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Principle of Attenuator Apr 18, 2017

The attenuator is a circuit used to introduce a predetermined attenuation within the specified frequency range. Generally, the attenuation of the number of decibels and the impedance of the Ohm's characteristics to indicate, in the CATV system widely used in the attenuator to meet the requirements of multi-port level, such as amplifier input, output terminal level control, branch attenuation control.

The attenuator has two kinds of passive attenuator and active attenuator, the active attenuator is compatible with other thermo-sensitive components to form a variable attenuator, the device is used in the amplifier in the automatic gain or slope control circuit, the passive attenuator has a fixed attenuator and a tunable attenuator.