CN209002204U - A kind of earphone switching circuit - Google Patents
A kind of earphone switching circuit Download PDFInfo
- Publication number
- CN209002204U CN209002204U CN201821903098.1U CN201821903098U CN209002204U CN 209002204 U CN209002204 U CN 209002204U CN 201821903098 U CN201821903098 U CN 201821903098U CN 209002204 U CN209002204 U CN 209002204U
- Authority
- CN
- China
- Prior art keywords
- field
- effect tube
- analog switch
- connect
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model relates to a kind of earphone switching circuit, including analog switch, analog switch is connected with the first field-effect tube and the second field-effect tube and third field-effect tube, and the first field-effect tube is connected with audio socket, and third field-effect tube is also connect with audio socket；The microprocessor of the end EN of analog switch and equipment is connected, realize the on-off for passing through software control analog switch, or the on-off using hardware controls analog switch is connect with control switch, pass through the first field-effect tube and the second field-effect tube that connect with analog switch and the third field-effect tube connecting with the second field-effect tube, the line sequence connecting with the end MIC of audio socket and the end AGND is interchangeable by realization, it connect the end COM of analog switch with the signal wire MIC of earphone always, the ground line GND of earphone is grounded always, and then realize that an audio socket meets OMTP standard simultaneously and the earphone of OTIA standard uses；Circuit is simple, at low cost, small in size, applied widely.
Description
Technical field
The utility model relates to ear phone technology fields, more specifically to a kind of earphone switching circuit.
Background technique
As people's lives level is continuously improved, for people to mobile phone, the demand of plate, notebook is increasing, existing
Earphone interface standard be divided into two classes, one kind is Chinese Industrial Standards (CIS) OMTP, and another kind of is international standard CTIA；It is deposited between two kinds of standards
It can not achieve in difference general, so that often because of the difference of earphone interface standard when using different equipment, and need to purchase
The earphone of another standard is bought, use is extremely inconvenient, while also having accordingly increased use cost.
Utility model content
The technical problem to be solved by the present invention is in view of the above drawbacks of the prior art, provide a kind of circuit letter
Single, at low cost, small in size, applied widely earphone switching circuit.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
Construct a kind of earphone switching circuit, including analog switch；Wherein, the analog switch is connected with the first field-effect tube
With the second field-effect tube and third field-effect tube, first field-effect tube is connected with audio socket, the third field-effect
Pipe is also connect with the audio socket；The grid of first field-effect tube and second field-effect tube is opened with the simulation
The end EN of pass connects, and the end EN of the analog switch is also connected with control switch or connect with the microprocessor of equipment.
Earphone switching circuit described in the utility model, wherein the end EN of the analog switch is also connected with first resistor,
The other end of the first resistor is grounded or connect with the anode of power supply；The drain electrode of first field-effect tube is opened with the simulation
The end NC of pass connects, the source electrode ground connection of first field-effect tube；The drain electrode of second field-effect tube is connected with second resistance,
The anode of the other end of the second resistance and the power supply is connect, the drain electrode of second field-effect tube also with the third field
The grid of effect pipe connects；The drain electrode of the third field-effect tube is connect with the end NO of the analog switch, the third field effect
Should pipe source electrode ground connection；The end NO of the analog switch is also connect with the end AGND of the audio socket, the analog switch
The end NC is also connect with the end MIC of the audio socket.
Earphone switching circuit described in the utility model, wherein the earphone switching circuit further includes audio frequency power amplifier chip,
The end LIN2 of the audio frequency power amplifier chip is connected with first capacitor, the other end of the first capacitor and the analog switch
The connection of the end COM；The end LOUT2 of the analog switch is also connected with the second capacitor, and the other end of second capacitor is connected with
Three capacitors and 3rd resistor, the other end of the third capacitor are connected with the 4th resistance, and the other end of the 4th resistance is grounded,
The other end of the 3rd resistor is connect with the end LEFT of the audio socket；The end ROUT2 of the analog switch is connected with
Four capacitors, the other end of the 4th capacitor are connected with the 5th capacitor and the 5th resistance, the other end connection of the 5th capacitor
There are the 6th resistance, the other end ground connection of the 6th resistance, the other end of the 5th resistance and the RIGTH of the audio socket
End connection.
Earphone switching circuit described in the utility model, wherein the other end of the 3rd resistor is also connected with first pair
To diode, the other end of first bilateral diode is grounded, and it is two-way that the other end of the 5th resistance is also connected with second
Diode, the other end ground connection of second bilateral diode.
The utility model has the beneficial effects that: the microprocessor of the end EN of analog switch and equipment is connected, realize logical
Cross the on-off of software control analog switch, or connect with control switch the on-off using hardware controls analog switch, by with
The first field-effect tube and the second field-effect tube of analog switch connection and the third field-effect tube being connect with the second field-effect tube,
The line sequence connecting with the end MIC of audio socket and the end AGND is interchangeable by realization, make the end COM of analog switch always with earphone
Signal wire MIC connection, the ground line GND of earphone is grounded always, and then realizes that an audio socket meets OMTP standard simultaneously
It is used with the earphone of OTIA standard；Circuit is simple, at low cost, easy to use, applied widely.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below in conjunction with attached drawing and reality
Applying example, the utility model is described in further detail, and the accompanying drawings in the following description is only section Example of the invention, for this
For the those of ordinary skill of field, without creative efforts, it is attached to can also be obtained according to these attached drawings other
Figure:
Fig. 1 is the analog switching circuit figure of the earphone switching circuit of the utility model preferred embodiment；
Fig. 2 is the circuit diagram of the first field-effect tube of the earphone switching circuit of the utility model preferred embodiment；
Fig. 3 is the second field-effect tube and third field-effect tube of the earphone switching circuit of the utility model preferred embodiment
Circuit diagram；
Fig. 4 is the circuit diagram of the audio socket of the earphone switching circuit of the utility model preferred embodiment；
Fig. 5 is the circuit diagram of the audio frequency power amplifier chip of the earphone switching circuit of the utility model preferred embodiment.
Specific embodiment
It is practical below in conjunction with this in order to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Technical solution in new embodiment carries out clear, complete description, it is clear that described embodiment is the portion of the utility model
Point embodiment, rather than whole embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art are not paying creation
Property labour under the premise of every other embodiment obtained, belong to the protection scope of the utility model.
The earphone switching circuit of the utility model preferred embodiment is as shown in Figure 1, simultaneously referring to Fig.2, Fig. 3, Fig. 4 and figure
5, including analog switch U1, analog switch U1 be connected with the first field-effect tube Q1 and the second field-effect tube Q2 and third field-effect
Pipe Q3, the first field-effect tube Q1 are connected with audio socket J1, and third field-effect tube Q3 is also connect with audio socket J1；First effect
Should the grid of pipe Q1 and the second field-effect tube Q2 connect with the end EN of analog switch U1, the end EN of analog switch U1 is also connected with
Control switch (not shown) is connect with the microprocessor (not shown) of equipment；By the end EN of analog switch U1 with set
Standby microprocessor connection, realizes the on-off for passing through software control analog switch U1, or connect with control switch and use hardware
The on-off for controlling analog switch U1, by the first field-effect tube Q1 and the second field-effect tube Q2 that are connect with analog switch U1 and
The third field-effect tube Q3 connecting with the second field-effect tube Q2, realizing will connect with the end MIC of audio socket J1 and the end AGND
Line sequence is interchangeable, and connect the end COM of analog switch U1 with the signal wire MIC of earphone always, the ground line GND of earphone is always
Ground connection, and then realize that an audio socket J1 meets OMTP standard simultaneously and the earphone of OTIA standard uses；Circuit is simple, cost
It is low, it is small in size, it is applied widely.
As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the end EN of analog switch U1 is also connected with first resistor R1, first resistor
The other end of R1 is grounded or connect with the anode of power supply, setting default on-off；The drain electrode of first field-effect tube Q1 and analog switch
The end NC of U1 connects, the source electrode ground connection of the first field-effect tube Q1；The drain electrode of second field-effect tube Q2 is connected with second resistance R2, the
The other end of two resistance R2 and the anode of power supply connect, grid of the drain electrode of the second field-effect tube Q2 also with third field-effect tube Q3
Connection；The drain electrode of third field-effect tube Q3 is connect with the end NO of analog switch U1, the source electrode ground connection of third field-effect tube Q3；Simulation
The end NO of switch U1 is also connect with the end AGND of audio socket J1, the end NC of analog switch U1 also with the end MIC of audio socket J1
Connection；Circuit is simple, at low cost, small in size.
As shown in Fig. 1 and Fig. 4 and Fig. 5, earphone switching circuit further includes audio frequency power amplifier chip U2, audio frequency power amplifier chip U2
The end LIN2 be connected with first capacitor C1, the other end of first capacitor C1 is connect with the end COM of analog switch U1；Analog switch U1
The end LOUT2 be also connected with the second capacitor C2, the other end of the second capacitor C2 is connected with third capacitor C3 and 3rd resistor R3,
The other end of three capacitor C2 is connected with the 4th resistance R4, the other end ground connection of the 4th resistance R4, the other end of 3rd resistor R3 with
The end LEFT of audio socket J1 connects；The end ROUT2 of analog switch U1 is connected with the 4th capacitor C4, the other end of the 4th capacitor C4
It is connected with the 5th capacitor C5 and the 5th resistance R5, the other end of the 5th capacitor C5 is connected with the 6th resistance R6, the 6th resistance R6's
Other end ground connection, the other end of the 5th resistance R5 are connect with the end RIGTH of audio socket J1；Circuit is simple, improves sound quality.
As shown in figure 5, the other end of 3rd resistor is also connected with the first bilateral diode, the first bilateral diode it is another
End ground connection, the other end of the 5th resistance are also connected with the second bilateral diode, the other end ground connection of the second bilateral diode；For sound
Frequency power amplifier chips U2 provides protection, and circuit is simple, at low cost.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations all should belong to the protection scope of the appended claims for the utility model.
Claims (4)
1. a kind of earphone switching circuit, including analog switch；It is characterized in that, the analog switch is connected with the first field-effect tube
With the second field-effect tube and third field-effect tube, first field-effect tube is connected with audio socket, the third field-effect
Pipe is also connect with the audio socket；The grid of first field-effect tube and second field-effect tube is opened with the simulation
The end EN of pass connects, and the end EN of the analog switch is also connected with control switch or connect with the microprocessor of equipment.
2. earphone switching circuit according to claim 1, which is characterized in that the end EN of the analog switch is also connected with
The other end of one resistance, the first resistor is grounded or connect with the anode of power supply；The drain electrode of first field-effect tube and institute
State the end the NC connection of analog switch, the source electrode ground connection of first field-effect tube；The drain electrode of second field-effect tube is connected with
The anode of second resistance, the other end of the second resistance and the power supply is connect, the drain electrode of second field-effect tube also with
The grid of the third field-effect tube connects；The drain electrode of the third field-effect tube is connect with the end NO of the analog switch, institute
State the source electrode ground connection of third field-effect tube；The end NO of the analog switch is also connect with the end AGND of the audio socket, described
The end NC of analog switch is also connect with the end MIC of the audio socket.
3. earphone switching circuit according to claim 1, which is characterized in that the earphone switching circuit further includes audio function
Chip is put, the end LIN2 of the audio frequency power amplifier chip is connected with first capacitor, the other end of the first capacitor and the simulation
The end COM of switch connects；The end LOUT2 of the analog switch is also connected with the second capacitor, and the other end of second capacitor connects
Be connected to third capacitor and 3rd resistor, the other end of the third capacitor is connected with the 4th resistance, the 4th resistance it is another
End ground connection, the other end of the 3rd resistor are connect with the end LEFT of the audio socket；The end ROUT2 of the analog switch connects
Be connected to the 4th capacitor, the other end of the 4th capacitor is connected with the 5th capacitor and the 5th resistance, the 5th capacitor it is another
End is connected with the 6th resistance, the other end ground connection of the 6th resistance, the other end and the audio socket of the 5th resistance
The end RIGTH connection.
4. earphone switching circuit according to claim 3, which is characterized in that the other end of the 3rd resistor is also connected with
First bilateral diode, the other end ground connection of first bilateral diode, the other end of the 5th resistance are also connected with the
Two bilateral diodes, the other end ground connection of second bilateral diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821903098.1U CN209002204U (en) | 2018-11-19 | 2018-11-19 | A kind of earphone switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821903098.1U CN209002204U (en) | 2018-11-19 | 2018-11-19 | A kind of earphone switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209002204U true CN209002204U (en) | 2019-06-18 |
Family
ID=66807742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821903098.1U Active CN209002204U (en) | 2018-11-19 | 2018-11-19 | A kind of earphone switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209002204U (en) |
-
2018
- 2018-11-19 CN CN201821903098.1U patent/CN209002204U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208675514U (en) | A kind of frequency switch circuit and electronic equipment | |
| CN105045185A (en) | Buzzer volume control apparatus and method for controlling buzzer volume by using the same, and household appliance | |
| CN209002204U (en) | A kind of earphone switching circuit | |
| CN207354224U (en) | Power amplification circuit for speaker of voice box | |
| CN203278752U (en) | Dynamic amplitude limiting protector of audio power amplifier | |
| CN202856809U (en) | Mobile terminal for mobile phone | |
| CN201216024Y (en) | Microphone set device having chairman function | |
| CN205545869U (en) | Handheld terminal audio frequency supply circuit | |
| CN205178996U (en) | Audio signal amplifier circuit | |
| CN105487442B (en) | The circuit of reset switch synchronous control mute function | |
| CN207766525U (en) | Sound equipment with power supply protection function | |
| CN203466963U (en) | Earphone conversion device | |
| CN208581306U (en) | Wireless same screen device | |
| CN207543345U (en) | Ad hoc network data acquire and fault diagnosis terminal | |
| CN208316995U (en) | A kind of inside and outside microphone switching circuit | |
| CN209767777U (en) | Collar clip microphone | |
| CN219577303U (en) | Intelligent home interaction experience display system | |
| CN215734805U (en) | Intelligent control audio signal amplifier | |
| CN205334136U (en) | Circuit of reset switch synchro control mute function | |
| CN207869325U (en) | A kind of double key control circuits and audio-frequence player device | |
| CN204334899U (en) | A kind of head circuit and earphone | |
| CN104300926A (en) | Audio power amplifier used for multimedia electronic equipment | |
| WO2021218533A1 (en) | Receiver control circuit and terminal | |
| CN204009411U (en) | Integrated two-sided control circuit board for USB speaker wire rod with bluetooth and power amplifier | |
| CN219351893U (en) | Passive loudspeaker box high-pitch lifting switch circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Guangdong city of Shenzhen province Futian District Che Kung Temple Tairan nine road Haisong building B-1303 Patentee after: Shenzhen smart Micro Intelligent Technology Co., Ltd Address before: 518000 Guangdong city of Shenzhen province Futian District Che Kung Temple Tairan nine road Haisong building B-1303 Patentee before: JWIPC TECHNOLOGY DEVELOPMENT Ltd. |