Protection circuits for ultrasound applications
Protection circuits for ultrasound applications
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DOI：
10.1109/tuffc.2008.769
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发表时间：
2008-05-01
影响因子：
3.6
通讯作者：
Fritsch, Carlos
中科院分区：
文献类型：
--
作者：
Camacho, Jorge;Fritsch, Carlos
描述了一种用于超声脉冲回波应用的简单输入保护电路。其性能是根据其他广泛使用的安排进行分析的。除了在换能器激励期间显示高阻抗以及在接收时显示到放大器的低阻抗路径的主要功能之外，还解决了谐波失真、插入损耗、带宽、功耗、瞬态响应和噪声的问题。结果表明，所提出的电路具有许多优点，无需任何控制信号或偏置电压即可运行。它体积小，可以被认为是一种很好的通用保护电路替代方案。
A simple input protection circuit for ultrasound pulse-echo applications is described. Its performance is analyzed with regard to other widely used arrangements. Besides the primary function of showing high impedance during the transducer excitation time and a low impedance path to the amplifier in reception, issues of harmonic distortion, insertion losses, bandwidth, power dissipation, transient response, and noise are addressed. It is shown that the proposed circuit has many advantages, operating without any control signals or bias voltages. It is small and can be considered a good general-purpose protection circuit alternative.