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Impedance matching |
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Impedance matching The use of electric circuits and devices to establish the condition in which the impedance of a load is equal to the internal impedance of the source. This condition of impedance match provides for the maximum transfer of power from the source to the load. The maximum power transfer theorem of electric network theory states that at any given frequency the maximum power is transferred from the source to the load when the load impedance is equal to the conjugate of the generator impedance. When these conditions are satisfied, the power is delivered with 50% efficiency; that is, as much power is dissipated in the internal impedance of the generator as is delivered to the load. In general, the load impedance will not be the proper value for maximum power transfer. A network composed of inductors and capacitors may be inserted between the load and the generator to present to the generator an impedance that is the conjugate of the generator impedance (see illustration). How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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This is not a good impedance match and the pull up current changes with the termpwr voltage. The SCSI bus termination provides the negation of the signal when no driver is actively driving the bus and provides an impedance match. Trazar Corporation is unveiling the industry's first configurable automatic impedance match (CAIM) development platform for RF Matches, called Horizon Match(TM), that is expected to reduce design and development time by more than half. |
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