CN203027365U - Audio output control circuit and TV set - Google Patents
Audio output control circuit and TV set Download PDFInfo
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- CN203027365U CN203027365U CN 201220590052 CN201220590052U CN203027365U CN 203027365 U CN203027365 U CN 203027365U CN 201220590052 CN201220590052 CN 201220590052 CN 201220590052 U CN201220590052 U CN 201220590052U CN 203027365 U CN203027365 U CN 203027365U
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Abstract
The utility model discloses an audio output control circuit and a TV set with the audio output control circuit. The audio output control circuit comprises an audio output module used for outputting an audio signal; a power amplification module which amplifies the audio signal; an earphone plug which is connected with an earphone, wherein the earphone or a speaker is controlled to be connected with the power amplification module according to the connection state of the earphone and the earphone plug such that the power amplification module outputs the amplified audio signal to the earphone or the speaker. According to the audio output control circuit and the TV set, an earphone insertion detection circuit is saved, thus the cost of the audio output control circuit is reduced, and the industrial production is facilitated.
Description
Technical field
The utility model relates to technical field of electronic products, particularly a kind of audio frequency output control circuit and television set.
Background technology
In the electronic products such as mobile phone, computer, notebook computer, TV, DVD and CD, the audio frequency output control circuit in most electronic products includes headset plug, audio frequency output module, power of loudspeaker amplification electronic circuit, earphone power amplification electronic circuit and plug and detects electronic circuit.When headset plugging detection electronic circuit detected earphone plugged earphone plug, output was turn-offed loudspeaker signal to the audio frequency output module, was turn-offed the audio signal that exports the power of loudspeaker amplifying circuit to by the audio frequency output module, thereby loud speaker is quiet; When headset plugging detected electronic circuit and earphone detected and extract, output recovered loudspeaker signal to the audio frequency output module,, is played sound thereby recover loud speaker to the power of loudspeaker amplifying circuit by audio frequency output module output audio signal.The connection status of plug-pull detecting circuit Test earphone and headset plug is set due to needs, thereby has increased the cost of audio frequency output control circuit.
The utility model content
Main purpose of the present utility model is to provide a kind of audio frequency output control circuit, is intended to reduce the cost of audio frequency output control circuit.
To achieve these goals, the utility model provides a kind of audio frequency output control circuit, and this audio frequency output control circuit comprises:
The audio frequency output module is used for output audio signal;
Power amplifier module amplifies described audio signal;
Headset plug is connected with earphone, and is connected with described power amplifier module with the connection status described earphone of control or the loud speaker of headset plug according to described earphone, and the audio signal after amplifying for power amplifier module exports earphone or loud speaker to.
Preferably, described headset plug comprises left channel signals input, right-channel signals input and common ground end; Described loud speaker comprises left channel loudspeaker and right channel loudspeaker; Described headset plug comprises the first end that is connected with described common ground end, the second end that is connected with described right-channel signals input, the 3rd end that connects with signal output part corresponding on described power amplifier module, right-channel signals is exported to described the 3rd end, the 4th end that is connected with right channel loudspeaker, the five terminal that is connected with described left channel signals input, the 6th end that connects with signal output part corresponding on described power amplifier module, right-channel signals is exported to described the 6th end, the 7th end that is connected with left channel loudspeaker; And when described earphone and headset plug plugged together, described the 3rd end and the 4th end disconnected, and the 6th end and the 7th end disconnect, when earphone and headset plug do not plug together, and described the 3rd end and the electrical connection of the 4th end, the 6th end and the electrical connection of the 7th end.
Preferably, described power amplifier module comprises that power of loudspeaker amplifies electronic circuit, described power of loudspeaker amplifies electronic circuit and comprises loud speaker left channel signals positive output end and loud speaker right-channel signals positive output end, described loud speaker left channel signals positive output end and described six end connecting, and be connected with described five terminal by the first resistance; Described loud speaker right-channel signals positive output end is connected with the 3rd end, and is connected with described the second end by the second resistance.
Preferably, described power of loudspeaker amplifies electronic circuit and also comprises loud speaker left channel signals negative output terminal and loud speaker right-channel signals negative output terminal, described loud speaker left channel signals negative output terminal is connected with left channel loudspeaker, and loud speaker R channel negative output terminal is connected with right channel loudspeaker.
Preferably, described power amplifier module comprises that power of loudspeaker amplifies electronic circuit and earphone power amplification electronic circuit, described power of loudspeaker amplifies electronic circuit and comprises loud speaker left channel signals positive output end and loud speaker right-channel signals positive output end, and earphone power amplification electronic circuit comprises earphone left channel signals output and earphone right-channel signals output; Described loud speaker left channel signals positive output end and described six end connecting, loud speaker right-channel signals positive output end is connected with described the 3rd end; Described earphone left channel signals output is connected with described five terminal, and earphone right-channel signals output is connected with described the second end.
Preferably, described power of loudspeaker amplifies electronic circuit and also comprises loud speaker left channel signals negative output terminal and loud speaker right-channel signals negative output terminal, described loud speaker left channel signals negative output terminal is connected with left channel loudspeaker, and loud speaker R channel negative output terminal is connected with right channel loudspeaker.
Preferably, described headset plug comprises left channel signals input, right-channel signals input and common ground end; Described loud speaker comprises left channel loudspeaker and right channel loudspeaker; Described headset plug comprises the first end that is connected with described common ground end, the second end that is connected with described right-channel signals input, the 3rd end that is connected with right channel loudspeaker, the 4th end, the five terminal that is connected with the left channel signals input, the 3rd end that is connected with left channel loudspeaker, and the 7th end; And when described earphone and headset plug plugged together, described the 3rd end and the 4th end disconnected, and the 6th end and the 7th end disconnect, when earphone and headset plug do not plug together, and described the 3rd end and the electrical connection of the 4th end, the 6th end and the electrical connection of the 7th end; Described power amplifier module is connected with right channel loudspeaker with described left channel loudspeaker, and to left channel loudspeaker, the output right-channel signals is to right channel loudspeaker with the output left channel signals.
Preferably, described power amplifier module comprises that power of loudspeaker amplifies electronic circuit and earphone power amplification electronic circuit, described power of loudspeaker amplifies electronic circuit and comprises loud speaker left channel signals positive output end and loud speaker right-channel signals positive output end, and earphone power amplification electronic circuit comprises earphone left channel signals output and earphone right-channel signals output; Described loud speaker left channel signals positive output end is connected with an end of left channel loudspeaker, the other end of this left channel loudspeaker and described six end connecting; The right-channel signals positive output end is connected with an end of right channel loudspeaker, and the other end of this right channel loudspeaker is connected with described the 3rd end; Earphone left channel signals output is connected with five terminal, and earphone right-channel signals output is connected with the second end; The 4th end of described headset plug all is connected with the common ground end with the 7th end.
Preferably, described power amplifier module comprises that power of loudspeaker amplifies electronic circuit and earphone power amplification electronic circuit, and described power of loudspeaker amplifies electronic circuit and comprises loud speaker left channel signals positive output end, loud speaker left channel signals negative output terminal, loud speaker right-channel signals positive output end and loud speaker right-channel signals negative output terminal; Earphone power amplification electronic circuit comprises earphone left channel signals output and earphone right-channel signals output; Described loud speaker left channel signals positive output end is connected with an end of left channel loudspeaker, and the other end of this left channel loudspeaker is connected with described the 7th end; Loud speaker right-channel signals positive output end is connected with an end of right channel loudspeaker, and the other end of this right channel loudspeaker is connected with described the 4th end; Earphone left channel signals output is connected with five terminal, and earphone right-channel signals output is connected with the second end; The 3rd end of described headset plug is connected with loud speaker right-channel signals negative output terminal, and the 6th end is connected with the left channel signals negative output terminal.
The utility model also provides a kind of television set, and this television set comprises the audio frequency output control circuit, and this audio frequency output control circuit comprises:
The audio frequency output module is used for output audio signal;
Power amplifier module amplifies described audio signal;
Headset plug is connected with earphone, and is connected with described power amplifier module with the connection status described earphone of control or the loud speaker of headset plug according to described earphone, and the audio signal after amplifying for power amplifier module exports earphone or loud speaker to.
Whether the utility model inserts in this headset plug by the headset plug Test earphone is set, and when earphone not during the plugged earphone plug, power amplifier module is connected with loud speaker by headset plug, after thereby the audio signal that makes the output of audio frequency output module is amplified through power amplifier module, export loud speaker to, carry out sound by loud speaker and play.When earphone plugged earphone plug, power amplifier module is connected with earphone by headset plug, thereby after making the audio signal of audio frequency output module output amplify through power amplifier module, exports earphone to, carries out sound by earphone and plays.Therefore, when the utility model can be realized earphone plugged earphone plug, quiet and earphone begins normal operation with loud speaker, has saved simultaneously the headset plugging testing circuit, thereby has reduced the cost of audio frequency output control circuit, more is conducive to industrial production.
Description of drawings
Fig. 1 is the structural representation of the utility model audio frequency output control circuit embodiment;
Fig. 2 is the circuit diagram of execution mode one in the utility model audio frequency output control circuit embodiment;
Fig. 3 is the circuit diagram of execution mode two in the utility model audio frequency output control circuit embodiment;
Fig. 4 is the circuit diagram of execution mode three in the utility model audio frequency output control circuit embodiment;
Fig. 5 is the circuit diagram of execution mode four in the utility model audio frequency output control circuit embodiment;
Fig. 6 is the circuit diagram of execution mode five in the utility model audio frequency output control circuit embodiment;
Fig. 7 is the circuit diagram of execution mode six in the utility model audio frequency output control circuit embodiment;
Fig. 8 is the circuit diagram of execution mode seven in the utility model audio frequency output control circuit embodiment.
The realization of the utility model purpose, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
With reference to Fig. 1, Fig. 1 is the structural representation of the utility model audio frequency output control circuit embodiment.The audio frequency output control circuit that the present embodiment provides comprises:
Audio frequency output module 10 is used for output audio signal;
Whether the utility model inserts in this headset plug 30 by headset plug 30 Test earphones are set, and when earphone not during plugged earphone plug 30, power amplifier module 20 is connected with loud speaker 40 by headset plug 30, after thereby the audio signal that makes 10 outputs of audio frequency output module is amplified through power amplifier module 20, export loud speaker 40 to, carry out sound by loud speaker 40 and play.When earphone plugged earphone plug 30, power amplifier module 20 is connected with earphone by headset plug 30, thereby after making the audio signal of audio frequency output module 10 outputs pass through power amplifier module 20 to amplify, exports earphone to, carries out the sound broadcast by earphone.Therefore, when the utility model can be realized earphone plugged earphone plug, quiet and earphone begins normal operation with loud speaker 40, has saved simultaneously the headset plugging testing circuit, thereby has reduced the cost of audio frequency output control circuit, more is conducive to industrial production.
In conjunction with reference to Fig. 2 to Fig. 4, Fig. 2 is the circuit diagram of execution mode one in the utility model audio frequency output control circuit embodiment, Fig. 3 is the circuit diagram of execution mode two in the utility model audio frequency output control circuit embodiment, and Fig. 4 is the circuit diagram of execution mode three in the utility model audio frequency output control circuit embodiment.In the present embodiment, above-mentioned headset plug 30 comprises left channel signals input, right-channel signals input and common ground end; Loud speaker 40 comprises left channel loudspeaker 401 and right channel loudspeaker 402; Headset plug 30 comprises the first end 31 that is connected with the common ground end, the second end 32 that is connected with the right-channel signals input, the 3rd end 33 that connects with signal output part corresponding on power amplifier module 20, right-channel signals is exported to the 3rd end 33, the 4th end 34 that is connected with right channel loudspeaker 402, the five terminal 35 that is connected with the left channel signals input, the 6th end 36 that connects with signal output part corresponding on power amplifier module 20, right-channel signals is exported to the 6th end 36, the 7th end 37 that is connected with left channel loudspeaker 401; And when earphone and headset plug 30 plug together, the 3rd end 33 and the 4th end 34 disconnect, and the 6th end 36 and the 7th end 37 disconnect, when earphone and headset plug 30 do not plug together, the 3rd end 33 and the 4th end 34 electrical connections, the 6th end 36 and the 7th end 37 electrical connections.
Be understandable that, above-mentioned power amplification circuit power output due to general loud speaker 40 is larger, and the power that earphone needs is less.Therefore power amplification circuit comprises and adopts two different power amplification circuits of power output or share same power amplification circuit, and power amplification circuit can adopt Single-end output or difference output simultaneously, below this is made a detailed description.
In execution mode 1, above-mentioned power amplifier module 20 comprises that power of loudspeaker amplifies electronic circuit 201, this power of loudspeaker amplifies electronic circuit 201 and comprises loud speaker left channel signals positive output end L+ and loud speaker right-channel signals positive output end R+, loud speaker left channel signals positive output end L+ is connected with the 6th end 36, and is connected with five terminal 35 by the first resistance R 1; Loud speaker right-channel signals positive output end R+ is connected with the 3rd end 33, and is connected with the second end 32 by the second resistance R 2.
In present embodiment, the transmission principle of audio signal is consistent, take left channel signals as example, the operation principle of circuit is described in detail.At first amplify electronic circuit 201 by audio frequency output module 10 output left channel signals to power of loudspeaker, amplify through this power of loudspeaker and export from loud speaker left channel signals positive output end L+ after electronic circuit 201 amplifies.When earphone not during plugged earphone plug 30, the 3rd end 33 and the 4th end 34 electrical connections, the 6th end 36 and the 7th end 37 electrical connections; This moment, above-mentioned left channel signals arrived left channel loudspeaker from loud speaker left channel signals positive output end L+ output through the 6th end 36, the 7th end 37 of headset plug 30, thereby by loud speaker 40 output sounds.When earphone and headset plug 30 plugged together, the 3rd end 33 and the 4th end 34 disconnected, and the 6th end 36 and the 7th end 37 disconnect; This moment, left channel signals arrived the five terminal 35 of headset plug 30 from loud speaker left channel signals positive output end L+ output through the first resistance R 1, and exported earphone to, thereby made loud speaker 40 quiet, the earphone output sound.
Further, in execution mode 2, when above-mentioned power of loudspeaker amplifies electronic circuit 201 employing differential amplification output, power of loudspeaker amplifies electronic circuit 201 and also comprises loud speaker left channel signals negative output terminal L-and loud speaker right-channel signals negative output terminal R-, loud speaker left channel signals negative output terminal L-is connected with left channel loudspeaker, and loud speaker R channel negative output terminal is connected with right channel loudspeaker.Its operation principle can not repeat them here with reference to aforementioned.
In execution mode 3, when 201 outputs of power amplification electronic circuit comprise DC component, also can be connected the first capacitor C 1 between the first resistance R 1 and loud speaker left channel signals positive output end, and an end of this first capacitor C 1 is connected with the first resistance R 1, the other end is connected with the 6th end 36; Be connected the second capacitor C 2 between the second resistance R 2 and right-channel signals positive output end, and an end of this second capacitor C 2 is connected with the second resistance R 2, the other end is connected with the 3rd end 33.
In conjunction with reference to Fig. 5 and Fig. 6, Fig. 5 is the circuit diagram of execution mode four in the utility model audio frequency output control circuit embodiment, and Fig. 6 is the circuit diagram of execution mode five in the utility model audio frequency output control circuit embodiment.In execution mode 4, above-mentioned power amplifier module 20 comprises that power of loudspeaker amplifies electronic circuit 201 and earphone power amplification electronic circuit 202, this power of loudspeaker amplifies electronic circuit 201 and comprises loud speaker left channel signals positive output end L+ and loud speaker right-channel signals positive output end R+, and earphone power amplification electronic circuit 202 comprises earphone left channel signals output L and earphone right-channel signals output R; Loud speaker left channel signals positive output end L+ is connected with the 6th end 36, and loud speaker right-channel signals positive output end R+ is connected with the 3rd end 33; Earphone left channel signals output L is connected with five terminal 35, and earphone right-channel signals output R is connected with the second end 32.
In present embodiment, the transmission principle of audio signal is consistent, take left channel signals as example, the operation principle of circuit is described in detail.At first amplify electronic circuit 201 and earphone power amplification electronic circuit 202 by audio frequency output module 10 output left channel signals to power of loudspeaker, amplify through this power of loudspeaker and export from loud speaker left channel signals positive output end L+ and earphone L channel output after electronic circuit 201 amplifies.When earphone not during plugged earphone plug 30, the 3rd end 33 and the 4th end 34 electrical connections, the 6th end 36 and the 7th end 37 electrical connections; This moment, above-mentioned left channel signals arrived left channel loudspeaker from loud speaker left channel signals positive output end L+ output through the 6th end 36, the 7th end 37 of headset plug 30, thereby by loud speaker 40 output sounds.When earphone and headset plug 30 plugged together, the 3rd end 33 and the 4th end 34 disconnected, and the 6th end 36 and the 7th end 37 disconnect; This moment, left channel signals exported the five terminal 35 of headset plug 30 to from earphone left channel signals output L, and exported earphone to, thereby made loud speaker 40 quiet, the earphone output sound.
Further, in execution mode 5, when above-mentioned power of loudspeaker amplifies electronic circuit 201 employing differential amplification output, above-mentioned power of loudspeaker amplifies electronic circuit 201 and also comprises loud speaker left channel signals negative output terminal L-and loud speaker right-channel signals negative output terminal R-, loud speaker left channel signals negative output terminal L-is connected with left channel loudspeaker, and loud speaker R channel negative output terminal is connected with right channel loudspeaker.In present embodiment, the operation principle of circuit can not repeat them here with reference to aforementioned.
In conjunction with reference to Fig. 7 and Fig. 8, Fig. 7 is the circuit diagram of execution mode six in the utility model audio frequency output control circuit embodiment, and Fig. 8 is the circuit diagram of execution mode seven in the utility model audio frequency output control circuit embodiment.In the present embodiment, earphone comprises left channel signals input, right-channel signals input and common ground end; Loud speaker 40 comprises left channel loudspeaker 401 and right channel loudspeaker 402; Headset plug 30 comprises the first end 31 that is connected with the common ground end, the second end 32 that is connected with the right-channel signals input, the 3rd end 33 that is connected with right channel loudspeaker, the 4th end 34, the five terminal 35 that is connected with the left channel signals input, the 6th end 36 that is connected with left channel loudspeaker, and the 7th end 37; And when earphone and headset plug 30 plug together, the 3rd end 33 and the 4th end 34 disconnect, and the 6th end 36 and the 7th end 37 disconnect, when earphone and headset plug 30 do not plug together, the 3rd end 33 and the 4th end 34 electrical connections, the 6th end 36 and the 7th end 37 electrical connections; Power amplifier module 20 is connected with right channel loudspeaker with left channel loudspeaker 401 and is connected, and to left channel loudspeaker 401, the output right-channel signals is to right channel loudspeaker 402 with the output left channel signals.
In execution mode 6, above-mentioned power amplifier module 20 comprises that power of loudspeaker amplifies electronic circuit 201 and earphone power amplification electronic circuit 202, power of loudspeaker amplifies electronic circuit 201 and comprises loud speaker left channel signals positive output end L+ and loud speaker right-channel signals positive output end R+, and earphone power amplification electronic circuit 202 comprises earphone left channel signals output L and earphone right-channel signals output R; Described loud speaker left channel signals positive output end L+ is connected with an end of left channel loudspeaker 401, and the other end of this left channel loudspeaker 401 is connected with the 6th end 36; The right-channel signals positive output end is connected with an end of right channel loudspeaker 402, and the other end of this right channel loudspeaker 402 is connected with the 3rd end 33; Earphone left channel signals output L is connected with five terminal 35, and earphone right-channel signals output R is connected with the second end 32; The 4th end 34 of headset plug 30 all is connected with the common ground end with the 7th end 37.
In present embodiment, the transmission principle of audio signal is consistent, take left channel signals as example, the operation principle of circuit is described in detail.At first amplify electronic circuit 201 and earphone power amplification electronic circuit 202 by audio frequency output module 10 output left channel signals to power of loudspeaker, amplify through this power of loudspeaker and export from loud speaker left channel signals positive output end L+ and earphone L channel output after electronic circuit 201 amplifies.When earphone not during plugged earphone plug 30, the 3rd end 33 and the 4th end 34 electrical connections, the 6th end 36 and the 7th end 37 electrical connections; This moment, above-mentioned left channel signals exported left channel loudspeaker 401 to from loud speaker left channel signals positive output end L+, and arrived the 7th ends 37 by the 6th end 36, namely returned to earth terminal, thereby consisted of the left channel signals loop, so loud speaker 40 output sounds.When earphone and headset plug 30 plugged together, the 3rd end 33 and the 4th end 34 disconnected, and the 6th end 36 and the 7th end 37 disconnect; This moment, left channel signals exported the five terminal 35 of headset plug 30 to from earphone left channel signals output L, and exported earphone to by this five terminal, thereby made loud speaker 40 quiet, the earphone output sound.
In real-time mode 7, above-mentioned power amplifier module 20 comprises that power of loudspeaker amplifies electronic circuit 201 and earphone power amplification electronic circuit 202, and power of loudspeaker amplifies electronic circuit 201 and comprises loud speaker left channel signals positive output end L+, loud speaker left channel signals negative output terminal L-, loud speaker right-channel signals positive output end R+ and loud speaker right-channel signals negative output terminal R-; Earphone power amplification electronic circuit 202 comprises earphone left channel signals output L and earphone right-channel signals output R; Loud speaker left channel signals positive output end L+ is connected with an end of left channel loudspeaker 401, and the other end of this left channel loudspeaker 401 is connected with the 7th end 37; Loud speaker right-channel signals positive output end R+ is connected with an end of right channel loudspeaker 402, and the other end of this right channel loudspeaker 402 is connected with the 4th end 34; Earphone left channel signals output L is connected with five terminal 35, and earphone right-channel signals output R is connected with the second end 32; The 3rd end 33 of headset plug 30 is connected with loud speaker right-channel signals negative output terminal R-, and the 6th end 36 is connected with the left channel signals negative output terminal.In present embodiment, the operation principle of circuit can not repeat them here with reference to aforementioned.
The utility model also provides a kind of television set, and this television set comprises the audio frequency output control circuit, and the structure of this audio frequency output control circuit and principle can with reference to above-described embodiment, not repeat them here.Natural, due to the audio frequency output control circuit technical scheme that adopts in above-described embodiment, so the television set that the present embodiment provides has all beneficial effects of above-mentioned audio frequency output control circuit.
These are only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.
Claims (10)
1. an audio frequency output control circuit, is characterized in that, comprising:
The audio frequency output module is used for output audio signal;
Power amplifier module amplifies described audio signal;
Headset plug is connected with earphone, and is connected with described power amplifier module with the connection status described earphone of control or the loud speaker of headset plug according to described earphone, and the audio signal after amplifying for power amplifier module exports earphone or loud speaker to.
2. audio frequency output control circuit as claimed in claim 1, is characterized in that, described headset plug comprises left channel signals input, right-channel signals input and common ground end; Described loud speaker comprises left channel loudspeaker and right channel loudspeaker; Described headset plug comprises the first end that is connected with described common ground end, the second end that is connected with described right-channel signals input, the 3rd end that connects with signal output part corresponding on described power amplifier module, right-channel signals is exported to described the 3rd end, the 4th end that is connected with right channel loudspeaker, the five terminal that is connected with described left channel signals input, the 6th end that connects with signal output part corresponding on described power amplifier module, right-channel signals is exported to described the 6th end, the 7th end that is connected with left channel loudspeaker; And when described earphone and headset plug plugged together, described the 3rd end and the 4th end disconnected, and the 6th end and the 7th end disconnect, when earphone and headset plug do not plug together, and described the 3rd end and the electrical connection of the 4th end, the 6th end and the electrical connection of the 7th end.
3. audio frequency output control circuit as claimed in claim 2, it is characterized in that, described power amplifier module comprises that power of loudspeaker amplifies electronic circuit, described power of loudspeaker amplifies electronic circuit and comprises loud speaker left channel signals positive output end and loud speaker right-channel signals positive output end, described loud speaker left channel signals positive output end and described six end connecting, and be connected with described five terminal by the first resistance; Described loud speaker right-channel signals positive output end is connected with the 3rd end, and is connected with described the second end by the second resistance.
4. audio frequency output control circuit as claimed in claim 3, it is characterized in that, described power of loudspeaker amplifies electronic circuit and also comprises loud speaker left channel signals negative output terminal and loud speaker right-channel signals negative output terminal, described loud speaker left channel signals negative output terminal is connected with left channel loudspeaker, and loud speaker R channel negative output terminal is connected with right channel loudspeaker.
5. audio frequency output control circuit as claimed in claim 2, it is characterized in that, described power amplifier module comprises that power of loudspeaker amplifies electronic circuit and earphone power amplification electronic circuit, described power of loudspeaker amplifies electronic circuit and comprises loud speaker left channel signals positive output end and loud speaker right-channel signals positive output end, and earphone power amplification electronic circuit comprises earphone left channel signals output and earphone right-channel signals output; Described loud speaker left channel signals positive output end and described six end connecting, loud speaker right-channel signals positive output end is connected with described the 3rd end; Described earphone left channel signals output is connected with described five terminal, and earphone right-channel signals output is connected with described the second end.
6. audio frequency output control circuit as claimed in claim 5, it is characterized in that, described power of loudspeaker amplifies electronic circuit and also comprises loud speaker left channel signals negative output terminal and loud speaker right-channel signals negative output terminal, described loud speaker left channel signals negative output terminal is connected with left channel loudspeaker, and loud speaker R channel negative output terminal is connected with right channel loudspeaker.
7. audio frequency output control circuit as claimed in claim 1, is characterized in that, described headset plug comprises left channel signals input, right-channel signals input and common ground end; Described loud speaker comprises left channel loudspeaker and right channel loudspeaker; Described headset plug comprises the first end that is connected with described common ground end, the second end that is connected with described right-channel signals input, the 3rd end that is connected with right channel loudspeaker, the 4th end, the five terminal that is connected with the left channel signals input, the 3rd end that is connected with left channel loudspeaker, and the 7th end; And when described earphone and headset plug plugged together, described the 3rd end and the 4th end disconnected, and the 6th end and the 7th end disconnect, when earphone and headset plug do not plug together, and described the 3rd end and the electrical connection of the 4th end, the 6th end and the electrical connection of the 7th end; Described power amplifier module is connected with right channel loudspeaker with described left channel loudspeaker, and to left channel loudspeaker, the output right-channel signals is to right channel loudspeaker with the output left channel signals.
8. audio frequency output control circuit as claimed in claim 7, it is characterized in that, described power amplifier module comprises that power of loudspeaker amplifies electronic circuit and earphone power amplification electronic circuit, described power of loudspeaker amplifies electronic circuit and comprises loud speaker left channel signals positive output end and loud speaker right-channel signals positive output end, and earphone power amplification electronic circuit comprises earphone left channel signals output and earphone right-channel signals output; Described loud speaker left channel signals positive output end is connected with an end of left channel loudspeaker, the other end of this left channel loudspeaker and described six end connecting; The right-channel signals positive output end is connected with an end of right channel loudspeaker, and the other end of this right channel loudspeaker is connected with described the 3rd end; Earphone left channel signals output is connected with five terminal, and earphone right-channel signals output is connected with the second end; The 4th end of described headset plug all is connected with the common ground end with the 7th end.
9. audio frequency output control circuit as claimed in claim 7, it is characterized in that, described power amplifier module comprises that power of loudspeaker amplifies electronic circuit and earphone power amplification electronic circuit, and described power of loudspeaker amplifies electronic circuit and comprises loud speaker left channel signals positive output end, loud speaker left channel signals negative output terminal, loud speaker right-channel signals positive output end and loud speaker right-channel signals negative output terminal; Earphone power amplification electronic circuit comprises earphone left channel signals output and earphone right-channel signals output; Described loud speaker left channel signals positive output end is connected with an end of left channel loudspeaker, and the other end of this left channel loudspeaker is connected with described the 7th end; Loud speaker right-channel signals positive output end is connected with an end of right channel loudspeaker, and the other end of this right channel loudspeaker is connected with described the 4th end; Earphone left channel signals output is connected with five terminal, and earphone right-channel signals output is connected with the second end; The 3rd end of described headset plug is connected with loud speaker right-channel signals negative output terminal, and the 6th end is connected with the left channel signals negative output terminal.
10. a television set, is characterized in that, comprises as audio frequency output control circuit as described in any one in claim 1 to 9.
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|---|---|---|---|
| CN 201220590052 CN203027365U (en) | 2012-11-09 | 2012-11-09 | Audio output control circuit and TV set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220590052 CN203027365U (en) | 2012-11-09 | 2012-11-09 | Audio output control circuit and TV set |
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| CN 201220590052 Expired - Lifetime CN203027365U (en) | 2012-11-09 | 2012-11-09 | Audio output control circuit and TV set |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103544958A (en) * | 2013-11-04 | 2014-01-29 | 深圳Tcl新技术有限公司 | Method and device for controlling voice-frequency howling during switching of voice-frequency output |
| CN114554351A (en) * | 2022-01-28 | 2022-05-27 | 歌尔科技有限公司 | Audio transmission circuit, audio transmission method and electronic equipment |
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2012
- 2012-11-09 CN CN 201220590052 patent/CN203027365U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103544958A (en) * | 2013-11-04 | 2014-01-29 | 深圳Tcl新技术有限公司 | Method and device for controlling voice-frequency howling during switching of voice-frequency output |
| CN114554351A (en) * | 2022-01-28 | 2022-05-27 | 歌尔科技有限公司 | Audio transmission circuit, audio transmission method and electronic equipment |
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