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https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/711628/faq-afe5809-to-support-sonar-applications-what-are-the-modifications-to-be-done-in-afe5809-from-the-standard-ultrasound-setup
LNA 的直流失调电压校正电路由一个由 CBYPASS 设定的转角频率的 HPF 组成，该频率必须更改为1uF，以防止信号<100kHz 时的输入信号衰减。
http://e2e.ti.com/support/applications/medical/f/30/t/549672
http://www.ti.com/lit/ug/tidu702/tidu702.pdf
