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October 2005 [Components] Overlay Inductor Aids Power Amplifier Match Shrinking cell phones have required shrinking components, including the power amplifier (PA). In just the last four years, the PA module in GSM cellular handsets has shrunk from 10 × 10 mm to a mere 5 × 5 mm (a model TQM7M4006 from TriQuint Semiconductor, for example). But in spite of the size reduction, performance must also improve, requiring clever design strategies. For example, to maintain high power-added efficiency (PAE) losses in the PA's output matching network should be... |
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