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Definition of "Variable Attenuator" |
An attenuator for reducing the strength of an ac signal either continuously or in steps, without causing signal distortion. / By changing the bias current through a PIN diode, it's possible to quickly change the RF resistance At high frequencies, the PIN diode appears as a resistor whose resistance is an inverse function of its forward current. Consequently, PIN diode can be used in some variable attenuator designs as amplitude modulators or output leveling circuits. / Adaptive Routing describes the capability of a system, through which routes are characterized by their destination, to alter the path that the route takes through the system in response to a change in conditions. |
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