variable attenuator


Also found in: Acronyms.

variable attenuator

[′ver·ē·ə·bəl ə′ten·yə‚wād·ər]
(electronics)
An attenuator for reducing the strength of an alternating-current signal either continuously or in steps, without causing appreciable signal distortion, by maintaining a substantially constant impedance match.
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The magnitude and phase of these predistortion signals are controlled to match those of the intermodulation distortion signals generated by the HPA with the variable attenuator and variable phase shifter.
The "fine tuning" capability provided by the integrated variable attenuator enables amplifier performance to be optimized.
Usually, the phase of a variable attenuator changes as the attenuation level is changed.
The Thermopad[R] temperature variable attenuator (TVA) has gained widespread popularity among RF and microwave circuit designers as a simple solution to compensate gain variation over temperature.
The model AV141-321 Gallium Arsenide (GaAs) IC PHEMT voltage variable attenuator provides high end performance from 2.7 to 4.0 GHz.
The intermodulation distortion signals at the subtracter output are adjusted to satisfy these conditions by a variable attenuator ([A.sub.2]), a phase shifter ([[phi].sub.2]) and an error amplifier 1.
IDT's industry-leading portfolio of RF, mmWave and wireless products now includes RF modulators, demodulators, synthesizers, mixers, digital step attenuators (DSAs), voltage variable attenuators (VVAs), variable gain amplifiers (VGAs), switches, up/down converters, power and low-noise amplifiers, global navigation satellite system (GNSS) front ends, and ultra-wideband (UWB) receivers.
The vendor says design engineers will commonly use these types of variable attenuators when designing and testing concepts in a lab environment.
announces design and sales support for a series of voltage-controlled variable attenuators (WAs) from Skyworks Solutions.
These new variable attenuators meet MIL-STD-202F standards for shock, vibration, altitude, humidity and temperature and are constructed using a durable, but slim line housing, measuring only 0.5” thick.
The MBD2 can operate at short UV wavelengths and is designed to be compatible with larger mirrors, optics, beam homogenizers, spacers, mounts, and other beam delivery system components such as variable attenuators and dual camera systems.
IDT RF products on display will include synthesizers, mixers, amplifiers, variable gain amplifiers (VGAs), digital step attenuators (DSAs), demodulators, broadband modulators, switches, wideband voltage variable attenuators, and highly integrated solutions

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