Selecting the semiconductor technology for each function: bulk CMOS, RF silicon-on-insulator, silicon-germanium BiCMOS, gallium arsenide or gallium nitride, weighed on frequency, output power, efficiency, noise, integration, cost, supply and the maturity of the foundry's device models and design kit, and confirming the choice with test structures and model checks where the risk calls for it.
This stage with its neighbours. Each row is a discipline active here, shaded by how mature its work is by the end of each stage.
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