Microphone device including light emitting elements

摘要

A microphone device includes an audio signal output circuit that balanced-outputs, through a balanced transmission line, an audio signal output from a condenser microphone unit, a balanced output terminal including a hot terminal, a cold terminal, and a ground terminal connected to the balanced transmission line, a power supply circuit that supplies a phantom power supply to the audio output circuit from the balanced output terminal through the balanced transmission line, and a display circuit including light emitting elements that perform lighting and non-lighting according to an operation of a manual switch, and the display circuit includes constant current elements that generate a constant current through the balanced transmission line, a constant voltage element connected to the constant current elements and which generates a constant voltage, and light emitting elements connected to the constant current elements, and to which the constant voltage by the constant voltage element is applied.

主权项

1. A microphone device including light emitting elements, comprising:
a condenser microphone unit; an audio output circuit configured to balanced-output, through a balanced transmission line, an audio signal output from the condenser microphone unit; a balanced output terminal including a hot terminal, a cold terminal, and a ground terminal connected to the balanced transmission line; a power supply circuit configured to supply a phantom power supply to the audio output circuit from the balanced output terminal through the balanced transmission line; a manual switch; and a display circuit including the light emitting elements that perform lighting and non-lighting according to an operation of the manual switch, wherein the display circuit includes
constant current elements that generate a constant current through the balanced transmission line,a constant voltage element that is connected to the constant current elements and generates a constant voltage, andthe light emitting elements connected to the constant current elements, and to which the constant voltage by the constant voltage element is applied.