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A fully-differential, digital programmable gain amplifier (PGA) with a gain control range of 31 dB and step size of 1 dB is presented. The chip is fabricated in a 0.13 µm BiCMOS technology and consumes 284 mW. At a maximum gain of 25 dB, the PGA exhibits a 3-dB bandwidth of 10.1 GHz. The measured gain error for all 32 possible gain settings is between −0.19/+0.46 dB at 1 GHz. Up to 13 GHz the third...
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