2013•Modern Electronics TechniqueRequires access
Ant-aliasing design for ultrasonic echo detection
Xizhong Shen
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Abstract
The aliasing produced by discrete waveform sampling is one of the main problems in the ultrasound detection,is easy to be ignored and causes a wrong result by improper detection.A method of anti-aliasing hardware design is proposed to eliminate the aliasing phenomenon appearing in the ultrasound echo signal processing.The ultrasound echo signal is converted to differential signal in the design,and the differential signal is filtered through the narrow-band interface.The differential signal is entered into AD9233 to achieve the oversampling.Simulation results show that the design can improve the phenomenon of sig nal aliasing effectively.