RF Power Amplifiers - MIT OpenCourseWare
8 RF IF Linear and Non-linear PAs “Non-linear PA” generally refers to a PA designed to operate with constant P IN, output power varies by changing gain P OUT (dBm) P IN (dBm) Designed to operate here: NOT fixed gain! P OUT adjusted through bias control Operation in saturated mode leads to high peak efficiencies > 50%; “backed-off” efficiencies drop quickly
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