Patent ID: 9270263
Filing Date: 2016-02-23
CPC Classification: H03K,H04B

Claim Text:
1. A switching device comprising: a switch that selects and connects one of at least three terminals including a first terminal, a second terminal, and a third terminal to a common terminal; and a compensating circuit that shifts a phase of at least one of a first signal transmitted through the second terminal and a second signal transmitted through the third terminal so that the first signal and the second signal compensate each other and unifies and outputs the first signal and the second signal to a fourth terminal as a third signal, or that branches a third signal input to the fourth terminal into the first signal and the second signal, wherein the switching device is configured to have at least either of the following features (a) or (b): (a) when the switch selects and connects the first terminal to the common terminal and when a fourth signal is input to the first terminal and output from the common terminal, each of the first signal and the second signal is a part of the fourth signal input to the first terminal and the compensating circuit unifies and outputs the first signal and the second signal to the fourth terminal as the third signal, or (b) when the switch selects and connects the first terminal to the common terminal and when a fourth signal is input to the common terminal and output from the first terminal, the compensating circuit branches the third signal input to the fourth terminal into the first signal and the second signal, and each of the first signal and the second signal is added into the fourth signal output from the first terminal.