Topic: Definition of Impedance Matching
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How to Match Impedance
In radio communications, impedance matching is the process of matching electrical parameters of a transmitted signal to physical and electrical parameters of an antenna. A properly matched antenna ensures that the greatest amount of signal ... Read More »
Source: http://www.ehow.com/how_8720120_match-impedance.html
How to Match the Impedance on a Radio and Speaker
Connecting a radio to a speaker requires more thought than just connecting the wires. A radio has an output impedance just like a speaker that has an input impedance. To transfer maximum power from the radio to the speaker, the impedance of... Read More »
Source: http://www.ehow.com/how_12042914_match-impedance-radio-speaker.ht...
How to Connect an Impedance Matching Volume Control
Impedance matching volume controls are often installed in a daisy-chain fashion. These volume controls allow multiple pairs of speakers to be connected to a stereo amplifier, without damaging the amp. Impedance matching performs the same fu... Read More »
Source: http://www.ehow.com/how_7625417_connect-impedance-matching-volume...
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Definition of Impedance Matching
(n.) The technique of choosing or adjusting electric circuits and components so that the impedance of the load is equal to the internal impedance of the power source, thereby optimizing the power transfer from source to load
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Impedance matching is setting the input impedance (load) equal to the fixed output impedance (source) to which it is connected, in order to maximize the power transfer. Matching is obtained when Z load = Z source . In audio and sound engine...
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Source: http://wiki.answers.com/Q/What_is_the_need_of_impedance_matching
Z = SQR (R² + XL²) Where: Z = Impedance (ohm) R = Resistance (ohm) XL= Inductance reactance (ohm) Impedance is an AC resistance.
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Source: http://wiki.answers.com/Q/What_is_definition_of_impedence
Audio amplifiers use no impedance matching. We use bridging. That means low output impedance and high input impedance.
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Source: http://wiki.answers.com/Q/What_are_the_importance_of_impedance_ma...
( ′mach·iŋ im¦pēd·əns ) (electricity) Impedance value that must be connected to the terminals of a signal-voltage source for proper matching.
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Source: http://www.answers.com/topic/matching-impedance
( im′pēd·əns ′mach ) (electricity) The condition in which the external impedance of a connected load is equal to the internal impedance of the source or to the surge impedance of a transmission line, thereby giving maximum transfer of energ...
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Source: http://www.answers.com/topic/impedance-match
Because it has high i/p impedance
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Source: http://wiki.answers.com/Q/How_Emitter_follower_is_used_as_impedan...
