Title:
PHANTOM POWER SUPPLY CIRCUIT
Document Type and Number:
Japanese Patent JP2017092589
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce generation of click noise by a simple circuit configuration.SOLUTION: The present invention relates to a phantom power supply circuit 10 comprising: a phantom power source PW for supplying power to a capacitor microphone; an input-side terminal 1 to which the capacitor microphone is connected; an output-side terminal 2 to which output equipment is connected; a signal line 3 connecting the input-side terminal and the output-side terminal; a switch SW10 for the phantom power source that is connected between the phantom power source and the signal line; a detection circuit 5 for detecting a pulsed current that is generated from the phantom power source when actuating the switch; and an attenuation circuit 6 which attenuates an output signal when the detection circuit 5 detects a pulsed current. The signal line 3 includes: a reference potential line (3a) connected at a reference potential; and output signal lines 3b, 3c in which output signals flow. The phantom power source and the switch are connected in series between the reference potential line and the output signal lines, and the detection circuit is connected between the switch and the reference potential line.SELECTED DRAWING: Figure 1
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Inventors:
YOSHINO SATOSHI
AKINO YUTAKA
AKINO YUTAKA
Application Number:
JP2015217305A
Publication Date:
May 25, 2017
Filing Date:
November 05, 2015
Export Citation:
Assignee:
AUDIO TECHNICA KK
International Classes:
H04R3/00; G06F1/26
Attorney, Agent or Firm:
Keiichi Nishimura