CN109495811A - Speaker - Google Patents
Speaker Download PDFInfo
- Publication number
- CN109495811A CN109495811A CN201811487906.5A CN201811487906A CN109495811A CN 109495811 A CN109495811 A CN 109495811A CN 201811487906 A CN201811487906 A CN 201811487906A CN 109495811 A CN109495811 A CN 109495811A
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- Prior art keywords
- triode
- resistance
- capacitor
- potentiometer
- diode
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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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/03—Connection circuits to selectively connect loudspeakers or headphones to amplifiers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a kind of speakers, the main circuit board is equipped with voltage input end, first potentiometer, second resistance, first triode, 3rd resistor, first capacitor, second diode, 4th potentiometer, 7th resistance, first diode, 5th potentiometer, second triode, 6th resistance, 8th resistance, third transistor, 4th triode, second capacitor, buzzer and voltage output end, the voltage input end is connect with a fixing end of first potentiometer, another fixing end of first potentiometer is grounded, the sliding end of first potentiometer is connect with the base stage of one end of the second resistance and the first triode respectively, the other end of the second resistance anode with second diode respectively, one end of 7th resistance is connected with one end of the 8th resistance.Implement speaker of the invention, have the advantages that circuit structure is relatively simple, cost is relatively low, maintain easily, the safety and reliability of circuit it is higher.
Description
Technical field
The present invention relates to field of electronic device, in particular to a kind of speaker.
Background technique
Speaker refers to a kind of equipment that audio signal can be transformed to sound.It is popular say just refer to speaker host cabinet or
Power amplifier is carried in subwoofer cabinet, audio signal is amplified, sound is played back out by speaker itself after handling, make it
Sound becomes larger.Speaker is the terminal of entire sound system, and effect is audio electric energy to be converted into corresponding sound energy, and its spoke
Space is mapped to go.It is the extremely important component part of sound system, is responsible for the ear that electric signal is transformed into acoustical signal for people
Piece directly listening to for task.There is circuit board inside speaker, the component that the circuit board of traditional speaker uses is more, circuit structure
Complexity, hardware cost are higher, it has not been convenient to safeguard.In addition, since the circuit board of traditional speaker lacks corresponding circuit protection function,
Such as: current-limiting protection function causes the safety and reliability of circuit poor.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, provide a kind of circuit structure compared with
For simple, cost is relatively low, maintains easily, the higher speaker of the safety and reliability of circuit.
The technical solution adopted by the present invention to solve the technical problems is: a kind of speaker, including main circuit board are constructed, it is described
Main circuit board is equipped with voltage input end, the first potentiometer, second resistance, the first triode, 3rd resistor, first capacitor, the
Two diodes, the 4th potentiometer, the 7th resistance, first diode, the 5th potentiometer, the second triode, the 6th resistance, the 8th electricity
Resistance, third transistor, the 4th triode, the second capacitor, buzzer and voltage output end, the voltage input end and described first
One fixing end of potentiometer connects, another fixing end ground connection of first potentiometer, the sliding of first potentiometer
End connect respectively with the base stage of one end of the second resistance and the first triode, the other end of the second resistance respectively with institute
One end of the anode, the 7th resistance of stating the second diode is connected with one end of the 8th resistance, the cathode point of second diode
Not with a fixing end of the 4th potentiometer, sliding end, the emitter of third transistor, the 4th triode emitter and
One end of second capacitor connects, and the collector of first triode is connect with one end of the first capacitor, first electricity
The other end of appearance is connect with the base stage of another fixing end of the 4th potentiometer and the second triode respectively, and the described 1st
The emitter of pole pipe is connect with one end of one end of the 3rd resistor, the other end of the second capacitor and buzzer respectively, described
The other end of 3rd resistor is grounded, the other end of the 7th resistance respectively with the anode of the first diode and the three or three pole
The base stage of pipe connects, and the cathode of the first diode is connect with a fixing end of the 5th potentiometer, the 5th electricity
Another fixing end of position device connects with the base stage of its sliding end, the collector of second triode and the 4th triode respectively
Connect, the emitter of second triode by the 6th resistance eutral grounding, the other end of the 8th resistance respectively with it is described
The collector of third transistor is connected with one end of voltage output end, the collector of the 4th triode, buzzer it is another
The other end of end and voltage output end is grounded, the model S-452T of second diode.
In speaker of the present invention, third capacitor, one end of the third capacitor are additionally provided on the main circuit board
It being connect with the collector of second triode, the other end of the third capacitor is connect with the base stage of the 4th triode,
The capacitance of the third capacitor is 370pF.
In speaker of the present invention, the 4th capacitor, one end of the 4th capacitor are additionally provided on the main circuit board
It is connect with the emitter of the third transistor, the other end of the 4th capacitor emitter with the 4th triode respectively
It is connected with one end of the second capacitor, the capacitance of the 4th capacitor is 450pF.
In speaker of the present invention, the 9th resistance, one end of the 9th resistance are additionally provided on the main circuit board
It is connect with the collector of the 4th triode, the other end ground connection of the 9th resistance, the resistance value of the 9th resistance is 36k
Ω。
In speaker of the present invention, third diode is additionally provided on the main circuit board, the third diode
Anode is connect with one end of the emitter of first triode and 3rd resistor respectively, the cathode difference of the third diode
It is connect with one end of the other end of second capacitor and buzzer, the model S-183T of the third diode.
In speaker of the present invention, first triode is NPN type triode.
In speaker of the present invention, second triode is NPN type triode.
In speaker of the present invention, the third transistor is NPN type triode.
In speaker of the present invention, the 4th triode is PNP type triode.
Implement speaker of the invention, has the advantages that since main circuit board is equipped with voltage input end, the first electricity
Position device, second resistance, the first triode, 3rd resistor, first capacitor, the second diode, the 4th potentiometer, the 7th resistance, the
One diode, the 5th potentiometer, the second triode, the 6th resistance, the 8th resistance, third transistor, the 4th triode, the second electricity
Appearance, buzzer and voltage output end, for the main circuit board compared with the circuit board of traditional speaker, the component used is less, by
In saving some components, hardware cost can be reduced in this way, in addition, the second diode is used to carry out current-limiting protection, therefore
Circuit structure is relatively simple, cost is relatively low, maintain easily, the safety and reliability of circuit is higher.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the electrical block diagram of main circuit board in speaker one embodiment of the present invention.
Specific embodiment
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 description, it is clear that 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, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In speaker embodiment of the present invention, which includes main circuit board, the electrical block diagram of the circuit board such as Fig. 1
It is shown.In Fig. 1, which is equipped with voltage input end Vin, the first potentiometer RP1, second resistance R2, the first triode
Q1,3rd resistor R3, first capacitor C1, the second diode D2, the 4th potentiometer RP4, the 7th resistance R7, first diode D1,
5th potentiometer RP5, the second triode Q2, the 6th resistance R6, the 8th resistance R8, third transistor Q3, the 4th triode Q4,
Two capacitor C2, buzzer B and voltage output end Vo, wherein a fixing end of voltage input end Vin and the first potentiometer RP1
Connection, another fixing end ground connection of the first potentiometer RP1, the sliding end of the first potentiometer RP1 is respectively with second resistance R2's
One end is connected with the base stage of the first triode Q1, the other end of second resistance R2 respectively with the anode of the second diode D2, the 7th
One end of resistance R7 is connected with one end of the 8th resistance R8, the cathode of the second diode D2 respectively with the 4th potentiometer RP4 one
One end company of a fixing end, sliding end, the emitter of third transistor Q3, the emitter of the 4th triode Q4 and the second capacitor C2
It connects, the collector of the first triode Q1 is connect with one end of first capacitor C1, and the other end of first capacitor C1 is electric with the 4th respectively
Another fixing end of position device RP4 is connected with the base stage of the second triode Q2, the emitter of the first triode Q1 respectively with third
One end of resistance R3, the second capacitor C2 the other end connected with one end of buzzer B, the other end of 3rd resistor R3 ground connection, the
The other end of seven resistance R7 is connect with the base stage of the anode of first diode D1 and third transistor Q3 respectively, first diode D1
Cathode connect with a fixing end of the 5th potentiometer RP5, another fixing end of the 5th potentiometer RP5 is slided with it respectively
The base stage connection at end, the collector of the second triode Q2 and the 4th triode Q4, the emitter of the second triode Q2 pass through the 6th
Resistance R6 ground connection, the other end of the 8th resistance R8 connect with one end of the collector of third transistor Q3 and voltage output end Vo respectively
It connects, the other end of the collector of the 4th triode Q4, the other end of buzzer B and voltage output end Vo is grounded.
The main circuit board is compared with the circuit board of traditional speaker, and the component used is less, and circuit structure is relatively simple,
It maintains easily, due to saving some components, hardware cost can be reduced in this way.In addition, the second diode D2 is current limliting two
Pole pipe, for carrying out current-limiting protection, therefore the safety and reliability of circuit is higher.It is noted that in the present embodiment, the
The model S-452T of two diode D2, certainly, in practical applications, the second diode D2 can also be had using other models
The diode of similar functions.
In the present embodiment, the first potentiometer RP1 is volume potentiometer, and the first triode Q1 is preposition amplifier tube, before composition
Amplifying stage is set, the first triode Q1 uses NPN type silicon triode, and the temperature stability of silicone tube is preferable, can be used by second resistance
The simple bias circuit that R2 (biasing resistor) is constituted guarantees the first triode Q1 work in Class A magnifying state, 3rd resistor R3
Resistance value very little mainly plays a part of to exchange negative-feedback.Certainly, in practical applications, the first triode Q1 can also use positive-negative-positive
Triode, but at this moment the structure of circuit also will accordingly change.
In the present embodiment, the second triode Q2 be excitation amplifier tube, composition push grade, it to power amplification output stage with
Enough driving signals.
5th potentiometer RP5 provides bias voltage for the second triode Q2, guarantees that the second triode Q2 also works in Class A
Collector current a part of magnifying state, the second triode Q2 flows through the 7th resistance R7, the 4th potentiometer RP4 and the one or two pole
Pipe D1 provides bias to third transistor Q3 and the 4th triode Q4.So the 7th resistance R7, the 4th potentiometer RP4 and first
Diode D1 is both the collector load of the second triode Q2 and the base bias of third transistor Q3 and the 4th triode Q4
Circuit.Third transistor Q3, the 4th triode Q4 are mutual symmetry push-pull power amplifier pipes, be the symmetrical NPN of a pair of of parameter and
Positive-negative-positive transistor organizes the output stage of power amplifier, since each pipe is connected into emitter-follower form, because
This has many advantages, such as that output resistance is low, and load capacity is strong, is suitable for rate of doing work output stage, is on the one hand capable of the quiet of stabilizing amplifier
State operating point, while also improving non-linear distortion.
Certainly, in practical applications, third transistor Q3 may be PNP type triode, and the 4th triode Q4 can also be with
For NPN type triode, but at this moment the structure of circuit also will accordingly change.
In the present embodiment, the second capacitor C2 is output coupling capacitor, and general capacity is larger, can be used for improving output voltage
The amplitude of positive half cycle, can be improved power gain, to obtain big dynamic range, reduce distortion.
It when voltage input end Vin inputs sinusoidal ac signal, is divided through the first potentiometer RP1, the first triode Q1 is put
After big, using the base stage for acting on third transistor Q3 and the 4th triode Q4 after the second triode Q2 amplification paraphase simultaneously.
Third transistor Q3 is connected in the positive half cycle of sinusoidal ac signal, and the 4th triode Q4 cut-off has electric current by buzzer B, together
When to the second capacitor C2 charge；In the negative half period of sinusoidal ac signal, the 4th triode Q4 conducting, third transistor Q3 ends,
The the second capacitor C2 then to have substituted the bad for the good plays a part of power supply, is discharged by buzzer B, just obtains on buzzer B so complete
Sine wave.
It is noted that the second triode Q2 is NPN type triode in the present embodiment.Certainly, in practical applications,
Second triode Q2 may be PNP type triode, but at this moment the structure of circuit also will accordingly change.
In the present embodiment, third capacitor C3, one end of third capacitor C3 and the second triode are additionally provided on the main circuit board
The collector of Q2 connects, and the other end of third capacitor C3 is connect with the base stage of the 4th triode Q4.Third capacitor C3 is coupling electricity
Hold, for preventing the interference between the second triode Q2 and the 4th triode Q4, with further enhance circuit safety and can
By property.It is noted that the capacitance of third capacitor C3 is 370pF in the present embodiment, certainly, in practical applications, third
The capacitance of capacitor C3 can adjust accordingly as the case may be, that is, the capacitance of third capacitor C3 can be according to tool
Body situation is increased accordingly or is reduced.
In the present embodiment, the 4th capacitor C4, one end of the 4th capacitor C4 and third transistor are additionally provided on the main circuit board
The emitter of Q3 connects, the other end of the 4th capacitor C4 one end with the emitter of the 4th triode Q4 and the second capacitor C2 respectively
Connection.4th capacitor C4 be coupled capacitor, for preventing the interference between third transistor Q3 and the 4th triode Q4, with more into
The safety and reliability of one step enhancing circuit.It is noted that in the present embodiment, the capacitance of the 4th capacitor C4 is
450pF, certainly, in practical applications, the capacitance of the 4th capacitor C4 can adjust accordingly as the case may be, that is,
The capacitance of 4th capacitor C4 is increased accordingly or is reduced as the case may be.
In the present embodiment, the 9th resistance R9, one end of the 9th resistance R9 and the 4th triode are additionally provided on the main circuit board
The collector of Q4 connects, the other end ground connection of the 9th resistance R9.9th resistance R9 is current-limiting resistance, for the 4th triode Q4
Emitter current carry out current-limiting protection, to further enhance current limitation effect.It is noted that in the present embodiment, the 9th electricity
The resistance value for hindering R9 is 36k Ω, and certainly, in practical applications, the resistance value of the 9th resistance R9 can carry out accordingly as the case may be
Adjustment, that is, the resistance value of the 9th resistance R9 can be increased accordingly or be reduced as the case may be.
In the present embodiment, it is additionally provided with third diode D3 on the main circuit board, the anode of third diode D3 is respectively with
The emitter of one triode Q1 is connected with one end of 3rd resistor R3, and the cathode of third diode D3 is respectively with the second capacitor C2's
The other end is connected with one end of buzzer B.Third diode D3, which is limited, flows Current Limiting Diodes, for carrying out current-limiting protection, with more
Further enhance current limitation effect.It is noted that in the present embodiment, the model S-183T of third diode D3, certainly,
In practical application, third diode D3 can also have the diode of similar functions using other models.
In short, for the main circuit board compared with the circuit board of traditional speaker, the component used is less in the present embodiment,
Circuit structure is relatively simple, maintains easily, and due to saving some components, can reduce hardware cost in this way.In addition, the master
Current Limiting Diodes are equipped in circuit board, therefore the safety and reliability of circuit is higher.
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
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of speaker, which is characterized in that including main circuit board, the main circuit board is equipped with voltage input end, the first current potential
Device, second resistance, the first triode, 3rd resistor, first capacitor, the second diode, the 4th potentiometer, the 7th resistance, first
Diode, the 5th potentiometer, the second triode, the 6th resistance, the 8th resistance, third transistor, the 4th triode, the second electricity
Appearance, buzzer and voltage output end, the voltage input end are connect with a fixing end of first potentiometer, and described first
Another fixing end of potentiometer is grounded, the sliding end of first potentiometer respectively with one end of the second resistance and first
The base stage of triode connects, the other end of the second resistance respectively with the anode of second diode, the 7th resistance one
End connected with one end of the 8th resistance, the cathode of second diode respectively with a fixing end of the 4th potentiometer,
One end connection of sliding end, the emitter of third transistor, the emitter of the 4th triode and the second capacitor, the one or three pole
The collector of pipe is connect with one end of the first capacitor, the other end of the first capacitor respectively with the 4th potentiometer
Another fixing end is connected with the base stage of the second triode, the emitter of first triode respectively with the 3rd resistor
One end, the other end of the second capacitor are connected with one end of buzzer, the other end ground connection of the 3rd resistor, the 7th resistance
The other end connect respectively with the base stage of the anode of the first diode and third transistor, the cathode of the first diode
Connect with a fixing end of the 5th potentiometer, another fixing end of the 5th potentiometer respectively with its sliding end,
The connection of the base stage of the collector of second triode and the 4th triode, the emitter of second triode pass through described the
Six resistance eutral groundings, the other end of the 8th resistance one end with the collector of the third transistor and voltage output end respectively
Connection, collector, the other end of buzzer and the other end of voltage output end of the 4th triode are grounded, and described second
The model S-452T of diode.
2. speaker according to claim 1, which is characterized in that it is additionally provided with third capacitor on the main circuit board, described
One end of three capacitors is connect with the collector of second triode, the other end of the third capacitor and the 4th triode
Base stage connection, the capacitance of the third capacitor is 370pF.
3. speaker according to claim 2, which is characterized in that it is additionally provided with the 4th capacitor on the main circuit board, described
One end of four capacitors is connect with the emitter of the third transistor, and the other end of the 4th capacitor is respectively with the described 4th 3
The connection of one end of the emitter of pole pipe and the second capacitor, the capacitance of the 4th capacitor are 450pF.
4. speaker according to claim 3, which is characterized in that it is additionally provided with the 9th resistance on the main circuit board, described
One end of nine resistance is connect with the collector of the 4th triode, the other end ground connection of the 9th resistance, the 9th electricity
The resistance value of resistance is 36k Ω.
5. speaker according to any one of claims 1 to 4, which is characterized in that be additionally provided with third on the main circuit board
Diode, the anode of the third diode are connect with one end of the emitter of first triode and 3rd resistor respectively,
The cathode of the third diode is connect with one end of the other end of second capacitor and buzzer respectively, the three or two pole
The model S-183T of pipe.
6. speaker according to claim 5, which is characterized in that first triode is NPN type triode.
7. speaker according to claim 5, which is characterized in that second triode is NPN type triode.
8. speaker according to claim 5, which is characterized in that the third transistor is NPN type triode.
9. speaker according to claim 5, which is characterized in that the 4th triode is PNP type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487906.5A CN109495811A (en) | 2018-12-06 | 2018-12-06 | Speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487906.5A CN109495811A (en) | 2018-12-06 | 2018-12-06 | Speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109495811A true CN109495811A (en) | 2019-03-19 |
Family
ID=65699326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811487906.5A Pending CN109495811A (en) | 2018-12-06 | 2018-12-06 | Speaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109495811A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110087048A (en) * | 2019-05-24 | 2019-08-02 | 广州触派电子科技有限公司 | Projector system |
| CN110728837A (en) * | 2019-11-07 | 2020-01-24 | 广州市赛狄王体育用品有限公司 | Basketball formula intelligence audio amplifier control system based on wireless mode |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2046550C1 (en) * | 1992-01-09 | 1995-10-20 | Кубанский государственный аграрный университет | Pulse ultrasound oscillator |
| US20030184233A1 (en) * | 2002-03-28 | 2003-10-02 | Gourdine Roger K. | Secondary vehicle headlight system |
| CN204482025U (en) * | 2015-04-14 | 2015-07-15 | 罗开南 | A kind of audio amplifier circuit |
| CN105375884A (en) * | 2015-11-24 | 2016-03-02 | 宁波柏人艾电子有限公司 | Loudspeaker box power amplification circuit |
| CN207354224U (en) * | 2017-10-20 | 2018-05-11 | 贵州裕华隆电子科技有限公司 | Power amplification circuit for speaker of voice box |
-
2018
- 2018-12-06 CN CN201811487906.5A patent/CN109495811A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2046550C1 (en) * | 1992-01-09 | 1995-10-20 | Кубанский государственный аграрный университет | Pulse ultrasound oscillator |
| US20030184233A1 (en) * | 2002-03-28 | 2003-10-02 | Gourdine Roger K. | Secondary vehicle headlight system |
| CN204482025U (en) * | 2015-04-14 | 2015-07-15 | 罗开南 | A kind of audio amplifier circuit |
| CN105375884A (en) * | 2015-11-24 | 2016-03-02 | 宁波柏人艾电子有限公司 | Loudspeaker box power amplification circuit |
| CN207354224U (en) * | 2017-10-20 | 2018-05-11 | 贵州裕华隆电子科技有限公司 | Power amplification circuit for speaker of voice box |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110087048A (en) * | 2019-05-24 | 2019-08-02 | 广州触派电子科技有限公司 | Projector system |
| CN110728837A (en) * | 2019-11-07 | 2020-01-24 | 广州市赛狄王体育用品有限公司 | Basketball formula intelligence audio amplifier control system based on wireless mode |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20190319 |