Abstract
In order to extract the multi-frequency weak logging signal at μ V level from the strong background noise, a multi-frequency and multi-channel weak signal data acquisition system based on digital signal processor(DSP) and field programmable gate array(FPGA) is presented. The system took Analog Device's Digital Signal Processor ADSP21992 as a core and Actel's FPGA as a interface chip and realized the real-time acquisition of the multi-frequency and multi-channel weak signal by designing the low-noise pre-amplifier and filer circuits, the analog to digital circuits and the peripheral interface circuits communicating via control area network(CAN) bus. Experimental results show the system can well extract the multi-frequency weak signal about 4 μ V from the strong background noise as well as ensure the high-speed synchronous sample of wide band signal, raising sample efficiency and data reliability.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
