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October 2008 [Devices & ICs] Two-Stage LDMOS RFIC Drives WiMAX Power amplifiers (PAs) for modern communications systems are generally designed by cascading and paralleling multiple RF transistors to achieve the required solid-state gain and power. With their wide range of impedancematching, optimization, and architectural options, single-stage discrete RF transistors offer a great deal of flexibility for power-amplifier designers, although with some loss of printedcircuit- board (PCB) space compared to RF... |
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