CN108600905A - A kind of dynamic loudspeaker driving circuit - Google Patents
A kind of dynamic loudspeaker driving circuit Download PDFInfo
- Publication number
- CN108600905A CN108600905A CN201810264995.0A CN201810264995A CN108600905A CN 108600905 A CN108600905 A CN 108600905A CN 201810264995 A CN201810264995 A CN 201810264995A CN 108600905 A CN108600905 A CN 108600905A
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- poles
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- channel mos
- mos pipe
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- 239000004065 semiconductor Substances 0.000 claims abstract description 48
- 238000005070 sampling Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 6
- 238000001914 filtration Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
Abstract
The present invention relates to loudspeaker driving circuit technical field more particularly to a kind of inexpensive dynamic loudspeaker driving circuits, including SOC chip, dynamic loudspeaker and the H bridges amplification resistance being made of four metal-oxide-semiconductors, two pull-up resistors and two pull down resistors.The goal of the invention of the present invention is to provide a kind of dynamic loudspeaker driving circuit solve the technical problem that existing dynamic loudspeaker uses DAC+CLASS D schemes to cause product design costs high using technical solution provided by the invention.
Description
Technical field
The present invention relates to loudspeaker driving circuit technical field more particularly to a kind of inexpensive dynamic loudspeaker driving electricity
Road.
Background technology
Currently, using buzzer output single-frequency alarm sound, it is impossible to meet markets to need on automobile electronics
It asks, trend is had become to carry out alarm using polyphonic ring tone or voice, with trend, vehicle factor will also require automotive electronics to supply
Quotient substitutes buzzer scheme using dynamic loudspeaker (dynamic loudspeaker).Currently, dynamic loudspeaker driving generally uses DAC+
CLASS D schemes, there are the higher disadvantages of cost for the program.
Invention content
The goal of the invention of the present invention is to provide a kind of dynamic loudspeaker driving circuit, using technical side provided by the invention
Case solves the technical problem that existing dynamic loudspeaker uses DAC+CLASS D schemes to cause product design costs high.
In order to solve the above technical problem, the present invention provides a kind of dynamic loudspeaker driving circuits, including SOC chip, two
A P-channel metal-oxide-semiconductor, two pull-up resistors, two N-channel MOS pipes, two pull down resistors and dynamic loudspeaker；
SOC chip is fixed frequency sampling for the PCM signal to input and obtains pwm signal, the pwm signal point
Not in the P mouths of the SOC chip and N mouthfuls of outputs；
Power supply is accessed in the poles S of first P-channel metal-oxide-semiconductor, and the first pull-up resistor is accessed between the poles G；First P-channel MOS
The poles D of the first N-channel MOS pipe are accessed in the poles D of pipe；The poles S of first N-channel MOS pipe are grounded, and between the poles G under access first
Pull-up resistor；
Power supply is accessed in the poles S of second P-channel metal-oxide-semiconductor, and the second pull-up resistor is accessed between the poles G；Second P-channel MOS
The poles D of the second N-channel MOS pipe are accessed in the poles D of pipe；The poles S of second N-channel MOS pipe are grounded, and between the poles G under access second
Pull-up resistor；
Between the P mouths of SOC chip and the N mouthfuls of poles G for being respectively connected to the first P-channel metal-oxide-semiconductor and the poles G of the first N-channel MOS pipe
And second P-channel metal-oxide-semiconductor the poles G and the poles G of the second N-channel MOS pipe between；
The two poles of the earth of dynamic loudspeaker are respectively connected between the poles D of the first P-channel metal-oxide-semiconductor and the poles D of the first N-channel MOS pipe
And second P-channel metal-oxide-semiconductor the poles D and the poles D of the second N-channel MOS pipe between.
Preferably, the SOC chip obtains pwm signal for frequency sampling to be fixed to the PCM signal of input；It is described
Fixed frequency is greater than or equal to 44KHz.
Preferably, it is low level or high level when the P mouths of the SOC chip are different with N mouthfuls.
Preferably, further include that there are two the low-frequency filter circuits that inductance and two capacitances form；The dynamic loudspeaker
The poles D and the first N-channel of the first P-channel metal-oxide-semiconductor are accessed in the two poles of the earth by two inductance respectively respectively by two capacity earths
Between the poles D of metal-oxide-semiconductor and between the poles D of the second P-channel metal-oxide-semiconductor and the poles D of the second N-channel MOS pipe.
Technical solution provided by the invention by the way that the conversion of various alarm sound materials is exported PWM inside SOC, then by by
The H bridge amplifying circuits of four metal-oxide-semiconductors composition are exported to dynamic loudspeaker, and various alternative sounds materials are sent out by dynamic loudspeaker
Alarm sound, dynamic loudspeaker driving design cost is greatly lowered, reliability is high, is suitable for high-volume and promotes and applies.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, the present invention will be implemented below
Attached drawing is briefly described needed in the description of example or the prior art.It should be evident that the accompanying drawings in the following description
Only a part of the embodiment of the invention, for those of ordinary skill in the art, in not making the creative labor property
Under the premise of, other drawings may also be obtained based on these drawings.
Fig. 1 is circuit connection diagram of the embodiment of the present invention；
Fig. 2 is P mouthfuls of SOC chip of the embodiment of the present invention and N mouthfuls of signal output waveform figures.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Currently, dynamic loudspeaker driving generally uses DAC+CLASS D schemes, there are the higher disadvantages of cost for the program.
Fig. 1 is referred to, in order to solve the above-mentioned technical problem, the present embodiment provides a kind of dynamic loudspeaker driving circuit, packets
SOC chip, two P-channel metal-oxide-semiconductors, two pull-up resistors, two N-channel MOS pipes, two pull down resistors and dynamic is included to raise one's voice
Device.Two of which P-channel metal-oxide-semiconductor is respectively the first P-channel metal-oxide-semiconductor Q1 and the second P-channel metal-oxide-semiconductor Q2, two pull-up resistors point
Not Wei the first pull-up resistor R1 and the second pull-up resistor R2, two N-channel MOS pipes be respectively the first N-channel MOS pipe Q3 and second
N-channel MOS pipe Q4, two pull down resistors are respectively the first pull down resistor R3 and the second pull down resistor R4.
Wherein, SOC chip is fixed frequency sampling for the PCM signal to input and obtains pwm signal, pwm signal point
Not in the P of SOC chip mouths and N mouthfuls of outputs, PCM signal is various alarm sound materials.
Specifically, 5V power supplys are accessed in the poles S of the first P-channel metal-oxide-semiconductor Q1, and the first pull-up resistor R1 is accessed between the poles G；
The poles D of the first N-channel MOS pipe Q3 are accessed in the poles D of first P-channel metal-oxide-semiconductor Q1；The poles S of first N-channel MOS pipe Q3 are grounded, and with
The first pull down resistor R3 is accessed between the poles G.
5V power supplys are accessed in the poles S of second P-channel metal-oxide-semiconductor Q2, and the second pull-up resistor R2 is accessed between the poles G；2nd P ditches
The poles D of the second N-channel MOS pipe Q4 are accessed in the poles D of road metal-oxide-semiconductor Q2；The poles S of second N-channel MOS pipe Q4 are grounded, and between the poles G
Access the second pull down resistor R4.
In said structure, two pull-up resistors are respectively the pull-up resistor of two P-channel metal-oxide-semiconductors, ensure the first P-channel
Metal-oxide-semiconductor Q1 and the second P-channel metal-oxide-semiconductor Q2 is cut-off state in no input signal；Two pull down resistors are respectively two N-channels
The pull down resistor of metal-oxide-semiconductor, it is cut-off shape to ensure the first N-channel MOS pipe Q3 and the second N-channel MOS pipe Q4 in no input signal
State.
The poles G of the P mouths of SOC chip and N mouthfuls of poles G for being respectively connected to the first P-channel metal-oxide-semiconductor Q1 and the first N-channel MOS pipe Q3
Between and the poles G and the poles G of the second N-channel MOS pipe Q4 of the second P-channel metal-oxide-semiconductor Q2 between.Wherein, the P mouths and N of SOC chip
It is low level or high level when mouth is different.
The two poles of the earth of dynamic loudspeaker are respectively connected to the poles D of the poles D and the first N-channel MOS pipe Q3 of the first P-channel metal-oxide-semiconductor Q1
Between and the poles D and the poles D of the second N-channel MOS pipe Q4 of the second P-channel metal-oxide-semiconductor Q2 between.
Driving circuit provided in this embodiment, P mouthfuls and N mouthfuls are respectively that PCM Sample are fixed inside SOC chip
The output signal that frequency sampling (44KHz or higher frequency) is converted to PWM Sample, refers to Fig. 2, is for P mouthfuls when input signal
When low level, N mouthfuls of input signal is high level simultaneously, i.e. the first P-channel metal-oxide-semiconductor Q1 and the second N-channel MOS pipe Q4 are connected, the
Two P-channel metal-oxide-semiconductor Q2 and the first N-channel MOS pipe Q3 cut-offs, Speaker+ outputs are high level, and Speaker- outputs are low electricity
It is flat；If P mouthfuls of input signal is high level, N mouthfuls of input signal is low level, i.e. the first P-channel metal-oxide-semiconductor Q1 and the 2nd N simultaneously
Channel MOS tube Q4 cut-offs, the second P-channel metal-oxide-semiconductor Q2 and the first N-channel MOS pipe Q3 conductings, Speaker+ outputs are low level,
Speaker- outputs are high level.Drive amplification is realized to pwm signal by the H bridges amplifying circuit that four metal-oxide-semiconductors form.
The present embodiment further includes there are two the low-frequency filter circuit that inductance and two capacitances form, and two inductance are respectively the
One inductance L1 and the second inductance L2, two capacitances are respectively the first capacitance C1 and the second capacitance C2.The two poles of the earth of dynamic loudspeaker point
Not by the first capacitance C1 and the second capacitance C2 ground connection, and the first P ditches are accessed by the first inductance L1 and the second inductance L2 respectively
Between the poles D of road metal-oxide-semiconductor Q1 and the poles D of the first N-channel MOS pipe Q3 and poles D of the second P-channel metal-oxide-semiconductor Q2 and the second N-channel
Between the poles D of metal-oxide-semiconductor Q4.
Pwm signal after drive amplification drives after the low-pass filter circuit filtering of two inductance and two capacitance compositions
Dynamic dynamic loudspeaker sends out the alarm sound of various sound materials.
Technical solution provided in this embodiment exports PWM by the way that various alarm sound materials are converted inside SOC, then passes through
The H bridge amplifying circuits being made of four metal-oxide-semiconductors are exported to dynamic loudspeaker, are exported to dynamic loudspeaker using low-pass filtering,
The alarm sound that various alternative sounds materials are sent out by dynamic loudspeaker is greatly lowered dynamic loudspeaker driving and is designed to
This, reliability is high, is suitable for high-volume and promotes and applies.
Embodiments described above does not constitute the restriction to the technical solution protection domain.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution made by within the spirit and principle of mode
Within enclosing.
Claims (4)
1. a kind of dynamic loudspeaker driving circuit, it is characterised in that：Including SOC chip, two P-channel metal-oxide-semiconductors, two pull-up electricity
Resistance, two N-channel MOS pipes, two pull down resistors and dynamic loudspeaker；
SOC chip is fixed frequency sampling for the PCM signal to input and obtains pwm signal, the pwm signal respectively at
The P mouths of the SOC chip and N mouthfuls of outputs；
Power supply is accessed in the poles S of first P-channel metal-oxide-semiconductor, and the first pull-up resistor is accessed between the poles G；The D of first P-channel metal-oxide-semiconductor
The poles D of the first N-channel MOS pipe are accessed in pole；The poles S of first N-channel MOS pipe are grounded, and the first drop-down of access electricity between the poles G
Resistance；
Power supply is accessed in the poles S of second P-channel metal-oxide-semiconductor, and the second pull-up resistor is accessed between the poles G；The D of second P-channel metal-oxide-semiconductor
The poles D of the second N-channel MOS pipe are accessed in pole；The poles S of second N-channel MOS pipe are grounded, and the second drop-down of access electricity between the poles G
Resistance；
Between the P mouths of SOC chip and the N mouthfuls of poles G for being respectively connected to the first P-channel metal-oxide-semiconductor and the poles G of the first N-channel MOS pipe and
Between the poles G of second P-channel metal-oxide-semiconductor and the poles G of the second N-channel MOS pipe；
The two poles of the earth of dynamic loudspeaker be respectively connected between the poles D of the first P-channel metal-oxide-semiconductor and the poles D of the first N-channel MOS pipe and
Between the poles D of second P-channel metal-oxide-semiconductor and the poles D of the second N-channel MOS pipe.
2. dynamic loudspeaker driving circuit according to claim 1, it is characterised in that：The SOC chip is used for input
PCM signal frequency sampling be fixed obtain pwm signal；The fixed frequency is greater than or equal to 44KHz.
3. dynamic loudspeaker driving circuit according to claim 2, it is characterised in that：The P mouths of the SOC chip and N mouthfuls
It is asynchronously low level or high level.
4. dynamic loudspeaker driving circuit according to claim 3, it is characterised in that：Further include that there are two inductance and two
The low-frequency filter circuit of capacitance composition；The two poles of the earth of the dynamic loudspeaker pass through two respectively respectively by two capacity earths
Between the poles D and the poles D of the first N-channel MOS pipe of the first P-channel metal-oxide-semiconductor of a inductance access and poles D of the second P-channel metal-oxide-semiconductor
Between the poles D of the second N-channel MOS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810264995.0A CN108600905A (en) | 2018-03-28 | 2018-03-28 | A kind of dynamic loudspeaker driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810264995.0A CN108600905A (en) | 2018-03-28 | 2018-03-28 | A kind of dynamic loudspeaker driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108600905A true CN108600905A (en) | 2018-09-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810264995.0A Pending CN108600905A (en) | 2018-03-28 | 2018-03-28 | A kind of dynamic loudspeaker driving circuit |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267188A (en) * | 2007-03-16 | 2008-09-17 | 雅马哈株式会社 | Digital input class-D amplifier |
| CN101875377A (en) * | 2009-11-05 | 2010-11-03 | 无锡职业技术学院 | Anti-theft electric motor car driver |
| US20110012677A1 (en) * | 2009-07-15 | 2011-01-20 | Nxp B.V. | Current sensing |
| CN201788697U (en) * | 2010-05-18 | 2011-04-06 | 东莞市步步高家用电器有限公司 | Voice broadcasting circuit |
| CN104412321A (en) * | 2012-06-25 | 2015-03-11 | 松下知识产权经营株式会社 | Alarm drive circuit |
| CN105355003A (en) * | 2015-12-02 | 2016-02-24 | 国网宁夏电力公司银川供电公司 | Voice prompting device for construction safety operation |
| CN105450186A (en) * | 2014-08-29 | 2016-03-30 | 意法半导体研发(深圳)有限公司 | Advanced current limiting function for audio amplifier |
-
2018
- 2018-03-28 CN CN201810264995.0A patent/CN108600905A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267188A (en) * | 2007-03-16 | 2008-09-17 | 雅马哈株式会社 | Digital input class-D amplifier |
| US20110012677A1 (en) * | 2009-07-15 | 2011-01-20 | Nxp B.V. | Current sensing |
| CN101875377A (en) * | 2009-11-05 | 2010-11-03 | 无锡职业技术学院 | Anti-theft electric motor car driver |
| CN201788697U (en) * | 2010-05-18 | 2011-04-06 | 东莞市步步高家用电器有限公司 | Voice broadcasting circuit |
| CN104412321A (en) * | 2012-06-25 | 2015-03-11 | 松下知识产权经营株式会社 | Alarm drive circuit |
| CN105450186A (en) * | 2014-08-29 | 2016-03-30 | 意法半导体研发(深圳)有限公司 | Advanced current limiting function for audio amplifier |
| CN105355003A (en) * | 2015-12-02 | 2016-02-24 | 国网宁夏电力公司银川供电公司 | Voice prompting device for construction safety operation |
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Application publication date: 20180928 |
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| RJ01 | Rejection of invention patent application after publication |