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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

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s. Reply
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are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
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That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
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Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
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s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
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Do you know which machine is used to that process?
s.
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for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
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On having this app for quite a bit time, Haven't realised there's a chat room in it.
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Damian Reply
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Cied
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abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
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AMJAD
preparation of nanomaterial
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Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
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In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
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after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
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name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
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silver nanoparticles could handle the job?
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I'm interested in Nanotube
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this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
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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