Oscillation-test methodology for low-cost testing of active analog filters

1999 ◽  
Vol 48 (4) ◽  
pp. 798-806 ◽  
Author(s):  
K. Arabi ◽  
B. Kaminska
Keyword(s):  
Low Cost ◽  
Analog Filters ◽  
Active Analog ◽  
Test Methodology ◽  
Oscillation Test

Preparation and Characterization of Lithium Orthosilicate Ceramic Pebbles by Melt Spraying Method

2016 ◽  
Vol 697 ◽  
pp. 818-821 ◽  
Author(s):  
You Wen Zhai ◽  
Jin Hu ◽  
Xiao Qin Zhu ◽  
Kai Jun Wang ◽  
Wei Jun Zhang
Keyword(s):  
Phase Composition ◽  
High Performance ◽  
Low Cost ◽  
Test Analysis ◽  
Crushing Strength ◽  
Test Methodology ◽  
The Mean ◽  
Lithium Orthosilicate ◽  
Spraying Method

This paper studied the experimental procedures,, test equipment and test methodology of the melt spraying method. Meanwhile, according to performance index of lithium orthosilicate (Li4SiO4) ceramic pebbles to optimize the melt spraying method. Test analysis of the diameter of orthosilicate pebbles, degree of spheroid of orthosilicate pebbles, surface topography of orthosilicate pebbles, metallographic structure of orthosilicate pebbles, section morphology, crushing strength and phase composition. Results in this work indicate that the lithium orthosilicate (Li4SiO4) ceramic pebbles with a flat or even surface，porous internals, diameter of orthosilicate pebbles between 0.9~1.1mm,density of orthosilicate pebbles more than 90%T.D., the mean crushing strength is 25N, the degree of roundness is 1.027 can be obtained by the optimized melt spraying method. The optimization process provides a basis for obtaining the low cost and high performance of the lithium orthosilicate (Li4SiO4) ceramic pebbles.

Enhancing design-for-test for active analog filters by using CLP(ℜ)

1993 ◽  
Vol 4 (3) ◽  
pp. 215-229 ◽  
Author(s):  
Franc Novak ◽  
Igor MozetiČ ◽  
Marina Santo-Zarnik ◽  
Anton Biasizzo
Keyword(s):  
Analog Filters ◽  
Design For Test ◽  
Active Analog

Low-Frequency and Low-Cost Test Methodology for Integrated RF Substrates

2010 ◽  
Vol 33 (3) ◽  
pp. 669-680 ◽  
Author(s):  
Abhilash Goyal ◽  
Madhavan Swaminathan ◽  
Abhijit Chatterjee
Keyword(s):  
Low Cost ◽  
Low Frequency ◽  
Test Methodology

scholarly journals Development of A Low-Cost Arduino-Based 12-Lead Ecg Acquisition System And Accompanied Labview Application

2019 ◽  
Vol 9 (1) ◽  
pp. 1641-1648
Keyword(s):  
Signal Processing ◽  
Real Time ◽  
Low Cost ◽  
Numerical Data ◽  
Digital Signal ◽  
Acquisition System ◽  
Signal Acquisition ◽  
Frequency Noise ◽  
Ecg Signal ◽  
Active Analog

In this paper, the design of a real-time digital multi--channel ECG signal acquisition system is presented. With the purpose of fabrication towards a simple, compact and low-cost tool for bioelectrical signal processing laboratories, the system is developed to acquire the 12 leads EGC signals and converted to numerical data based on an Arduino module named as Leonardo equipped 12 channels ADC. To observe the EGC waves, the ECG signals are amplified through designed amplifiers with the gain of 60 dB. To reduce the effects from the DC component as well as the baseline wandering and the high frequency noise, the active analog bandpass filter ranged in 0,05 Hz to 100 Hz was designed. The power line noise of 50 Hz also decreased with an active analog bandstop filter with attenuation -38 dB. Under the PC application was built using Labview programing, the low-cost digital ECG signal acquisition system was demonstrated with the requirement of observation in real-time. To clarify the small wave in the digital EGG signal, the limitation of the analog signal processing is improved through the digital filters parameterized in the software to increase the SNR from 1.4 dB to 27.6 dB. Practically, the system is evaluated through a series of experiments on a volunteer person resulting the ECG data is recorded and stored in a TDMS file. Since the system is designed as opened-system, a series of developments towards various applications in biomedical diagnosis based on digital signal analysis techniques is promised to be feasible in the near future.

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