Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
AMPLIFYING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/008628
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, wherein a synchronous signal synchronized with the self-excited oscillation is supplied to the modulation circuit; and a band-stop filter for attenuating a component of a frequency band including the frequency of the synchronous signal among output signals from the class-D amplifier circuit.

Inventors:
TOGAWA, Takeshi (Nakazawa-cho Naka-ku, Hamamatsu-sh, Shizuoka 50, 〒4308650, JP)
Application Number:
JP2017/024342
Publication Date:
January 10, 2019
Filing Date:
July 03, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
YAMAHA CORPORATION (10-1, Nakazawa-cho Naka-ku, Hamamatsu-sh, Shizuoka 50, 〒4308650, JP)
International Classes:
H03F3/217; H03F3/38; H03F3/68
Attorney, Agent or Firm:
OHBAYASHI, Akira et al. (Ochanomizu Wing Building, 6th Floor 2-15-13 Hongo Bunkyo-k, Tokyo 33, 〒1130033, JP)
Download PDF: