CN201893553U - Vibrating circuit and mobile terminal - Google Patents
Vibrating circuit and mobile terminal Download PDFInfo
- Publication number
- CN201893553U CN201893553U CN201020661505XU CN201020661505U CN201893553U CN 201893553 U CN201893553 U CN 201893553U CN 201020661505X U CN201020661505X U CN 201020661505XU CN 201020661505 U CN201020661505 U CN 201020661505U CN 201893553 U CN201893553 U CN 201893553U
- Authority
- CN
- China
- Prior art keywords
- electric capacity
- module
- circuit
- vibrating
- motor
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The utility model provides a vibrating circuit and a mobile terminal. The vibrating circuit comprises a power supply, a drive module and a vibrating module, wherein one end of the vibrating module is connected with one end of the drive module, and the other end of the vibrating module is connected with the power supply; and the vibrating circuit also comprises a capacitance; and one end of the capacitance is respectively connected with one end of the vibrating module and one end of the drive module, and the other end of the capacitance is grounded. A capacitance element with low cost is adopted to eliminate spike voltage on two ends of the drive module, so the influence on the drive module is reduced, and the influence on the performance of the terminal comprising the vibrating circuit can be further reduced. The circuit cost is also reduced.
Description
Technical field
The utility model embodiment relates to electronic technology, relates in particular to a kind of vibrating circuit and portable terminal.
Background technology
Motor is the vibration source of portable terminal, and generally motor vibrates under the driving of portable terminal master chip.Motor can produce a peak voltage at the drive end of motor in the process of stall.This peak voltage can produce serious electromagnetic interference; Simultaneously, because at present motor is directly driven by the portable terminal master chip, this peak voltage can cause the direct damage of master chip or cause mobile terminal function unusual (such as shutdown automatically etc.).
Present most of portable terminal; all adopt the protective circuit scheme of general heavy-duty motor, at motor two ends cross-over connection one diode, the clamp characteristic of utilization diode; with the voltage limit of motor driven end within the scope that requires, to eliminate the influence that peak voltage brings.
Yet, when adopting diode strangulation motor driven terminal voltage, the characteristic of diode is had higher requirement.For example, require the forward direction conduction voltage drop of diode enough low, be clamped within the voltage range of requirement to guarantee the motor driven terminal voltage.And behind motor two ends cross-over connection diode, there is certain overshoot in voltage oscillogram by the motor driven end, therefore as can be known in the voltage waveform of motor stops to vibrate moment motor driven end, motor circuit still can produce electromagnetic interference, thereby has influenced the communications of Mobile Terminals performance.
The utility model content
The utility model embodiment provides a kind of vibrating circuit and portable terminal, avoids vibration module to produce peak voltage, reaches the purpose of protection driver module and portable terminal.
The utility model embodiment provides a kind of vibrating circuit, comprising: power supply, driver module and vibration module, and an end of described vibration module connects an end of driver module, and the other end is connected with described power supply; Vibrating circuit also comprises electric capacity;
One end of described electric capacity connects an end of described vibration module and an end of described driver module, the other end ground connection of described electric capacity respectively.
The utility model embodiment also provides a kind of portable terminal, comprising: power supply, master chip and vibrating circuit; Described vibrating circuit comprises: vibration module and electric capacity, wherein,
One end of described vibration module connects an end of master chip, and the other end is connected with described power supply;
One end of described electric capacity connects an end of described vibration module and an end of described master chip, the other end ground connection of described electric capacity respectively.
In the vibrating circuit and portable terminal that the utility model embodiment provides, driver module and vibration module are connected with electric capacity.Stop moment at vibration module; electric current by vibration module reduces under the electric capacity effect gradually; thereby the induced voltage that vibration module produces is less, has reached the purpose of avoiding producing at the driver module two ends peak voltage, has played the effect of protection driver module and terminal.Owing to adopt the low electric capacity of cost to reduce induced voltage, therefore also reduced circuit cost.And reduced the electromagnetic interference that induced voltage causes.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the vibrating circuit embodiment one that Fig. 1 provides for the utility model;
The circuit diagram of the vibrating circuit embodiment two that Fig. 2 provides for the utility model;
The equivalent circuit diagram of the vibrating circuit embodiment two that Fig. 3 provides for the utility model;
The voltage oscillogram at the driver module two ends when increasing the electric capacity protection among the vibrating circuit embodiment two that Fig. 4 provides for the utility model;
The voltage oscillogram at Fig. 5 driver module two ends when not protecting in the prior art;
Fig. 6 is the voltage oscillogram at driver module two ends when increasing diode protection in the prior art;
The structural representation of the portable terminal embodiment that Fig. 7 provides for the utility model.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The structural representation of the vibrating circuit embodiment one that Fig. 1 provides for the utility model.As shown in Figure 1, the utility model embodiment comprises: power supply 10, driver module 11, vibration module 12 and electric capacity 13.
One end of vibration module 12 connects an end of driver module 11, and the other end is connected with power supply 10.When vibrating circuit was worked, the other end of driver module 11 was connected with power supply 10, and power supply 10 is vibration module 12 and driver module 11 power supplies, and vibration module 12 vibrates under the driving of driver module 11.
Stop to drive moment of vibration module 12 vibrations at driver module 11, the electric current by vibration module 12 can reduce suddenly, and promptly the rate of change of electric current is bigger, thereby produces bigger induced voltage at driver module 11 two ends.For avoiding producing bigger induced voltage, increased electronic component in the utility model vibrating circuit: electric capacity at driver module 11 two ends.
One end of electric capacity 13 connects an end of vibration module 12, and an end of electric capacity 13 also is connected with an end of driver module 11, the other end ground connection of electric capacity 13.
When vibration module 12 is connected with electric capacity 13, because electric capacity 13 has the logical characteristic that exchanges the resistance direct current.Make the impedance loop of vibrating circuit increase gradually.According to Ohm's law, when impedance loop became big gradually, the electric current of vibration module diminished gradually, and correspondingly the induced voltage that produces at the vibration module two ends also can reduce.Because the voltage at driver module two ends is the stack of supply voltage and induced voltage, at induced voltage hour, the driver module two ends can not produce peak voltage.
The utility model vibrating circuit is applicable to portable terminal and toy, and the miscellaneous equipment that adopts the small-power vibrating circuit.
In the utility model embodiment vibrating circuit, driver module and vibration module are connected with electric capacity.Stop moment at vibration module; electric current by vibration module reduces under the electric capacity effect gradually; thereby the induced voltage that vibration module produces is less, has reached the purpose of avoiding producing at the driver module two ends peak voltage, has played the effect of protection driver module and terminal.Owing to adopt the low electric capacity of cost to reduce induced voltage, therefore also reduced circuit cost.And reduced the electromagnetic interference that induced voltage causes.
The equivalent circuit diagram of the vibrating circuit embodiment two that the circuit diagram of the vibrating circuit embodiment two that Fig. 2 provides for the utility model, Fig. 3 provide for the utility model.As shown in Figure 2, vibration module 12 specifically can be motor 21 among the corresponding embodiment of Fig. 1.
As shown in Figure 2, power supply 10 connects the positive pole of motor 21, and the negative pole of motor 21 connects an end of electric capacity 13.One end of electric capacity 13 also is connected with driver module 11, the other end ground connection of electric capacity 13.
21 stall moments of motor can an equivalent Cheng Youyi generator, an inductance 211 and the circuit that resistance 212 is formed that stores magnetic energy.The energy that is provided of generator also can be equivalent in the magnetic energy of inductance 211 storages, and its equivalent electric circuit as shown in Figure 3.Electric capacity 13 has been formed the RC filter circuit with resistance 212, and electric capacity 13 has been formed the LC filter circuit with inductance 211.
As shown in Figure 3, in motor 21 vibration processes, switch 22 closures on the vibrating circuit, electric current flows along the direction shown in the I1.Under the situation that does not adopt electric capacity that driver module is protected; switch 22 disconnects; the moment that motor 21 stops to vibrate; impedance moment of vibrating circuit becomes infinity, according to Ohm's law: and electric current=voltage/impedance, when impedance increases suddenly; electric current along the I1 direction in the inductance 211 reduces suddenly; by electromagnetic induction principle, produce the induced voltage that the obstruction electric current reduces at the two ends of inductance 211, the direction of this induced voltage is identical with electric current I 1 direction.In adopting the small-power vibrating circuit, the superimposed voltage that might produce of this induced voltage and power supply 10 voltages up to 10V.The voltage at driver module 11 two ends of motor equals the stack of induced voltage on supply voltage and the inductance 211 as shown in Figure 3.Be added in the two ends of driver module 11 up to the voltage of 10V, can cause driver module 11 operation irregularities or directly burn out.
End at driver module 11 is connected with under the situation of electric capacity, when switch 22 disconnects, in the moment of motor 21 failure of oscillations, the alternating current by inductance 211 through resistance 212 to electric capacity 13 chargings, because electric capacity 13 has the logical characteristic that exchanges the resistance direct current, the impedance of vibrating circuit increases gradually.According to Ohm's law: electric current=voltage/impedance also reduces gradually along the electric current of I2 direction.Therefore,, prolonged, made current changing rate less along the transformation period of the electric current of I2 direction in the moment of motor 21 failure of oscillations.Current changing rate by inductance 211 is less, according to electromagnetic induction principle, and also corresponding the reducing of induced voltage that the obstruction electric current that inductance 211 two ends produce diminishes.Correspondingly, both end voltage also can reduce on the driver module 11.In addition, when the induced voltage on the inductance 211 reduced, the electromagnetic interference that is produced also reduced.
Further because the existence of pressure drop on the resistance 212, when selecting suitable electric capacity 13, in the motor stalling, the voltage that driver module 11 two ends produce may not can beyond supply voltage.When selecting electric capacity, can calculate the appearance value of electric capacity according to the size of electric current and the intensity of motor internal magnetic field etc. in the rotating speed of motor, the revolution process.A kind of simple mode is: according to motor failure of oscillation moment size and peak value without any the reverse voltage under the backflow situation, the RC filter circuit road of simplicity of design and LC filter circuit are eliminated the peak voltage at driver module 11 two ends, wherein, R and L are had parameter by motor when design is finished, C is the appearance value of selected electric capacity.
The utility model vibrating circuit, the RC filter circuit and the LC filter circuit that adopt electric capacity and motor to constitute are removed the induced voltage that motor produces, and the voltage that has reduced the driver module two ends causes the unusual possibility of terminal works.Select can remove when suitable the device of anti-electromagnetic interference on the motor circuit at electric capacity, circuit cost is lower.
When Fig. 4 to Fig. 6 is 1uF for electric capacity, is increasing the electric capacity protection and do not increasing under the situation of electric capacity protection the voltage oscillogram at driver module two ends.The voltage oscillogram at the driver module two ends when increasing the electric capacity protection among the vibrating circuit embodiment two that Fig. 4 provides for the utility model; the voltage oscillogram at Fig. 5 driver module two ends when not protecting in the prior art, Fig. 6 be the voltage oscillogram at driver module two ends during the increase diode protection in the prior art.
As shown in Figure 5, when driver module not being protected, in the moment that motor stops to vibrate, there is peak voltage in the driver module two ends.As shown in Figure 6, behind motor two ends cross-over connection diode,, there is certain overshoot in the voltage waveform at driver module two ends, therefore also has electromagnetic interference, thereby influence the work of driver module when the moment that motor stops to vibrate.As shown in Figure 4, after motor one termination capacitor, in the moment that motor stops to vibrate, the voltage waveform at driver module two ends is more steady, and its antihypertensive effect obviously is better than the scheme of Fig. 6 correspondence.
The portable terminal example structure schematic diagram that Fig. 7 provides for the utility model.As shown in Figure 7, present embodiment comprises: power supply 70, master chip 71 and vibrating circuit 72.Wherein vibrating circuit 72 involving vibrations modules 721 and electric capacity 722.Drive vibration module 721 work by master chip 71 in the present embodiment.
Wherein the annexation of each module is as follows in the vibrating circuit 72:
One end of vibration module 721 connects an end of master chip 71, and the other end of vibration module 721 is connected with power supply 70.When vibrating circuit was worked, the other end of master chip 71 was connected with power supply 70, and power supply 70 is vibration module 721 and master chip 71 power supplies, and vibration module 721 vibrates under the driving of master chip 71.
One end of electric capacity 722 connects an end of vibration module 721 and an end of master chip 71, the other end ground connection of electric capacity 722 respectively.
When vibration module 721 is connected with electric capacity 722,, make the impedance loop of vibrating circuit increase gradually because electric capacity 722 has the characteristic of indirect current.According to Ohm's law, when impedance loop became big gradually, the electric current of vibration module 721 diminished gradually, and correspondingly the induced voltage that produces at vibration module 721 two ends also can reduce.Because the voltage at master chip 71 two ends is the stack of supply voltage and induced voltage, at induced voltage hour, master chip 71 two ends can not produce peak voltage, thereby reach the purpose of protection master chip.
In the present embodiment, vibration module 721 specifically can be motor.Electric capacity 722 can be formed RC filter circuit and LC filter circuit with motor.
Present embodiment has reduced the induced voltage that vibration module 721 produces after vibration module 721 1 ends connect electric capacity, thereby reduces the principle of master chip two ends peak voltage, can not repeat them here referring to describing among Fig. 1 and the corresponding embodiment of Fig. 2.
In the utility model embodiment portable terminal, driver module and master chip are connected with electric capacity.Stop moment at vibration module, the electric current by vibration module reduces under the electric capacity effect gradually, thereby the induced voltage that vibration module produces is less, has reached the purpose of avoiding producing at the master chip two ends peak voltage, has played the effect of protection master chip.Also reduce simultaneously the electromagnetic interference that induced voltage that the vibration module two ends produce causes, also reduced circuit cost.
It should be noted that at last: above embodiment only in order to the explanation the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (6)
1. vibrating circuit comprises: power supply, driver module and vibration module, and an end of described vibration module connects an end of driver module, and the other end is connected with described power supply; It is characterized in that, also comprise electric capacity;
One end of described electric capacity connects an end of described vibration module and an end of described driver module, the other end ground connection of described electric capacity respectively.
2. vibrating circuit according to claim 1 is characterized in that, described vibration module is a motor.
3. vibrating circuit according to claim 2 is characterized in that, described electric capacity and described motor are formed RC filter circuit and LC filter circuit.
4. portable terminal, comprising: power supply, master chip and vibrating circuit is characterized in that described vibrating circuit comprises: vibration module and electric capacity, wherein,
One end of described vibration module connects an end of master chip, and the other end is connected with described power supply;
One end of described electric capacity connects an end of described vibration module and an end of described master chip, the other end ground connection of described electric capacity respectively.
5. portable terminal according to claim 4 is characterized in that, described vibration module is a motor.
6. portable terminal according to claim 5 is characterized in that, described electric capacity and described motor are formed RC filter circuit and LC filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020661505XU CN201893553U (en) | 2010-12-06 | 2010-12-06 | Vibrating circuit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020661505XU CN201893553U (en) | 2010-12-06 | 2010-12-06 | Vibrating circuit and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201893553U true CN201893553U (en) | 2011-07-06 |
Family
ID=44223022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020661505XU Expired - Lifetime CN201893553U (en) | 2010-12-06 | 2010-12-06 | Vibrating circuit and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201893553U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100758A (en) * | 2016-05-31 | 2016-11-09 | 维沃移动通信有限公司 | A kind of mobile terminal |
| CN107276685A (en) * | 2017-05-31 | 2017-10-20 | 广东欧珀移动通信有限公司 | Processing method, device, storage medium and the terminal of Radio frequency interference |
| CN112490869A (en) * | 2020-11-10 | 2021-03-12 | 山西沃能化工科技有限公司 | Method for eliminating induced electricity of starting circuit of running equipment |
-
2010
- 2010-12-06 CN CN201020661505XU patent/CN201893553U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100758A (en) * | 2016-05-31 | 2016-11-09 | 维沃移动通信有限公司 | A kind of mobile terminal |
| CN107276685A (en) * | 2017-05-31 | 2017-10-20 | 广东欧珀移动通信有限公司 | Processing method, device, storage medium and the terminal of Radio frequency interference |
| CN112490869A (en) * | 2020-11-10 | 2021-03-12 | 山西沃能化工科技有限公司 | Method for eliminating induced electricity of starting circuit of running equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201893553U (en) | Vibrating circuit and mobile terminal | |
| CN201937399U (en) | DC brushless motor driving device with function of overhigh counter electromotive force protection | |
| CN202872356U (en) | Surge suppression circuit | |
| CN106787684A (en) | A kind of automobile instrument power source circuit | |
| CN204615649U (en) | DC voltage-stabilizing transducer | |
| CN203193492U (en) | Full-bridge driving circuit | |
| CN106533296B (en) | A kind of stator permanent magnetic type memory electrical machine adjustable magnetic method based on quantitative adjustable magnetic pulse | |
| CN204809912U (en) | Protection circuit of vehicle control unti power | |
| CN202042906U (en) | Voltage spike filter | |
| CN104252831A (en) | Backlight current adjusting device and method | |
| CN202535306U (en) | Motor drive device based on hybrid multilevel inverter | |
| CN206412930U (en) | A kind of reduction voltage circuit | |
| CN107437869A (en) | Suppress EMC circuit structure, motor and electrical equipment | |
| CN210460235U (en) | Intelligent door lock with stable electric control system | |
| CN206389307U (en) | A kind of sub-driver circuit of two-phase stepper motor | |
| CN202713025U (en) | Brush holder plate for automobile radiator fan motor | |
| CN204316319U (en) | Vehicle-mounted power adapter | |
| CN207416595U (en) | A kind of electric tractor wireless charging device | |
| CN203574370U (en) | Power supply filtering/energy storage circuit | |
| CN104682734B (en) | Power-switching circuit | |
| CN202978255U (en) | Outer rotor electronic control type fan overvoltage protection circuit | |
| CN203136141U (en) | A power switching circuit of a Bluetooth earphone | |
| CN206819728U (en) | A kind of multiple tone buzzer circuit | |
| CN205336626U (en) | Discharge lamp's control circuit | |
| CN207098940U (en) | A kind of special DC DC12V10A converters of electric car |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171027 Address after: Metro Songshan Lake high tech Industrial Development Zone, Guangdong Province, Dongguan City Road 523808 No. 2 South Factory (1) project B2 -5 production workshop Patentee after: HUAWEI terminal (Dongguan) Co., Ltd. Address before: 518129 Longgang District, Guangdong, Bantian HUAWEI base B District, building 2, building No. Patentee before: Huawei Device Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee after: Huawei Device Co., Ltd. Address before: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee before: HUAWEI terminal (Dongguan) Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110706 |