Mute circuit for a microphone
First Claim
1. An electronic circuit, comprising:
- a microphone operable to transform a sound wave into an electrical signal;
a current source electrically coupled to the microphone and operable to provide phantom power to the microphone;
an infrared diode electrically coupled to the current source and operable to focus infrared light away from the microphone;
an infrared detection phototransistor electrically coupled to the current source and operable to detect infrared light reflected from an illuminated target; and
a muting transistor electrically coupled to the infrared detection transistor and the microphone and operable to attenuate the electrical signal from the microphone when the infrared detection transistor detects infrared light.
4 Assignments
0 Petitions
Accused Products
Abstract
An apparatus having a microphone and a mute circuit (not shown in detail here) operable to be actuated by a rotating door assembly. The apparatus provides a mute circuit suitable to mute the audio microphone when the rotating door assembly is in a closed position and unmute the audio microphone when the rotating door assembly is not in the closed position. Additionally, the mute circuit is impervious to generating audible disturbances in the microphone signal when the rotating assembly door is rotated between open and closed positions. This advantageously allows for the microphone to essentially transition to off when the rotating door assembly is closed and transition to on when the rotating door assembly is open and do so without additional audio disturbance.
6 Citations
20 Claims
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1. An electronic circuit, comprising:
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a microphone operable to transform a sound wave into an electrical signal; a current source electrically coupled to the microphone and operable to provide phantom power to the microphone; an infrared diode electrically coupled to the current source and operable to focus infrared light away from the microphone; an infrared detection phototransistor electrically coupled to the current source and operable to detect infrared light reflected from an illuminated target; and a muting transistor electrically coupled to the infrared detection transistor and the microphone and operable to attenuate the electrical signal from the microphone when the infrared detection transistor detects infrared light. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus comprising:
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a microphone operable to transform a sound wave into an electrical signal, the microphone mounted to a microphone housing; a current source electrically coupled to the microphone and operable to provide phantom power to the microphone; an infrared diode electrically coupled to the current source and operable to focus infrared light away from the microphone; an infrared detection phototransistor electrically coupled to the current source and operable to detect infrared light reflected from an illuminated target; a muting transistor electrically coupled to the infrared detection transistor and the microphone and operable to attenuate the electrical signal from the microphone when the infrared detection transistor detects infrared light; and a rotating door assembly that is rotatably attached to the microphone housing such that the rotating door assembly may be rotated to a first position to engage the microphone mute circuit and rotated to a second position to disengage the microphone mute circuit. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A system comprising:
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an audio device, including; a microphone operable to transform a sound wave into an electrical signal, the microphone mounted to a microphone housing; a current source electrically coupled to the microphone and operable to provide phantom power to the microphone; an infrared diode electrically coupled to the current source and operable to focus infrared light away from the microphone; an infrared detection phototransistor electrically coupled to the current source and operable to detect infrared light reflected from an illuminated target; a muting transistor electrically coupled to the infrared detection transistor and the microphone and operable to attenuate the electrical signal from the microphone when the infrared detection transistor detects infrared light; and a rotating door assembly that is rotatably attached to the microphone housing such that the rotating door assembly may be rotated to a first position to engage the microphone mute circuit and rotated to a second position to disengage the microphone mute circuit; an audio device housing operable to house the audio device and operable to be securably attached to a platform; and a table having a flat work area and a vertical platform area, the platform area forming the platform to which the audio device housing may be securably attached. - View Dependent Claims (18, 19, 20)
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Specification