CN112863467A - Low-voltage starting circuit based on buzzer - Google Patents
Low-voltage starting circuit based on buzzer Download PDFInfo
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- CN112863467A CN112863467A CN202110244501.4A CN202110244501A CN112863467A CN 112863467 A CN112863467 A CN 112863467A CN 202110244501 A CN202110244501 A CN 202110244501A CN 112863467 A CN112863467 A CN 112863467A
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- buzzer
- oscillator
- frequency divider
- diode
- tube
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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
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- Oscillators With Electromechanical Resonators (AREA)
Abstract
The invention provides a low-voltage starting circuit based on a buzzer, which comprises a diode D1, a resistor R1, an oscillator and a frequency divider. The positive electrode of D1 is connected with the output OUT of the buzzer driving tube, the negative electrode of D1 is connected with a signal line VCC, one end of a resistor R1 is connected with the output OUT of the buzzer driving tube, the other end of the resistor R1 is connected with the signal line VCC, the signal line VCC supplies power to an oscillator and a frequency divider, the output F of the oscillator is connected with the input of the frequency divider, and the output G of the frequency divider is connected with the grid electrode of the buzzer driving tube. This circuit improves the starting voltage through increase resistance R1 between buzzer drive tube output OUT and inside power supply signal line VCC, plays the effect that the circuit low-voltage starts, and this circuit has advantage with low costs and operating voltage is low.
Description
Technical Field
The invention relates to the field of buzzer circuits, in particular to a low-voltage starting circuit based on a buzzer and a buzzer driving chip.
Background
As shown in fig. 6, in order to supply power to the chip internal module and prevent the electromagnetic coil from excessively lowering the power supply inside the chip when the electromagnetic coil is turned on, a diode D1 is added between the output OUT of the buzzer driving tube and the power supply signal line VCC of the internal circuit, the power supply of the circuit needs to pass through a diode D1, the diode D1 can be regarded as a starting device of the buzzer circuit, the power supply has a relatively large voltage drop through the diode, which is about 0.5-0.7V, the general buzzer requires to work when the power supply is below 1.5V, when the power supply is 1.5V, the power supply voltage of the power supply is about 1V after the power supply is dropped through the diode, and under the voltage, the oscillator is difficult to work or abnormal.
Disclosure of Invention
The invention provides a low-voltage starting circuit based on a buzzer, which solves the problem that an oscillator is difficult to work normally when the voltage of a power supply is lower.
In order to solve the above technical problem, the present invention provides a low voltage start circuit based on a buzzer, as shown in fig. 1, including a diode D1, a resistor R1, an oscillator, and a frequency divider, wherein an anode of the diode D1 is connected to a buzzer driving transistor output OUT, a cathode of the diode D1 is connected to a signal line VCC, one end of the resistor R1 is connected to the buzzer driving transistor output OUT, the other end of the resistor R1 is connected to the signal line VCC, the signal line VCC supplies power to the oscillator and the frequency divider, an output F of the oscillator is connected to an input of the frequency divider, and an output G of the frequency divider is connected to a gate of the buzzer driving transistor.
As shown in fig. 1, when the circuit voltage is relatively low, the chip internal module oscillator and the frequency divider are powered by a diode D1, the voltage is significantly low, the oscillator cannot work normally, a resistor R1 is added between the output terminal OUT of the buzzer driving tube and the power supply signal line VCC of the chip internal module oscillator and the frequency divider, the power supply voltage can be increased, the resistance value of the resistor R1 is properly selected, the power supply capacity of the chip internal module oscillator and the frequency divider can be increased, the oscillator can work, and therefore the whole circuit can work normally.
Preferably, the substitute devices of the resistor R1 are: MOS tube and junction field effect tube.
Preferably, the diode D1 has the following alternative devices: diode-connected MOS tube and diode-connected triode.
Preferably, when the oscillator meets the frequency range, the frequency divider is removed, when the buzzer driving tube is an MOS tube, the oscillator outputs F to directly drive the grid electrode of the buzzer driving tube, and when the buzzer driving tube is a triode, the oscillator outputs F to directly drive the base electrode of the buzzer driving tube.
Preferably, when the buzzer driving tube is an MOS tube, the drain electrode of the buzzer driving tube outputs OUT for the buzzer driving tube; when the buzzer driving tube is a triode, the corresponding frequency divider output G is connected with the base electrode of the buzzer driving tube, and the collector electrode of the buzzer driving tube is the buzzer driving tube output OUT.
Drawings
Fig. 1 is a schematic structural diagram of a low-voltage starting circuit based on a buzzer of the invention.
Fig. 2 is a schematic diagram of a low-voltage starting circuit based on a buzzer according to a first embodiment of the invention.
Fig. 3 is a schematic diagram of a low-voltage starting circuit based on a buzzer according to a second embodiment of the invention.
Fig. 4 is a schematic diagram of a low-voltage starting circuit based on a buzzer according to a third embodiment of the invention.
Fig. 5 is a schematic diagram of a low-voltage starting circuit based on a buzzer according to a fourth embodiment of the invention.
Fig. 6 is a schematic diagram of the background art.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the low voltage start-up circuit based on a buzzer provided by the present invention includes a diode D1, a resistor R1, an oscillator, and a frequency divider, wherein the anode of the diode D1 is connected to the buzzer driving tube output OUT, the cathode of the diode D1 is connected to a signal line VCC, one end of the resistor R1 is connected to the driving tube output OUT, the other end of the resistor R1 is connected to the signal line VCC, the signal line VCC supplies power to the oscillator and the frequency divider, the oscillator output F is connected to the input of the frequency divider, the frequency divider output G is connected to the gate of the buzzer driving tube, and the resistor R1 replaces the devices with: the basic functions of the MOS transistor and the jfet are the same as those of the resistor R1, that is, when the diode D1 is short of power supply, the supply voltage is further increased, which is advantageous in that the on-resistance of the diode D1 changes with the voltage change, so as to achieve the effect of resistance adjustment, wherein the diode D1 has the following substitute devices: in a circuit realized by a bipolar process, the type of a buzzer driving tube in fig. 1 can be replaced by an MOS tube, a corresponding frequency divider output G is connected with an NPN base of the buzzer driving tube, a collector of the buzzer driving tube is used as an output OUT of the buzzer driving tube, and the frequency divider is complex, so that when an oscillator meets a frequency range, the frequency divider is removed, and the base of the buzzer driving tube is directly driven by an output F of the oscillator.
The first embodiment of the present invention, as shown in fig. 2: the power supply circuit comprises a diode D1, a resistor R1, an oscillator and a frequency divider, wherein the anode of the diode D1 is connected with the output OUT of an NMOS driving tube of the buzzer, the cathode of the diode D1 is connected with a signal line VCC, one end of the resistor R1 is connected with the output OUT of the NMOS driving tube of the buzzer, the other end of the resistor R1 is connected with the signal line VCC, the signal line VCC supplies power to the oscillator and the frequency divider, the output F of the oscillator is connected to the input of the frequency divider, and the output G of the frequency divider is connected to the grid electrode of the NMOS. The signal wire VCC is externally connected with a capacitor C1, and the other end of the external capacitor C1 is connected with the ground wire.
In the first embodiment of the invention, referring to fig. 2, when the circuit voltage is relatively low, the chip internal module oscillator and the frequency divider are powered by a diode D1, the voltage is significantly low, and the oscillator cannot normally operate, a resistor R1 is added between the output terminal OUT of the NMOS driving tube of the buzzer and the power supply signal line VCC of the chip internal module oscillator and the frequency divider, so that the power supply voltage can be increased, and the resistance value of the resistor R1 is properly selected, so that the power supply capability of the chip internal module oscillator and the frequency divider can be increased, and the oscillator can operate, so that the whole circuit normally operates.
A second embodiment of the invention is shown in fig. 3: the power supply comprises a diode D1, a PMOS tube P1, a PMOS tube P2, a PMOS tube P3, an oscillator and a frequency divider. The positive electrode of a diode D1 is connected with the output OUT of the NMOS driving tube of the buzzer, the negative electrode of a diode D1 is connected with a signal line VCC, the grid electrode of a PMOS tube P1 is connected with a ground wire, the source electrode of a PMOS tube P1 is connected with the output OUT of the NMOS driving tube of the buzzer, the drain electrode of a PMOS tube P1 is connected with the signal line VCC, the substrate of a PMOS tube P1 is connected with a signal line b1, the grid electrode of a PMOS tube P2 is connected with the signal line VCC, the source electrode of a PMOS tube P2 is connected with the output OUT of the NMOS driving tube of the buzzer, the drain electrode of the PMOS tube P2 is connected with the signal line b1, the substrate of the PMOS tube P2 is connected with the signal line b1, the grid electrode of the PMOS tube P3 is connected with the output OUT of the NMOS driving tube of the buzzer, the source electrode of the PMOS tube P3 is connected with the signal line VCC, the drain electrode of the PMOS tube P3 is connected with the signal line b 63. The signal wire VCC is externally connected with a capacitor C1, and the other end of the external capacitor C1 is connected with the ground wire.
In the second embodiment of the invention, referring to fig. 3, when the circuit voltage is relatively low, the chip internal module oscillator and the frequency divider are powered by a diode D1, the voltage is significantly low, and the oscillator cannot normally operate, a PMOS transistor P1 is added between the output terminal OUT of the buzzer driving transistor and the power supply signal line VCC of the chip internal module oscillator and the frequency divider, the gate of the PMOS transistor P1 is connected to the ground, and is in a normally on state, which is equivalent to a resistor, and the voltage of the power supply signal line VCC is increased, and the width-to-length ratio of the PMOS transistor P1 is properly selected, so that the power supply capability of the chip internal module oscillator and the frequency divider can be increased, and the oscillator can operate, and the whole circuit can normally operate.
A third embodiment of the present invention, as shown in fig. 4: the direct current power supply circuit comprises a diode D1, a junction field effect transistor N1, an oscillator and a frequency divider, wherein the anode of the diode D1 is connected with the output OUT of a buzzer driving tube, the cathode of the diode D1 is connected with a signal line VCC, the drain of the junction field effect transistor N1 is connected with the output OUT of the buzzer driving tube, the source of the junction field effect transistor N1 is connected with the signal line VCC, the grid of the junction field effect transistor N1 is connected with a ground wire, the signal line VCC supplies power to the oscillator and the frequency divider, the output F of the oscillator is connected to the input of the frequency divider, and the output G of the frequency divider is. The signal wire VCC is externally connected with a capacitor C1, and the other end of the external capacitor C1 is connected with the ground wire.
In the third embodiment of the invention, referring to fig. 4, when the circuit voltage is relatively low, the oscillator and the frequency divider of the module inside the chip are powered by the diode D1, the voltage is significantly low, and the oscillator cannot normally operate, the jfet N1 is added between the output terminal OUT of the buzzer driving tube and the power supply signal line VCC of the oscillator and the frequency divider of the module inside the chip, so that the power supply voltage is increased, the width-length ratio of the jfet N1 is properly selected, the power supply capability of the oscillator and the frequency divider of the module inside the chip can be increased, and the oscillator can operate, so that the whole circuit normally operates.
The fourth embodiment of the present invention, as shown in fig. 5: the power supply circuit comprises a diode D1, a resistor R1 and an oscillator, wherein the anode of the diode D1 is connected with the output OUT of an NPN driving tube of a buzzer, the cathode of the diode D1 is connected with a signal line VCC, one end of the resistor R1 is connected with the output OUT of the NPN driving tube of the buzzer, the other end of the resistor R1 is connected with the signal line VCC, the signal line VCC supplies power to the oscillator, and the output F of the oscillator is connected with the base of the NPN driving tube of the buzzer.
In the fourth embodiment of the invention, referring to fig. 5, when the circuit voltage is relatively low, the chip internal module oscillator supplies power through a diode D1, the voltage is significantly low, and the oscillator cannot work normally, a resistor R1 is added between the output terminal OUT of the buzzer NPN driving tube and the power supply signal line VCC of the chip internal module oscillator, so that the power supply voltage is increased, and the resistance value of the resistor R1 is properly selected, so that the power supply capability of the chip internal module oscillator can be increased, and the oscillator can work, thereby enabling the whole circuit to work normally.
In summary, according to the low-voltage starting circuit based on the buzzer, provided by the invention, the resistor R1 is added between the output OUT of the buzzer driving tube and the internal power supply signal line VCC, so that the starting voltage is increased, the low-voltage starting function of the circuit is achieved, and the circuit has the advantages of low cost and low working voltage.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (5)
1. The utility model provides a low voltage starting circuit based on bee calling organ which characterized in that, including diode D1, resistance R1, the oscillator, the frequency divider, wherein, diode D1 positive pole is connected bee calling organ drive tube output OUT, diode D1 negative pole connects signal line VCC, bee calling organ drive tube output OUT is connected to resistance R1 one end, signal line VCC is connected to resistance R1 other end, signal line VCC supplies power for oscillator, frequency divider, oscillator output F is connected to the input of frequency divider, the grid is received to bee calling organ drive tube to frequency divider output G.
2. The buzzer-based low voltage start-up circuit of claim 1, wherein said resistor R1 has the following alternative components: MOS transistor, junction field effect transistor.
3. The buzzer-based low voltage start-up circuit as claimed in claim 1, wherein said diode D1 is replaced by diode-connected MOS transistor and diode-connected triode.
4. The buzzer-based low voltage start-up circuit as claimed in claim 1, wherein said frequency divider is removed when said oscillator satisfies the frequency range, the gate of the buzzer driving transistor is directly driven by the oscillator output F when the buzzer driving transistor is a MOS transistor, and the base of the buzzer driving transistor is directly driven by the oscillator output F when the buzzer driving transistor is a triode.
5. The buzzer-based low voltage starting circuit as claimed in claim 1, wherein when the buzzer driving tube is a MOS tube, the drain of the buzzer driving tube is the buzzer driving tube output OUT; when the buzzer driving tube is a triode, the corresponding frequency divider output G is connected with the base electrode of the buzzer driving tube, and the collector electrode of the buzzer driving tube is the buzzer driving tube output OUT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110244501.4A CN112863467A (en) | 2021-03-05 | 2021-03-05 | Low-voltage starting circuit based on buzzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110244501.4A CN112863467A (en) | 2021-03-05 | 2021-03-05 | Low-voltage starting circuit based on buzzer |
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| Publication Number | Publication Date |
|---|---|
| CN112863467A true CN112863467A (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110244501.4A Pending CN112863467A (en) | 2021-03-05 | 2021-03-05 | Low-voltage starting circuit based on buzzer |
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| CN (1) | CN112863467A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109272976A (en) * | 2018-10-25 | 2019-01-25 | 无锡十顶电子科技有限公司 | A kind of buzzer drive circuit |
-
2021
- 2021-03-05 CN CN202110244501.4A patent/CN112863467A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109272976A (en) * | 2018-10-25 | 2019-01-25 | 无锡十顶电子科技有限公司 | A kind of buzzer drive circuit |
| CN109272976B (en) * | 2018-10-25 | 2023-09-05 | 无锡十顶电子科技有限公司 | Buzzer driving circuit |
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