低噪音低功率超声波AFE与连续TGC内置在TIA和光束造型器中
IEEE transactions on biomedical circuits and systems
|August 7, 2023
概括
本研究介绍了一种低噪音,高效的模拟前端 (AFE) 容量微加工超声波传感器 (CMUT). 该设计在最低功耗下实现了出色的性能,增强了超声波成像能力.
科学领域:
- 电气工程 电气工程
- 生物医学工程 生物医学工程
- 材料科学 材料科学 材料科学
背景情况:
- 容量微加工超声波传感器 (CMUT) 在超声波应用中至关重要.
- 开发低噪音,高功率的模拟前端 (AFEs) 对于CMUT性能至关重要.
- 现有的AFE经常面临噪音,功耗和获得补偿的挑战.
研究的目的:
- 为容量微加工超声波传感器 (CMUT) 提供一种新的低噪音,高功率效率的模拟前端 (AFE).
- 在AFE中整合一个三阶段的时间增益补偿 (TGC),而不会增加功耗.
- 为了优化噪声性能,并实现广泛的动态范围,以改进超声波信号处理.
主要方法:
- 使用28纳米CMOS技术实现AFE.
- 在跨阻抗放大器 (TIA) 和模拟光束变频器中整合三阶段时间增益补偿 (TGC).
- 利用消除噪声,电容反,电压控制的晶体管阵列,全通路被动网络和具有可变反的总结单元.
主要成果:
- 在5MHz中心频率下达到2.11 pA/√Hz的低输入参考噪声 (IRN).
- 证明了高功率效率,消耗仅为1.02mW/通道.
- 在三个阶段中验证了60dB的总指数时间增益补偿 (TGC) 范围.
结论:
- 拟议的AFE为CMUT应用程序的低噪音和高功率效率设计提供了显著的进步.
- 集成的TGC提供了很大的补偿范围,没有额外的电力成本,提高了系统的灵活性.
- 这种设计为更复杂,更高效的超声波系统铺平了道路.
相关概念视频
Ultrasound II: Endoscopic Ultrasound and FibroScan
139
Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
Endoscopic Ultrasound (EUS):
Endoscopic Ultrasound (EUS):
139
Sampling Continuous Time Signal
278
In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
In the...
In the...
278
Linear Approximation in Time Domain
101
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
101
Cascaded Op Amps
667
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
667
Ultrasonography
4.6K
Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
During an ultrasonography procedure, a handheld device called...
4.6K
MOSFET Amplifiers
186
The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
186


