一个时间域多通道电阻传感器接口IC,具有高能效和广泛的输入范围
IEEE transactions on biomedical circuits and systems
|April 2, 2025
概括
本研究引入了一种72通道电阻传感器接口集成电路 (IC),采用一种新的时间域方法. 集成电路实现了高分辨率和高能效,可精确测量高达10MΩ的电阻.
科学领域:
- 集成电路设计 集成电路设计
- 传感器接口 传感器接口
- 混合信号系统 混合信号系统
背景情况:
- 电阻传感器在各种应用中至关重要,但它们的接口电路往往在分辨率和功耗方面面临限制.
- 准确有效地将模拟传感器信号转换为数字值对于现代电子系统至关重要.
研究的目的:
- 介绍一款全新的72通道电阻传感器接口集成电路 (IC),旨在实现高分辨率和能源效率.
- 展示一个时间域信号处理技术,用于直接的电阻到时间的转换.
- 为了实现广泛的测量范围和每通道的低功耗.
主要方法:
- 开发了一个具有8个传感器振荡器 (S-OSC) 单元和参考时钟发生器的IC.
- 利用时间域信号处理,将传感器电阻值转换为脉冲宽度.
- 用频率分割器和时间到数字转换器 (TDC) 进行数字转换的员工过量采样.
- 集成了一个相锁循环 (PLL),用于节能TDC运行.
主要成果:
- 在每通道310 pJ的有效位数 (ENOB) 为9.3位,最大可实现的ENOB为14.1位.
- 通过时间域接口方法将测量能力扩展到10 MΩ.
- 该IC采用180nmCMOS工艺制造,每通道消耗15.07μW.
- 每个转换步骤达到0.48 pJ的沃尔登功率 (FoM) 和159.8dB的施瑞尔功率 (FoM).
结论:
- 拟议的时间域接口IC为电阻传感器测量提供了高效和高分辨率的解决方案.
- 该设计表明,与传感器振荡器的内在信号噪声比率 (SNR) 相比,信号与量子化噪声比率 (SQNR) 的性能优越.
- 可调节的分割比 (N) 允许灵活调整ENOB,以满足各种应用需求.
更多相关视频
06:33Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation
Published on: January 5, 2014
11.7K
07:43A Simple Approach to Perform TEER Measurements Using a Self-Made Volt-Amperemeter with Programmable Output Frequency
Published on: October 5, 2019
21.6K
相关概念视频
Design Example: Capacitance Multiplier Circuit
636
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
636
Design Example: Resistive Touchscreen
254
A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
254
Resistivity
3.3K
When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
3.3K
