| 摘要 |
PROBLEM TO BE SOLVED: To provide a power amplifier circuit provided with a plurality of amplifiers each being supplied with a power supply voltage via a fuse and each amplifying power of an input signal, which carries out control to avoid occurrence of an undesirable blowout in the fuse through which a current of each amplifier including an output current is supplied. SOLUTION: The power amplifier circuit is provided with: the amplifiers (15), (16) each being supplied with the power supply voltage via the fuse (22) and amplifying power of the input signal; and output control sections (31 to 35) for providing a control signal when the current flowing through the fuse (22) exceeds a prescribed reference value, and using the control signal to apply output restriction to the amplifiers (15), (16) so as to limit the current flowing through the fuse (22). COPYRIGHT: (C)2005,JPO&NCIPI |
