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A simple sorting network consisting of four wires and five connectors. In computer science, comparator networks are abstract devices built up of a fixed number of "wires", carrying values, and comparator modules that connect pairs of wires, swapping the values on the wires if they are not in a desired order.
Comparators are closely related to operational amplifiers, but a comparator is designed to operate with positive feedback and with its output saturated at one power rail or the other. If necessary, an op-amp can be pressed into service as a poorly performing comparator, but its slew rate will be impaired.
In most cases a comparator is implemented using a dedicated comparator IC, but op-amps may be used as an alternative. Comparator diagrams and op-amp diagrams use the same symbols. A simple comparator circuit made using an op-amp without feedback simply heavily amplifies the voltage difference between Vin and VREF and outputs the result as Vout.
It employs two comparators to detect over-voltage or under-voltage. [2] Each single comparator detects the common input voltage against one of two reference voltages, normally upper and lower limits. [3] Outputs behind a logic gate like AND detect the input as in range of the so-called "window" between upper and lower reference.
Comparators are used in central processing units (CPUs) and microcontrollers (MCUs). Examples of digital comparator include the CMOS 4063 and 4585 and the TTL 7485 and 74682. An XNOR gate is a basic comparator, because its output is "1" only if its two input bits are equal. The analog equivalent of digital comparator is the voltage comparator.
various data comparators including cmp and diff; A digital comparator; An optical comparator; Mathematical symbols used for comparison, for example can the equals sign be used to compare if two values are equivalent, or inequality signs can be used to compare if two values are different; The Comparator Hypothesis in the psychology of motivation
The term "Cryogenic Current Comparator" stems from κρυος (Gr. frost, ice) and comparare (Lat. compare). The two quantum effects used in a CCC are the ideal diamagnetism of the superconductor, caused by the Meissner effect, and the macroscopic quantum interference of currents in a superconducting quantum sensor.
Mikrokator 509–4 C.E Johansson Eskilstuna Sweden. A Johansson Mikrokator (also called Abramson's movement) is a mechanical comparator used to obtain mechanical magnification of the difference in length as compared to a standard.