CN110492881A - A kind of circuit based on buzzer stabilized driving tube grid voltage - Google Patents
A kind of circuit based on buzzer stabilized driving tube grid voltage Download PDFInfo
- Publication number
- CN110492881A CN110492881A CN201910788576.1A CN201910788576A CN110492881A CN 110492881 A CN110492881 A CN 110492881A CN 201910788576 A CN201910788576 A CN 201910788576A CN 110492881 A CN110492881 A CN 110492881A
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- Prior art keywords
- tube
- grid
- buzzer
- logic control
- control circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/003—Modifications for increasing the reliability for protection
- H03K19/00369—Modifications for compensating variations of temperature, supply voltage or other physical parameters
- H03K19/00384—Modifications for compensating variations of temperature, supply voltage or other physical parameters in field effect transistor circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
- H03K19/08—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices
- H03K19/094—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices using field-effect transistors
- H03K19/09421—Diode field-effect transistor logic
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Power Engineering (AREA)
- Semiconductor Integrated Circuits (AREA)
Abstract
The present invention provides a kind of circuit based on buzzer stabilized driving tube grid voltage, including logic control circuit, diode D1, PMOS tube MP1, PMOS tube MP2, NMOS tube MN1.Wherein, the grid of buzzer NMOS driving tube is G, the input F of logic control circuit is frequency signal, the output P1 of logic control circuit is connected to the grid of MP1, the output P2 of logic control circuit is connected to the grid of MP2, the output N1 of logic control circuit is connected to the grid of MN1, diode D1 anode is connected to power supply line, diode D1 cathode is connected to the substrate of MP1 and MP2, and the source electrode of MP1 is connected to power supply line, and the drain electrode of MP1 is connected to G, the drain electrode of MP2 is connected to P1, the source electrode of MP2 is connected to G, and the source electrode of MN1 is connected to ground wire, and the drain electrode of MN1 connects G.The present invention controls the grid of tri- metal-oxide-semiconductors of MP1, MP2, MN1 by logic control circuit, and plays the role of preventing buzzer NMOS driving tube grid voltage from declining jointly in conjunction with diode D1.The circuit has the advantages that save area and operating voltage is low.
Description
Technical field
The present invention relates to a kind of buzzer circuit fields, and in particular to one kind is based on buzzer stabilized driving tube grid voltage
Circuit.
Background technique
As shown in figure 4, the gate driving circuit of traditional buzzer driving tube, when power line voltage decline, buzzer
The grid voltage of driving tube follows power line voltage to decline together, insufficient so as to cause the driving capability of buzzer driving tube, very
The unstable of buzzer output frequency can extremely be caused.
Summary of the invention
The present invention provides a kind of circuit based on buzzer stabilized driving tube grid voltage, in power line voltage decline,
To solve the problems, such as that the grid voltage of buzzer driving tube follows power line voltage to decline together, to prevent supply voltage from declining
When, the driving capability of buzzer driving tube is insufficient, or even can cause the unstable of buzzer output frequency.
In order to solve the above technical problems, the present invention provides a kind of circuit based on buzzer stabilized driving tube grid voltage,
Including logic control circuit, diode D1, PMOS tube MP1, PMOS tube MP2, NMOS tube MN1.Wherein, logic control circuit is defeated
Entering F is frequency signal, and the output P1 of logic control circuit is connected to the grid of PMOS tube MP1, the output P2 of logic control circuit
It is connected to the grid of PMOS tube MP2, the output N1 of logic control circuit is connected to the grid of NMOS tube MN1, and diode D1 is just
Pole is connected to power supply line, and the cathode of diode D1 is connected to the substrate of PMOS tube MP1 and PMOS tube MP2, the source electrode of PMOS tube MP1
It is connected to power supply line, the drain electrode of PMOS tube MP1 is connected to the grid G of buzzer NMOS driving tube, the drain electrode connection of PMOS tube MP2
To the grid of PMOS tube MP1, the source electrode of PMOS tube MP2 is connected to the grid G of buzzer NMOS driving tube, the source of NMOS tube MN1
Pole is connected to ground wire, the grid G of the drain electrode connection buzzer NMOS driving tube of NMOS tube MN1.
Preferably, the diode is at least one.
Preferably, the source of described metal-oxide-semiconductor MP1, MP2, MN1 and drain terminal are to change place.
Bring of the present invention is the utility model has the advantages that a kind of electricity based on buzzer stabilized driving tube grid voltage provided by the invention
Road, by logic control circuit control tri- metal-oxide-semiconductors of MP1, MP2, MN1 grid, and in conjunction with diode D1 play jointly it is anti-
Only buzzer NMOS driving tube grid voltage follows the effect that supply voltage declines together, has operating voltage in normal use
Low, at low cost advantage.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the circuit of the invention based on buzzer stabilized driving tube grid voltage.
Fig. 2 is the circuit sequence signal according to a first embodiment of the present invention based on buzzer stabilized driving tube grid voltage
Figure.
Fig. 3 is the circuit sequence signal based on buzzer stabilized driving tube grid voltage according to a second embodiment of the present invention
Figure.
Fig. 4 background technique schematic diagram.
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 circuit based on buzzer stabilized driving tube grid voltage provided by the invention, including logic
Control circuit, diode D1, PMOS tube MP1, PMOS tube MP2, NMOS tube MN1.Wherein, the input F of logic control circuit is frequency
Rate signal, the output P1 of logic control circuit are connected to the grid of PMOS tube MP1, and the output P2 of logic control circuit is connected to
The grid of PMOS tube MP2, the output N1 of logic control circuit are connected to the grid of NMOS tube MN1, the anode connection of diode D1
To power supply line, the cathode of diode D1 is connected to the substrate of PMOS tube MP1 and PMOS tube MP2, and the source electrode of PMOS tube MP1 is connected to
Power supply line, the drain electrode of PMOS tube MP1 are connected to the grid G of buzzer NMOS driving tube, and the drain electrode of PMOS tube MP2 is connected to PMOS
The grid of pipe MP1, the source electrode of PMOS tube MP2 are connected to the grid G of buzzer NMOS driving tube, the source electrode connection of NMOS tube MN1
To ground wire, the grid G of the drain electrode connection buzzer NMOS driving tube of NMOS tube MN1.
The first embodiment of the present invention: for working sequence as shown in Fig. 2, in conjunction with Fig. 1, F is the frequency letter that chip interior generates
Number, when F level change opens buzzer NMOS driving tube, i.e. the initial time of t1, the output P1 of logic control circuit,
N1 is changed into low level by high level, and the output P2 of logic control circuit is high level, and circuit is by PMOS tube MP1 by power supply pair
The grid G of buzzer NMOS driving tube charges, and the grid G voltage of buzzer NMOS driving tube rises, and buzzer NMOS drives
Dynamic Guan Kaiqi, at the end of a period moment of t1, the i.e. initial time of t2, the port output P1 of logic control circuit is high-impedance state, such as
In Fig. 2 shown in P1 signal wire dotted line, P1 signal wire dotted line represents the port output P1 of logic control circuit as high-impedance state, in t2
The end of a period moment, the output P2 of logic control circuit is converted to low level by high level, due to the grid of buzzer NMOS driving tube
Electrode capacitance is more much larger than the grid capacitance of PMOS tube MP1, so the grid capacitance of buzzer NMOS driving tube passes through PMOS tube MP2
It charges to the grid of PMOS tube MP1, P1 is charged to high level, when because supply voltage drops to buzzer NMOS driving tube
Grid voltage below when, since PMOS tube MP1, NMOS tube MN1 end, the port output P1 of logic control circuit is high resistant shape
State and PMOS tube MP1, PMOS tube MP2 substrate pass through back biased diode D1 and are connected to power supply line, so buzzer NMOS drives
Tube grid voltage will not follow supply voltage to decline together.
The second embodiment of the present invention: for working sequence as shown in figure 3, in conjunction with Fig. 1, F is the frequency letter that chip interior generates
Number, when F level change opens buzzer NMOS driving tube, i.e. the initial time of t1, the output P1 of logic control circuit,
N1 is changed into low level by high level, and the output P2 of logic control circuit is high level, and circuit is by PMOS tube MP1 to buzzer
The grid G of NMOS driving tube charges, and the grid G voltage of buzzer NMOS driving tube rises, and buzzer NMOS driving tube is opened
It opens, at the end of a period moment of t1, the port output P1 of logic control circuit is high-impedance state, as shown in P1 signal wire dotted line in Fig. 2,
P1 signal wire dotted line represents the port output P1 of logic control circuit as high-impedance state, and the output P2 of logic control circuit is by high electricity
Flat turn is changed to low level, since the grid capacitance of buzzer NMOS driving tube is more much larger than the grid capacitance of PMOS tube MP1, so
The grid capacitance of buzzer NMOS driving tube is charged by grid of the PMOS tube MP2 to PMOS tube MP1, and P1 is charged to high electricity
It is flat, when below the grid voltage for dropping to buzzer NMOS driving tube because of supply voltage, due to PMOS tube MP1, NMOS tube
MN1 cut-off, the port output P1 of logic control circuit are high-impedance state and PMOS tube MP1, PMOS tube MP2 substrate by anti-
Inclined diode D1 is connected to power supply line, so buzzer NMOS driving tube grid voltage will not follow supply voltage to decline together.
In conclusion a kind of circuit based on buzzer stabilized driving tube grid voltage provided by the invention, passes through logic
Control circuit controls the grid of tri- metal-oxide-semiconductors of MP1, MP2, MN1, and plays jointly in conjunction with diode D1 and prevent buzzer NMOS
Driving tube grid voltage follows the effect that supply voltage declines together, with low, the at low cost advantage of operating voltage.
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 (3)
1. a kind of circuit based on buzzer stabilized driving tube grid voltage, including logic control circuit, diode D1, PMOS tube
MP1, PMOS tube MP2, NMOS tube MN1.Wherein, the input F of logic control circuit is frequency signal, the output of logic control circuit
P1 is connected to the grid of PMOS tube MP1, and the output P2 of logic control circuit is connected to the grid of PMOS tube MP2, logic control electricity
The output N1 on road is connected to the grid of NMOS tube MN1, and the anode of diode D1 is connected to power supply line, the cathode connection of diode D1
To the substrate of PMOS tube MP1 and PMOS tube MP2, the source electrode of PMOS tube MP1 is connected to power supply line, the drain electrode connection of PMOS tube MP1
To the grid G of buzzer NMOS driving tube, the drain electrode of PMOS tube MP2 is connected to the grid of PMOS tube MP1, the source of PMOS tube MP2
Pole is connected to the grid G of buzzer NMOS driving tube, and the source electrode of NMOS tube MN1 is connected to ground wire, the drain electrode connection of NMOS tube MN1
The grid G of buzzer NMOS driving tube.
2. the circuit as described in claim 1 based on buzzer stabilized driving tube grid voltage, which is characterized in that the second level
Pipe D1 is at least one.
3. the circuit as described in claim 1 based on buzzer stabilized driving tube grid voltage, which is characterized in that metal-oxide-semiconductor
The source and drain terminal of MP1, MP2, MN1 do not influence circuit normal work on change place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910788576.1A CN110492881A (en) | 2019-08-26 | 2019-08-26 | A kind of circuit based on buzzer stabilized driving tube grid voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910788576.1A CN110492881A (en) | 2019-08-26 | 2019-08-26 | A kind of circuit based on buzzer stabilized driving tube grid voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110492881A true CN110492881A (en) | 2019-11-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910788576.1A Pending CN110492881A (en) | 2019-08-26 | 2019-08-26 | A kind of circuit based on buzzer stabilized driving tube grid voltage |
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| Country | Link |
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| CN (1) | CN110492881A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063330A (en) * | 2020-01-22 | 2020-04-24 | 无锡十顶电子科技有限公司 | Buzzer driving circuit for enhancing driving capability in low voltage |
| CN111128105A (en) * | 2019-11-29 | 2020-05-08 | 深圳南云微电子有限公司 | Electromagnetic buzzer |
-
2019
- 2019-08-26 CN CN201910788576.1A patent/CN110492881A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111128105A (en) * | 2019-11-29 | 2020-05-08 | 深圳南云微电子有限公司 | Electromagnetic buzzer |
| CN111128105B (en) * | 2019-11-29 | 2022-09-23 | 深圳南云微电子有限公司 | Electromagnetic buzzer |
| CN111063330A (en) * | 2020-01-22 | 2020-04-24 | 无锡十顶电子科技有限公司 | Buzzer driving circuit for enhancing driving capability in low voltage |
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