CN109584853A - A kind of piezo drive integrated circult and electronic equipment - Google Patents
A kind of piezo drive integrated circult and electronic equipment Download PDFInfo
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Abstract
A kind of piezo drive integrated circult and electronic equipment, including electrification reset module, RC oscillation module, frequency division module, switch control signal generation module and drive module generate the primary sinusoid signal of first frequency when RC oscillation module powers on；Frequency division module generates the second sine wave signal of second frequency according to the sine wave signal of piezo drive integrated circult first frequency；Electrification reset voltage signal is generated when electrification reset module powers on, so that frequency division module resets；Switch control signal generation module generates switch control signal according to by key control signal；Drive module generates driving signal according to switch control signal and the second sine wave signal to drive piezo to work；By the way that switch module to be integrated in inside piezo drive integrated circult, small product size is reduced while reducing the component of peripheral circuit；In addition, improving the processing efficiency of product, production cost is also reduced.
Description
Technical field
The invention belongs to technical field of integrated circuits more particularly to a kind of piezo drive integrated circults and electronic equipment.
Background technique
Currently, as shown in Figure 1, piezo drive integrated circult using external high-voltage three-pole pipe drive integrated circult
1, drive integrated circult 1 exports the square wave BZB of fixed frequency to control the switch of high-voltage three-pole pipe Q, and then carries out to inductance L1
Charge and discharge, so that for driving the frequency of the square wave BZ of piezo identical as the frequency of square wave BZB, and due to the liter of inductance L1
Pressure effect makes the level potential of square wave BZ be much higher than the level potential of square wave BZB, so as to drive piezo to work；However,
External in drive integrated circult 1 increases resistance R and high-voltage three-pole pipe Q to meet high voltage required for driving piezo, no
Only make the various complexity of the component of peripheral circuit, high production cost, and external resistance R and high-voltage three-pole pipe Q will cause production
Product volume is big, is unable to satisfy the requirement that small product size is small, highly integrated.
Therefore, there are the various complexity of the component of peripheral circuit for the piezo drive integrated circult in traditional technical solution
And the problem for causing small product size huge.
Summary of the invention
The present invention provides a kind of piezo drive integrated circult and electronic equipment, it is intended to solve in traditional technical solution
Piezo drive integrated circult has that the component of peripheral circuit is various complicated and causes small product size huge.
The invention is realized in this way a kind of piezo drive integrated circult, comprising:
The RC oscillation module of the primary sinusoid signal of first frequency is generated when for powering on；
It is connect with the RC oscillation module, for generating second frequency according to the primary sinusoid signal of the first frequency
The second sine wave signal frequency division module；
For according to the switch control signal generation module for generating switch control signal by key control signal；
It is connect with the frequency division module, the switch control signal generation module and the piezo, for according to institute
It states switch control signal and second sine wave signal generates driving signal to drive the drive module of the piezo work；
And
It being connect with the frequency division module, electrification reset voltage signal is generated when for powering on, so that the frequency division module is multiple
The electrification reset module of position.
In addition, a kind of electronic equipment is additionally provided, including above-mentioned piezo drive integrated circult.
Above-mentioned piezo drive integrated circult generates the primary sinusoid signal of first frequency by RC oscillation module,
Electrification reset module generates electrification reset voltage signal when powering on so that frequency division module resets, to make frequency division module according to the
The primary sinusoid signal of one frequency generates the second sine wave signal of second frequency, and passes through switch control signal generation module
Switch control signal is generated according to by key control signal, so that drive module be made to believe according to switch control signal and the second sine wave
Number generate driving signal to drive piezo to work；By the way that drive module is integrated in inside piezo drive integrated circult,
Small product size is reduced while reducing the component of peripheral circuit；In addition, improving the processing efficiency of product, production is also reduced
Cost.
Detailed description of the invention
Fig. 1 is the circuit diagram of piezo drive integrated circult in the prior art；
Fig. 2 is the module diagram for the piezo drive integrated circult that one embodiment of the invention provides；
Fig. 3 is the circuit diagram for the piezo drive integrated circult that one embodiment of the invention provides；
Fig. 4 be another embodiment of the present invention provides piezo drive integrated circult circuit diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 2 shows the module diagrams for the piezo drive integrated circult that present pre-ferred embodiments provide, in order to just
In explanation, only the parts related to this embodiment are shown, and details are as follows:
With reference to Fig. 2, a kind of piezo drive integrated circult, comprising: electrification reset module 100, is divided RC oscillation module 200
Frequency module 300, switch control signal generation module 400 and drive module 500.
Wherein, the primary sinusoid signal of first frequency is generated when RC oscillation module 200 is used to power on；Frequency division module 300
It is connect with RC oscillation module 200, for generating the second frequency according to the sine wave signal of piezo drive integrated circult first frequency
Second sine wave signal of rate；Electrification reset module 100 is connect with frequency division module 300, and electrification reset electricity is generated when for powering on
Signal is pressed, so that frequency division module 300 resets；Switch control signal generation module 400 is used to open according to by the generation of key control signal
Close control signal；Drive module 500 is connect with frequency division module 300, switch control signal generation module 400 and piezo, is used
In generating driving signal according to switch control signal and the second sine wave signal to drive piezo to work.In specific embodiment
In, when switch control signal is low level, drive module 500 forbids frequency division module 300 to export the second sine wave signal, thus
Make the driving signal low level of output, and then makes that piezo is driven not work；When switch control signal is high level, driving
Module 500 generates square wave identical with the second sine wave signal frequency according to switch control signal and the second sine wave signal and drives
Signal, and then make to drive piezo work.
In the present embodiment, the primary sinusoid signal of first frequency, electrification reset mould are generated by RC oscillation module 200
Block 100 generates electrification reset voltage signal when powering on so that frequency division module 300 resets, to make frequency division module 300 according to the
The primary sinusoid signal of one frequency generates the second sine wave signal of second frequency, and passes through switch control signal generation module
400 according to by key control signal generate switch control signal, thus make drive module 500 according to switch control signal and second just
String wave signal generates driving signal to drive piezo to work；By the way that drive module 500 is integrated in the integrated electricity of piezo driving
Inside road, small product size is reduced while reducing the component of peripheral circuit；In addition, the processing efficiency of product is improved,
Reduce production cost.
Fig. 3 is referred in one of the embodiments, and RC oscillation module 200 includes: the first NAND gate NAND, first resistor
R1, first capacitor C1, the first phase inverter INV1, the second phase inverter INV2, third phase inverter INV3 and the 4th phase inverter INV4；
The first input end of first NAND gate NAND accesses power supply signal, the first end of first resistor R1 and the first end of first capacitor C1
It is connected to the second input terminal of the first NAND gate NAND, the input of the output end of the first NAND gate NAND and the first phase inverter INV1 altogether
End connection, the output end of the first phase inverter INV1 and the first end of first capacitor C1 are connected to the input of the second phase inverter INV2 altogether
End, the output end of the second phase inverter INV2 and the second end of first resistor R1 are connected to the input terminal of third phase inverter INV3 altogether, the
The output end of three phase inverter INV3 is connect with the input terminal of the 4th phase inverter INV4, and the output end of the 4th phase inverter INV4 is RC vibration
Swing the output end of module 200.The sine wave signal of output certain frequency may be implemented in the RC oscillation module 200 of the present embodiment, and
And the resistance value of adjusting first resistor R1 and the capacitance of first capacitor C1 can change the frequency of exported sine wave signal.
Fig. 3 is referred in one of the embodiments, and electrification reset module 100 includes: the second field-effect tube Q2, the second electricity
Hold C2, the first Schmitt trigger SMIL, the 5th phase inverter INV5 and hex inverter INV6；Second field-effect tube Q2's is defeated
Enter and terminate into power supply signal, the control terminal of the second field-effect tube Q2 connects ground, the output end of the second field-effect tube Q2 and the second electricity
The first end for holding C2 is connected to the input terminal of the first Schmitt trigger SMIL altogether, and the second end of the second capacitor C2 connects ground, and first
The output end of Schmitt trigger SMIL is connect with the input terminal of the 5th phase inverter INV5, the output end of the 5th phase inverter INV5 with
The input terminal of hex inverter INV6 connects, and the output end of hex inverter INV6 is the reset signal of electrification reset module 100
Output end.The electrification reset module 100 of the present embodiment realizes output electrification reset voltage signal so that frequency division module 300 resets,
To make frequency division module 300 return to init state.
Fig. 3 is referred in one of the embodiments, and frequency division module 300 includes: two divided-frequency unit 301, the 7th phase inverter
INV7, the 8th phase inverter INV8 and the 9th phase inverter INV9；The first signal input part and the 7th reverse phase of two divided-frequency unit 301
The input terminal of device INV7 connects the first input end for constituting frequency division module 300 altogether and accesses the second sine wave signal, the 7th phase inverter
The output end of INV7 is connect with the second signal input terminal of two divided-frequency unit 301, the RESET input of two divided-frequency unit 301 with it is upper
The reset signal output end of reset module 100 connects, the first output end of two divided-frequency unit 301 and the 8th phase inverter INV8's
Input terminal connection, the output end of the 8th phase inverter INV8 are connect with the input terminal of the 9th phase inverter INV9, the 9th phase inverter INV9
Output end be frequency division module 300 output end.The frequency division module 300 of the present embodiment can be to the sine wave signal of certain frequency
Frequency dividing operation is carried out to reduce the frequency of sine wave signal, to obtain the optimal sine wave signal of frequency to drive piezo work
Make, and then obtains optimal driving effect.
In specific one embodiment, with reference to Fig. 4, two divided-frequency unit 301 includes: multiple two-dividers, and each two points
The first signal input part and the first signal output end of frequency device are sequentially connected respectively, the second signal input terminal of each two-divider
It is sequentially connected respectively with second signal output end, the RESET input of each two-divider connects altogether constitutes two divided-frequency unit 301
The RESET input.The two divided-frequency unit 301 of the present embodiment can the sine wave signal to certain frequency carry out frequency dividing operation to drop
The frequency of low sine wave signal.In a particular embodiment, two divided-frequency unit 301 includes 8 two-dividers, such as RC oscillation mode
When the frequency for the sine wave signal that block 200 exports is 512KHz, can get frequency after the frequency dividing operation of 8 two-dividers is
The sine wave signal of 2KHz.
Fig. 3 is referred in one of the embodiments, and switch control signal generation module 400 includes: third field-effect tube
Q3, the tenth phase inverter INV10 and the 11st phase inverter INV11；The input terminal of third field-effect tube Q3 accesses power supply signal, the
The control terminal of three field-effect tube Q3 connects ground, and the output end of third field-effect tube Q3 and the input terminal of the tenth phase inverter INV10 are total
It connects the input terminal for constituting switch control signal generation module 400 and accesses by key control signal, the output of the tenth phase inverter INV10
End is connect with the input terminal of the 11st phase inverter INV11, and the output end of the 11st phase inverter INV11 is switch control signal generation
The output end of module 400.The present embodiment can press key control signal using key switch input.
Fig. 3 is referred in one of the embodiments, and drive module 500 includes: the first field-effect tube Q1, the first nor gate
NOR, the 12nd phase inverter INV12 and the 13rd phase inverter INV13；The first input end of first nor gate NOR is driving mould
The first input end of block 500, the second input terminal of the first nor gate NOR are the second input terminal of drive module 500, first or non-
The output end of door NOR is connect with the input terminal of the 12nd phase inverter INV12, the output end and the tenth of the 12nd phase inverter INV12
The input terminal of three phase inverter INV13 connects, and the output end of the 13rd phase inverter INV13 is the output end of drive module 500.Having
In the embodiment of body, the first field-effect tube Q1 is NMOS tube, the drain electrode of the grid of NMOS tube, the source electrode of NMOS tube and NMOS tube
The respectively input of the control terminal of the first field-effect tube Q1, the output end of the first field-effect tube Q1 and the first field-effect tube Q1
End.The drive module 500 of the present embodiment includes the first field-effect tube Q1, so that the first field-effect tube Q1 is integrated in piezo
In drive integrated circult, small product size is reduced while reducing the component of peripheral circuit, moreover it is possible to improve the processing effect of product
Rate can also reduce production cost.
In addition, a kind of electronic equipment is additionally provided, including above-mentioned piezo drive integrated circult.
Its working principle is illustrated by taking piezo drive integrated circult shown in Fig. 3 as an example below, details are as follows:
When powering on, the second field-effect tube Q2 conducting, by the first Schmitt trigger U1 output electrification reset voltage letter
Number, to reset to two divided-frequency unit 301, two divided-frequency unit 301 is made to return to init state；Pass through the first NAND gate
NAND, first resistor R1 and first capacitor C1 generate the primary sinusoid signal of first frequency, and by the first of first frequency
Sine wave signal is exported to two divided-frequency unit 301, can be with by the resistance value and the capacitance of first capacitor C1 that adjust first resistor R1
Change the frequency of primary sinusoid signal；Two divided-frequency unit 301 carries out frequency dividing operation to the primary sinusoid signal of first frequency,
To generate the second sine wave signal of second frequency, and the second sine wave signal exported first defeated to the first nor gate NOR1
Enter end, by key KEY input by the second input terminal of key control signal to the first nor gate NOR1, so that the first nor gate
NOR1 carries out or logic operation according to the second sine wave signal and by key control signal, to generate switch control signal and export
To the grid of the first field-effect tube Q1；So that the first field-effect tube Q1 is generated according to switch control signal and the second sine wave signal
Driving signal is to drive piezo to work.
When the switch control signal of key KEY output is high level or is hanging, make the drive of the first nor gate NOR1 output
Dynamic signal is low level, then two divided-frequency unit is made to stop the second sine wave signal of output, so that the first field-effect tube Q1 is closed,
And then make that piezo is driven not work.
When the switch control signal of key KEY output is low level, then the first nor gate NOR1 is opened according to low level
It closes control signal and the second sine wave signal carries out logic or operation, to export square wave identical with the second sine wave signal frequency
Driving signal；When square wave driving signal is high level, the first field-effect tube Q1 conducting, the first inductance L1 stores energy, the end BZ
Voltage close to ground terminal voltage；And when square wave driving signal is low level, the first field-effect tube Q1 is closed, the first inductance L1
It releases energy, the voltage at the end BZ is raised；Thus the square-wave waveform for exporting the output waveform at the end BZ and the first nor gate NOR1
Frequency is identical, and the high level current potential at the end BZ is much higher than the high level current potential of the first nor gate NOR1 output, to drive bee
The piece that rings works.
Beneficial effects of the present invention:
(1) primary sinusoid signal of first frequency is generated by RC oscillation module, electrification reset module is raw when powering on
At electrification reset voltage signal so that frequency division module resets, to make frequency division module according to the primary sinusoid signal of first frequency
The second sine wave signal of second frequency is generated, and is opened by switch control signal generation module according to by the generation of key control signal
Control signal is closed, so that drive module be made to generate driving signal according to switch control signal and the second sine wave signal to drive bee
The piece that rings works.
(2) by the way that field-effect tube to be integrated in inside piezo drive integrated circult, in the component for reducing peripheral circuit
While reduce small product size；In addition, improving the processing efficiency of product, production cost is also reduced.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of piezo drive integrated circult, which is characterized in that the piezo drive integrated circult includes:
The RC oscillation module of the primary sinusoid signal of first frequency is generated when for powering on；
It is connect with the RC oscillation module, for generating the of second frequency according to the primary sinusoid signal of the first frequency
The frequency division module of two sine wave signals；
For according to the switch control signal generation module for generating switch control signal by key control signal；
It is connect with the frequency division module, the switch control signal generation module and the piezo, for being opened according to
It closes control signal and second sine wave signal generates driving signal to drive the drive module of the piezo work；And
It being connect with the frequency division module, electrification reset voltage signal is generated when for powering on, so that the frequency division module resetted
Electrification reset module.
2. piezo drive integrated circult as described in claim 1, which is characterized in that the RC oscillation module includes: first
NAND gate, first resistor, first capacitor, the first phase inverter, the second phase inverter, third phase inverter and the 4th phase inverter；
The first input end of first NAND gate accesses power supply signal, the first end of the first resistor and the first capacitor
First end be connected to the second input terminal of first NAND gate, the output end of first NAND gate and first reverse phase altogether
The input terminal of device connects, and the output end of first phase inverter and the first end of the first capacitor are connected to second reverse phase altogether
The input terminal of device, the output end of second phase inverter and the second end of the first resistor are connected to the third phase inverter altogether
Input terminal, the output end of the third phase inverter are connect with the input terminal of the 4th phase inverter, the 4th phase inverter it is defeated
Outlet is the output end of the RC oscillation module.
3. piezo drive integrated circult as described in claim 1, which is characterized in that the electrification reset module includes:
Two field-effect tube, the second capacitor, the first Schmitt trigger, the 5th phase inverter and hex inverter；
The input terminal of second field-effect tube accesses power supply signal, and the control terminal of second field-effect tube connects ground, described
The first end of the output end of second field-effect tube and second capacitor is connected to the input terminal of the first Schmitt trigger altogether,
The second end of second capacitor connects ground, the input of the output end of the first Schmitt trigger and the 5th phase inverter
End connection, the output end of the 5th phase inverter connect with the input terminal of the hex inverter, the hex inverter it is defeated
Outlet is the reset signal output end of the electrification reset module.
4. piezo drive integrated circult as described in claim 1, which is characterized in that the frequency division module includes: two divided-frequency
Unit, the 7th phase inverter, the 8th phase inverter and the 9th phase inverter；
The input terminal of first signal input part of the two divided-frequency unit and the 7th phase inverter connects altogether constitutes the frequency dividing mould
The first input end of block simultaneously accesses second sine wave signal, the output end and the two divided-frequency unit of the 7th phase inverter
Second signal input terminal connection, the RESET input of the two divided-frequency unit and the reset signal of the electrification reset module are defeated
Outlet connection, the first output end of the two divided-frequency unit are connect with the input terminal of the 8th phase inverter, the 8th reverse phase
The output end of device is connect with the input terminal of the 9th phase inverter, and the output end of the 9th phase inverter is the frequency division module
Output end.
5. piezo drive integrated circult as claimed in claim 4, which is characterized in that the two divided-frequency unit includes: multiple
Two-divider, the first signal input part and the first signal output end of each two-divider are sequentially connected respectively, Ge Gesuo
The second signal input terminal and second signal output end for stating two-divider are sequentially connected respectively, the reset of each two-divider
Input terminal connects the RESET input for constituting the two divided-frequency unit altogether.
6. piezo drive integrated circult as described in claim 1, which is characterized in that the switch control signal generation module
It include: third field-effect tube, the tenth phase inverter and the 11st phase inverter；
The input terminal of the third field-effect tube accesses power supply signal, and the control terminal of the third field-effect tube connects ground, described
The input terminal of the output end of third field-effect tube and the tenth phase inverter connects altogether constitutes the switch control signal generation module
Input terminal and access and described press key control signal, the input of the output end and the 11st phase inverter of the tenth phase inverter
End connection, the output end of the 11st phase inverter are the output end of the switch control signal generation module.
7. piezo drive integrated circult as described in claim 1, which is characterized in that the drive module includes: first
Effect pipe, the first nor gate, the 12nd phase inverter and the 13rd phase inverter；
The first input end of first nor gate be the drive module first input end, the second of first nor gate
Input terminal is the second input terminal of the drive module, and the output end of first nor gate is defeated with the 12nd phase inverter
Enter end connection, the output end of the 12nd phase inverter is connect with the input terminal of the 13rd phase inverter, and the described 13rd is anti-
The output end of phase device is the output end of the drive module.
8. a kind of electronic equipment, which is characterized in that including the described in any item piezo drive integrated circults of claim 1 to 7.
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| CN201811532065.5A CN109584853A (en) | 2018-12-14 | 2018-12-14 | A kind of piezo drive integrated circult and electronic equipment |
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| CN201811532065.5A CN109584853A (en) | 2018-12-14 | 2018-12-14 | A kind of piezo drive integrated circult and electronic equipment |
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| CN107017844A (en) * | 2017-06-06 | 2017-08-04 | 居水荣 | A kind of RC oscillators |
| CN108769875A (en) * | 2018-06-26 | 2018-11-06 | 宗仁科技(平潭)有限公司 | Imitate the integrated circuit and warning device of alarm song |
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2018
- 2018-12-14 CN CN201811532065.5A patent/CN109584853A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201845400U (en) * | 2010-09-30 | 2011-05-25 | 长安大学 | Home defending and alarming device |
| CN102045041A (en) * | 2011-01-17 | 2011-05-04 | 上海宏力半导体制造有限公司 | Resistance-capacitance (RC) oscillator and realization method thereof |
| CN103220854A (en) * | 2013-04-02 | 2013-07-24 | 深圳市明微电子股份有限公司 | LED (Light-emitting Diode) stroboscopic control circuit and LED stroboscope lamp |
| CN106847141A (en) * | 2016-12-29 | 2017-06-13 | 深圳市宇顺电子股份有限公司 | A kind of display screen test circuit |
| CN107017844A (en) * | 2017-06-06 | 2017-08-04 | 居水荣 | A kind of RC oscillators |
| CN108769875A (en) * | 2018-06-26 | 2018-11-06 | 宗仁科技(平潭)有限公司 | Imitate the integrated circuit and warning device of alarm song |
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