Earphone line control device and earphone

An earphone line control device includes a power supply management unit, a filter unit, a switching circuit and a control unit. The switching circuit includes a switch in series with a resistance, a first end of the power supply management unit and an end of the filter unit are both connected to a p...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Hsieh Kuanhong, Sun Xiaohong, Lin Boqing
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CALCULATING COMPUTING CONTROL OF AMPLIFICATION COUNTING DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PHYSICS PUBLIC ADDRESS SYSTEMS TELEPHONIC COMMUNICATION
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Beschreibung
Zusammenfassung:	An earphone line control device includes a power supply management unit, a filter unit, a switching circuit and a control unit. The switching circuit includes a switch in series with a resistance, a first end of the power supply management unit and an end of the filter unit are both connected to a power supply, a second end of the power supply management unit is connected to a first end of the control unit, the other end of the filter unit is connected to a second end of the control unit, a third end of the power supply management unit is connected to ground, a third end of the control unit is connected to ground, an end of the resistance is connected to the power supply, the other end of the resistance is in series with an end of the switch and connected to a fifth end of the control unit, and the other end of the switch is connected to a forth end of the control unit. When the switch is turned off, the control unit outputs a preset coded pulse signal.