| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an amplification circuit enabling high-speed response and high efficiency.SOLUTION: An amplification circuit includes: an amplification section into which an input signal is input; a signal generation section 35 that performs an AND process of a first pulse signal with a pulse width modulated on the basis of an envelope voltage of the input signal and a second pulse signal delayed from the first pulse signal to generate a first control signal, and performs an AND process of an inverted signal of the first pulse signal and an inverted signal of the second pulse signal to generate a second control signal; and a switching power supply 12 that has a first switch 22 operating on the basis of the first control signal and a second switch 23 operating on the basis of the second control signal, and supplies a power terminal of the amplification section with first power such that a voltage of the power terminal tracks the envelope voltage.</p> |
