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Differential PA in IC technology are more tolerant to common mode noise through power supply and substrate coupling. The performance of a differential PA is limited in terms of high power consumption, almost double of the single stage counterpart and low dynamic range. The cot of implementing differential PA in IC technology is lower than the current implementation on GaAs substrate.
IF we use a balun to take the signal from each side of differential structure.
The current should be the same as one signle stage due to they generate
the same output power and the same power efficiency.
Am I right? or something I lose?
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