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借助芯片技术实现噪声、功率定制 - China Medical Device Manufacturer
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Wed, January 17th, 2018

2009年1月CMDM电子快讯 » 技术新知
借助芯片技术实现噪声、功率定制

这两款超声接收器可根据任何特定成像模式、探头或功率要求进行定制。

在近期改进产品线,使电子元件体积更小、效率更高的基础上,Analog Devices Inc.公司 (ADI; 美国麻州,Norwood;
www.analog.com/zh)又将注意力扩展到如何改进部件灵活性上。该公司的两款八通道超声接收器使设计人员能够自行定制噪声和功率性能,以便适合不同的应用要求。

2007年,ADI公司推出了AD9271型产品,这是一款通用型超声产品,它将八通道超声接收器整合到一块芯片上。据该公司介绍,这一技术取代了其他竞争对手的分体式解决方案。以该技术为基础,ADI 公司又开发了适用于中高端车载式超声设备的AD9272和适用于便携式设备的AD9273型产品。每条通道均配有低噪声放大器、变增益放大器、抗混叠滤波器(AAF)和12位模数转换器(ADC)。AD9272具有上佳的成像品质,适合大型超声设备,而AD9273则具有便携式设备所需的高功率效率。ADI使AD9272和AD9273的噪声和功率特性能够根据任何特定成像模式、探头或功率要求自行定制,进一步增大了器械设计人员的选择范围。

由于车载式和便携式超声设备可用于诸如心脏科、妇产科等不同科室的各种治疗过程中,ADI公司为这些产品配备了串行端口接口(SPI),用户可以根据不同用途对芯片进行优化。通过更改SPI寄存器,器械设计人员可根据设备的应用情况定制超声信号处理架构,使其具有最适当的噪声性能或电池寿命。

“用户可根据具体的应用和需求,自行权衡功耗和动态范围,调整图像品质,”高速信号处理产品部门业务开发主管Steve Hinderliter说道。这种配置软件不仅仅是一种数学工具,它以真实数据为基础,适用于各种不同的成像和超声应用。

通过拓展功能、简化使用方法,这些定制特性可提升芯片性能,超越竞争对手,Hinderliter介绍说。例如,AD9272允许用户根据不同的客户需求更换探头,调整增益,而固定输入式芯片更换不同探头时需要进行衰减,因此会增大噪声。


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