| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna switch semiconductor integrated circuit the current consumption of which can be reduced. <P>SOLUTION: Of two control input signals INA, INB which are fed to a logic circuit 17 which controls the turning-on/off of a plurality of switching FETs 4 to 11, the control input signal INA for switching a sending mode and a receiving mode is fed to an oscillation circuit 18, thereby making the oscillation circuit 18 operate only during the sending mode in which the logic circuit 17 needs a high voltage, and a voltage raising circuit 16 operates as a result, whereby a raised voltage is supplied to the logic circuit 17. During the receiving mode, the oscillation circuit 18 stops, and the voltage raising circuit 16 stops. With a switch 201 turned on using the logic circuit 32, a power source voltage is supplied directly to the logic circuit 17 when the voltage raising circuit 16 is not in operation. This shortens the operation time of the voltage raising circuit 16 and reduces the current consumption. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
