Title:
AMPLIFIER DEVICE, AUDIO DEVICE, AND METHOD FOR CONTROLLING AMPLIFIER DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/224867
Kind Code:
A1
Abstract:
[Problem] To provide an amplifier device, an audio device, and a method for controlling an amplifier device with which it is possible to reduce generation of a back-EMF voltage and to improve sound quality. [Solution] An amplifier device 2 is provided with a back-EMF voltage shorting circuit 25 between a power supply terminal 23 on the primary side of an output transformer 22 and a constant potential terminal 24 which is grounded. In the back-EMF potential shorting circuit 25, a capacitor C and a diode D are provided in parallel. When the back-EMF voltage input into the circuit of the amplifier device 1 is a positive potential, a back-EMF current flows from the power supply terminal 23 toward the constant potential terminal 24, where the back-EMF current is in short state due to the capacitor C. On the other hand, when the input back-EMF voltage is a negative potential, a back-EMF current flows from the constant potential terminal 24 toward the power supply terminal 23, where a short state is created by the diode D.
Inventors:
MACHIDA KAZUAKI (JP)
Application Number:
PCT/JP2022/017555
Publication Date:
October 27, 2022
Filing Date:
April 12, 2022
Export Citation:
Assignee:
MORIYAMA MEIBOKU CO LTD (JP)
International Classes:
H04R3/00; H03F1/26; H03F3/22
Foreign References:
| JP2003163548A | 2003-06-06 | |||
| JPH10224884A | 1998-08-21 | |||
| JPS4972146U | 1974-06-22 |
Attorney, Agent or Firm:
ARIYOSHI Shuichiro et al. (JP)
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