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Topic: Filter (band)

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In the News (Wed 22 May 19)

  Bandpass Filter / Band Reject Filter Products - Bandpass filter and band reject filter products
for different ...
The filters are delivered in two basic models: The BPBR-types have the reject range on the high side of the pass frequency and the BRBP-types have the reject range situated on the low side of the pass frequency.
These filters are primarily intended to pass and reject two single frequencies, but the filters can also be tuned to pass and reject several single frequencies or to having a certain pass and reject port bandwidth.
The filter has very small physical dimensions owing to the use of high-Q, temperature compensated helical resonators The housing is made of extruded aluminium, the chassis of passivated steel, and teflon insulation has been applied in the rigid coaxial cables and in the connectors.
www.procom-dk.com /filter/c0201-bandpass-filter   (965 words)

  Applied Dynamic Measurements - Filter
Choosing the most appropriate filter response relates to the desired flatness in the passband, attenuation and damping in the transition band, and linearity of phase characteristic in the stopband.
The final filter design is a matter of extracting the polynomial coefficients from the equation that provides the optimum pole/zero placement and using these coefficients to synthesise the component values for the desired filter topology.
This filter tutorial is not intended as an in depth discussion but instead forms a brief outline of basic filter principles and provides some awareness of points to be understood and considered in the design and selection of electronic filters.
www.admnetworks.com /filters.htm   (1206 words)

 Band-pass filter circuit - Patent 4361894
The illustrated loop filter is suitable for use in achieving the second one of the aforementioned objects of this invention, namely high speed pulling in with bursts of different frequencies; and provides the value.vertline.V.vertline.max by the equation (4) without such limitations as given by the equations (1) and (2).
6 comprises a loop filter 401 operative on a positive voltage and a loop filter 402 operative with a negative voltage and is characterized in that the AFC circuit is controlled by the sum, V.sub.1 +V.sub.2, of the outputs V.sub.1 and V.sub.2 from the two loop filters 401 and 402.
The center frequency of the band-pass filter 907 is controlled so that the output from the phase detector 906 approaches zero, that is, the difference between the input frequency and the center frequency of the pass band approaches zero.
www.freepatentsonline.com /4361894.html   (5513 words)

Filters are electric circuits that selectively pass signals of certain frequencies.
However, the filter cannot be considered as a simple cascading of a high and low pass filter since the second part loads the first part.
Apply a sinusoidal frequency of 1V peak-to-peak to the input of the circuit and measure the amplitude and phase of the output voltage, using the probe of the oscilloscope.
www.seas.upenn.edu /~ese206/labs/Filterlab.html   (1204 words)

 IE5/Mac Band Pass Filter
This filter could, if desired, be used as the inverse of the original Backslash hack — to selectively serve an entire set of rules only to IE5/Mac inline with all other CSS rules, rather than importing a separate style sheet.
More recently, Tantek devised the Mid Pass Filter, and the related IE5.0/Win and IE5.5/Win Band Pass Filters which enable separate CSS files to be served only to respective IE/Win browsers.
The preexistance of the Mid Pass Filter for IE5/Win is what prompted the request for something similar for IE5/Mac.
www.stopdesign.com /examples/ie5mac-bpf   (524 words)

 ECEn 485: FIR Filter Design Basics
The important characteristics of a discrete-time FIR low-pass filter are the pass band, the transition band, the stop band, and stop band attenuation.
for the length of the filter for this exercise.
The pass band is in the frequency range [0, 0.1]; the transition band is the interval [0.1, 0.2]; the stop band is [0.2, 1].
www.ee.byu.edu /class/ee485/simulink/am/filterbasics.html   (628 words)

 band stop filter at Filtronetics, Inc.
Other names for a bandstop filter are band elimination filter, band reject filter, band suppression filter, trap filter, band elimination filter, and notch filter.
Crystal filters with low insertion loss in the pass band are achievable for stopband widths from 0.005% to 0.1% of the center frequency.
Pass bands are restricted to no more than 25% of the center frequency for wideband crystal band stop filter designs.
www.filtro.net /band_stop_filter.html   (770 words)

 band reject filter at Filtronetics, Inc.
Other names for a band reject filter are band elimination filter, band reject filter, band suppression filter, and band reject filter.
The most common is LC band reject filter, or lumped element, which is comprised of inductors and capacitors.
Crystal filters with low insertion loss in the passband are achievable for stopband widths from 0.005% to 0.1% of the center frequency.
www.filtro.net /band_reject_filter.html   (775 words)

 Band-Pass Filters
Because the band-pass filter is actually two independent first-order filters, the phase response of the entire circuit is simply the combination of the phase responses of the two separate sections.
In the case where the two filter sections have the same cutoff frequency, the phase lead from the high-pass section cancels the phase lag from the low-pass section at the cutoff frequency only, so that is the only frequency with no phase shift.
The two filters don't really interact with each other, beyond the fact that the second filter, depending on component values, may act as a load on the first one.
www.play-hookey.com /ac_theory/band_pass_filters.html   (666 words)

 Filters for Astrophotography
These filters are excellent at reducing the sky glow from man-made light pollution, and they are also very beneficial in reducing the glow of ionized oxygen at 538nm and 630nm in the upper atmosphere which contributes to the natural sky glow even at the darkest sites.
These filters pass more than 90 percent of the light from the main spectral lines from emission nebula, such as the predominant hydrogen-alpha line at 656.3nm, the oxygen III line at 501nm, and the hydrogen-beta line at 486nm.
Very narrow band hydrogen-alpha filters with bandpasses under 1 nanometer are used for solar work and typically are used with an energy rejection pre-filter that goes in front of the objective of the scope while the hydrogen-alpha filter goes in the light path between the objective and eyepiece.
www.astropix.com /HTML/I_ASTROP/FILTERS.HTM   (1228 words)

 EMI/RFI Filter Buying Considerations
To filter commercial utility power entering a shielded room, a low-pass filter, such as Genisco’s GFP58201 series, would be used to pass the power line frequencies while rejecting the higher frequencies.
For data and signal line filters, the passband impedance of the load must be specified to insure that the filter is properly matched for data transmission.
The size of a filter may be restricted by the space available in the application and may be further constrained by the dimensions of mounting surfaces that also serve as ground planes.
www.djmelectronics.com /articles/emi-filter-buying-guide.html   (885 words)

 Band-pass filters - Chapter 8: FILTERS - Volume II - AC   (Site not responding. Last check: 2007-10-15)
There are applications where a particular band, or spread, or frequencies need to be filtered from a wider range of mixed signals.
Filter circuits can be designed to accomplish this task by combining the properties of low-pass and high-pass into a single filter.
Band-pass filters can be made by stacking a low-pass filter on the end of a high-pass filter, or visa-versa.
www.allaboutcircuits.com /vol_2/chpt_8/4.html   (564 words)

 The Band
The band picked Steve out of Chicago's underground music scene (which Steve continues to perform in when not in the studio or on tour).
The original touring drummer for the band, Matt won his place in Filter after he broke one of his sticks while playing "Dose" in his audition, yet continued to play his parts (hope you enjoyed that run-on sentence).
Filter tours on Locobazooka throughout the summer to promote the third studio album with new guitarist, Alan Bailey.
filter.seven10.com /filter.html   (1312 words)

 Band Pass Filter - Band Pass - Active Filter - Electronic Circuits   (Site not responding. Last check: 2007-10-15)
This point is.7071 the amplitude of the pass band.
Bandpass Filter (Single OpAmp) : A band pass filter passes a range of frequencies while rejecting frequencies outside the upper and lower limits of the passband.
The range of frequencies to be passed is called the passband and extends from a point below the center frequency to a point above the center frequency where the output voltage falls about 70% of the output voltage at the center frequency.
www.hobbyprojects.com /A/band-pass.html   (347 words)

 Digital Filters by Nuhertz Technologies
Filter Solutions offers 1st, 2nd, and 3rd order compensations that approximate X/Sin(X) and are valid for frequencies up to half the sample rate.
For filters larger than this, or with fewer bits of precision available, the cascade or parallel form may be necessary.
When you have completed your filter study and are ready to generate code for your filter, you must set the Sig Dig box to the desired number of digits (1-16) to display the Z transform in.
www.filter-solutions.com /digital.html   (1562 words)

 Filter Workshop
Because direct access is provided to filter design parameters (coefficients, pole angles and the like) it is possible to design very complex filters, such as those having multiple-slopes, with a minimum of components.
Filter Workshop is perhaps unique in that all of the filter coefficients for each type of filter are shown.
Filter Workshop attempts to provide an environment in which filter networks ranging from basic to fairly complex can be designed with a minimum of effort, while at the same time, providing enough background on the subject where the user can begin to make educated decisions.
ourworld.compuserve.com /homepages/f_ostrander/pfilterw.htm   (1184 words)

 ARRLWeb: RF Filters
An RF filter is an electrical circuit configuration (network) designed to have specific characteristics with respect to the transmission or attenuation of various frequencies that may be applied to it.
Its behavior is the opposite of that of the low-pass filter.
A band-pass filter is one that will transmit a selected band of frequencies with substantially no loss, but that will attenuate all frequencies either higher or lower than the desired band.
www.arrl.org /tis/info/rf-filter.html   (662 words)

 Hydrotex - Filter Band Lining   (Site not responding. Last check: 2007-10-15)
Filter Band linings are similar to Filter Point, providing an effective and highly permeable concrete lining that resists erosive forces.
Filter Band differs from Filter Point in that the form creates interconnected, tubular concrete elements that are separated by large, interwoven filter bands.
Filter Band concrete linings are specified in situations similar to those for which Filter Point might be used, but which also require greater relief of uplift pressures, higher reduction of flow velocities, or greater reduction of wave run up.
www.hydrotex.com /hsfb.html   (136 words)

The job at hand was the follow-up to Filter's platinum-plus 1999 release, Title Of Record, featuring the smash hits "Take A Picture" and "Welcome To The Fold," which itself provided proof that the band's 1995 debut album Short Bus with its provocative single "Hey Man, Nice Shot," was far more than just a fluke.
No question about it: while Filter's high-impact, hardwired sound is as fiercely uncompromising and consistently unpredictable as ever, the energy and intent of The Amalgamut seems to be coming from an entirely different space.
The diversity that Filter celebrates on The Amalgamut is reflected in an astonishing spectrum of sounds that give these tracks a depth and dimension rare in contemporary music.
www.officialfilter.com /band.php   (1045 words)

 Band-stop filter - Wikipedia, the free encyclopedia
In signal processing, a band-stop filter or band-rejection filter is a filter that passes most frequencies unaltered, but attenuates those in a range to very low levels.
It is the opposite of a band-pass filter.
A notch filter is a band-stop filter with a narrow stopband (high Q factor).
en.wikipedia.org /wiki/Band-stop_filter   (238 words)

 Band-reject filter includes compensation - 4/13/2000 - EDN   (Site not responding. Last check: 2007-10-15)
Filter peak rejection occurs at a transmission pole that the shunt resonance of the coupling inductor and the effective capacitance (below resonance) of the series resonator create.
This section is a three-pole lowpass filter with 0.01-dB of passband ripple and a 3-dB cutoff frequency of 47 MHz, which provides supplementary lowpass selectivity superimposed upon the basic band-reject behavior.
The compensated LC band-reject filter (Figure 1) is practical and provides substantial partial correction of filter-response-shape symmetry and can provide additional lowpass filtering.
www.edn.com /article/CA46766.html   (542 words)

 Filter lyrics, Filter guitar tabs, Filter bass tabs, Filter pictures, Filter fonts, discography, biography   (Site not responding. Last check: 2007-10-15)
Band fonts section Filter is another category that deserves some attention, especially for those who are big fans of the band Filter and like to collect or create band logos and such.
Our band font section has quiet a few different fonts for you to download, so you can type any text the way your favorite band writes their on their album cover.
Members will be able to submit and rate Filter tablature and lyrics, add pictures and other information about Filter such as reviews, comments, interesting facts in the history of the band Filter.
musiceffect.com /filter/piano   (960 words)

 Headend/Inside Plant :: RF Filters   (Site not responding. Last check: 2007-10-15)
These filters are available in either wall or rack mount versions for headend, hub site, and utility enclosures, as well as in environmentally sound, power passing outdoor housings that can be strand, pedestal, or wall mounted.
This power passing filter housing is excellent for use in MDUs that require one or more channels to be deleted and reinserted for security camera monitoring or special channel reinsertion through the use of up to two channel deletion filters and two agile or fixed video modulators mounted in the housing.
Filters include lowpass, highpass, wide bandpass, band rejection, or a combination of any two of these.
www.atxnetworks.com /rffilters.html   (1002 words)

 GEPH316 Field Data: Frequency filter design
The filter is defined by an array of frequencies in Hz, at which the filter characteristics change, and the matching array of amplitudes, which are required at those frequencies.
Typically, the amplitudes are 1.0 in the pass band and 0.0 in the stop band.
The taper parts at the edges of the pass band appear to be steeper and made up of short straight line segments, whereas the normal filter tapers appear to be broader and smoother.
www.geo.mtu.edu /~ctyoung/Robinson/FilterFr.htm   (1467 words)

 Acoustic Filters Lab
An acoustic low-pass filter may be constructed by inserting an expansion chamber in the duct.
An acoustic high-pass filter may be constructed simply by inserting a "T" junction, or a short side branch into the duct.
The bandwidth of the filter may be increased by adding some porous absorbing material (steel wool) in the cavity of the resonator.
www.kettering.edu /~drussell/GMI-Acoustics/Filters.html   (2435 words)

 Filter (band) - Wikipedia, the free encyclopedia
Filter is a rock group formed in 1993 by Richard Patrick (former live guitarist for Nine Inch Nails) and guitarist/programmer Brian Liesegang.
Kurt Cobain's suicide was widely rumored to have inspired the song, but the band refuted this.
Former Filter members Brian Liesegang and Matt Walker played guitar and drums (respectively) in Billy Corgan's touring band in 2005 to promote his solo album.
en.wikipedia.org /wiki/Filter_(band)   (986 words)

 54 MHz Lowpass Filter
A transmitter low pass filter design project was started with goals of low insertion loss, broad SWR bandwidth, mechanical simplicity, easy construction, and operation on all HF amateur bands including six-meters.
This filter is useful in reducing harmonic radiation in the VHF and higher frequency bands, and is made at home with low cost commonly available parts.
If you wish to use this filter on the HF amateur bands from 1.8 to 30 MHz only, the adjustable tuning capacitor adjustment is not critical at all, and does not affect HF SWR performance.
www.realhamradio.com /DC_54_mhz_lowpass_filter.htm   (2866 words)

 IE5/Mac Band Pass Filter
This filter could, if desired, be used as the inverse of the original Backslash hack — to selectively serve an entire set of rules only to IE5/Mac inline with all other CSS rules, rather than importing a separate style sheet.
It was created 5 June 2004 (on Douglas Bowman’s request) by Tantek Çelik in less than 5 minutes, armed with the knowledge that escaping the CSS end-comment marker would trick IE5/Mac (and only IE5/Mac) into thinking the comment text continued.
More recently, Tantek devised the Mid Pass Filter, and the related IE5.0/Win and IE5.5/Win Band Pass Filters which enable separate CSS files to be served only to respective IE/Win browsers.
stopdesign.com /examples/ie5mac-bpf   (524 words)

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