CN110445479A - It is a kind of for stablizing the circuit of buzzer driving tube grid voltage - Google Patents
It is a kind of for stablizing the circuit of buzzer driving tube grid voltage Download PDFInfo
- Publication number
- CN110445479A CN110445479A CN201910789246.4A CN201910789246A CN110445479A CN 110445479 A CN110445479 A CN 110445479A CN 201910789246 A CN201910789246 A CN 201910789246A CN 110445479 A CN110445479 A CN 110445479A
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- Prior art keywords
- tube
- nmos
- buzzer
- diode
- grid
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- 239000000758 substrate Substances 0.000 claims abstract description 8
- 230000007423 decrease Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/021—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of more than one type of element or means, e.g. BIMOS, composite devices such as IGBT
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- Amplifiers (AREA)
Abstract
The present invention provides a kind of for stablizing the circuit of buzzer driving tube grid voltage, including diode D1, PMOS tube MP1, NMOS tube MN1.Wherein, F is frequency signal, and PMOS tube MP1 source electrode is connected to power supply line, and PMOS tube MP1 drain electrode is connected to diode D1 anode, PMOS tube MP1 grid connects F, the substrate of PMOS tube MP1 is connected to power supply, and diode D1 anode is connected to PMOS tube MP1 drain electrode, and diode D1 cathode is connected to buzzer NMOS driving tube grid G, NMOS tube MN1 source electrode is connected to ground wire, NMOS tube MN1 drain electrode is connected to buzzer NMOS driving tube grid G, and NMOS tube MN1 grid connects F, and NMOS tube MN1 substrate is connected to ground wire.The present invention plays the role of preventing buzzer NMOS driving tube grid voltage from supply voltage being followed to decline by the characteristic reversely ended using two end voltage forward conduction of diode.The circuit has the advantages that at low cost and easy to accomplish.
Description
Technical field
The present invention relates to a kind of buzzer circuit fields, and in particular to one kind is for stablizing buzzer driving tube grid voltage
Circuit.
Background technique
As shown in Fig. 2, 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 provide it is a kind of for stablizing the circuit of buzzer driving tube grid voltage, power line voltage decline when,
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 provide it is a kind of for stablizing the circuit of buzzer driving tube grid voltage,
Including diode D1, PMOS tube MP1, NMOS tube MN1.Wherein, F is frequency signal, and PMOS tube MP1 source electrode is connected to power supply line,
PMOS tube MP1 drain electrode is connected to diode D1 anode, and PMOS pipe MP1 grid connects F, and the substrate of PMOS tube MP1 is connected to electricity
Source, diode D1 anode are connected to PMOS pipe MP1 drain electrode, and diode D1 cathode is connected to buzzer NMOS driving tube grid G,
NMOS tube MN1 source electrode is connected to ground wire, and NMOS tube MN1 drain electrode is connected to buzzer NMOS driving tube grid G, NMOS pipe MN1
Grid connects F, and NMOS tube MN1 substrate is connected to ground wire.
Preferably, the diode is at least one.
Bring of the present invention is the utility model has the advantages that provided by the invention a kind of for stablizing the electricity of buzzer driving tube grid voltage
Road, by the characteristic reversely ended using two end voltage forward conduction of diode, playing prevents buzzer NMOS from driving tube grid
The effect of voltage follow supply voltage decline.The circuit has the advantages that at low cost and easy to accomplish.
Detailed description of the invention
Fig. 1 is electrical block diagram of the invention.
Fig. 2 background technique circuit diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing, the present invention is made further
Ground is described in detail.
As shown in Figure 1, the present invention provide it is a kind of for stablizing the circuit of buzzer driving tube grid voltage, including diode
D1, PMOS tube MP1, NMOS tube MN1.Wherein, F is frequency signal, and PMOS tube MP1 source electrode is connected to power supply line, PMOS tube MP1
Drain electrode is connected to diode D1 anode, and PMOS tube MP1 grid connects F, and the substrate of PMOS tube MP1 is connected to power supply, diode D1
Anode is connected to PMOS pipe MP1 drain electrode, and diode D1 cathode is connected to buzzer NMOS driving tube grid G, the source NMOS tube MN1
Pole is connected to ground wire, and NMOS tube MN1 drain electrode is connected to buzzer NMOS driving tube grid G, and NMOS pipe MN1 grid connects F,
NMOS tube MN1 substrate is connected to ground wire.
When chip interior oscillator output signal F is low level, NMOS tube MN1 cut-off, PMOS tube MP1 is opened, power supply
By PMOS tube MP1 and diode D1 to buzzer NMOS driving tube gate charges, buzzer NMOS driving tube is opened, and works as power supply
When voltage declines, diode D1 is in reverse blocking state, and the electric leakage that diode D1 ends buzzer NMOS driving tube grid is logical
Road, so buzzer NMOS driving tube grid voltage will not follow supply voltage to decline together.
In conclusion it is provided by the invention a kind of for stablizing the circuit of buzzer driving tube grid voltage, pass through utilization
The characteristic that two end voltage forward conduction of diode reversely ends, playing prevents buzzer NMOS driving tube grid voltage from following power supply
The effect of voltage decline.The circuit has the advantages that at low cost and easy to accomplish.
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 (2)
1. a kind of for stablizing the circuit of buzzer driving tube grid voltage, including diode D1, PMOS tube MP1, NMOS tube
MN1.Wherein, F is frequency signal, and PMOS tube MP1 source electrode is connected to power supply line, and PMOS tube MP1 drain electrode is being connected to diode D1 just
Pole, PMOS tube MP1 grid connect F, and the substrate of PMOS tube MP1 is connected to power supply, and diode D1 anode is connected to PMOS tube MP1 leakage
Pole, diode D1 cathode are connected to buzzer NMOS driving tube grid G, and NMOS tube MN1 source electrode is connected to ground wire, NMOS tube MN1
Drain electrode is connected to buzzer NMOS driving tube grid G, and NMOS tube MN1 grid connects F, and NMOS tube MN1 substrate is connected to ground wire.
2. as described in claim 1 for stablizing the circuit of buzzer driving tube grid voltage, which is characterized in that two pole
Pipe D1 is at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910789246.4A CN110445479A (en) | 2019-08-26 | 2019-08-26 | It is a kind of for stablizing the circuit of buzzer driving tube grid voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910789246.4A CN110445479A (en) | 2019-08-26 | 2019-08-26 | It is a kind of for stablizing the circuit of buzzer driving tube grid voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110445479A true CN110445479A (en) | 2019-11-12 |
Family
ID=68437522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910789246.4A Pending CN110445479A (en) | 2019-08-26 | 2019-08-26 | It is a kind of for stablizing the circuit of buzzer driving tube grid voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110445479A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030048670A1 (en) * | 2001-06-01 | 2003-03-13 | Stmicroelectronics S.R.L. | Output buffer for a nonvolatile memory with output signal switching noise reduction, and nonvolatile memory comprising the same |
| CN1956098A (en) * | 2005-08-02 | 2007-05-02 | 株式会社瑞萨科技 | Semiconductor storage device |
| CN101267201A (en) * | 2008-05-14 | 2008-09-17 | 威盛电子股份有限公司 | Level regulator |
| CN101521487A (en) * | 2008-02-28 | 2009-09-02 | 原景科技股份有限公司 | Pre-posing circuit in audio power amplifier |
| CN109861503A (en) * | 2019-02-28 | 2019-06-07 | 深圳市泰德半导体有限公司 | Driving circuit for power device |
| CN210867619U (en) * | 2019-08-26 | 2020-06-26 | 无锡天极芯科技有限公司 | Circuit for stabilizing grid voltage of buzzer driving tube |
-
2019
- 2019-08-26 CN CN201910789246.4A patent/CN110445479A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030048670A1 (en) * | 2001-06-01 | 2003-03-13 | Stmicroelectronics S.R.L. | Output buffer for a nonvolatile memory with output signal switching noise reduction, and nonvolatile memory comprising the same |
| CN1956098A (en) * | 2005-08-02 | 2007-05-02 | 株式会社瑞萨科技 | Semiconductor storage device |
| CN101521487A (en) * | 2008-02-28 | 2009-09-02 | 原景科技股份有限公司 | Pre-posing circuit in audio power amplifier |
| CN101267201A (en) * | 2008-05-14 | 2008-09-17 | 威盛电子股份有限公司 | Level regulator |
| CN109861503A (en) * | 2019-02-28 | 2019-06-07 | 深圳市泰德半导体有限公司 | Driving circuit for power device |
| CN210867619U (en) * | 2019-08-26 | 2020-06-26 | 无锡天极芯科技有限公司 | Circuit for stabilizing grid voltage of buzzer driving tube |
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