A voltage-controlled attenuator is a type of RF attenuator that provides a variable attenuation level that can be controlled by a control voltage applied to it. Unlike fixed attenuators (which have a fixed attenuation level that cannot be modified), the attenuation levels of variable attenuators can be changed to any required value.
Voltage-controlled attenuators are ideal for electronic warfare, test & measurement, military, space, radar, use as a building block in communications systems and more applications.
Important Parameters to Consider in Voltage Controlled Attenuator:
- Operating Frequency: This is the frequency range at which a voltage-controlled oscillator is fully functional or provides the best performance.
- Attenuation Range: This is the range of attenuation that you want to work with.
- Attenuation Accuracy: This is the level by which the attenuation level can vary.
- Impedance: Attenuators are usually designed to operate with a characteristic impedance of 50 ohms; however, 75-ohms attenuators are also quite common. It is important to match the characteristic impedance of the attenuator to that of the system/circuity where it will be used. This will minimize reflections.
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