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In electrical engineering, impedance is the opposition to alternating current presented by the combined effect of resistance and reactance in a circuit. [1]Quantitatively, the impedance of a two-terminal circuit element is the ratio of the complex representation of the sinusoidal voltage between its terminals, to the complex representation of the current flowing through it. [2]
In electrical engineering, the input impedance of an electrical network is the measure of the opposition to current (), both static and dynamic (), into a load network or circuit that is external to the electrical source network.
Impedance is the complex-valued generalization of resistance.It may refer to: Acoustic impedance, a constant related to the propagation of sound waves in an acoustic medium
In analog circuits a high impedance node is one that does not have any low impedance paths to any other nodes in the frequency range being considered.Since the terms low and high depend on context to some extent, it is possible in principle for some high impedance nodes to be described as low impedance in one context, and high impedance in another; so the node (perhaps a signal source or ...
In electrical engineering, the output impedance of an electrical network is the measure of the opposition to current flow (), both static and dynamic (), into the load network being connected that is internal to the electrical source.
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Source and load impedance circuit. In electrical engineering, impedance matching is the practice of designing or adjusting the input impedance or output impedance of an electrical device for a desired value.
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