| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a chip of a power amplifier for a dual band portable terminal. SOLUTION: On a single chip, first and second power amplifiers are formed, and they comprise a multi-emitter bipolar transistor, respectively. A first unit transistor of the first power amplifier and a second unit transistor of the second power amplifier are substantially alternately placed in a plane.
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