High Pass Filters

VoIP technology is equipped with several functions, namely, the signalling function, meaning the VoIP is in charge of receiving the network from the caller, after which the conversation delivered. This technology is capable to pass voice traffic in the form of packets over an IP network. Packets of sound undergo a long process or delay to get to the destination it can damage the voice's quality being heard. It happened because there is continuous delay in the communication between IP phone set on VoIP technology that causes echo in the receiver's voice. Echo can occur during communication with IP phone set with average delay capacity above 5ms. The delay on the delivery and reception as in the results of communication between telephones can be adjusted for sound frequency of 300 Hz to 1000 Hz as a cut off by adding High Pass Filter (HPF) application. HPF filter application is able to stabilize the amplitude of about-21 dBm from the set of transmission test on the receiver when there is weakening at low frequencies, but when the frequency is raised to 1500-2250 Hz the amplitude strengthens to-12,2 dBm or increases the value of about 8.8 dB. Meanwhile, for the lower frequency such as 300-950 Hz, the filter would not pass it since the frequency is designed to be cutoff at 1000 Hz. The value of delay is narrower to 0.08ms by HPF application at the frequency of sound upper limit received by any 1000-3400 Hz telephone set.

This article details a new transfer function approach in passive harmonic filter design for industrial and commercial power system applications. Filter placement along with six common filter configurations are presented. Harmonic impedance, voltage division and current division transfer functions are derived and used in a practical filter design procedure that incorporates IEEE-519 distortion limits directly into the design and component

The performance of a High Pass Filter (HPF) with and without Defected Ground Structure (DGS) was analyzed. The defected ground structure is circular etched shapes in ground plane. Comparison of the response of filter with and without DGS was done separately. Parameters of the proposed configuration were calculated at the centre frequency of 1.5 GHz and with dielectric constant of 4.4, loss tangent of 0.02 and substrate height of 1.6mm. Results were simulated using computer simulation technology software (CST). The undesired sidebands and fluctuations of response were reduced by using defected ground structure (DGS). General Terms-Microwave Filter, High Pass Filter

This experiment is about the study of the characteristics of some common filters. In this experiment, there are three types of filter that had been looked on which are low-pass filter, high-pass filter and band-pass filter. Here the frequency response of each of the filters are being studied to understand the characteristics of their cutoff frequencies and the insertion loss. All the values are being measured and recorded in the following section.

This paper presents an efficient solution for digital images sharpening, the Adaptive Directional Sharpening with Overshoot Control (ADSOC), a method based on a high-pass filter able to perform a stronger sharpening in the detailed zones of the image, preserving the homogeneous regions. The basic objective of this approach is to reduce the undesired effects. The sharpening introduced along strong edges

Various methods proposed for image fusion satellite images are examined from the viewpoint of accuracies with which the color information and spatial context of the original image are reproduced in the fused product image. Image fusion is a useful tool in integrating a high resolution panchromatic image (PI) with a low resolution multispectral image (Mis) to produce a high resolution multispectral image and better understanding of the observed earth surface. In this study, five typical fusion methods of Gram-Schmidt (GS), Ehler, modified intensity-hue-saturation, high pass filter, and wavelet-principal component analysis (PCA) are compared. The spectral quality assessment of the products using these different methods is implemented by image quality metrics. The accuracy of classification result is assessed by means of the support vector machine based on radial basis function kernel. Our analysis indicates that as a whole, the Ehler and wavelet-PCA methods show good performances, followed by GS. Also, the examination of confusion matrix shows that both Ehler and wavelet-PCA yield better accuracies in the classification results.

An insensitive current mode versatile first order filter section with single input and multiple outputs is realized. The realization uses two multi outputs current conveyors, only one grounded resistor and one grounded capacitor. The realized current mode section provides low-pass, high-pass and all-pass responses at different outputs without any component matching constraint. The all-pass section is then cascaded with the

Methods for designing bilinear switched-capacitor (SC) ladder filters are well known. However, they cannot be directly extended to digital filters because of the delay-free loops allowed in SC filters. In the present paper, design methods for low-sensitive bilinearly transformed voltage-current ladder filters are developed. The matrix approach for SC filter design is extended to digital filters, and the delay-free loops

Öz: Bu çalışmada ilk olarak Alharbi, Muthuswamy ile Mutlu ve arkadaşları tarafından literatürde önerilen memristör taklit devrelerinin Multisim programında düşük frekanslarda (5Hz-150Hz) benzetimi yapıldı. Taklit devreleri için farklı frekanslarda akım-gerilim (I-V) eğrileri incelenerek en kararlı çıkış eğrisini veren Mutlu ve arkadaşları tarafından önerilen devre gerçekleştirildi. Bu devre kullanılarak 2. dereceden aktif yüksek geçiren filtre devresi tasarlandı. Memristörlü ve direnç kullanılarak gerçekleştirilen filtre devreleri kalite faktörleri, Bode diyagramları ve kesim frekansları açısından karşılaştırıldı. Memristörlü filtre devresinin 0-10 Hz frekans aralığında direnç kullanılarak gerçekleştirilen filtre devresinden daha iyi süzme işlemi yaptığı görüldü.

In this paper single filter frequency masking FIR filters are dis-cussed. We briefly review the previously proposed lowpass narrow-band filters and propose a design method for highpass narrow-band filters. Wide-band filters are also discussed. The proposed ...

Abstract This document presents the modeling and characterization of novel optical devices based on periodic arrays of multiwalled carbon nanotubes. Vertically aligned carbon nanotubes can be grown in the arrangement of two-dimensional arrays of precisely determined dimensions. Having their dimensions comparable to the wavelength of light makes carbon nanotubes good candidates for utilization in nano-scale optical devices. We report that highly dense periodic arrays of multiwalled carbon nanotubes can be utilized ...