Patent ID: 9577691
Date: 2017-02-21
CPC Classifications: H04B,H04L

Claim:
1. A front end circuit comprising: a switch that includes a common terminal and a plurality of individual terminals including a first individual terminal and a second individual terminal, inputs to the common terminal at least two kinds of reception signals of different frequency bands which do not sandwich a transmission frequency band and in which at least a portion of reception frequency bands are close to or overlap with each other, outputs one of the at least two kinds of reception signals to an individual terminal selected from the first and second individual terminals, and grounds a non-selected terminal; and a balun including a first terminal and a second terminal defining unbalanced ports and a third terminal and a fourth terminal defining balanced ports; wherein the first individual terminal of the switch is directly or indirectly connected to the first terminal of the balun, the second individual terminal of the switch is directly or indirectly connected to the second terminal of the balun, and the at least two kinds of reception signals are output in a balanced mode from the third terminal and the fourth terminal of the balun.