Which EMC (electromagnetic compatibility) components are helpful for the design and modification of ultrasound diagnostic instruments?

EMC rectification of ultrasound diagnostic instruments should focus on the probe interface, power supply, and digital module. The high-voltage pulse line at the probe interface can be connected in parallel with an SMBJ18CA TVS diode to absorb spikes. To improve the common-mode interference immunity of the multi-channel receiving circuit, CML2012 series common-mode inductors can be used on the differential signal lines of each channel. It is recommended to add a π-type filter composed of a PBZ series power inductor and ceramic capacitor to the output of the switching power supply module of the entire unit. The densely packed communication and video ports on the back of the device are a key area; it is recommended to configure an ESD protection array (e.g., ESD0524P) for each data cable pair. Its low capacitance (<1pF) perfectly matches high-speed interfaces such as USB 3.0 and HDMI, effectively solving the problems of excessive radiated emissions and electrostatic discharge.