Title:
電力増幅器
Document Type and Number:
Japanese Patent JP6651835
Kind Code:
B2
Abstract:
A power amplifier and an input signal adjusting method are provided; the power amplifier includes a class-D amplifier and an input signal supplier. The class-D amplifier includes an input portion and a switching device. The switching device is switched according to an input signal that is input to the input portion so that a current is supplied to a load from a power source via the switching device. The input signal supplier supplies the input signal to the input portion of the class-D amplifier, calculates a virtual output voltage to be output from a virtual power source having a prescribed internal impedance characteristic when a current to flow through the load is output from the virtual power source, and adjust an amplitude of the input signal according to the virtual output voltage.
Inventors:
Yohei Otani
Masao Noro
Masao Noro
Application Number:
JP2015247521A
Publication Date:
February 19, 2020
Filing Date:
December 18, 2015
Export Citation:
Assignee:
Yamaha Corporation
International Classes:
H03F3/217; H03F3/185; H04R3/00
Domestic Patent References:
| JP7131272A |
Foreign References:
| US20130083947 | ||||
| US20130136278 | ||||
| US5636284 | ||||
| US4995084 | ||||
| WO2008062748A1 | ||||
| US20140112486 |
Attorney, Agent or Firm:
Takashi Matsumoto