Title:
AMPLIFYING DEVICE, ACOUSTIC PROCESSING DEVICE AND METHOD FOR CONTROLLING CLASS-D AMPLIFIER CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/008627
Kind Code:
A1
Abstract:
This amplifying device is provided with: a self-excited class-D amplifier circuit including a modulation circuit in which pulse modulation by self-excited oscillation is performed on an acoustic signal; and an operation control unit that supplies, to the modulation circuit, a synchronous signal synchronized with the self-excited oscillation when an index related to the volume of the acoustic signal is lower than a threshold value, and stops supplying the synchronous signal to the modulation circuit when the index is higher than the threshold value.
Inventors:
TOGAWA TAKESHI (JP)
Application Number:
PCT/JP2017/024341
Publication Date:
January 10, 2019
Filing Date:
July 03, 2017
Export Citation:
Assignee:
YAMAHA CORP (JP)
International Classes:
H03F3/217; H03F3/38; H03F3/68
Foreign References:
| JP2012049893A | 2012-03-08 | |||
| JP2005269580A | 2005-09-29 | |||
| JP2009111693A | 2009-05-21 | |||
| JP2017073583A | 2017-04-13 |
Attorney, Agent or Firm:
OHBAYASHI, Akira et al. (JP)
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