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A novel broadband, 8 to 45 GHz 4-bit MMIC digital attenuator which could be used for gain control of transceivers has been designed. The attenuator has been designed with 0.25 ??m GaAs pHEMT process. Ultra broad bandwidth and high attenuation accuracy has been achieved by using different types of configurations. This attenuator has 1 dB resolution and 15 dB dynamic range. The normalized attenuation...
In this paper, a newly active bias linearizer is introduced based on GaAs HBT technology. The proposed linearizer composed of active bias circuit and a reverse-biased diode maintains the fixed base voltage of power stage HBTs, effectively improves the gain compression, and more importantly, it consumes no additional die area and DC power. A two-stage power amplifier for wide-band code division multiple...
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