CN109272976A - A kind of buzzer drive circuit - Google Patents
A kind of buzzer drive circuit Download PDFInfo
- Publication number
- CN109272976A CN109272976A CN201811247461.3A CN201811247461A CN109272976A CN 109272976 A CN109272976 A CN 109272976A CN 201811247461 A CN201811247461 A CN 201811247461A CN 109272976 A CN109272976 A CN 109272976A
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- oscillator
- nmos tube
- circuit
- power supply
- frequency divider
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- 239000003990 capacitor Substances 0.000 claims abstract description 12
- 238000003491 array Methods 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electronic Switches (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
The present invention provides a kind of buzzer drive circuit, including voltage regulator circuit, fuse network, RC oscillator, frequency divider, driving NMOS tube, afterflow device, external capacitor.Wherein, fuse network, RC oscillator, frequency divider feeder ear pass through voltage regulator circuit and be connected on power supply, the output end of fuse network is connected on RC oscillator, the output end of RC oscillator is connected on frequency divider, the output end of frequency divider is connected on the grid of driving NMOS tube, the source electrode of driving NMOS tube is grounded and drain electrode is connected on power supply by afterflow device, and one end of external capacitor is grounded and another termination power, and the output end of this driving circuit is connected to the drain electrode of driving NMOS tube.The present invention makes the frequency of oscillation stability of RC oscillator be improved significantly, drive NMOS tube driving current more stable, and make the most of logic circuits of circuit be avoided power supply and cross great fluctuation process and burn, chip is burnt when being beneficial to prevent power supply line and reversed ground wire.
Description
Technical field
The present invention relates to a kind of buzzer actuation techniques fields, and in particular to a kind of buzzer drive circuit.
Background technique
Traditional buzzer oscillation source generally uses triode multi-resonant oscillating circuit, and the principle of the starting of oscillation of this circuit is main
Make triode alternate conduction by the charge and discharge of resistance and capacitor, this conventional surge circuit have the disadvantage in that frequency with
Power-supply fluctuation changes greatly, at high cost because the device that circuit uses is discrete device.And that uses production of integrated circuits
Buzzer drive circuit, as shown in fig. 6, having the disadvantage in that the output frequency of (1) this circuit becomes with the fluctuation of power supply
Change obvious；(2) eight grades of frequency dividers are used in circuit, the design parameter of prime RC oscillator are limited, especially in conjunction with work
Skill, consistency comprehensive between cost are considered；(3) more because of the logic circuit being connected directly with power supply, buzzer is in addition
Perceptual device be easy to cause power-supply fluctuation, and then circuit is be easy to cause to damage；(4) output end driving current is with supply voltage wave
It moves bigger；(5) for internal circuit when power supply and ground wire are reversed, i.e., the power supply line of chip is by misconnection to ground wire, the ground wire of chip
By misconnection to power supply line, chip is easily burned out.
Summary of the invention
The present invention provides a kind of buzzer drive circuit, appearance when solving power supply line of the existing technology and reversed ground wire
The stability problem of the problem of easily burning chip and frequency stability and consistency, driving current, while save the cost.
In order to solve the above technical problems, as shown in Figure 1, the present invention provides a kind of buzzer drive circuit, including pressure stabilizing electricity
Road, fuse network, RC oscillator, frequency divider, driving NMOS tube, afterflow device, external capacitor, the fuse network, the RC
Oscillator, the frequency divider pass through the voltage regulator circuit and are connected on power supply, and the output end of the fuse network is connected to institute
It states on RC oscillator, the output end of the RC oscillator is connected on the frequency divider, and the output end of the frequency divider is connected to
On the grid of the driving NMOS tube, the source electrode of the driving NMOS tube, which is grounded and drains, is connected to electricity by the afterflow device
On source, one end of the external capacitor is grounded and another termination power, the output end of this driving circuit are connected to driving NMOS tube
Drain electrode.
Preferably, the fuse network is made of several fuses and switch arrays, different fuse combinations, corresponding corresponding
Switch arrays, to control the frequency of RC oscillator.
Preferably, the afterflow device is diode.
Preferably, the afterflow device is the diode connection for driving NMOS tube.
Preferably, the afterflow device is the diode connection of triode.
Bring of the present invention is the utility model has the advantages that buzzer drive circuit provided by the invention gives fuse net by voltage regulator circuit
Network, RC oscillator, frequency divider power supply, make the frequency of oscillation stability of RC oscillator be improved significantly, so that circuit is most
Number logic circuits are avoided power supply and cross great fluctuation process and burn, when being beneficial to prevent power supply line and reversed ground wire, i.e. chip
Power supply line burns chip by misconnection to power supply line by misconnection to ground wire, the ground wire of chip；The grade of adjusting frequency divider can also be passed through
Number suitably to adjust the design parameter of RC oscillator, be conducive to save the cost with further increase the consistent of RC oscillator frequency
Property；Because the prime frequency divider of NMOS tube is driven to power by voltage regulator circuit, drive the gate voltage of NMOS tube more stable,
In a certain range not with power-supply fluctuation, so that driving NMOS tube driving current is more stable.
Detailed description of the invention
Circuit diagram Fig. 1 of the invention.
Fig. 2 is the structural schematic diagram of buzzer drive circuit according to an embodiment of the present invention.
Fig. 3 is the application schematic diagram of buzzer drive circuit according to an embodiment of the present invention.
Fig. 4 is the application schematic diagram of buzzer drive circuit according to an embodiment of the present invention.
Fig. 5 is the application schematic diagram of buzzer drive circuit according to an embodiment of the present invention.
Fig. 6 is buzzer drive circuit schematic diagram in background technique.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with drawings and the specific embodiments, to this
Invention is described in further detail.
As shown in Figure 1, a kind of buzzer drive circuit provided by the invention, including voltage regulator circuit, fuse network, RC oscillation
Device, frequency divider, driving NMOS tube, afterflow device, external capacitor, the fuse network, the RC oscillator, the frequency divider are equal
It is connected on power supply by the voltage regulator circuit, the output end of the fuse network is connected on the RC oscillator, the RC
The output end of oscillator is connected on the frequency divider, and the output end of the frequency divider is connected to the grid of the driving NMOS tube
On, the source electrode of the driving NMOS tube is grounded and drain electrode is connected on power supply by the afterflow device, the external capacitor
One end ground connection and another termination power.The output end of entire driving circuit is connected to the afterflow device and the driving NMOS tube
Between route on.
Furthermore, it is understood that the fuse network is made of several fuses and switch arrays, different fuse combinations is corresponding
Corresponding switch arrays, to control the frequency of RC oscillator, the afterflow device is diode, or the diode for NMOS tube
The diode connection of connection or triode.
Voltage regulator circuit: the effect of voltage regulator circuit be when supply voltage in a certain range or it is excessively high when, voltage regulator circuit it is defeated
Voltage is relatively stable out, mainly to fuse network, RC oscillator, frequency divider power supply, so that RC oscillator frequency is with power supply
Voltage fluctuation is smaller, there is stable RC oscillator frequency, burns chip when being beneficial to prevent power supply line and reversed ground wire, with
And the gate voltage of stabilized driving NMOS tube to drive NMOS tube driving current more stable.
Fuse network: fuse network is made of several fuses and switch arrays, different fuse combinations, corresponding corresponding
Switch arrays, to control the frequency of RC oscillator.
RC oscillator: generating frequency of oscillation, and frequency of oscillation is controlled by fuse network.
Frequency divider: dividing RC oscillator, determines frequency divider according to the frequency of output and RC oscillator frequency
Series, the series of appropriately designed RC oscillator and frequency divider are conducive to the consistency for improving RC oscillator frequency and save core
Piece cost is conducive to the consistency for improving RC oscillator frequency if the design appropriate of the capacitor in RC is larger.
Afterflow device: this afterflow device provides freewheeling path when driving NMOS tube cut-off for inductive load, in order to prevent
Buzzer curent change when sharp cut-off is too big, causes the induced electromotive force generated excessive, and driving draining end of NMOS tube needs to add
Enter afterflow device and freewheeling path is provided, to reduce the induced electromotive force of generation, afterflow device can be diode, or driving
The diode connection of NMOS tube or the diode connection of triode.
External capacitor: it acts as charge is stored when driving NMOS tube cut-off, electricity is provided when driving NMOS transistor conduction
Lotus gives circuit power supply, plays the role of pressure stabilizing, avoids the too many of when drive NMOS transistor conduction supply voltage decline, while also having
When driving NMOS tube cut-off, the effect of smooth power line voltage, to prevent circuit to be burned out.
In embodiment, afterflow device is diode, as shown in Figure 2.
A kind of high-performance buzzer drive circuit provided by the invention, the Integrated circuit portion in dotted line frame shown in Fig. 1, i.e.,
Driving chip of the invention is applicable to SOT23 encapsulation, as shown in Figure 3 and Figure 4.
As shown in figure 5, in practical applications, one end connection power supply and the other end and driving circuit of buzzer electromagnetic coil
Output end connection, the one termination power other end of external capacitor ground connection, drive circuit chip, i.e. integrated electricity in Fig. 1 dotted line frame
Road, output termination buzzer electromagnetic coil one end, drive circuit chip another two pin connect power supply and ground wire respectively.
In conclusion buzzer drive circuit provided by the invention by voltage regulator circuit to fuse network, RC oscillator, point
The power supply of frequency device, makes the frequency of oscillation stability of RC oscillator be improved significantly, so that the most of logic circuits of circuit obtain
It avoids power supply from crossing great fluctuation process and burn, burns chip when being beneficial to prevent power supply line and reversed ground wire；Adjusting can also be passed through
The series of frequency divider suitably to adjust the design parameter of RC oscillator, is conducive to save the cost and further increases RC oscillator
The consistency of frequency；Because NMOS tube is driven to be powered by prime frequency divider by voltage regulator circuit, the grid electricity of NMOS tube is driven
Press it is more stable, in a certain range not with power-supply fluctuation, so that driving NMOS tube driving current is more stable.
The above description is only an embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (5)
1. a kind of buzzer drive circuit, which is characterized in that including voltage regulator circuit, fuse network, RC oscillator, frequency divider, drive
Dynamic NMOS tube, afterflow device, external capacitor, the fuse network, the RC oscillator, frequency divider feeder ear pass through pressure stabilizing
Road is connected on power supply in circuit connection to power supply, and the output end of the fuse network is connected on the RC oscillator, described
The output end of RC oscillator is connected on the frequency divider, and the output end of the frequency divider is connected to the grid of the driving NMOS tube
On extremely, the source electrode of the driving NMOS tube is grounded and drain electrode is connected on power supply by the afterflow device, the external capacitor
One end ground connection and another termination power, the output end of driving circuit be connected to driving NMOS tube drain electrode.
2. buzzer drive circuit as described in claim 1, which is characterized in that the fuse network is by several fuses and opens
Close array composition, different fuse combinations, corresponding corresponding switch arrays, to control the frequency of RC oscillator.
3. buzzer drive circuit as described in claim 1, which is characterized in that the afterflow device is diode.
4. buzzer drive circuit as described in claim 1, which is characterized in that the afterflow device is drive NMOS tube two
Pole pipe connection.
5. buzzer drive circuit as described in claim 1, which is characterized in that the afterflow device is the diode of triode
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811247461.3A CN109272976B (en) | 2018-10-25 | 2018-10-25 | Buzzer driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811247461.3A CN109272976B (en) | 2018-10-25 | 2018-10-25 | Buzzer driving circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109272976A true CN109272976A (en) | 2019-01-25 |
| CN109272976B CN109272976B (en) | 2023-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811247461.3A Active CN109272976B (en) | 2018-10-25 | 2018-10-25 | Buzzer driving circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN109272976B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518895A (en) * | 2019-08-26 | 2019-11-29 | 无锡天极芯科技有限公司 | A kind of circuit for preventing buzzer driving tube grid voltage from declining |
| CN110609583A (en) * | 2019-08-26 | 2019-12-24 | 无锡十顶电子科技有限公司 | Circuit for stabilizing grid voltage of driving tube by buzzer |
| CN111445893A (en) * | 2020-03-10 | 2020-07-24 | 无锡十顶电子科技有限公司 | High-performance built-in buzzer with oscillator driving chip |
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| US3945004A (en) * | 1974-07-11 | 1976-03-16 | Projects Unlimited, Inc. | High efficiency buzzer |
| EP0472971A2 (en) * | 1990-08-31 | 1992-03-04 | Siemens-Elema AB | Piezoelectric driver using resonant energy transfer |
| CN101685629A (en) * | 2008-09-24 | 2010-03-31 | 无锡华润矽科微电子有限公司 | Drive circuit of piezo buzzer |
| US20120206014A1 (en) * | 2011-02-15 | 2012-08-16 | Fujifilm Dimatix, Inc. | Piezoelectric transducers using micro-dome arrays |
| CN205564278U (en) * | 2015-12-30 | 2016-09-07 | 北京怡和嘉业医疗科技有限公司 | Electromagnetic buzzer drive circuit , buzzing system and breathing machine |
| CN106531140A (en) * | 2016-12-05 | 2017-03-22 | 深圳市泛海三江电子股份有限公司 | Piezoelectric buzzer drive circuit |
| CN208094862U (en) * | 2018-01-26 | 2018-11-13 | 广州市晶凌电子有限公司 | A kind of integrated circuit of steering indicating light driving and buzzer driving |
| CN109272977A (en) * | 2018-10-25 | 2019-01-25 | 无锡十顶电子科技有限公司 | A kind of high-performance buzzer drive circuit |
| CN109412133A (en) * | 2018-10-26 | 2019-03-01 | 无锡天极芯科技有限公司 | A kind of circuit for preventing power supply and ground reversal connection from burning based on buzzer |
| CN112863467A (en) * | 2021-03-05 | 2021-05-28 | 无锡十顶电子科技有限公司 | Low-voltage starting circuit based on buzzer |
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2018
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|---|---|---|---|---|
| US3945004A (en) * | 1974-07-11 | 1976-03-16 | Projects Unlimited, Inc. | High efficiency buzzer |
| EP0472971A2 (en) * | 1990-08-31 | 1992-03-04 | Siemens-Elema AB | Piezoelectric driver using resonant energy transfer |
| CN101685629A (en) * | 2008-09-24 | 2010-03-31 | 无锡华润矽科微电子有限公司 | Drive circuit of piezo buzzer |
| US20120206014A1 (en) * | 2011-02-15 | 2012-08-16 | Fujifilm Dimatix, Inc. | Piezoelectric transducers using micro-dome arrays |
| CN205564278U (en) * | 2015-12-30 | 2016-09-07 | 北京怡和嘉业医疗科技有限公司 | Electromagnetic buzzer drive circuit , buzzing system and breathing machine |
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| CN208094862U (en) * | 2018-01-26 | 2018-11-13 | 广州市晶凌电子有限公司 | A kind of integrated circuit of steering indicating light driving and buzzer driving |
| CN109272977A (en) * | 2018-10-25 | 2019-01-25 | 无锡十顶电子科技有限公司 | A kind of high-performance buzzer drive circuit |
| CN109412133A (en) * | 2018-10-26 | 2019-03-01 | 无锡天极芯科技有限公司 | A kind of circuit for preventing power supply and ground reversal connection from burning based on buzzer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518895A (en) * | 2019-08-26 | 2019-11-29 | 无锡天极芯科技有限公司 | A kind of circuit for preventing buzzer driving tube grid voltage from declining |
| CN110609583A (en) * | 2019-08-26 | 2019-12-24 | 无锡十顶电子科技有限公司 | Circuit for stabilizing grid voltage of driving tube by buzzer |
| CN111445893A (en) * | 2020-03-10 | 2020-07-24 | 无锡十顶电子科技有限公司 | High-performance built-in buzzer with oscillator driving chip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109272976B (en) | 2023-09-05 |
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