DESIGN OF AN ULTRA-WIDEBAND BAND-PASSFILTER CIRCUIT FOR ELECTROMAGNETIC ULTRASONIC SIGNAL CONDITION
This paper presents a new filtering method for the electromagnetic acoustic signal detection.An ultra-wideband band-pass filter circuit is designed based on the filtering approach of the band-pass filter circuit, which is composed of several second-order infinite gain multiple feedback band-pass filters in parallel.The bandwidth of the new filter can be adjusted by increasing or decreasing the number of filters and the fluctuations in the pass-band can also be modified by changing the center frequency of adjacent filters in parallel.Results of simulation and experiments show that the circuit proposed in this paper does have a wide pass-band and signals within the pass-band can be filtered effectively.
EMAT Ultra-wideband band-pass filter Signal processing Amplitude-frequency characteristic
Tian-xiang HU Ying-hong ZHANG Xiao WEI Zheng-hua QIAN
State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
国际会议
哈尔滨
英文
151-155
2019-01-11(万方平台首次上网日期,不代表论文的发表时间)