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Pole/zero placement design

The Pole-Zero Placement Option allows you to interactively place and move poles and zeros on the z-plane. To do so, you can enter complex value coordinates to specifyexact values or click on a graph of the complex half plane to move or place them with the mouse. The magnitude response of theresulting filter updates immediately as you place or move poles / zeros.

Digital filter design utility

The Pole-Zero Placement Filter Design Interface

Zeroes

  • Real: Specifies the real part value if coordinates are rectangular, or the radius value if coordinates are polar.
  • Imag: Specifies the imaginary part value if coordinates are rectangular, or the angle value if coordinates are polar.
  • Is Real?: Makes the specified pole or zero point real if you place a checkmark in the checkbox.
  • Is Linear Phase Pair?: Makes the specified pole or zero a linear phase pair if you place a checkmark in the checkbox.
  • On Unit Circle?: Places the pole or zero point on the unit circle if you place a checkmark in the checkbox.
  • Order: Specifies the order of the pole or zero.

Poles

  • Specifies the properties for each pole in the filter. Contains the following options:
  • Real: Specifies the real part value if coordinates are rectangular, or the radius value if coordinates are polar.
  • Imag: Specifies the imaginary part value if coordinates are rectangular, or the angle value if coordinates are polar.
  • Is Real?: Makes the specified pole or zero point real if you place a checkmark in the checkbox.
  • Is Linear Phase Pair?: Makes the specified pole or zero a linear phase pair if you place a checkmark in the checkbox.
  • On Unit Circle?: Places the pole or zero point on the unit circle if you place a checkmark in the checkbox.
  • Order: Specifies the order of the pole or zero.

Filter settings

  • Gain: Sets the gain of the filter manually. You can use this control only if you remove the checkmark from the Normalized Gaincheckbox.
  • Normalized Gain: Specifies whether the VI automatically adjusts the gain of the filter. The default contains a checkmark inthe checkbox, in which the VI adjusts the gain so the maximum response is 1.0 (0 dB). Remove the checkmark from the checkbox toadjust the gain manually with the Gain control.
  • fs [Hz]: Specifies the sampling frequency in hertz. The input must contain a value greater than zero.
  • Coordinates: Specifies whether the VI displays poles and zeroes in rectangular or polar coordinates. The default isrectangular coordinates.
  • Load Filter from File: Opens a file dialog you can use to select a file of a filter that loads into the Express VI.
  • Zero: Specifies the color of the zeroes in the Z Plane plot. The default is blue. Click the color box next to the parameter nameto select a different color.
  • Pole: Specifies the color of the poles in the Z Plane plot. The default is red. Click the color box next to the parameter nameto select a different color.
  • Delete selected: Deletes the selected pole or zero from the filter.
  • Add Zero: Adds a zero to the filter.
  • Add Pole: Adds a pole to the filter.
  • Z Plane: Plots the number and location of poles and zeroes.
  • Magnitude: Plots the filter magnitude response.
  • Magnitude in dB: Specifies whether the VI uses decibels or a linear scale in the magnitude plot. If a checkmark is in thecheckbox, the VI converts linear magnitude response to decibels.

Labview resources

To simplify working in LabVIEW with the filters that you design with the interactive utility on this page, we have posted several utility VIs for LabVIEW that allow you to import and export the designs that you save or load using the "Save Filter Spec" or "Load Filter Spec" buttons from the utility. You can download a zip file containing these utilities here .

What is labview?

LabVIEW is a graphical programming&mathematics environment for designing, prototyping, and deploying systems. TheInteractive Digital Filter Design Utility included on this site was built using LabVIEW 8 and the LabVIEW Digital Filter DesignToolkit.

The LabVIEW Digital Filter Design Toolkit is a software add-on for LabVIEW that facilitates specification,design, analysis, and implementation of digital filters. Without prior knowledge about programming in LabVIEW, you can use theDigital Filter Design Toolkit Express VIs to interact graphically with filter specifications to design digital filters. For more information on the LabVIEW Digital Filter Design toolkit, view the online web event Designing Digital Filters with NI LabVIEW and the Digital Filter Design Toolkit .

The LabVIEW Digital Filter Design Toolkit provides VIs that you can use to design a digital IIR or FIR filter, analyzethe characteristics of the digital filter, change the implementation structure of the digital filter, and process datawith the digital filter. Besides the floating point support, the LabVIEW Digital Filter Design Toolkit provides a set of VIs that you canuse to generate a fixed point digital filter model, analyze the characteristics of the fixed point digital filter, simulate theperformance of the fixed point digital filter, and generate integer C or LabVIEW code for a specific fixed point target. In addition to tools that help you createconventional digital filters, the LabVIEW Digital Filter Design Toolkit includes tools for multirate digital filter design.

Visit ni.com for more information about the LabVIEW Digital Filter Design Toolkit and other NI products and resources.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
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
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
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
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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