| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve power saving for power amplification. <P>SOLUTION: The amplifier circuit, amplifying an input signal into an amplification signal, includes: a pulse density modulation section that outputs a density modulation pulse with a density modulated correspondingly to a difference between the input signal and the amplification signal; a delay circuit that delays an output of the pulse density modulation pulse correspondingly to the difference; a power supply section that supplies electric power for the amplification; and a switch section that switches a switch for power supply from the power supply section to output the amplification signal, correspondingly to the pulse output from the delay circuit. <P>COPYRIGHT: (C)2013,JPO&INPIT |
