Patent ID: 8391805
Filing Date: 2013-03-05
Classification: H03K,H04B

Abstract:
1. A semiconductor switch circuit comprising: a switch section including an input-output terminal, a plurality of radio frequency signal terminals, and a plurality of semiconductor switch elements, the plurality of semiconductor switch elements switching a conduction state and a non-conduction state between the input-output terminal and the plurality of radio frequency signal terminals; a decoder section configured to generate a switch control signal controlling a conduction state and a non-conduction state of each of the plurality of semiconductor switch elements based on a terminal switching control signal switching the conduction state and the non-conduction state between the input-output terminal and the plurality of radio frequency signal terminals; a DC-DC converter configured to generate a first potential; a driver section configured to supply the first potential to a gate electrode of one of the semiconductor switch elements placed in one state of the conduction state and the non-conduction state, and to supply a second potential to a gate electrode of one of the semiconductor switch elements placed in one other state of the conduction state and the non-conduction state; a first filter circuit electrically connected in series between the DC-DC converter and the driver section and configured to output the first potential to the driver section; a first filter bypass circuit electrically connected in parallel with the first filter circuit; and a first bypass control circuit configured to supply a first mode signal to the first filter bypass circuit so that the first filter bypass circuit is placed in the conduction state, when the conduction state and the non-conduction state between one of the plurality of radio frequency signal terminals and the input-output terminal are switched.