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Topic: Comparator


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In the News (Sat 25 May 19)

  
  Analog Devices: Analog Dialogue: Curing Comparator Instability with Hysteresis
Comparator ICs are designed to compare the voltages that appear at their inputs and to output a voltage representing the sign of the net difference between them.
Comparators often have a latch that permits strobing the input at the right time and a shutdown function that conserves power when the comparator is not needed.
If the reference voltage is midway between the comparator's high and low output voltages (as is the case with a symmetrical power supply and ground reference), the introduction of the hysteresis will move the high and low thresholds equal distances from the reference.
www.analog.com /library/analogDialogue/archives/34-07/comparators   (1514 words)

  
 Comparator - Wikipedia, the free encyclopedia
In electronics, a comparator is a device which compares two voltages or currents and switches its output to indicate which is larger.
A dedicated voltage comparator will generally be faster than a general-purpose op-amp pressed into service as a comparator.
When comparing a noisy signal to a threshold, the comparator may switch rapidly from state to state as the signal crosses the threshold.
en.wikipedia.org /wiki/Comparator   (503 words)

  
 comparator
comparator uses a grotty heuristic for figuring out which files in a tree are eligible to be compared.
Setting this to a slightly larger number than the comparator shred size is a useful way to filter out spurious matches; thus, while comparator defaults to a shred size of 3, filterator defaults to a minimum size of 5.
comparator does not attempt to do semantic analysis and catch relatively trivial changes like renaming of variables, etc. This is because comparator is designed not as a tool to detect plagiarism of ideas (the subject of patent law), but as a tool to detect copying of the expression of ideas (the subject of copyright law).
www.catb.org /~esr/comparator/comparator.html   (1543 words)

  
 Comparator/DAC Combinations Solve Data-Acquisition Problems - Maxim/Dallas
One case should be mentioned: If the value must be compared against several setpoints, such as a low and high warning level and a low and high shutdown level, an ADC may be preferable to the four DACs and four comparators otherwise required.
If the comparator to be used has internal hysteresis that cannot be disabled, you can eliminate any negative effect by ensuring that the DAC output always approaches the comparator threshold from the same direction.
Transient voltages couple directly to the comparators, but the input to the sag and surge comparators is first rectified and filtered to obtain the average value of line voltage.
www.maxim-ic.com /appnotes.cfm/appnote_number/647   (3052 words)

  
 Bullet Comparator - measure bullet ogive   (Site not responding. Last check: 2007-11-06)
Our Bullet Comparator solves that problem by measuring your rounds from a reliable surface on the bullet – the ogive – to provide consistent, precise measurements of your rounds.
The Bullet Comparator is also used by many shooters to check uniformity of bullets – from base to ogive – which is critical to accuracy.
Our Bullet Comparator easily attaches to the blade of your caliper with a thumbscrew and uses interchangeable insert bushings to measure from the bullet ogive.
www.stoneypoint.com /comparator_index.html   (229 words)

  
 Interdesigner.com: Comparator Fast - File Comparator
This way, the File Comparator window will expect you to drag and drop the files to compare, specify each file (source and target) manually or browse for source/target file.
When this option is enabled (checked), the first difference found on compared files, will be with a small dump of data.
Please note that you may open several File Comparator windows (until limit is reached), and each File Comparator window will save their own "history" of compared files, window's size and position.
www.interdesigner.com /ComparatorFast/FileComparator.htm   (566 words)

  
 Java 2 Platform SE v1.3.1: Interface Comparator
Comparators can be passed to a sort method (such as
Caution should be exercised when using a comparator capable of imposing an ordering inconsistent with equals to order a sorted set (or sorted map).
Returns a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.
java.sun.com /j2se/1.3/docs/api/java/util/Comparator.html   (551 words)

  
 Robot Room - Analog Light Sensor Comparator   (Site not responding. Last check: 2007-11-06)
Comparators constantly compare pairs of voltages and provide a digital indication ('1' or '0') of which voltage is higher.
Only half the comparator inputs were used since this example compares the phototransistor (U1) to one potentiometer (R1) and also compares the phototransistor (U1) to the other potentiometer (R2).
In this application, the capacitor doesn't prevent the comparator from oscillating due to noise when the inputs are nearly identical.
www.robotroom.com /Comparator.html   (1183 words)

  
 Voltage comparator - Chapter 6: ANALOG INTEGRATED CIRCUITS - Volume VI - Experiments   (Site not responding. Last check: 2007-11-06)
A comparator circuit compares two voltage signals and determines which one is greater.
This behavior is much easier understood by experimenting with a comparator circuit than it is by reading someone's verbal description of it.
Comparator circuits are widely used to compare physical measurements, provided those physical variables can be translated into voltage signals.
www.allaboutcircuits.com /vol_6/chpt_6/2.html   (452 words)

  
 Document Comparator - Semantic solution that is designed to compare text files
It doesn’t matter which kinds of words were used in the documents, as Document Comparator is designed to precisely analyze and compare the meaning of any document in a manner that closely reflects human processing.
Document Comparator can be delivered in the form of ready-out-of-the-box solutions, or in the form of SDK, so as to be integrated into your document/knowledge management system.
Document Comparator is based upon the Intellexer™ linguistic platform and belongs to a range of semantic solutions that are provided to analyze the meaning of the textual information.
comparator.intellexer.com   (284 words)

  
 Comparator
It is also recommended that the comparator be consistent with equals, although this is not a strict requirement.
In general, Comparators should be Serializable, because when they are passed to Serializable data structures such as SortedMap or SortedSet, the entire data structure will only serialize correctly if the comparator is Serializable.
Although it is permissible for a comparator to provide an order inconsistent with equals, that should be documented.
www.docjar.com /docs/api/java/util/Comparator.html   (378 words)

  
 Welcome to Aquatic Life Ltd - Trusted Environmental Solutions: Comparator Kits
The Palintest Comparator with interchangeable colour discs is so simple to use - just add the tablet reagent to the test sample, place in the comparator and match against the appropriate disc.
Discs are produced by the latest technology which enables the colors to be printed from a palette of over two million different shades - ensuring a perfect match against the colours produced in each test.
The Comparator and Discs are available in complete test kit form or separately for use with existing equipment.
www.aquaticlife.ca /~Products.asp?category=-263771493   (589 words)

  
 J&L Metrology Optical Comparator Terms
When the Axiscope is installed in the Comparator in place of the projection lens, its optical axis occupies the same position as that of the projection lens.
Cross hair rectile lines on the axis of the Axiscope may be focused at any point within the Comparator and represent the location of the optical axis at that point.
Caused by misalignment of the optical elements of the Comparator.
www.jlmetrology.com /optical_comparator_terms.htm   (810 words)

  
 Comparator - Overview
Compare a given set of stocks, based on objective, fact-based factors.
But comparing the financials and price movements of multiple stocks is not easy, because one stock may be superior to another based on one factor (e.g, P/E), but inferior in another (e.g, Yield).
These indicate whether the stock is relatively expensive compared to other stocks and the market.
www.stock-comparator.com /fimeth.php3   (2292 words)

  
 Data Structures in Java: Part 14, The Comparator Interface, Part 6
If you compare this with the previous output, you will see that the locations of the elements in the list are reversed.
The Comparator object returned by the reverseOrder method can be used to impose a reverse natural order on any collection of objects that implement the Comparable interface.
In this case, a reference to a Comparator object was returned by the invocation of the reverseOrder method of the Collections class, and that reference was passed as a parameter to the sort method.
www.developer.com /java/article.php/879601   (2060 words)

  
 SX Embedded Controller Analog Comparator module   (Site not responding. Last check: 2007-11-06)
Ports RB1 and RB2 are the comparator negative and positive inputs, respectively, while Port RB0 serves as the comparator output pin.
The CMP_B register is used to enable the comparator, to read the output of the comparator internally, and to enable the output of the comparator to the comparator output pin.
If both inputs of the comparator are near the 1.8 volt level, the current drain can be as high as 4.5 milliamps, even if the voltage difference is enough to keep the comparator output solidly in one state or the other.
www.sxlist.com /techref/ubicom/analogcomparator.htm   (1268 words)

  
 Op-amp Varieties
The extremely large open-loop gain of an op-amp makes it an extremely sensitive device for comparing its input with zero.
The switching time for - to + is limited by the slew rate of the op-amp.
Also, the input may be tailored to make a comparison to an input voltage other than zero.
hyperphysics.phy-astr.gsu.edu /hbase/electronic/opampvar8.html   (97 words)

  
 Data Structures in Java: Part 9, The Comparator Interface, Part 1
The use of a Comparator is an alternative to the implementation of the Comparable interface.
By implementing the Comparator interface, an object instantiated from the class is eligible for being passed to the constructor for a TreeSet object, which requires an incoming parameter of type Comparator.
The purpose of a Comparator is to compare the values stored in the instance variables of two objects and to return a value indicating which object is greater.
www.developer.com /java/article.php/858411   (2513 words)

  
 New Comparator Group   (Site not responding. Last check: 2007-11-06)
The Comparator Group provides methods development and validation services as well as stability, clinical release, and clinical re-assay testing on comparator products.
Previously, he was a supervisor in both the Dissolution and Stability groups, honing his expertise in dissolution, assay, and impurity testing.
Joining the group are five analysts from other pharmaceutical groups, who have years of experience in all facets of comparator and pharmaceutical analyses.
www.lancasterlabs.com /whatsnew/press/newcomparatorgroup.htm   (258 words)

  
 Data Structures in Java: Part 10, The Comparator Interface, Part 2
For the earlier case that didn't use a Comparator, the names Joe and JOE were considered to be different elements.
When the Comparator was used to eliminate the distinction between upper-case and lower-case characters, the names Joe and JOE were considered to be duplicates.
However, the result of adding those six names was determined by the behavior of the compare method in the Comparator object used by the TreeSet object for managing the collection (three of the names were rejected as duplicates).
www.developer.com /java/article.php/862991   (2153 words)

  
 Optical Comparator - J&L Metrology Optical Comparator, Sales, Service, Parts, New and Recertified Optical ...
The Optical Comparator is used in Aircraft, Electronic, Automotive and Machine Tool facilities on both the shop floor and in QC labs across the globe.
A large inventory of optical comparator charts and overlays in stock and ready to ship to you the same day.
Lens repair and Recertification We are the only Company to have a complete line of MASTER Optical Comparators, The only ones in the world, These machines were used to set your lenses to when you purchased your comparator or lens.
www.jlmetrology.com   (519 words)

  
 Blink comparator - Wikipedia, the free encyclopedia
This blink comparator at Lowell Observatory was used in the discovery of Pluto.
A blink comparator was a viewing apparatus used by astronomers to find differences between photographic plates taken of the same area of the sky at different times.
However, the blinking technique is less used than before because image differencing algorithms are often used to detect moving objects more effectively than human eyes are capable of.
en.wikipedia.org /wiki/Blink_comparator   (358 words)

  
 SoftByte Labs. Comparator home page. Find, delete and copy over duplicate or version files.   (Site not responding. Last check: 2007-11-06)
Keeping track of files and protecting them from loss or damage is a never ending chore for any active PC user.
Here is a simple utility that will take some of the insecurity and the tedium out of finding, deleting and copying over duplicate or version files. With Comparator, you won't need to open two Explorer windows to make painstaking comparisons but you'll still have the Windows system menu available to you by right-clicking a file.
Here, too, is an alternative to the Microsoft® Briefcase -- install this freeware program everywhere you go to keep shared files in sync. Finally, don't neglect full backup routines, but do make use of Comparator to quickly update a small backup set before you get down to some serious work.
www.softbytelabs.com /Comparator   (172 words)

  
 Comparator
myComparator is not formally a Comparator, it is an instance of a
concrete comparator, which sounds to me very much like an instance.
comparator (which is per definition an interface) in the instance of a
www.velocityreviews.com /forums/t148265-comparator.html   (1274 words)

  
 Opamp Comparator
What you need is a better comparator, immune to the noise swinging above and below the comparator's threshold.
It appears the comparator performs well as a zero-crossing detector and all is right with the world.
By choosing thresholds separated by a voltage larger than the noise, the comparator's output produces a nice clean squarewave.
www.ecircuitcenter.com /Circuits/op_comp/op_comp.htm   (1162 words)

  
 Comparator - Glossary
If the company had a profit, then a lower P/E is better than a high P/E, because it means that the stock is "cheaper".
If the company had a loss, then the P/E will be negative, but now a higher negative P/E is better then a smaller negative P/E. This relationship is used by stock-comparator when comparing companies.
Since only price data is available for these securities, the comparison results ranks them according to their current price compared to their 52-week high price.
www.stock-comparator.com /figlos.php3   (1205 words)

  
 Comparator download from File Management category
With Comparator, you won't need to open two Explorer windows to make painstaking comparisons but you'll still have the Windows system menu available to you by right-clicking a file.
Finally, don't neglect full backup routines, but do make use of Comparator to quickly update a small backup set before you get down to some serious work.
Compare Suite provides file and folder comparison with merge and reporting abilities.
www.sofotex.com /Comparator-download_L4773.html   (455 words)

  
 : Interface Comparator
A comparator does comparisons of objects in the universe the comparator is defined over.
A comparator throws an InvalidElementException if passed a null element, or an element outside of its universe.
Tests equality of two objects in the universe over which this comparator is defined.
www.apl.jhu.edu /Notes/Johnson/605.202/jdsl/jdsl/Comparator.html   (264 words)

  
 Comparator : Java Glossary   (Site not responding. Last check: 2007-11-06)
The compare method compares two objects of the class you want to sort.
Here is a very general purpose Comparator for sorting rows of a Table (array of arrays or Vector of arrays) where each element is some sort of Object that implements Comparable.
Beware of using subtraction in writing Comparators rather than < > if there is any possibility you will be using numbers large enough to overflow and give the wrong sign comparing them with subtraction.
mindprod.com /jgloss/comparator.html   (393 words)

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