scholarly journals Discrimination of first- and second-order regular intervals from random intervals as a function of high-pass filter cutoff frequency

2005 ◽  
Vol 117 (1) ◽  
pp. 59-62 ◽  
Author(s):  
William A. Yost ◽  
Dan Mapes-Riordan ◽  
Raymond Dye ◽  
Stanley Sheft ◽  
William Shofner
Keyword(s):  
Cutoff Frequency ◽  
Second Order ◽  
Pass Filter ◽  
High Pass Filter ◽  
Random Intervals ◽  
High Pass

scholarly journals Application of Butterworth high pass filter as an approximation of Wood Anderson seismometer frequency response to earthquake signal recording

ACTA IMEKO ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 379
Author(s):  
Hamidatul Husna Matondang ◽  
Endra Joelianto ◽  
Sri Widiyantoro
Keyword(s):  
Frequency Response ◽  
Signal To Noise Ratio ◽  
Cutoff Frequency ◽  
Maximum Amplitude ◽  
Second Order ◽  
Pass Filter ◽  
High Pass Filter ◽  
Local Earthquake ◽  
Seismic Magnitude ◽  
High Pass

The method for generating maximum amplitude and signal to noise ratio values by using second order high pass Butterworth filter on local seismic magnitude scale calculations is proposed. The test data are signals from local earthquake that have been occurred in Sunda Strait on April 8th 2012. Based on the experimental results, a 8 Hz cutoff frequency and a gain of 2200 of second order Butterworth high pass filter as an approach to simulating the frequency response of Wood Anderson seismometer can provide maximum amplitude value, SNR, and the magnitude better than simulated Wood Anderson frequency response.

scholarly journals A Compact High-Pass Filter Using Hybrid Microstrip/Nonuniform CPW with Dual-Mode Resonant Response

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Hui Chen ◽  
Di Jiang ◽  
Ke-Song Chen ◽  
Hong-Fei Zhao
Keyword(s):  
Printed Circuit Board ◽  
Coplanar Waveguide ◽  
Cutoff Frequency ◽  
Circuit Board ◽  
Dual Mode ◽  
Pass Filter ◽  
High Pass Filter ◽  
Mode Characteristic ◽  
High Pass ◽  
Good Agreement

A novel and miniature high-pass filter (HPF) based on a hybrid-coupled microstrip/nonuniform coplanar waveguide (CPW) resonator is proposed in this article, in which the designed CPW has exhibited a wideband dual-mode characteristic within the desired high-pass frequency range. The implemented filter consists of the top microstrip coupled patches and the bottom modified nonuniformly short-circuited CPW resonator. Simulated results from the electromagnetic (EM) analysis software and measured results from a vector network analyzer (VNA) show a good agreement. A designed and fabricated prototype filter having a 3 dB cutoff frequency (fc) of 5.78 GHz has shown an ultrawide high-pass behavior, which exhibits the highest passband frequency exceeding 4.0fcunder the minimum insertion loss (IL) 0.75 dB. The printed circuit board (PCB) area of the filter is approximately0.062λg×0.093λg, whereλgis the guided wavelength atfc.

Research on Harmonic Suppression and Power Compensation of Aluminum Electrolytic Rectifier

2010 ◽  
Vol 159 ◽  
pp. 258-263
Author(s):  
Hong Ju Lin
Keyword(s):  
Power System ◽  
Power Factor ◽  
Reactive Power ◽  
Second Order ◽  
Computation Method ◽  
Harmonic Suppression ◽  
Pass Filter ◽  
High Pass Filter ◽  
Power Rate ◽  
High Pass

According to analyze damage of current aluminum electrolytic rectifier, one second order high pass filter was presented, which can complete harmonic suppression and power compensation. At the same time, principle and parameters computation method of it were given in the paper. Experiment results proved, it could reduce harmonic currents and increase power factor effectively if the according methods were used to design filter, it is obvious economic effects and good application prospects in the aluminum electrolytic enterprises. With the current power system harmonic pollution becoming serious, its damage is given great concern by the electrical profession. The aluminum electrolytic rectifier is great harmonic source in power system, which output currents to it, and which bright large sum of extra power rate to enterprises according to current power rate metering method[1].Furthermore, it can reduce rectifier units power factor. Accordingly, it is necessary to complete harmonic suppression and reactive power compensation for power system supplying good quality electrical energy. The given company 160KA aluminum electrolytic rectifier was presented for the experiment object in our country in the paper. According to analyzing its structure and parameters, one design method of second order high pass filter was given, which could complete harmonic suppression and power compensation. After the filter was used, it not only could suppress harmonic current, but also could increase power factor to reasonable level so as to reach anticipation effects.

Analog and Digital Filtering of the Brain Stem Auditory Evoked Response

1989 ◽  
Vol 98 (7) ◽  
pp. 508-514 ◽  
Author(s):  
Kevin T. Kavanagh ◽  
Renaee Franks
Keyword(s):  
Phase Shift ◽  
Wave Amplitude ◽  
Cutoff Frequency ◽  
Evoked Response ◽  
Auditory Evoked Potential ◽  
Pass Filter ◽  
Auditory Evoked Response ◽  
High Pass Filter ◽  
High Pass ◽  
Zero Phase

This study compared the filtering effects on the auditory evoked potential of zero and standard phase shift digital filters (the former was a mathematical approximation of a standard Butterworth filter). Conventional filters were found to decrease the height of the evoked response in the majority of waveforms compared to zero phase shift filters. a 36-dB/octave zero phase shift high pass filter with a cutoff frequency of 100 Hz produced a 16% reduction in wave amplitude compared to the unfiltered control. a 36-dB/octave, 100-Hz standard phase shift high pass filter produced a 41% reduction, and a 12-dB/octave, 150-Hz standard phase shift high pass filter produced a 38% reduction in wave amplitude compared to the unfiltered control. a decrease in the mean along with an increase in the variability of wave IV/V latency was also noted with conventional compared to zero phase shift filters. The increase in the variability of the latency measurement was due to the difficulty in waveform identification caused by the phase shift distortion of the conventional filter along with the variable decrease in wave latency caused by phase shifting responses with different spectral content. Our results indicated that a zero phase shift high pass filter of 100 Hz was the most desirable filter studied for the mitigation of spontaneous brain activity and random muscle artifact.

Ultra-low-loss high-pass filter with air-core short-circuit coaxial cable

2017 ◽  
Vol 9 (9) ◽  
pp. 1817-1820 ◽  
Author(s):  
Hongfei Liu ◽  
Sander Weinreb
Keyword(s):  
Short Circuit ◽  
Cutoff Frequency ◽  
Noise Temperature ◽  
Coaxial Cable ◽  
Low Loss ◽  
Pass Filter ◽  
High Pass Filter ◽  
Air Core ◽  
Filter Noise ◽  
High Pass

This paper presents a novel ultra-low-loss high-pass filter with 3 dB cutoff frequency of 890 MHz for astronomical receiver radio frequency interference mitigation application. The filter consists of three series capacitors, four shunt inductors, and microstrip circuit board. Specially, 4 shunt inductors are actualized by fabricating air-core short-circuit coaxial cable inductors in the filter box body, and the quality factor of these cable inductors is up to 762.2 and 1046, respectively, at 1.4 GHz. In the expected passband of 1.1–1.9 GHz, S parameters measurement show that insertion loss is lower than 0.16 dB and two-port return loss is larger than 20 dB; noise measurement show that filter noise temperature is lower than 8 at 300 K ambient temperature. Noise sources of this filter are analyzed by simulation and measurement.

A V-Band Two Pole High-Pass Filter for Frequency Quadrupler Design

2016 ◽  
Vol 6 (1) ◽  
pp. 56
Author(s):  
Maryam Abata ◽  
Mahmoud Mehdi ◽  
Said Mazer ◽  
Moulhime El Bekkali ◽  
Catherine Algani
Keyword(s):  
Pass Filter ◽  
High Pass Filter ◽  
V Band ◽  
High Pass

A New Stripline High Pass Filter Layout

2000 ◽  
Vol 14 (3) ◽  
pp. 423-439 ◽  
Author(s):  
F. Bilotti ◽  
L. Vegni ◽  
A. Toscano
Keyword(s):  
Pass Filter ◽  
High Pass Filter ◽  
High Pass
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