CN114839571B - Circuit for detecting plugging and unplugging of equipment and electronic equipment - Google Patents
Circuit for detecting plugging and unplugging of equipment and electronic equipment Download PDFInfo
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- CN114839571B CN114839571B CN202210756494.0A CN202210756494A CN114839571B CN 114839571 B CN114839571 B CN 114839571B CN 202210756494 A CN202210756494 A CN 202210756494A CN 114839571 B CN114839571 B CN 114839571B
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- 238000001514 detection method Methods 0.000 claims abstract description 65
- 230000008859 change Effects 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 7
- 238000007599 discharging Methods 0.000 abstract description 2
- 230000001502 supplementing effect Effects 0.000 description 13
- 230000005611 electricity Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 7
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 102000012677 DET1 Human genes 0.000 description 4
- 101150113651 DET1 gene Proteins 0.000 description 4
- 230000015654 memory Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
- G01R31/69—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The application provides circuit and electronic equipment of check out test set plug, the circuit of check out test set plug includes: the device comprises a discharge output circuit, at least one plug detection circuit module and at least one output channel matched with the at least one plug detection circuit module; the discharging output circuit is connected with one end of at least one plug detection circuit module, the other end of the at least one plug detection circuit module is connected with at least one output channel matched with the at least one plug detection circuit module, and the at least one output channel is connected with a power supply end of at least one external sub-device. The technical scheme provided by the application has the advantages of high sensitivity and stable output level.
Description
Technical Field
The invention relates to the field of electronic equipment, in particular to a circuit for detecting plugging and unplugging of equipment and the electronic equipment.
Background
At present, a large number of electronic devices (such as true Wireless earphones TWS (tune Wireless stereo) or a tie-in Wireless microphone) with a power supplementing bin are on the market, and in the system, the power supplementing bin charges a self battery through an external power supply and outputs the self battery to the sub-devices for charging after boosting; the power supply cabin is in a low power consumption state when the sub-equipment is not charged, so that a plugging signal of the sub-equipment needs to be detected and is used for triggering the sub-equipment to be charged or other actions, and the self power consumption of the power supply cabin needs to be reduced after the power supply of the sub-equipment is completed, namely the power supply cabin stops boosting and outputting, and converts the power supply cabin into a stable voltage signal to be supplied to the sub-equipment. The sensitivity of the electronic equipment of the existing power supply cabin on the plugging and unplugging detection of the sub-equipment is low, and the user experience degree is influenced.
Disclosure of Invention
The embodiment of the invention provides a circuit and a method for detecting plugging and unplugging of equipment, which can improve the sensitivity of plugging and unplugging detection of the sub-equipment and improve the user experience.
In a first aspect, an embodiment of the present invention provides a circuit for detecting plugging and unplugging of a device, where the circuit includes: the device comprises a discharge output circuit, at least one plug detection circuit module and at least one output channel matched with the at least one plug detection circuit module;
the discharging output circuit is connected with one end of at least one plug detection circuit module, the other end of the at least one plug detection circuit module is connected with at least one output channel matched with the at least one plug detection circuit module, and the at least one output channel is connected with a power supply end of at least one external sub-device.
The application also provides an electronic device, which comprises the circuit for plugging the detection device
The embodiment of the invention has the following beneficial effects:
it can be seen that, in the circuit structure shown in fig. 2, since the driving capability of the high-potential output circuit is very weak, even when the input impedance of the inserted device is very large, the level of the circuit output can be pulled down, i.e. the circuit has ultrahigh sensitivity and very low power consumption; and because the low potential output circuit has the function of preventing backflow, this has guaranteed that the pull-up of high potential output circuit can not be drawn and arouse the spurious triggering because of low potential output circuit electric leakage, and the driving force of low potential output circuit is very strong, so have equipment to insert back still can keep the output level, make equipment both sides can both detect the plug-in state, thereby improve the sensitivity and the output level stability of plug, improve user experience degree.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a circuit for detecting plugging of a device;
FIG. 2 is a schematic circuit diagram of another detection device provided in the present application;
fig. 3 is a schematic circuit diagram of a plugging/unplugging detection device according to still another embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," and "fourth," etc. in the description and claims of the invention and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, result, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic diagram of a circuit for plugging and unplugging a power supply bin detection sub-device, and as shown in fig. 1, the circuit may specifically include: comparator U1, voltage source (+ 5V), current source I 0 Comparison voltage V ref (ii) a Wherein,
the output end of the comparator U1 is the output level DET detected by the sub-device, and the positive input end of the comparator U1 is connected with the comparison voltage V ref (ii) a The negative input end of the comparator U1 is connected with the output pin V of the power supply cabin out Output pin V out And also with a current source I 0 And a voltage source connection, the output pin V out And is also connected with the power supply end of the external sub-device.
The detection plugging principle of the circuit shown in fig. 1 is as follows:
one is pulled up to V BAT Current source I 0 Current source I 0 The driving ability is very weak, when no sub-device (such as earphone) is inserted into the electricity supplementing bin, V out When the sub-equipment is inserted into the electricity supplementing bin, V out The level is pulled low, and the comparator U1 judges V out And a comparison voltage V ref And then comparator U1 passes V out High and low level changes to detect device insertion and removal.
In the circuit configuration shown in FIG. 1, the current source I 0 When the driving capability is too weak, V is formed after the sub-equipment is inserted into the power supply cabin out The level cannot be maintained at a higher level, i.e. the kid device cannot detect that it has been inserted. When the current source I is strengthened 0 When the input impedance of the sub-device is large, V cannot be adjusted out The level is lowered, and at the moment, the power supply cabin cannot detect the insertion of the sub-equipment; at this time, the output impedance of the sub-device is reduced, and V can be adjusted out The level is pulled low to trigger insertion, but the power consumption of the circuit structure shown in FIG. 1 is increased, and the output impedance of the sub-device needs to be adjusted to V out The level is maintained at a level where the kid device can detect the demand level at the bin, the debugging is not flexible, the technique does not balance well between sensitivity and power consumption, and a large adjustment margin is required for the entire circuit to be compatible with multiple kid devices.
Referring to fig. 2, fig. 2 is a schematic diagram of a circuit for detecting plugging and unplugging of a power compensation cabin provided in the present application, as shown in fig. 2, the circuit for detecting plugging and unplugging of a power compensation cabin may specifically include:
the device comprises a discharge output circuit, at least one plug detection circuit module and at least one output channel matched with the at least one plug detection circuit module, wherein the discharge output circuit is connected with one end of the at least one plug detection circuit module, the other end of the at least one plug detection circuit module is connected with the at least one output channel matched with the at least one plug detection circuit module, and the at least one output channel is connected with a power supply end of at least one external sub-device.
For example, if at least one plug detection circuit module is 2 or more than 2, then 2 or more than 2 plug detection circuit modules are connected in parallel.
As shown in fig. 2, the present application provides a multi-channel device plugging detection circuit system structure, each of the detection circuits has the same circuit design, and the description is given by taking one circuit as an example, and the structure includes: the circuit comprises a pass switch, a high potential output circuit, a low potential output circuit and a signal detection circuit, wherein:
a path switch: the function is to cut off the path of the discharge output circuit for supplying power to the sub-equipment and switch to a plugging detection state.
High potential output circuit: the effect is to provide a weak drive pull-up of a high potential.
A low potential output circuit: the function is to provide a strong drive pull-up of low potential and has the function of preventing backflow.
It should be noted that the high-potential output circuit may be a current source with a voltage higher than that of the low-potential output circuit, and similarly, the low-potential output circuit may be a current source with a voltage lower than that of the high-potential output circuit.
The signal detection circuit: the effect is to detect a level change on the output channel.
The principle of the sub-device insertion detection of the circuit shown in fig. 2 is as follows:
1. the access switch is turned off to make the system in the plugging and unplugging detection state, and the high potential output circuit, the low potential output circuit and the signal detection circuit are turned on. When the sub-equipment is not inserted, the signal detection circuit detects that the level of the output channel is higher than the threshold value due to the pull-up of the high-potential output circuit, and the signal detection circuit sends a signal indicating that the sub-equipment is in a pull-out state.
2. When the sub-equipment is inserted, because the high-potential output circuit is driven very weakly, the level of the output channel is pulled low, the signal detection circuit immediately detects that the level of the output channel is lower than a threshold value, and the signal detection circuit sends a signal in the inserting state of the sub-equipment; when the output channel level is continuously pulled down, the low potential output circuit starts to provide strong driving pull-up to stabilize the output channel level, and at the moment, the sub-device can detect that the input end of the sub-device has a stable level, namely, the sub-device detects that the sub-device is inserted into the power supplementing bin.
3. So far, the electricity supplementing bin detects that the sub-equipment enters the electricity supplementing bin, the electricity supplementing bin turns to the working state that the sub-equipment is detected to be pulled out, and the sub-equipment 1 also detects that the electricity supplementing bin is inserted.
The principle of the sub-device pull-out detection of the circuit shown in fig. 2 is as follows:
1. after the insertion event occurs, the level of the output channel is stabilized by the low potential output circuit, and the signal detection circuit detects that the level of the output channel is lower than the detection threshold value.
2. When the sub-equipment is pulled out, the level of the output channel is pulled to the high potential due to the pull-up of the high potential output circuit, the signal detection circuit immediately detects that the level of the output channel is higher than a detection threshold value at the moment, the signal detection circuit sends a signal in the pulling-out state of the sub-equipment, the sub-equipment cannot detect that the level is at the input end of the sub-equipment at the moment, and the sub-equipment detects that the power supplement bin is pulled out.
3. So far, the electricity supplementing bin detects that the sub-equipment is taken out of the electricity supplementing bin, the electricity supplementing bin turns to a detection sub-equipment insertion working state, and the sub-equipment also detects that the electricity supplementing bin is taken out.
In the circuit configuration shown in fig. 2, since the driving capability of the high-potential output circuit is very weak, even when the input impedance of the inserted device is very large, the level of the circuit output can be pulled down, i.e., the circuit configuration has very high sensitivity and very low power consumption; and because the low potential output circuit has the function of preventing backflow, it is guaranteed that the pull-up of the high potential output circuit is not pulled down by the leakage of the low potential output circuit to cause false triggering, and the driving capability of the low potential output circuit is very strong, so that the output level can still be maintained after equipment is plugged in, and both sides of the equipment can detect the plugging state.
Illustratively, the discharge output circuit may be a +5V voltage source.
Illustratively, the pass switch may be the switch S1.
For example, the low potential output circuit may specifically include: low potential current source I d1 And a switching tube, wherein one end of the switching tube is connected with the output channel, and the other end of the switching tube is connected with low powerBit current source I d1 . For example, the switching tube may be a diode or a diode-like diode.
For example, the high potential output circuit may specifically include: high potential current source I a1 。
For example, the signal detection circuit may specifically include: a voltage comparator U1.
For example, the high potential output circuit, the low potential output circuit, the pass switch, and the discharge output circuit may also adopt other circuit structures, and the present application does not limit the specific structures of the high potential output circuit, the low potential output circuit, the pass switch, and the discharge output circuit, and only the circuits of the high potential output circuit, the low potential output circuit, the pass switch, and the discharge output circuit need to be able to realize the corresponding functions.
Referring to fig. 3, fig. 3 provides a schematic circuit diagram of another circuit for detecting plugging/unplugging of a device, i.e., a multi-channel plugging/unplugging detection circuit system.
As shown in FIG. 3, the present invention provides a circuit implementation of a multi-channel device plugging/unplugging detection circuit system, each channel has the same circuit design, and is described as a channel circuit, which includes a channel switch S1, a voltage comparator U1, a current source I a1 /I d1 Class diode circuit D1, voltage comparator U1, wherein:
current source I a1 Namely a high potential output circuit.
Current source I d1 The and diode-like circuit D1 is a low potential output circuit.
The voltage comparator U1 is the signal sense current.
The detection principle is explained below:
the charging and plugging detection states of the sub-equipment 1 are switched:
1. when the plugging detection is needed, S1 is closed, and I is opened a1 And I d1 Enter the plugging detection state
2. When the sub-device 1 needs to be charged, I is turned off a1 And I d1 And conducting S1 to output 5V for charging the sub-device.
And (3) insertion detection:
1. close S1, open I a1 And I d1 When the child appliance 1 is not inserted, V out1 By current source I d1 Pulled up to a voltage V BAT Detecting signal V DET1 The output is 0.
2. When inserting the sub-device 1, due to the current source I d1 The current is very small, and V is formed after all the current flows into the sub-equipment out1 Voltage far lower than V ref1 Detecting signal V DET1 The output is 1.
3. When the sub-apparatus 1 is inserted, V out1 Voltage lower than V ref1 Rear, current source I a1 Providing a larger current, a out1 Voltage clamping at V d The slave device 1 detects an input voltage of V d Identifying an inserted bin; both parties can detect the warehousing.
And (3) pulling out and detecting:
1. in the state in which the slave device 1 has been inserted into the magazine, V out1 The voltage is Vd, when the sub-device 1 is pulled out, the equivalent is that the load current is removed, V out1 The voltage rises rapidly at V out1 The voltage being higher than V ref1 Time, detection signal V DET1 Output 0, final V out1 Stabilized at V BAT A voltage.
2. After the child appliance 1 is pulled out, V out1 A voltage of V BAT Detecting signal V DET1 The voltage compensation bin is 0, the sub-device 1 is identified to be pulled out, the input voltage is detected to be 0 after the sub-device 1 leaves the voltage compensation bin, and the pulled out bin can also be detected.
The application also provides an electronic device, which includes the circuit for detecting the plugging of the device as shown in fig. 2 or fig. 3.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may be performed in other orders or concurrently according to the present invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are exemplary embodiments and that the acts and modules referred to are not necessarily required to practice the invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash Memory disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.
The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (8)
1. A circuit for detecting plugging of a device, the circuit comprising: the device comprises a discharge output circuit, at least one plug detection circuit module and at least one output channel matched with the at least one plug detection circuit module;
the discharge output circuit is connected with one end of at least one plug detection circuit module, the other end of the at least one plug detection circuit module is connected with at least one output channel matched with the plug detection circuit module, and the at least one output channel is connected with a power supply end of at least one external sub-device;
the plug detection circuit module includes: the circuit comprises a pass switch, a high potential output circuit, a low potential output circuit and a signal detection circuit;
one end of the pass switch is connected with the output end of the discharge output circuit, the other end of the pass switch is connected with the output channel, and the output end of the high-potential output circuit and the output end of the low-potential output circuit are both connected with the output channel;
the path switch is used for closing or opening a path for supplying power to the sub-equipment by the discharge output circuit;
the high potential output circuit is used for providing a weak driving pull-up of a high potential;
the low potential output circuit is used for providing a low potential strong drive pull-up and has a backflow prevention function;
and the signal detection circuit is used for detecting the level change on the output channel.
2. The plugging and unplugging detection circuit of claim 1, wherein if at least one plugging and unplugging detection circuit module is 2 or more than 2, then 2 or more than 2 plugging and unplugging detection circuit modules are connected in parallel.
3. The circuit for detecting plugging and unplugging of a device according to claim 1,
the discharge output circuit is specifically a +5V voltage source.
4. The device plugging and unplugging detection circuit of claim 1,
the low potential output circuitThe body includes: low potential current source I d1 And a switching tube, wherein one end of the switching tube is connected with the output channel, and the other end of the switching tube is connected with a low potential current source I d1 。
5. The circuit for detecting plugging and unplugging of a device according to claim 4,
the switch tube is a diode or a diode-like tube.
6. The circuit for detecting plugging and unplugging of a device according to claim 1,
the high potential output circuit specifically includes: high potential current source I a1 。
7. The circuit for detecting plugging and unplugging of a device according to claim 1,
the signal detection circuit specifically includes: a voltage comparator U1.
8. An electronic device, characterized in that it comprises a circuit for detecting the plugging of a device according to any one of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210756494.0A CN114839571B (en) | 2022-06-30 | 2022-06-30 | Circuit for detecting plugging and unplugging of equipment and electronic equipment |
| CN202211197027.5A CN117330999A (en) | 2022-06-30 | 2022-06-30 | Circuit for detecting equipment plug and related electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210756494.0A CN114839571B (en) | 2022-06-30 | 2022-06-30 | Circuit for detecting plugging and unplugging of equipment and electronic equipment |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211197027.5A Division CN117330999A (en) | 2022-06-30 | 2022-06-30 | Circuit for detecting equipment plug and related electronic equipment |
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| CN114839571A CN114839571A (en) | 2022-08-02 |
| CN114839571B true CN114839571B (en) | 2022-09-16 |
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| CN202211197027.5A Pending CN117330999A (en) | 2022-06-30 | 2022-06-30 | Circuit for detecting equipment plug and related electronic equipment |
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2022
- 2022-06-30 CN CN202210756494.0A patent/CN114839571B/en active Active
- 2022-06-30 CN CN202211197027.5A patent/CN117330999A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105451149A (en) * | 2015-12-30 | 2016-03-30 | 潍坊歌尔电子有限公司 | Loudspeaker plug detection circuit and electronic device |
| CN209231439U (en) * | 2018-12-07 | 2019-08-09 | 歌尔科技有限公司 | A kind of earphone USB port insertion detection circuit |
| CN110572738A (en) * | 2019-10-08 | 2019-12-13 | 上海爻火微电子有限公司 | wireless earphone charging circuit and wireless earphone box |
| CN110912224A (en) * | 2019-11-13 | 2020-03-24 | 宁波公牛数码科技有限公司 | Charging device and charging device control method |
| CN114624633A (en) * | 2022-05-17 | 2022-06-14 | 陕西天视致远航空技术有限公司 | HDMI (high-definition multimedia interface) port plugging detection system and method, electronic equipment and storage medium |
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| Publication number | Publication date |
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| CN114839571A (en) | 2022-08-02 |
| CN117330999A (en) | 2024-01-02 |
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