Title:
AUDIO SYSTEM AND POWER SUPPLY CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2018/173220
Kind Code:
A1
Abstract:
A power supply circuit that supplies voltage from a DC power supply to an audio processing device. The power supply circuit comprises: a conversion circuit that converts an AC power supply to the DC power supply; a detection circuit that detects when the AC power supply voltage has been continuously lower than a threshold value for a prescribed time; and a notification circuit that notifies the audio processing device about the voltage drop, if the detection circuit has detected a continuous reduction in the AC power supply voltage.
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| WO/1993/018583 | HIGH EFFICIENCY DUAL MODE POWER AMPLIFIER APPARATUS |
Inventors:
KATAOKA TAKUYA (JP)
SHIMA HITOSHI (JP)
SHIMA HITOSHI (JP)
Application Number:
PCT/JP2017/011842
Publication Date:
September 27, 2018
Filing Date:
March 23, 2017
Export Citation:
Assignee:
YAMAHA CORP (JP)
International Classes:
H03G3/20
Domestic Patent References:
| WO2006132202A1 | 2006-12-14 |
Foreign References:
| JP2007288995A | 2007-11-01 | |||
| JP2009141670A | 2009-06-25 | |||
| JP2014007817A | 2014-01-16 |
Attorney, Agent or Firm:
OHBAYASHI, Akira et al. (JP)
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