CN109889953A - Sound equipment and its audio signal and microphone signal input control circuit - Google Patents
Sound equipment and its audio signal and microphone signal input control circuit Download PDFInfo
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- CN109889953A CN109889953A CN201910174707.7A CN201910174707A CN109889953A CN 109889953 A CN109889953 A CN 109889953A CN 201910174707 A CN201910174707 A CN 201910174707A CN 109889953 A CN109889953 A CN 109889953A
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- signal input
- control circuit
- audio signal
- microphone
- input control
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Abstract
The present invention relates to a kind of audio signals and microphone signal input control circuit, the audio signal and microphone signal input control circuit include CPU, the detection circuit for detecting input signal types, microphone signal input control circuit and audio signal input circuit, the detection circuit, the microphone signal input control circuit, the audio signal input circuit are all connect with the CPU, and the CPU controls the input of microphone signal or audio signal according to the input signal types that the detection circuit detects.Audio signal and microphone signal input control circuit of the invention can realize the input of audio signal and microphone signal by an interface.The invention further relates to a kind of sound equipment, which includes aforementioned audio signal and microphone signal input control circuit.
Description
Technical field
The present invention relates to a kind of circuit more particularly to a kind of audio signal and microphone signal input control circuits.
Background technique
With the improvement of living standards, stereo set is more more and more universal.Current sound equipment is equipped with audio interface and Mike
Wind interface, to realize the input of audio signal and microphone signal.Large-scale stereo set volume is larger, there is enough spaces
Audio interface and microphone interface are set simultaneously.But the smart bluetooth sound equipment of some small volumes, may be not enough
Audio interface and microphone interface is respectively set in space.Also, interface is more, also will affect the beauty of Bluetooth audio device,
Cost is also higher.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of audio signals and microphone signal input control circuit.
In order to solve the above technical problems, audio signal and microphone signal input control circuit of the invention, including
CPU, the detection circuit for detecting input signal types, microphone signal input control circuit and audio signal input electricity
Road, the detection circuit, the microphone signal input control circuit, the audio signal input circuit all connect with the CPU
Connect, input signal types control microphone signal that the CPU is detected according to the detection circuit or audio signal it is defeated
Enter
Preferably, the audio signal and microphone signal input control circuit further include interface, the detection circuit
It is connect with the interface, the type of plug for the insertion interface that the CPU is detected according to the detection circuit judges
Input signal types.
Preferably, the interface includes the first inserting foot, the second inserting foot and grounding leg, and the CPU is according to the inspection
Inserting for the interface is inserted into the level signal judgement for first inserting foot and second inserting foot that slowdown monitoring circuit detects
Head type.
Preferably, the detection circuit includes the first detection branch for detecting the level signal of first inserting foot
With the second detection branch of the level signal for detecting second inserting foot, wherein one end of first detection branch with
First inserting foot connection, the other end of first detection branch are connect with the CPU, second detection branch its
Middle one end is connect with second inserting foot, and the other end of second detection branch is connect with the CPU.
Preferably, when the type of plug for being inserted into the interface is microphone plug, the microphone plug makes described
First inserting foot and the second inserting foot are all connected with the grounding leg, when the type of plug for being inserted into the interface is audio jack
When, first inserting foot is connected with the grounding leg in the audio jack.
Preferably, first detection branch includes first resistor, and one end of the first resistor is connect with the CPU,
The other end of the first resistor is connect with first inserting foot.
Preferably, second detection branch includes second resistance, and one end of the second resistance is connect with the CPU,
The other end of the second resistance is connect with second inserting foot.
Preferably, the microphone signal input control circuit includes switch, and the CPU is by controlling opening for the switch
The input opened and close control microphone signal.
Preferably, the switch is metal-oxide-semiconductor.
The invention further relates to a kind of sound equipment, the sound equipment includes audio signal described in aforementioned any one and Mike's wind
Number input control circuit.
Audio signal and microphone signal input control circuit of the invention can realize audio letter by an interface
Number and microphone signal input.
Detailed description of the invention
Fig. 1 is the circuit diagram of audio signal of the present invention and microphone signal input control circuit；
Fig. 2 is the schematic diagram of the interface of audio signal of the present invention and microphone signal input control circuit；
Fig. 3 is a kind of schematic diagram of microphone plug；
Fig. 4 is a kind of schematic diagram of audio jack.
Specific embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As shown in Figure 1, the audio signal and microphone signal input control circuit of the present embodiment include CPUU1, for examining
Survey detection circuit, microphone signal input control circuit and the audio signal input circuit of input signal types, the detection
Circuit, the microphone signal input control circuit, the audio signal input circuit are all connect with the CPU U1, described
CPU U1 controls the input of microphone signal or audio signal according to the input signal types that the detection circuit detects.I.e.
When the input signal that the detection circuit detects is microphone signal, microphone signal input control circuit conducting with
Just the input of microphone signal, audio signal input circuit is closed at this time；When the input signal that the detection circuit detects is
When audio signal, the CPU controls audio signal and inputs from audio signal input circuit, at this time microphone signal input control electricity
Road is closed.In the present embodiment, the model 6921A of the CPU U1, naturally it is also possible to select other models as needed
CPU。
The audio signal and microphone signal input control circuit further include interface J.The detection circuit with it is described
Interface J connection, the type of plug judgement input for the insertion interface J that the CPU is detected according to the detection circuit
Signal type.As shown in Fig. 2, the interface J includes the first inserting foot J1, the second inserting foot J2, third inserting foot J3 and connects
Lower margin J4.The level of the first inserting foot J1 and the second inserting foot J2 that the CPU U1 is detected according to the detection circuit
The type of plug of the interface J is inserted into signal judgement, and then judges input signal types.In embodiment, the interface J
Model PJ-320D.It is of course also possible to select other suitable interface types.
In the present embodiment, the detection circuit includes first for detecting the level signal of the first inserting foot J1
Second detection branch of detection branch and the level signal for detecting the second inserting foot J2, first detection branch
Wherein one end is connect with the first inserting foot J1, and the port 31 of the other end of first detection branch and the CPU U1 connect
It connects, wherein one end of second detection branch is connect with the second inserting foot J2, the other end of second detection branch
It is connect with the port 30 of the CPU U1.In the present embodiment, first detection branch includes first resistor R12, and described
Wherein one end of one resistance R12 is connect with the first inserting foot J1, the other end of the first resistor R12 and the CPU U1
Port 31 connect.Second detection branch includes second resistance R2, wherein one end of the second resistance R2 and described the
Two inserting foot J2 connections, the other end of the second resistance R2 are connect with the port 30 of the CPU U1.
The type of plug judgement input letter for the insertion interface J that the CPU U1 is detected according to the detection circuit
Number type.The the first inserting foot J1 for the interface J that the CPU is detected according to the detection circuit and the second grafting
The type of plug of the interface J is inserted into the level signal judgement of foot J2, and then judges the type of input signal.In conjunction with Fig. 1, figure
Shown in 2 and Fig. 3, when being inserted into microphone plug, the outer ring end M1 of the microphone plug is simultaneously and described in the interface J
First inserting foot J1, the second inserting foot J2 and grounding leg J4 contact, to make the first inserting foot J1 and the second inserting foot J2
All being connected with grounding leg J4, it is in low level that the CPU U1, which detects the first inserting foot J1 and the second inserting foot J2 to be,
And then CPU U1 determines that being inserted into the type of plug of the interface J is microphone plug, and then determines that input signal types are wheat
Gram wind number, to make the conducting of microphone signal input control circuit so as to the input of microphone signal, audio signal is defeated at this time
Enter circuit then to close.In conjunction with shown in Fig. 1, Fig. 2 and Fig. 4, when being inserted into audio jack, the outer ring end Y1 of the audio jack and institute
The first inserting foot J1 and grounding leg the J4 contact for stating interface J, so that the first inserting foot J1 and grounding leg J4 be made to lead
It is logical, and the second inserting foot J2 and grounding leg J4 is not turned on, the CPU U1 detects that the first inserting foot J1 is low electricity
It is flat, and the CPU U1 detects that the second inserting foot J2 is in high level, and then CPU U1 determines to be inserted into the interface J's
Type of plug is audio jack, and then determines that input signal types are audio signal, so that audio signal input circuit be made to be connected
So as to the input of audio signal, microphone signal input control circuit is then closed at this time.It should be noted that sound shown in figure
Frequency plug is only one of audio jack, can also be other kinds of audio jack.Microphone plug shown in figure
Only one of microphone plug, can also be other kinds of microphone plug.When audio jack and microphone plug
Type variation when, select other kinds of interface matching, and make the connection of detection circuit and interface close
It is that adjustment appropriate is made in design according to the present invention.These are all designs according to the present invention, are made to the present embodiment
Simple transformation, all within protection scope of the present invention
In the present embodiment, the audio signal input circuit includes that left audio signal input circuit and right audio signal are defeated
Enter circuit.As shown in Figure 1, the left audio signal input circuit includes the capacitor C4 being serially connected and capacitor C18, the capacitor
One end of C4 is connect with the second inserting foot J2 of interface J, and the other end of capacitor C4 is connect with one end of capacitor C18, the electricity
The other end for holding C18 is connect with the port 33 of CPU U1.The left audio signal input circuit further includes resistance R50, resistance R50
One end ground connection, the other end connect with capacitor C4 and capacitor C18.The resistance R50 is for weakening left audio signal input circuit
The intensity of input signal.As shown in Figure 1, the right audio signal input circuit includes the capacitor C5 and capacitor C19 being serially connected,
One end of the capacitor C5 is connect with the third inserting foot J3 of interface J, and the other end of capacitor C5 and one end of capacitor C19 connect
It connects, the other end of the capacitor C19 is connect with the port 32 of CPU U1.The right audio signal input circuit further includes resistance
One end of R49, resistance R49 are grounded, and the other end is connect with capacitor C5 and capacitor C19.The resistance R49 is for weakening right audio letter
The intensity of number input circuit input signal.The audio signal input circuit should be readily appreciated that those skilled in the art
, this will not be repeated here for working principle.
In the present embodiment, the microphone signal input control circuit includes switch, and the CPU described in control by opening
The input of the open and close control microphone signal of pass.Specifically, the switch is metal-oxide-semiconductor Q, and the Q1 foot of the metal-oxide-semiconductor Q connects
It is connected to the port 34 of the CPU U1, the Q2 foot of the metal-oxide-semiconductor Q is connected to the port 38 of the CPU U1.The metal-oxide-semiconductor Q's
Q3 foot is connected to the third inserting foot J3 of the interface J through resistance R6.The microphone signal input control circuit further includes
Capacitor C7, the other end that one end of capacitor C7 connects third the inserting foot J3, capacitor C7 of the interface J connect the CPU U1
Port 41.The microphone signal input control circuit further includes resistance R5, the Q1 of one end of resistance R5 and the metal-oxide-semiconductor Q
Foot connection, the other end of resistance R5 are connect with the Q2 foot of the metal-oxide-semiconductor Q.The microphone signal input control circuit further includes
The one end capacitor C6, capacitor C6 is connected to the Q3 foot of the metal-oxide-semiconductor Q, capacitor C6 other end ground connection, and capacitor C6 plays filter action.
When CPU U1 detects microphone plug insertion by detection circuit, the CPU U1 issues control letter by its port 34
Number, metal-oxide-semiconductor Q is connected, to be powered to microphone, and then third inserting foot J3, electricity of the microphone signal through interface J
Hold C7 and enters CPU U1.
The type of plug for being inserted into the interface J is detected by setting detection circuit, and then controls microphone signal input
Control circuit and audio signal input circuit are switched on or off, can be realized by an interface microphone signal and
The input of audio signal.
The invention further relates to a kind of sound equipment, the sound equipment includes audio signal above-mentioned and microphone signal input control electricity
Road.Certainly, the circuit part of sound equipment is according to its concrete function, in addition to including audio signal above-mentioned and microphone signal input control
It can also include key control module, signal amplification module etc., these circuit modules of sound equipment are all this fields outside circuit processed
Common sense, this will not be repeated here.
Audio signal and microphone signal input control circuit of the invention can realize audio letter by an interface
Number and microphone signal input.
Certainly, audio signal of the invention and microphone signal input control circuit can also be applied to video machine etc..
As described above, only presently preferred embodiments of the present invention, practical range not for the purpose of limiting the invention, i.e.,
It is all according to equivalent changes and modifications made by the present invention, be all that scope of the invention as claimed is covered, no longer illustrate one by one here.
Claims (10)
1. a kind of audio signal and microphone signal input control circuit, including CPU, the detection for detecting input signal types
Circuit, microphone signal input control circuit and audio signal input circuit, the detection circuit, the microphone signal are defeated
Enter control circuit, the audio signal input circuit is all connect with the CPU, the CPU is detected according to the detection circuit
Input signal types control microphone signal or audio signal input.
2. audio signal according to claim 1 and microphone signal input control circuit, which is characterized in that the audio
Signal and microphone signal input control circuit further include interface, and the detection circuit is connect with the interface, the CPU
The type of plug of the insertion interface detected according to the detection circuit judges input signal types.
3. audio signal according to claim 2 and microphone signal input control circuit, which is characterized in that the grafting
Mouth includes the first inserting foot, the second inserting foot and grounding leg, and the CPU is inserted according to described first that the detection circuit detects
The type of plug of the interface is inserted into the judgement of the level signal of pin and second inserting foot.
4. audio signal according to claim 3 and microphone signal input control circuit, which is characterized in that the detection
Circuit includes the first detection branch for detecting the level signal of first inserting foot and for detecting second grafting
Second detection branch of the level signal of foot, wherein one end of first detection branch are connect with first inserting foot, institute
The other end for stating the first detection branch is connect with the CPU, wherein one end of second detection branch and second grafting
Foot connection, the other end of second detection branch are connect with the CPU.
5. audio signal according to claim 4 and microphone signal input control circuit, which is characterized in that when insertion institute
When the type of plug for stating interface is microphone plug, the microphone plug makes first inserting foot and the second inserting foot all
It is connected with the grounding leg, when the type of plug for being inserted into the interface is audio jack, the audio jack makes described the
One inserting foot is connected with the grounding leg.
6. audio signal according to claim 4 and microphone signal input control circuit, which is characterized in that described first
Detection branch includes first resistor, and one end of the first resistor is connect with the CPU, the other end of the first resistor and institute
State the connection of the first inserting foot.
7. audio signal according to claim 4 and microphone signal input control circuit, which is characterized in that described second
Detection branch includes second resistance, and one end of the second resistance is connect with the CPU, the other end of the second resistance and institute
State the connection of the second inserting foot.
8. audio signal according to claim 1 and microphone signal input control circuit, which is characterized in that the Mike
Wind signal input control circuit includes switch, and the CPU described in control by switching on and closing control microphone signal
Input.
9. audio signal according to claim 8 and microphone signal input control circuit, which is characterized in that the switch
For metal-oxide-semiconductor.
10. a kind of sound equipment, which is characterized in that the sound equipment include audio signal described in any one of claim 1 to 9 and
Microphone signal input control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910174707.7A CN109889953A (en) | 2019-03-08 | 2019-03-08 | Sound equipment and its audio signal and microphone signal input control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910174707.7A CN109889953A (en) | 2019-03-08 | 2019-03-08 | Sound equipment and its audio signal and microphone signal input control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109889953A true CN109889953A (en) | 2019-06-14 |
Family
ID=66931310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910174707.7A Pending CN109889953A (en) | 2019-03-08 | 2019-03-08 | Sound equipment and its audio signal and microphone signal input control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109889953A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004328419A (en) * | 2003-04-25 | 2004-11-18 | Sony Corp | Acoustic signal input and output unit, switching method of input and output circuit |
| KR20060005810A (en) * | 2004-07-14 | 2006-01-18 | 주식회사 팬택앤큐리텔 | System for detecting connection |
| CN102638745A (en) * | 2012-04-09 | 2012-08-15 | 广东步步高电子工业有限公司 | Earphone compatible method and system for terminal equipment and interface circuit of terminal equipment |
| CN103686535A (en) * | 2013-12-02 | 2014-03-26 | Tcl集团股份有限公司 | Terminal capable of automatically recognizing headset microphone and karaoke devices, and recognition method thereof |
| CN104105046A (en) * | 2013-04-09 | 2014-10-15 | 宏碁股份有限公司 | Detection circuit |
-
2019
- 2019-03-08 CN CN201910174707.7A patent/CN109889953A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004328419A (en) * | 2003-04-25 | 2004-11-18 | Sony Corp | Acoustic signal input and output unit, switching method of input and output circuit |
| KR20060005810A (en) * | 2004-07-14 | 2006-01-18 | 주식회사 팬택앤큐리텔 | System for detecting connection |
| CN102638745A (en) * | 2012-04-09 | 2012-08-15 | 广东步步高电子工业有限公司 | Earphone compatible method and system for terminal equipment and interface circuit of terminal equipment |
| CN104105046A (en) * | 2013-04-09 | 2014-10-15 | 宏碁股份有限公司 | Detection circuit |
| CN103686535A (en) * | 2013-12-02 | 2014-03-26 | Tcl集团股份有限公司 | Terminal capable of automatically recognizing headset microphone and karaoke devices, and recognition method thereof |
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