Music reproducing device

Patent metadata

Field	Value
Publication number	US-2017064455-A1
Application number	US-201615238634-A
Country	US
Kind code	A1
Filing date	Aug 16, 2016
Priority date	Sep 1, 2015
Publication date	Mar 2, 2017
Grant date	—

Abstract

To reduce signal output and wiring to a D/A converter (DAC).
A DAP 1 comprises a DAC 7 that D/A-converts LR 2 channels digital audio data into LR 2 channels analog audio data, an amplification circuit 9 that amplifies the LR 2 channels analog audio data that the DAC 7 D/A-converts, a DAC 8 that D/A-converts the LR 2 channels digital audio data into the LR 2 channels analog audio data, and an amplification circuit 10 that amplifies inverted LR 2 channels analog audio data that the LR 2 channels analog audio data that the DAC 8 D/A-converts is inverted.

First claim

What is claimed is:

1 . A music reproducing device having a balanced output and an unbalanced output comprising: a first D/A converter that D/A-converts a left and right 2 channels digital audio signal into a left and right 2 channels analog audio signal;
a first amplification circuit that amplifies the left and right 2 channels analog audio signal that the first D/A converter D/A-converts; a second D/A converter that D/A-converts the left and right 2 channels digital audio signal into the left and right 2 channels analog audio signal; and a second amplification circuit that amplifies an inverted left and right 2 channels analog audio signal that the left and right 2 channels analog audio signal that the second D/A converter D/A-converts is inverted.

2 . The music reproducing device according to claim 1 further comprising: a first power source circuit that supplies power source voltage to the first D/A converter and the first amplification circuit;
a second power source circuit that supplies power source voltage to the second D/A converter and the second amplification circuit; and
a controller,
wherein the controller shuts down the second power source circuit in case of the unbalance output.

Assignees

• Onkyo Kk

Inventors

• Asao Kei
• Kawaguchi Tsuyoshi
• Yoshida Makoto
• SHIOZAKI Takanori
• Nakanishi Yoshinori
• Asahara Hiroyuki
• Kitagawa Norimasa

Classifications

• H04R5/04

  Circuit arrangements, {e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments (combinations of amplifiers H03F3/68; stereophonic systems H04S)} · CPC title

• H03F3/45475

  using IC blocks as the active amplifying circuit · CPC title

• H04R5/033 Primary

  Headphones for stereophonic communication {(details thereof, e.g. relating to batteries, cables or control elements H04R1/10)} · CPC title

• H03F2203/7227

  the gated amplifier being switched on or off by a switch in the supply circuit of the amplifier · CPC title

• H03F2200/33

  Bridge form coupled amplifiers; H-form coupled amplifiers · CPC title