Power amplifier

US9590568B2 · kind B2 · utility

Assignee

• YAMAHA CORPORATION · JP

Inventors

• Yohei Otani · Hamamatsu, JP
• Masao Noro · Hamamatsu, JP

Key dates

• Filing date: Jul 17, 2015
• Grant date: Mar 7, 2017
• Expiry date: Jul 17, 2035

Classification

• Technology area (CPC —): General

Abstract

A power amplifier includes a class D amplification section and a load current feedback circuit. The class D amplification section includes an input section and a switching section serving as an output stage and switched depending on a signal input to the input section, and outputs current from a power source to a load via the switching section. The load current feedback circuit negatively feeds back the current flowing in the load to the input section of the class D amplification section.