CN214752918U - Low-voltage starting circuit based on buzzer - Google Patents
Low-voltage starting circuit based on buzzer Download PDFInfo
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- CN214752918U CN214752918U CN202120477307.6U CN202120477307U CN214752918U CN 214752918 U CN214752918 U CN 214752918U CN 202120477307 U CN202120477307 U CN 202120477307U CN 214752918 U CN214752918 U CN 214752918U
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Abstract
The utility model provides a based on buzzer low voltage starting circuit, including diode D1, resistance R1, oscillator, 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 utility model relates to a buzzer circuit field, concretely relates to based on buzzer low-voltage starting circuit and buzzer driver 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.
SUMMERY OF THE UTILITY MODEL
The utility model provides a based on buzzer low-voltage starting circuit, when mains voltage is lower to solve the problem that the oscillator is difficult to normal work.
For solving the technical problem, the utility model provides a based on buzzer low-voltage starting circuit, as shown in FIG. 1, including diode D1, resistance R1, the oscillator, the frequency divider, wherein, the anodal buzzer drive tube output OUT of connecting of diode D1, diode D1 negative pole connect signal line VCC, buzzer drive tube output OUT is connected to resistance R1 one end, signal line VCC is connected to the resistance R1 other end, the oscillator is given to signal line VCC, the frequency divider power supply, oscillator output F is connected to the input of frequency divider, buzzer drive tube grid is received to frequency divider output G.
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 the low-voltage starting circuit based on the buzzer of the present invention.
Fig. 2 is a schematic diagram of a low-voltage starting circuit based on a buzzer according to the first embodiment of the present invention.
Fig. 3 is a schematic diagram of a low-voltage starting circuit based on a buzzer according to a second embodiment of the present invention.
Fig. 4 is a schematic diagram of a low-voltage starting circuit based on a buzzer according to a third embodiment of the present invention.
Fig. 5 is a schematic diagram of a low-voltage starting circuit based on a buzzer according to a fourth embodiment of the present 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 clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the utility model provides a pair of based on buzzer low-voltage starting circuit, including diode D1, resistance R1, the oscillator, the frequency divider, wherein, diode D1 anodal buzzer drive tube output OUT of connecting, diode D1 negative pole connect the signal line VCC, drive tube output OUT is connected to resistance R1 one end, signal line VCC is connected to the resistance R1 other end, the signal line VCC gives the oscillator, the frequency divider power supply, oscillator output F is connected to the input of frequency divider, buzzer drive tube grid is received to frequency divider output G, wherein resistance R1 substitution device has: 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 driving tube. 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.
The utility model discloses a first embodiment combines fig. 2, when circuit voltage ratio is lower, chip inside module oscillator and frequency divider pass through diode D1 power supply, voltage can obviously be on the low side, the oscillator can not normally work, increase resistance R1 between the power supply signal line VCC of buzzer NMOS drive tube output OUT and chip inside module oscillator and frequency divider, can improve supply voltage, suitably select resistance R1's resistance, can increase the power supply ability of chip inside module oscillator and frequency divider, make the oscillator work, thereby make whole circuit normally work.
The second embodiment of the present 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 the 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, a PMOS tube P1 substrate is connected with the 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 a 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 b1, the substrate P3 is connected with the signal line b1, the signal line VCC is used for supplying power to the oscillator and the frequency divider. 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.
The utility model discloses a second embodiment combines fig. 3, when circuit voltage ratio is lower, chip inside module oscillator and frequency divider pass through diode D1 power supply, voltage can obviously be on the low side, the oscillator can not normally work, increase PMOS pipe P1 between the power supply signal line VCC of buzzer drive tube output OUT and chip inside module oscillator and frequency divider, PMOS pipe P1 grid ground wire, be in normal open state, be equivalent to resistance, can improve the voltage of power supply signal line VCC, suitably select PMOS pipe P1's width-length ratio, can increase the power supply ability of chip inside module oscillator and frequency divider, make the oscillator work, thereby make whole circuit normally work.
The third embodiment of the present invention is 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 connected to the grid of the buzzer driving tube. 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.
The utility model discloses a third embodiment combines figure 4, when circuit voltage ratio is lower, chip inside module oscillator and frequency divider pass through diode D1 power supply, voltage can obviously be on the low side, the oscillator can not normally work, increase junction field effect transistor N1 between the power supply signal line VCC of buzzer drive tube output OUT and chip inside module oscillator and frequency divider, can improve supply voltage, suitably select junction field effect transistor N1's width-length ratio, can increase the power supply capacity of chip inside module oscillator and frequency divider, make the oscillator work, thereby make whole circuit normally work.
The fourth embodiment of the present invention is 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.
The utility model discloses a fourth embodiment combines fig. 5, when circuit voltage ratio is lower, the module oscillator in the chip passes through diode D1 power supply, voltage can obviously be on the low side, the oscillator can not normally work, increase resistance R1 between the power supply signal line VCC of buzzer NPN drive tube output OUT and the module oscillator in the chip, can improve supply voltage, suitably select resistance R1's resistance, can increase the power supply ability of the module oscillator in the chip, make the oscillator work, thereby make whole circuit normally work.
To sum up, the utility model provides a pair of based on buzzer low-voltage starting circuit through increase resistance R1 between buzzer drive tube output OUT and inside power supply signal line VCC, improves starting voltage, plays the effect that the circuit low-voltage starts, and this circuit has advantage with low costs and operating voltage is low.
The above description is only an example of the present invention, and is not intended to limit the present invention, and those skilled in the art can make various modifications and variations. 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 a diode-connected MOS transistor and a 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 |
|---|---|---|---|
| CN202120477307.6U CN214752918U (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 |
|---|---|---|---|
| CN202120477307.6U CN214752918U (en) | 2021-03-05 | 2021-03-05 | Low-voltage starting circuit based on buzzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214752918U true CN214752918U (en) | 2021-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120477307.6U Active CN214752918U (en) | 2021-03-05 | 2021-03-05 | Low-voltage starting circuit based on buzzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214752918U (en) |
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2021
- 2021-03-05 CN CN202120477307.6U patent/CN214752918U/en active Active
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