| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a voltage adjustment circuit capable of reducing a current loss of an amplification circuit to suppress heating of the amplification circuit. <P>SOLUTION: A regulator 111, upon being supplied with a control power source voltage VCC, steps down the voltage down to a first predetermined voltage, and supplies the voltage to a high voltage side power source terminal (hereinafter, high voltage side power source is referred to as high side power source) of an amplification circuit 113 and an amplification circuit 114. A regulator 112, upon being supplied with the control power source voltage VCC, steps down the voltage to a second predetermined voltage and supplies the voltage to a low voltage side power source terminal (hereinafter, low voltage side power source is referred to as low side power source) of the amplification circuit 113 and the amplification circuit 114. With a differential voltage between the high side power source supplied from the regulator 111 and the low side power source supplied from the regulator 112 as a power source voltage, the amplification circuit 113 and the amplification circuit 114 operate. The differential voltage between the first predetermined voltage and the second predetermined voltage is set so as to be a small value necessary for suppressing heating of the amplification circuit 113 and the amplification circuit 114. <P>COPYRIGHT: (C)2012,JPO&INPIT |
