Patent ID: 9257947
Filing Date: 2016-02-09
CPC Classification: H03F

Claim Text:
1. A semiconductor device comprising: a power amplifier for amplifying RF signals in a plurality of frequency bands; an output matching circuit connected to an output of said power amplifier; a first capacitor connected at a first end to an output of said output matching circuit; a plurality of output paths; a switch connected to a second end of said first capacitor and directing each of the RF signals to one of said plurality of output paths in accordance with frequency band of each of the RF signals; and a plurality of second capacitors, each second capacitor being connected in series to a respective one of said output paths, wherein where C IN is the capacitance of said first capacitor, C OUT k is the capacitance of a kth one of said second capacitors, k=1, 2, . . . , N, and N is the number of said second capacitors.