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Getting started

To start a design, you first choose from one of the two available interactive design tools by making a selectionfrom the tree control on the left side of the interface. Select Classical Design to design a filter based on specifications such aspassband / stopband edge frequencies, passband ripple, and stopband attenuation. Select Pole-Zero Placement to design a filter byspecifying the locations of poles and zeros on the complex plane.

The following sections detail how to work with each alternative.

Classical filter design

This tool allows you to design multiple digital filter types by adjusting the filter specifications manually orby interactively changing the passband and stopband cursors in the magnitude vs. frequency graph. As the cursors move, the pole/zero plot and the text based interface change dynamically toset the values for the desired filter.

Digital filter design utility

The Classical Filter Design Interface

Classical filter parameter descriptions

  • Filter Type: Specifies the type of filter you want. The default is a lowpass filter type. You also can select a highpass,bandpass, or bandstop filter type.

Filter specification

  • Sampling Frequency [Hz]: Specifies the sampling frequency ofthe filter in hertz
  • Passband Edge Frequency [Hz]: Specifies the first passband edge frequency of the filter in hertz.
  • Passband Edge Frequency [Hz]: Specifies the second passband edge frequency of the filter in hertz. This option does not appearfor lowpass or highpass filters.
  • Passband Ripple: Specifies the passband ripple of the filter in units determined by the Magnitude in dB option.
  • Stopband Edge Frequency [Hz]: Specifies the first stopband edge frequency of the filter in hertz.
  • Stopband Edge Frequency [Hz]: Specifies the second stopband edge frequency of the filter in hertz. This option does not appearfor lowpass or highpass filters.
  • Stopband Attenuation: Specifies the stopband attenuation of the filter in units determined by the Magnitude in dBoption.
  • Design Method: Specifies the method of filter design. The default is Elliptic. You also can select Butterworth, Chebyshev,Inverse Chebyshev, Kaiser Window, Dolph Chebyshev Window, and Equi Ripple FIR filter designs. Elliptic, Butterworth, Chebyshev, andInverse Chebyshev designs are IIR filter designs. Kaiser Window, Dolph Chebyshev Window, and Equi Ripple FIR designs are FIR filterdesigns.

Design feedback

  • Filter Order: Returns the order of the designed filter. For FIR filters, order +1 equals the number of coefficients or filtertaps.
  • Error Message: Contains details about errors that occur during filter creation.
  • Magnitude in dB: Specifies whether the VI uses decibels or a linear scale to express the magnitude response and for entry of the Passband and Stopband Attenuation input parameters. If checked, the VI converts linear magnitude response to decibels.
  • Passband: Specifies the color of the lines in the magnitude plot that represent the passband response and the passbandfrequencies. The default is blue. Click the color box next to the parameter name to select a different color.
  • Stopband: Specifies the color of the lines in the magnitude plot that represent the stopband attenuation and the stopbandfrequencies. The default is red. Click the color box next to the parameter name to select a different color.
  • Magnitude: Contains the plot of the magnitude response. You can drag the cursors in the plot to change the specifications. Thecolor you specify in passband represents the passband response and the passband frequencies. The color you specify in stopbandrepresents the stopband attenuation and the stopband frequencies. The green vertical line in the graph represents the half samplingfrequency, also known as the Nyquist frequency.
  • Z Plane: Contains the plot of the zeroes and poles of the filter in the Z plane.

Questions & Answers

Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Fundamentals of digital signal processing lab. OpenStax CNX. Jan 03, 2006 Download for free at http://cnx.org/content/col10303/1.5
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