通过SoC收发器获取和传输PPG传感器数据，