Low-pass filters for electromagnetic flowmeters

Ah, Goodman

doi:10.1007/bf02474286

Cited by 2 publications

(1 citation statement)

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“…As is shown in the above two time-domain waveforms, very little distortion or noise interference can be found in the 150KHz output waveform while serious distortion and much more high frequency interference exist in the 15MHz output waveform. Therefore, the design of the low-pass filter is of vital importance to the signal generator based on DDS to improve the output signal's quality [8][9].…”

Section: Design Of the Broadband Standard Signal Generatormentioning

confidence: 99%

Design of the Broadband Standard Signal Generator for Laser Locating System of the Mine Hoisting Container

Fan

Gao

Zhao

2013

AMM

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As the key junction between the ground and underground, hoisting systems as well as mines themselves are of vital importance to coalmine production. Laser ranging method is studied as a new solution of getting the real-time position directly. Furthermore, multi-scale phase based laser ranging principles are utilized in the system. The paper is aimed to conduct research into the problems existing in standard signal generating while using laser to locating the hoisting container, and to design standard sine generator circuits with DDS technology and DDS devices AD9850 to generate multiple frequency standard signals. In view of the serious noise disturbance in high frequency output, 4-order Chebyshev low-pass filter is designed, by using the integrated analog filters LT 6600-15, to filter the sine signals from AD9850 and to effectively weaken the noise disturbance. The established practical circuits are tested, obtaining trillion level high frequency and low frequency sine signals and fulfilling the requirements for the location system of hoisting containers.

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Section: Design Of the Broadband Standard Signal Generatormentioning

confidence: 99%