US 9,871,553 B2Granted

Audio apparatus and audio communication channel circuit

AssigneeTendyron Corporation

InventorDongsheng Li

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Abstract

Disclosed are audio apparatuses and audio communication channel circuits. The circuit includes an audio connector, an identification circuit, a first and a second audio communication channel. An output terminal of the first channel is connected to one of a first and a second pin, an output terminal of the second channel is connected to the other, a first terminal of the identification circuit is connected to one of the first and second pin, and a second terminal of the identification circuit is connected to the other. The circuit further includes: a first pull-down resistor with a first terminal connected to the first channel and a second terminal connected to ground; and a second pull-down resistor with a first terminal connected to the second channel and a second terminal connected to ground. With the present disclosure, the type of hosts that may be compatible with the audio apparatus is enlarged.

Claims20

Dependent claims

An audio communication channel circuit of an audio apparatus comprising an audio connector, an identification circuit, a first audio communication channel and a second audio communication channel, wherein, an output terminal of the first audio communication channel is connected to one of a first pin and a second pin of the audio connector via a first capacitor, an output terminal of the second audio communication channel is connected to the other one of the first pin and the second pin of the audio connector via a second capacitor, a first terminal of the identification circuit is connected to one of the first pin and the second pin, and a second terminal of the identification circuit is connected to the other one of the first pin and the second pin;

the audio communication channel circuit is characterized in further comprising:
a first pull-down resistor with a first terminal connected to an output terminal of the first audio communication channel and a second terminal connected to ground;
and a second pull-down resistor with a first terminal connected to an output terminal of the second audio communication channel and a second terminal connected to ground, wherein, a resistance value of the first pull-down resistor and a resistance value of the second pull-down resistor are in a preset range, the first pin is one of a pin corresponding to a microphone (MIC) contact of a host and a pin corresponding to a ground (GND) contact of the host when the audio apparatus is connected to the host, and the second pin is the other one of the pin corresponding to the MIC contact of the host and the pin corresponding to the GND contact of the host when the audio apparatus is connected to the host.

An audio apparatus, comprising the audio communication channel circuit, wherein the audio communication channel circuit comprises an audio connector, an identification circuit, a first audio communication channel and a second audio communication channel, wherein, an output terminal of the first audio communication channel is connected to one of a first pin and a second pin of the audio connector via a first capacitor, an output terminal of the second audio communication channel is connected to the other one of the first pin and the second pin of the audio connector via a second capacitor, a first terminal of the identification circuit is connected to one of the first pin and the second pin, and a second terminal of the identification circuit is connected to the other one of the first pin and the second pin;

the audio communication channel circuit further comprises:
a first pull-down resistor with a first terminal connected to an output terminal of the first audio communication channel and a second terminal connected to ground;
and a second pull-down resistor with a first terminal connected to an output terminal of the second audio communication channel and a second terminal connected to ground, wherein, a resistance value of the first pull-down resistor and a resistance value of the second pull-down resistor are in a preset range, the first pin is one of a pin corresponding to a microphone (MIC) contact of a host and a pin corresponding to a ground (GND) contact of the host when the audio apparatus is connected to the host, and the second pin is the other one of the pin corresponding to the MIC contact of the host and the pin corresponding to the GND contact of the host when the audio apparatus is connected to the host.

Dependencies are inferred from the claim text.

Facts

Application: 15/518,380Filed 4 Aug 2015
Priority: CN 2014 1 075701010 Dec 2014
Published: US 2017/0310354 A126 Oct 2017
Granted: 16 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04B 1/401
Circuits: for selecting or indicating operating mode
H04R 3/00
Circuits for transducers
H04R 5/04
Stereophonic arrangements: circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker…
H04R 2420/09
Details of connection covered by H04R, not provided for in its groups: applications of special connectors, e.g. USB, XLR, in loudspeakers,…