SEMICONDUCTOR ELEMENT AND HIGH FREQUENCY POWER AMPLIFYING APPARATUS

摘要

PROBLEM TO BE SOLVED: To attain downsizing and cost reduction of a semiconductor element. SOLUTION: In the semiconductor element including: a semiconductor substrate; and transistors formed on the semiconductor substrate and for configuring first-stage and next-stage amplifiers of first and second amplifier systems, part of the region of the semiconductor substrate includes: first, second, and third transistors configuring the first-stage amplifier of the first amplifier system and the next-stage amplifier of the second amplifier system; and a switch element for selecting two prescribed transistors among the three transistors on the basis of a received switching signal. By switching the switch element, the first-stage amplifier of the first amplifier system is configured with the second and third transistors or the next-stage amplifier of the second amplifier system is configured with the first and second transistors. COPYRIGHT: (C)2005,JPO&NCIPI