CN101783988B - Vehicle external amplifier for generating high power - Google Patents
Vehicle external amplifier for generating high power Download PDFInfo
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- CN101783988B CN101783988B CN 200910000182 CN200910000182A CN101783988B CN 101783988 B CN101783988 B CN 101783988B CN 200910000182 CN200910000182 CN 200910000182 CN 200910000182 A CN200910000182 A CN 200910000182A CN 101783988 B CN101783988 B CN 101783988B
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Abstract
The invention discloses a vehicle external amplifier for generating high power, which comprises an audio amplification module, a pulse width modulation module, a drive amplification module, a switch control and silence module and a filtering power supply module, wherein the pulse width modulation module is electrically connected with the audio amplification module, pulse-width modulation (PWM) signals are generated by comparing received signals transferred by a paraphase unit and an audio amplification unit of the audio amplification module with signals in the pulse width modulation module, the drive amplification module is in coupled with the pulse width modulation module, the operation of the drive amplification module is controlled according to the PWM signals to generate high current audio signals, the switch control and silence module receives control signals for controlling the drive amplification module, and the filtering power supply module is respectively and electrically connected with the audio amplification module, the pulse width modulation module, the drive amplification module and the switch control and silence module, therefore, the invention can efficiently achieve the effects of lowering the cost, saving the power, outputting signals with large current and high power and having high efficience.
Description
Technical field
The present invention relates to the high-power vehicle external amplifier of a kind of generation, relate in particular to a kind of vehicle external amplifier of exporting large electric current, high power audio frequency signal.
Background technology
Because masses more and more pay attention to for quality of life, therefore relative also more and more high for the Music Appreciation effect requirements, yet the effect of the audio of stereo set and shock can't reach car owner's requirement in the general car, as want the shock effect of music in the lifting car, then need connect in addition an automobile-used enlarger and just can reach the desired level of car owner.Therefore having many car owners all can require the car trader to append automobile-used enlarger equipment when buying more new car or oneself buy more separately slowly become present car owner and enjoyed the indispensable equipment of shock music so add automobile-used enlarger.
In traditional automobile-used enlarger, modal simulated power amplifier mostly is made of class ab ammplifier.Described class ab ammplifier framework provides good total harmonic distortion usefulness, belong to a kind of of linear audio amplifier, this amplifier consists of a Linear actuator at output with the transistor group traditionally and limits voltage amplitude in the output loading, and make amplifier can be operated in linear zone, therefore, cause a large amount of power losss in the transistor of output stage, so that the class ab ammplifier whole efficiency is not good.
In addition, the power of vehicle above because of traditional 20W (watt) amplifies (abbreviation power amplifier), in design must be additionally be required high-voltage value by booster circuit with power supply 12V (volt) boost conversion of automobile, as boost to more than the 48V (volt), and then to supply the power supply of amplifier section circuit (such as aforementioned class ab ammplifier), above-mentioned amplifier section circuit connect and established power supply and be necessary for duplicate supply this moment, and because of aforementioned booster circuit in the transfer process of energy, have the loss of about 10%-20%, above-mentioned class ab ammplifier can produce a large amount of energy losses under high-voltage large current again, therefore, so that the efficient of whole power amplification generally only can reach about 40%-60%, for instance, if class ab ammplifier with the power amplification of 500W (watt), peak efficiency only is 60%.
Therefore, it can cause aforementioned power conversion loss and produce a large amount of energy losses on the one hand, on the other hand when the more loud relatively power consumption of sound also larger, and then the high heat that produces needs again be dispelled the heat by fin, so that the integral production cost improves and again power consumption.
The above, have following shortcoming in the prior art:
1. increase production cost.
2. power consumption is large.
3. power amplification efficient is low.
Therefore, how to solve above-mentioned existing problem and shortcoming, for the inventor and the relevant manufacturer that is engaged in the industry desire most ardently the direction place that research improves.
Summary of the invention
For effectively solving the above problems, main purpose of the present invention provides a kind of high high-power vehicle external amplifier of generation of large electric current, high power audio frequency signal and efficient of exporting.
Secondary objective of the present invention provides a kind of high-power vehicle external amplifier of generation that can reduce cost.
Secondary objective of the present invention provides a kind of high-power vehicle external amplifier of generation that can lower power consumption.
Secondary objective of the present invention provides a kind of power supply of direct use Vehicular battery, and without the high-power vehicle external amplifier of the generation of booster circuit.
For reaching above-mentioned purpose, the invention provides the high-power vehicle external amplifier of a kind of generation, comprise: an audio-frequency amplification module, it has the source of sound amplifying unit of a reception input audio signal, and the reversed phase unit that aforementioned audio signal is carried out the signal paraphase, and aforementioned source of sound amplifying unit couples this reversed phase unit; One pulse-width modulation module is electrically connected this audio-frequency amplification module, makes comparisons according to the signal that receives the transmission of this reversed phase unit and source of sound amplifying unit and the signal in it, produces a pwm signal; One drive amplification module, it couples this pulse-width modulation module, and has an output stage unit and a power amplification unit, controls this output stage unit and through this power amplification unit amplification and filtering within it, produces a high electric current audio signal according to aforementioned pwm signal; The control of one switch and quiet module, it receives a control signal, is used for controlling aforementioned drive amplification module; An and filter power supply supply module, it has a power filter unit and a power-supply unit, this power filter unit is electrically connected to respectively this power amplification unit, switch control and quiet module and power-supply unit, and this power-supply unit is electrically connected with this audio-frequency amplification module, pulse-width modulation module and drive amplification module respectively.
The beneficial effect that the present invention has is can effectively reach to reduce cost and lower power consumption, and has again output large electric current, high power signals and the high effect of efficient.
Description of drawings
Fig. 1 is the block schematic diagram of vehicle external amplifier of the present invention;
Fig. 2 is another block schematic diagram of vehicle external amplifier of the present invention;
Fig. 3 is the circuit diagram of vehicle external amplifier of the present invention;
Fig. 4 is another circuit diagram of vehicle external amplifier of the present invention.
Reference numerals list
Audio-frequency amplification module ... 1 the 12 resistance ... R12
Source of sound amplifying unit ... 10 the 13 resistance ... R13
Reversed phase unit ... 12 the 14 resistance ... R14
Pulse-width modulation module ... 2 the 15 resistance ... R15
Square wave generation unit ... 20 the 16 resistance ... R16
Triangular wave generation unit ... 22 the 17 resistance ... R17
The first pulse-width modulation unit ... 23 the 18 resistance ... R18
The second pulse-width modulation unit ... 24 the 19 resistance ... R19
Drive amplification module ... 3 the 20 resistance ... R20
Output stage unit ... 31 the 21 resistance ... R21
The first output driving device ... 311 the 21 resistance ... R21
The second output driving device ... 312 the 22 resistance ... R22
Power amplification unit ... 33 the 23 resistance ... R23
The first amplifying device ... 331 the 23 resistance ... R23 '
The second amplifying device ... 332 the 24 resistance ... R24
Switch control and quiet module ... 4 the 24 resistance ... R24 '
First end ... 41 the 25 resistance ... R25
The second end ... 42 the 25 resistance ... R25 '
The 3rd end ... 43 the 26 resistance ... R26
Filter power supply supply module ... 5 the 26 resistance ... R26 '
Power filter unit ... 50 the 27 resistance ... R27
Power-supply unit ... 52 the 27 resistance ... R27 '
Vehicular battery ... 6 the 28 resistance ... R28
Loud speaker ... 7 the 29 resistance ... R29
The first capacitive element ... C1 the 30 resistance ... R30
The second capacitive element ... C2 the 31 resistance ... R31
The 3rd capacitive element ... C3 the 32 resistance ... R32
The 4th capacitive element ... C4 the 33 resistance ... R33
The 5th capacitive element ... C5 the 34 resistance ... R34
The 6th capacitive element ... C6 the 35 resistance ... R35
The 7th capacitive element ... C7 the 36 resistance ... R36
The 8th capacitive element ... C8 the 37 resistance ... R37
The 9th capacitive element ... C9 the 38 resistance ... R38
The tenth capacitive element ... C10 the 39 resistance ... R39
The 11 capacitive element ... C11 the 40 resistance ... R40
The 12 capacitive element ... C12 the 41 resistance ... R41
The 13 capacitive element ... C13 the 42 resistance ... R42
The 13 capacitive element ... C13 ' the first diode ... D1
The 14 capacitive element ... C14 the second diode ... D2
The 14 capacitive element ... C14 ' the 3rd diode ... D3
The 15 capacitive element ... C15 the 3rd diode ... D3 '
The 15 capacitive element ... C15 ' the 4th diode ... D4
The 16 capacitive element ... C16 the 5th diode ... D5
The 16 capacitive element ... C16 ' the first zener diode ... Z1
The 17 capacitive element ... C17 the second zener diode ... Z2
The 18 capacitive element ... C18 the 3rd zener diode ... Z3
The 19 capacitive element ... C19 the first bipolar transistor ... Q1
The 20 capacitive element ... C20 the first bipolar transistor ... Q1 '
The 21 capacitive element ... C21 the second bipolar transistor ... Q2
The 22 capacitive element ... C22 the second bipolar transistor ... Q2 '
The 23 capacitive element ... C23 the 3rd bipolar transistor ... Q3
The 24 capacitive element ... C24 the 4th bipolar transistor ... Q4
The 25 capacitive element ... C25 the 5th bipolar transistor ... Q5
The 26 capacitive element ... C26 mosfet transistor ... U
Capacitance component ... C mosfet transistor ... U '
Inductive component ... L the one D type flip-flop ... DF1
The first inductance spare ... L1 the 2nd D type flip-flop ... DF2
The first inductance spare ... L1 ' the 3rd D type flip-flop ... DF3
The first resistance ... R1 the first nmos pass transistor ... N1
The second resistance ... R2 the second nmos pass transistor ... N2
The 3rd resistance ... R3 the first operational amplifier ... A1
The 4th resistance ... R4 the second operational amplifier ... A2
The 5th resistance ... R5 the 3rd operational amplifier ... A3
The 6th resistance ... R6 four-operational amplifier ... A4
The 7th resistance ... R7 the 5th operational amplifier ... A5
The 8th resistance ... R8 the 6th operational amplifier ... A6
The 9th resistance ... R9 sound source connector ... J
The tenth resistance ... R10 voltage source ... VCC
The 11 resistance ... R11 earth terminal ... GND
Embodiment
Characteristic on above-mentioned purpose of the present invention and structure thereof and the function is explained in connection with the preferred embodiment of accompanying drawing.
Please in the lump referring to Fig. 1, shown in Figure 2, the present invention is the high-power vehicle external amplifier of a kind of generation, in a preferred embodiment of the present invention, described vehicle external amplifier comprises an audio-frequency amplification module 1, a pulse-width modulation module 2, a drive amplification module 3, switch control and quiet module 4 and a filter power supply supply module 5, aforementioned audio-frequency amplification module 1 has the source of sound amplifying unit 10 of a reception input audio signal, and the reversed phase unit 12 that aforementioned audio signal is carried out the signal paraphase, and this source of sound amplifying unit 10 couples this reversed phase unit 12; The voice signal that transmits for electronic product in the automobile of aforementioned audio signal wherein.
This pulse-width modulation module 2 is electrically connected to this audio-frequency amplification module 1, and compare with its interior signal according to the signal that this reversed phase unit 12 that receives and source of sound amplifying unit 10 transmit, produce a PWM (pulse width modulation: Pulse Width Modulation) signal.This drive amplification module 3 has an output stage unit 31 and a power amplification unit 33, this output stage unit 31 is controlled the switch conduction in it according to the aforementioned pwm signal that receives and is closed, amplify to reach through this power amplification unit 33 more simultaneously and carry out filtering within it, produce a high electric current audio signal.
Aforementioned switches control and quiet module 4 receive a control signal, be used for controlling this drive amplification module 3, in other words, that is to say that power supply that the control of this switch and quiet module 4 are controlled the output stage unit 31 of aforementioned drive amplification module 3 and power amplification unit 33 according to the control signal that receives opens and closes and close the output (such as quiet function) of aforementioned high electric current audio signal.Aforementioned filter power supply supply module 5 has a power filter unit 50 and a power-supply unit 52, this power filter unit 50 is electrically connected with this power amplification unit 33, switch control and quiet module 4 and power-supply unit 52 respectively, and aforementioned power source feeding unit 52 couples respectively aforementioned audio-frequency amplification module 1, pulse-width modulation module 2 and drive amplification module 3.
Aforementioned power source filter unit 50 couples a Vehicular battery 6, is used for power filter to aforementioned Vehicular battery 6, and respectively aforementioned filtered power supply is supplied to this power-supply unit 52, switch control and quiet module 4 and power amplification unit 33; Aforementioned power source feeding unit 52 is used to provide power supply to this audio-frequency amplification module 1, pulse-width modulation module 2, drive amplification module 3 and switch control and quiet module 4.
Then referring to shown in Figure 2, aforementioned pulse-width modulation module 2 comprises a square wave generation unit 20, a triangular wave generation unit 22, one first pulse-width modulation unit 23 and one second pulse-width modulation unit 24, this square wave generation unit 20 is electrically connected aforementioned power source feeding unit 52, be used for producing a square-wave signal, 22 of this triangular wave generation units couple mutually with described square wave generation unit 20, and the aforementioned square-wave signal that is used for receiving is converted into a triangular signal.
Aforementioned the first pulse-width modulation unit 23 couples respectively this triangular wave generation unit 22 and reversed phase unit 12, and after comparing according to the aforementioned triangular signal that both produce and a paraphase audio signal, produces one first pwm signal; 24 of this second pulse-width modulation unit are electrically connected with aforementioned source of sound amplifying unit 10 and triangular wave generation unit 22 respectively, and after comparing according to the aforementioned amplification audio signal that both produce and triangular signal, to produce one second pwm signal; Wherein aforementioned pwm signal namely comprises this first pwm signal and the second pwm signal.
Aforementioned output stage unit 31 comprises one first output driving device 311 and one second output driving device 312, this is first years old, two output driving devices 311,312 respectively with aforementioned first, two pulse- width modulation unit 23,24 and power-supply unit 52 connect, and according to receiving first, two pwm signals are controlled the switch motion in it, for example this moment, this first pwm signal was that these the first output driving device 311 its interior switches of control are conducting or cut-off state, this second pwm signal is controlled the second output driving device 312 switches in it and is cut-off or conducting state simultaneously, so that aforementioned output driving device 311,312 according to aforementioned first, two pwm signals are after switching between high potential and the electronegative potential, amplify and filtering within it through described power amplification unit 33 again, to produce aforementioned high electric current audio signal; Wherein aforementioned each output driving device alternation is very fast in the switching speed of conducting and cut-off state, thereby efficient is high, so the heat that produces is also very low.
Aforementioned power amplifying unit 33 has one first amplifying device 331 and one second amplifying device 332, and this first and second amplifying device 331,332 couples mutually with this first and second output driving device 311,312, power-supply unit 52, switch control and quiet module 4 and power filter unit 50 respectively; In addition, aforementioned power amplifying unit 33 is electrically connected a loud speaker 7, that is to say that first and second amplifying device 331,332 of this power amplification unit 33 couples respectively positive terminal and the negative pole end of this loud speaker 7, and by aforementioned first and second amplifying device 331,332 amplifications and the low-pass filter circuit filtering in each thereof, to produce aforementioned this loud speaker 7 of high electric current audio-signal-driven; Wherein aforementioned loud speaker 7 is loudspeaker, is used for playing aforementioned high electric current audio signal.
Please referring to shown in Figure 2, aforementioned switches control and quiet module 4 have a first end 41, one second end 42 and one the 3rd end 43, this first end 41 is electrically connected with aforementioned power amplifying unit 33, this second end 42 couples this power filter unit 50, it is used for receiving the power supply via Vehicular battery 6 transmission of these power filter unit 50 filtering, 43 control signals that are used for receiving aforementioned input of the 3rd end.
Continuation is put up with each structure and is described in detail referring to Fig. 2, shown in Figure 3:
The source of sound amplifying unit 10 of aforementioned audio-frequency amplification module 1 is provided with two the first capacitive element C1, one first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, one sound source connector J and one first operational amplifier A 1, aforementioned each the first capacitive element C1 one end is electrically connected with this sound source connector J respectively, its other end then couples respectively an end of this first resistance R 1 and the second resistance R 2, the positive input terminal of this first operational amplifier A 1 couples mutually with the other end of this second resistance R 2 and an end of the 4th resistance R 4, its negative input end then is electrically connected with the other end of this first resistance R 1 and an end of the 3rd resistance R 3, its output is electrically connected the other end of the 3rd resistance R 3, and this output is used for exporting the audio signal after the aforementioned amplification; Wherein the other end of the 4th resistance R 4 and a voltage source V CC couple, and aforementioned sound source connector J is used for for being connected with the plug of a corresponding electronic product (not shown).
Aforementioned reversed phase unit 12 is provided with one the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and one second operational amplifier A 2, the negative input end of this second operational amplifier A 2 is electrically connected with an end of the 5th resistance R 5 and an end of the 7th resistance R 7 respectively, its positive input terminal then couples with an end of the 6th resistance R 6, its output couples the other end of aforementioned the 7th resistance R 7, and the other end of the 5th resistance R 5 and the 6th resistance R 6 couples respectively output and the aforementioned electric potential source VCC of this first operational amplifier A 1; Wherein this output is used for exporting described paraphase audio signal.
Described square wave generation unit 20 comprises one the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the second capacitive element C2, the 3rd capacitive element C3, the 4th capacitive element C4, the first diode D1, the second diode D2, the one D type flip-flop DF1, the 2nd D type flip-flop DF2 and the 3rd D type flip-flop DF3, aforementioned each D type flip-flop has 14 pin positions, wherein the one first pin position of a D type flip-flop DF1 couples mutually with the end of the 9th resistance R 9 and the first diode D1 respectively, and the end of one second pin position and this second diode D2 and an end of the tenth resistance R 10 are electrically connected.One the 3rd pin position is electrically connected one the 5th pin position in it, and an end of this second capacitive element C2 and the 8th resistance R 8 is followed respectively in one the 4th pin position, and the other end of above-mentioned the 9th resistance R 9 and the first diode D1 couples together mutually; One the 6th pin position then couples with the other end of aforementioned the 3rd capacitive element C3 one end, this second diode D2 and the tenth resistance R 10 respectively mutually, and wherein the other end of the 8th resistance R 8, the second capacitive element C2 and the 3rd capacitive element C3 is connected with an earth terminal GND respectively.
One the 8th pin position of aforementioned the 2nd D type flip-flop DF2 and the tenth pin position and above-mentioned earth terminal GND are electrically connected, and one the 9th pin position then couples the 12 pin position; And 1 the 11 pin position is coupled to the end joint of the 9th resistance R 9 and the first diode D1, and 1 the 13 pin position then couples with above-mentioned triangular wave generation unit 22, and it exports aforementioned square-wave signal.The 14 a pin position of the 3rd D type flip-flop DF3 couples respectively the 5th pin position of the 4th capacitive element C4 one end and a D type flip-flop DF1, and its 7th pin position then is electrically connected with the other end of the 4th capacitive element C4 and earth terminal GND.
Continue again referring to shown in Figure 3, described triangular wave generation unit 22 is provided with 1 the 11 resistance R 11, the 5th capacitive element C5 and the 6th capacitive element C6, one end of aforementioned the 11 resistance R 11 is coupled to the 13 pin position of the 2nd D type flip-flop DF2, the end of the other end and the 5th, six capacitive element C5, C6 is electrically connected mutually, and the other end of the 5th capacitive element C5 and this earth terminal GND couple, the other end of aforementioned the 6th capacitive element C6 and this first and second pulse- width modulation unit 23,24 join, and are used for exporting aforementioned triangular signal.
This first pulse-width modulation unit 23 comprises 1 the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the 7th capacitive element C7, the 8th capacitive element C8, the 9th capacitive element C9, the 3rd operational amplifier A 3 and four-operational amplifier A4 consist of, the positive input terminal of aforementioned the 3rd operational amplifier A 3 couples respectively an end of the 12 resistance R 12 and the 13 resistance R 13, negative input end then couples mutually with the end of the 14 resistance R 14 and the 8th capacitive element C8, and output is electrically connected at respectively the joint of the other end of an end of the 16 resistance R 16 and the 8th capacitive element C8.
The other end of aforementioned the 14 resistance R 14 couples the other end of the 15 resistance R 15, and aforementioned both other end couples with aforementioned electric potential source VCC together mutually, the other end of the 12 resistance R 12 is electrically connected the end of the 7th capacitive element C7, and the other end of described the 7th capacitive element C7 then is coupled to the output of the second operational amplifier A 2, and an end of the 17 resistance R 17 is connected with the other end of above-mentioned the 13 resistance R 13, and the end of its other end and the 9th capacitive element C9 is electrically connected.
The negative input end of this four-operational amplifier A4 and the other end of the 16 resistance R 16 couple, and be electrically connected to again the joint of the other end of the 17 resistance R 17 and the 9th capacitive element C9, its positive input terminal is connected with the other end of the 15 resistance R 15, the other end of the 6th capacitive element C6 respectively, its output then is electrically connected with the first output driving device 311, and it is used for exporting aforementioned the first pwm signal.
This second pulse-width modulation unit 24 comprises 1 the 18 resistance R 18, the 19 resistance R 19, the 20 resistance R 20, the 21 resistance R 21, the 22 resistance R 22, the tenth capacitive element C10, the 11 capacitive element C11, the 12 capacitive element C12, the 5th operational amplifier A 5 and the 6th operational amplifier A 6, the positive input terminal of aforementioned the 5th operational amplifier A 5 couples respectively an end of the 18 resistance R 18 and the 20 resistance R 20, negative input end then couples mutually with the end of the 19 resistance R 19 and the 11 capacitive element C11, and output is electrically connected at respectively the joint of the other end of an end of the 21 resistance R 21 and the 11 capacitive element C11.
The other end of aforementioned the 18 resistance R 18 is electrically connected the end of the tenth capacitive element C10, and the other end of described the tenth capacitive element C10 then is coupled to the output of the first operational amplifier A 1, and an end of the 22 resistance R 22 is connected with the other end of above-mentioned the 20 resistance R 20, the end of its other end and the 12 capacitive element C12 is electrically connected, and the other end of the 19 resistance R 19 and voltage source V CC couple.
The negative input end of the 6th operational amplifier A 6 and the other end of the 21 resistance R 21 couple, and be electrically connected to again the joint of the other end of the 22 resistance R 22 and the 12 capacitive element C12, its positive input terminal is electrically connected to the positive input terminal of aforementioned four-operational amplifier A4, its output then is connected with the second output driving device 312, and it is used for exporting aforementioned the second pwm signal.
Please referring again to Fig. 2, shown in Figure 3, described the first output driving device 311 comprises one the 23 resistance R 23, the 24 resistance R 24, the 25 resistance R 25, the 13 capacitive element C13, the 14 capacitive element C14, the 3rd diode D3 and a MOSFET (MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor): Metal-Oxide-Semiconductor Field-Effect Transistor) transistor U, aforementioned mosfet transistor U has eight pin positions, wherein one first pin position couples mutually with the cathode terminal of the 3rd diode D3 and the end of the 14 capacitive element C14 respectively, and the other end of aforementioned the 14 capacitive element C14 and one the 7th pin position join, and one second pin position is electrically connected respectively an end of the 24 resistance R 24 and the output of four-operational amplifier A4.
One the 3rd pin position of one end of aforementioned the 25 resistance R 25 and this mosfet transistor U couples, and its other end joins with this earth terminal GND and one the 6th pin position respectively; One the 4th pin position couples mutually with an end of the other end, the 13 capacitive element C13 and the 23 resistance R 23 of the 24 resistance R 24 respectively, and the other end of aforementioned the 13 capacitive element C13 is connected with earth terminal GND, and the other end of the 23 resistance R 23 is electrically connected the 14 pin position of the 3rd D type flip-flop DF3; One the 8th pin position and one the 5th pin position are connected with above-mentioned the first amplifying device 331 respectively.
The overall structure of described the second output driving device 312 and inter-module connection relationship are roughly identical with aforementioned the first output driving device 311, this in addition superfluous telling mutually exist together, comparing the first output driving device 311 at this second output driving device 312 does not exist together and couples mutually with the 3rd pin position of the mosfet transistor U of aforementioned the first output driving device 311 and switch control and quiet module 4 respectively for the 3rd pin position of the mosfet transistor U ' of this second output driving device 312, and the 23 resistance R 23 in it ' an end and the 4th pin position, the 24 resistance R 24 ' the other end, the end of the 13 capacitive element C13 ' is electrically connected, and the other end couples the other end of the 23 resistance R 23 of this first output driving device 311.
And, the second pin position of the mosfet transistor U ' of this second output driving device 312 couples mutually with an end of the output of the 6th operational amplifier A 6 and interior the 24 resistance R 24 thereof respectively, and the 8th pin position and the 5th pin position in it are connected with this second amplifying device 332 respectively.
Please continue referring to shown in Figure 3, aforementioned the first amplifying device 331 has one first nmos pass transistor N1, the second nmos pass transistor N2, the 26 resistance R 26, the 27 resistance R 27, the first inductance spare L1, the 15 capacitive element C15 and the 16 capacitive element 16, aforementioned first, bi-NMOS transistor N1, the gate terminal of N2 respectively with the 8th of the mosfet transistor U of this first output driving device 311, five pin positions are electrically connected, and the source terminal of this first nmos pass transistor N1 then respectively with the drain electrode end of the second nmos pass transistor N2, the 7th pin position of the mosfet transistor U of this first output driving device 311, the end of the 26 resistance R 26 and the first inductance spare L1 couples mutually; Wherein the end of an end of aforementioned the 26 resistance R 26 and the first inductance spare L1 mutually the signal at the place of coupling be that aforementioned the first pwm signal is input to the one first high electric current pwm signal that this first and second nmos pass transistor N1, N2 amplify rear generation.
The drain electrode end of aforementioned the first nmos pass transistor N1 joins with the other end of the 26 resistance R 26 and described voltage source V CC, and the source terminal of this second nmos pass transistor N2 then is coupled to this earth terminal GND; And the positive pole of the other end of this first inductance spare L1 and an end, the 17 resistance R 17 1 ends and the loud speaker 7 of the 15 to the 18 capacitive element C15-C18 is electrically connected, one end of the other end of the 15 capacitive element C15 and the 27 resistance R 27 is coupled to earth terminal GND, and the other end of the other end of aforementioned the 16 capacitive element C16, the other end of the 27 resistance R 27 and described the 9th capacitive element C9 is electrically connected; Wherein the other end and the 15 capacitive element C15 of this first inductance spare L1 form described low-pass filter circuit, it is used for the unnecessary high-frequency signal of filtering, and the end of the other end of aforementioned the first inductance spare L1 and the 15 capacitive element C15 mutually signal at the place of coupling is after described low-pass filter circuit carries out filtering to the above-mentioned first high electric current pwm signal of flowing through, the aforementioned high electric current audio signal of generation.
The end of one the 28 to the 30 resistance R 28-R30 and the other end of described the 17,18 capacitive element C17, C18 are electrically connected, its other end then is electrically connected with the negative pole of loud speaker 7, makes the other end of the end of the 18 capacitive element C18 and the 30 resistance R 30 to export aforementioned high electric current audio-signal-driven loud speaker 7.
Described the second amplifying device 332 its overall structures and inter-module connection relationship are roughly identical with aforementioned the first amplifying device 331, this in addition superfluous telling mutually exist together, comparing the first amplifying device 331 at this second amplifying device 332 does not exist together and is first of this second amplifying device 332, bi-NMOS transistor N1 ', the gate terminal of N2 ' respectively with the 8th of the mosfet transistor U ' of aforementioned the second output driving device 312, five pin positions are electrically connected, and the end of the 16 capacitive element C16 ' system couples the other end and described the 22 resistance R 22 1 ends of this first inductance spare L1 ' and the 28 resistance R 28, its other end then with the 27 resistance R 27 ' an end and the other end of the 12 capacitive element C12 be electrically connected, aforementioned the 27 resistance R 27 ' the other end then be coupled to earth terminal GND.
And, the 26 resistance R 26 in this second amplifying device 332 ' an end and the first inductance spare L1 ' an end mutually the signal at the place of coupling be after aforementioned the second pwm signal is input to this first and second nmos pass transistor N1 ', N2 ' and amplifies, the one second high electric current pwm signal that produces, and the end of the other end of this first inductance spare L1 ' and the 15 capacitive element C15 ' mutually the signal at the place of coupling be after described low-pass filter circuit carries out filtering to the aforementioned second high electric current pwm signal of flowing through, the aforementioned high electric current audio signal of generation.
Then referring to Fig. 3, shown in Figure 4, aforementioned power source filter unit 50 has 8 capacitance component C and 2 Inductive component L, wherein the opposite end among of the 1st capacitance component C and the 2nd capacitance component C couples 1 Inductive component L, and the two ends of aforementioned the 1st capacitance component C are electrically connected with described Vehicular battery 6 again, and sequentially be connected in parallel respectively with all the other 6 capacitance components by the 2nd capacitance component C, the anode of the 2nd to the 8th capacitance component and described voltage source V CC and power-supply unit 52 is electrically connected again, its negative terminal directly and earth terminal GND couple.
This power-supply unit 52 comprises one the 31 to the 38 resistance R 31-R38, the 19 to the 25 capacitive element C19-C25, the first zener diode Z1, the second zener diode Z2, the 4th diode D4, the first bipolarity (Bipolar Junction Transistor, hereinafter to be referred as BJT) transistor Q1, the second bipolarity (Bipolar Junction Transistor, hereinafter to be referred as BJT) transistor Q2 and the 3rd bipolarity (Bipolar Junction Transistor, hereinafter to be referred as BJT) transistor Q3, the base stage of an aforementioned BJT transistor Q1 couples mutually with an end of the 31 resistance R 31 and the 32 resistance R 32, and its emitter-base bandgap grading couples the anode of the 8th capacitance component C of the other end of the 31 resistance R 31 and described power filter unit 50.
And, the collector electrode of aforementioned the 3rd BJT transistor Q3 and the other end of the 32 resistance R 32 are electrically connected, its emitter-base bandgap grading directly couples earth terminal GND, its base stage then couples the positive pole of this second zener diode Z2, the negative pole of aforementioned the second zener diode Z2 respectively with the 37 resistance R 37, the end of the 25 capacitive element C25 and the 4th diode D4 is electrically connected, and the other end of the 4th diode D4 and the 37 resistance R 37 couples mutually with an end of the 38 resistance R 38, the aforementioned mutually place of coupling is the control signal input, in brief, this control signal is coupled the input signal at place by an end of the other end of aforementioned the 4th diode D4 and the 37 resistance R 37 and the 38 resistance R 38.
The collector electrode and the 33 of described the 2nd BJT transistor Q2,35,36 resistance R 33, R35, the collector electrode of the end of R36 and a BJT transistor Q1 is electrically connected, wherein the other end of the 33 resistance R 33 respectively with the 34 resistance R 34, an end and the voltage source V CC of the 19 capacitive element C19 and the 20 capacitive element C20 couple mutually, the end of the other end of aforementioned the 35 resistance R 35 and the 21 capacitive element C21 and the 22 capacitive element C22 and described voltage source V CC are electrically connected, and the other end and the earth terminal GND of the other end of the 34 resistance R 34 and the 19 to the 22 capacitive element C19-C22 couple mutually.
The base stage of the 2nd BJT transistor Q2 is electrically connected with the end of the other end, the first zener diode Z1 and the 23 capacitive element C23 of the 36 resistance R 36 respectively, the end of its emitter-base bandgap grading and the 24 capacitive element C24 and aforementioned first and second output driving device 311, each the 23 resistance 23,23 of 312 ' the other end couple mutually, and the other end of the 23,24 capacitive element C23, C24 and the first zener diode Z1 is connected with earth terminal GND respectively.
Continuation is referring to Fig. 3, shown in Figure 4, this switch control and quiet module 4 have one the 39 to the 42 resistance R 39-R42, the 26 capacitive element C26, the 5th diode D5, the 3rd zener diode Z3, the 4th bipolarity (Bipolar Junction Transistor, hereinafter to be referred as BJT) transistor Q4 and the 5th bipolarity (Bipolar Junction Transistor, hereinafter to be referred as BJT) transistor Q5, the base stage of aforementioned the 4th BJT transistor Q4 couples the end of the 3rd zener diode Z3, one end of its emitter-base bandgap grading and the 26 capacitor C 26 is coupled to this earth terminal GND, one end of its collector electrode and the 41 resistance R 41 couples, and the other end of described the 3rd zener diode Z3 is electrically connected with an end of the 5th diode D5 and the 39 resistance R 39 and the other end of the 26 capacitive element C26 respectively; After wherein the other end of aforementioned the 39 resistance R 39 and the 5th diode D5 couples mutually, and be electrically connected with the other end of aforementioned the 4th diode D4 and the 37 resistance R 37 and an end place of coupling of the 38 resistance R 38 again, so that described control signal couples place's input signal by the other end of the 4th diode D4 and the 5th diode D5 respectively.
The base stage of aforementioned the 5th BJT transistor Q5 is electrically connected with an end of the 42 resistance R 42 and the other end of the 41 resistance R 41 respectively, its emitter-base bandgap grading couples mutually with the other end of the 42 resistance R 42 and the emitter-base bandgap grading of aforementioned the 2nd BJT transistor Q2, one end of its collector electrode and the 40 resistance R 40 is electrically connected, and the other end of aforementioned the 40 resistance R 40 then is electrically connected with the 3rd pin position of the mosfet transistor U ' of the second output driving device 312 again.
So when aforementioned vehicle external amplifier is external when establishing to the car, only need this vehicle external amplifier directly is arranged on the Vehicular battery 6 (such as 12V), and need not carry out voltage transitions by extra any circuit, and only need on the line single supply to connect to establish.Needing in the prior art by booster circuit is required high-voltage value with power supply 12V (volt) boost conversion of automobile, can produce a large amount of energy losses in the aforementioned booster circuit conversion, and being necessary for duplicate supply on circuit connects and establishes, and then cause the step in the wiring numerous and diverse, and the present invention directly uses the mode of the power supply of Vehicular battery 6, so that not only bring simple, convenient and rapidly in wiring, and can effectively reach again the effect of saving the integral production cost and lowering power consumption.
In addition, when if this moment, aforementioned vehicle external amplifier drove loud speaker 7 broadcast, receive aforementioned audio signal by the sound source connector J in this source of sound amplifying unit 10, and be sent to this source of sound amplifying unit 10 in it and carry out after signal amplifies, respectively the audio signal of amplifying is sent to the second pulse-width modulation unit 24 of this reversed phase unit 12 and this pulse-width modulation module 2, and aforementioned reversed phase unit 12 carries out the signal paraphase with the audio signal of amplifying, to produce described paraphase audio signal and to be sent to the first pulse-width modulation unit 23 of this pulse-width modulation module 2, simultaneously, the square-wave signal that this square wave generation unit 20 produces, after this triangular wave generation unit 22 is converted to triangular signal according to the square-wave signal that receives, be sent to respectively aforementioned first, two pulse-width modulation unit 23,24, so that make comparisons according to the paraphase audio signal and the triangular signal that receive in this first pulse-width modulation unit 23, to produce described the first pwm signal, and this second pulse-width modulation unit 24 makes comparisons according to audio signal and the triangular signal of the above-mentioned amplification that receives, to produce described the second pwm signal.
First of the output stage unit 31 of this drive amplification module 3, two output driving devices 311,312 respectively according to aforementioned first of reception, two pwm signals are controlled respectively the switch motion in it, and aforementioned mosfet transistor U, the 5th of U ', eight pin positions export respectively aforementioned first, two pwm signals are to first of aforementioned power amplifying unit 33, two amplifying devices 331,332, simultaneously, this is first years old, two amplifying devices 331, aforementioned first of 332 pairs of receptions, two pwm signals carry out producing aforementioned first after the power amplification, two high electric current pwm signals, in the process that aforementioned power is amplified, can will receive above-mentioned first by the low-pass filter circuit in it, behind the unnecessary high-frequency signal of two high electric current pwm signal filterings, to produce aforementioned high electric current audio-signal-driven loud speaker 7, therefore, have reducing production costs and lower power consumption so that reach on the one hand, reach on the other hand and have higher efficient and export large electric current, the effect that high power audio frequency signal and efficient are high.
The above, the high-power vehicle external amplifier of a kind of generation of the present invention, it has following advantages:
1. the effect that has the large electric current of output, high power audio frequency signal.
2. reduce production costs.
3. the effect that has power saving.
4. power amplification efficient is high.
5. compare existing automobile-used enlarger, the present invention need not additionally increase booster circuit and duplicate supply when winding or actual the use, so that integral body of the present invention when reality is implemented, is directly used and connect the Vehicular battery of establishing, and then can avoid the power conversion loss, to reach rapidly effect easily of assembling.
The above only be preferred embodiment of the present invention, but feature of the present invention is not limited to this, any those skilled in the art in field of the present invention, can think easily and variation or modify all should be encompassed in the claim of the present invention.
Claims (7)
1. one kind produces high-power vehicle external amplifier, it is characterized in that, comprising:
One audio-frequency amplification module, it has a source of sound amplifying unit that receives input audio signal, and a reversed phase unit that aforementioned audio signal is carried out the signal paraphase, and aforementioned source of sound amplifying unit couples described reversed phase unit;
One pulse-width modulation module, it is electrically connected described audio-frequency amplification module, makes comparisons according to the signal that receives the transmission of described reversed phase unit and source of sound amplifying unit and the signal in it, produces a pwm signal;
One drive amplification module, it couples described pulse-width modulation module, and has an output stage unit and a power amplification unit, controls described output stage unit and produces a high electric current audio signal through described power amplification unit amplification according to aforementioned pwm signal;
The control of one switch and quiet module, it receives a control signal, is used for controlling aforementioned drive amplification module; And
One filter power supply supply module, it has a power filter unit and a power-supply unit, described power filter unit couples respectively described power amplification unit, switch control and quiet module and power-supply unit, and described power-supply unit couples mutually with described audio-frequency amplification module, pulse-width modulation module and drive amplification module respectively.
2. the high-power vehicle external amplifier of generation as claimed in claim 1, it is characterized in that, described switch control and quiet module have a first end, one second end and one the 3rd end, described first end couples the aforementioned power amplifying unit, described the second end couples described power filter unit, and described the 3rd end is used for receiving aforementioned control signal.
3. the high-power vehicle external amplifier of generation as claimed in claim 1, it is characterized in that, described power filter unit couples a Vehicular battery, with the power filter to aforementioned Vehicular battery, and is supplied to respectively described power-supply unit, switch control and quiet module and power amplification unit.
4. the high-power vehicle external amplifier of generation as claimed in claim 1 is characterized in that, described pulse-width modulation module comprises:
One square wave generation unit, it is electrically connected described power-supply unit, is used for producing a square-wave signal;
One triangular wave generation unit, it couples mutually with described square wave generation unit, is used for aforementioned square-wave signal is converted to a triangular signal;
One first pulse-width modulation unit, it couples respectively described triangular wave generation unit and reversed phase unit, and makes comparisons according to the triangular signal of triangular wave generation unit generation and a paraphase audio signal of reversed phase unit generation, produces one first pwm signal; And
One second pulse-width modulation unit, it couples respectively described source of sound amplifying unit and triangular wave generation unit, and makes comparisons according to the amplification audio signal of source of sound amplifying unit generation and the triangular signal of triangular wave generation unit generation, produces one second pwm signal.
5. the high-power vehicle external amplifier of generation as claimed in claim 4, it is characterized in that, described output stage unit comprises one first output driving device and one second output driving device, described the first output driving device and aforementioned the first pulse-width modulation unit and power-supply unit are electrically connected, described the second output driving device and aforementioned the second pulse-width modulation unit and power-supply unit are electrically connected, and control respectively its interior switch motion according to receiving described first and second pwm signal.
6. the high-power vehicle external amplifier of generation as claimed in claim 5, it is characterized in that, described power amplification unit has one first amplifying device and one second amplifying device, described the first amplifying device couples mutually with described the first output driving device, power-supply unit, switch control and quiet module and power filter unit, and described the second amplifying device couples mutually with described the second output driving device, power-supply unit, switch control and quiet module and power filter unit.
7. such as the high-power vehicle external amplifier of each described generation in the claim 1 to 6, it is characterized in that, described power amplification unit is electrically connected a loud speaker, and by the described loud speaker of aforementioned high electric current audio-signal-driven.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910000182 CN101783988B (en) | 2009-01-15 | 2009-01-15 | Vehicle external amplifier for generating high power |
| JP2009132715A JP2010166544A (en) | 2009-01-15 | 2009-06-02 | External connection type in-vehicle amplifier capable of generating high power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910000182 CN101783988B (en) | 2009-01-15 | 2009-01-15 | Vehicle external amplifier for generating high power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101783988A CN101783988A (en) | 2010-07-21 |
| CN101783988B true CN101783988B (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910000182 Active CN101783988B (en) | 2009-01-15 | 2009-01-15 | Vehicle external amplifier for generating high power |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2010166544A (en) |
| CN (1) | CN101783988B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101796989B1 (en) | 2016-04-29 | 2017-11-13 | 현대자동차주식회사 | Amplifier for vehicle and vehicle thereof |
| CN107757469B (en) * | 2017-09-30 | 2019-08-20 | 浙江胜必得汽车配件科技有限公司 | A kind of snail loudspeaker |
| CN112109632B (en) * | 2020-09-23 | 2021-09-21 | 重庆凯瑞特种车有限公司 | Sanitation car facial make-up intelligence voice control system device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0216611A (en) * | 1988-07-05 | 1990-01-19 | Fujitsu Ltd | Constant-voltage power supply circuit |
| JP4048781B2 (en) * | 2002-01-08 | 2008-02-20 | ヤマハ株式会社 | Class D amplifier |
| JP2008113424A (en) * | 2006-10-03 | 2008-05-15 | Seiko Epson Corp | Control method of class-d amplifier, control circuit for class-d amplifier, driving circuit for capacitive load, transducer, ultrasonic speaker, display device, directional acoustic system, and printer |
| JP4710870B2 (en) * | 2007-05-10 | 2011-06-29 | ヤマハ株式会社 | Digital amplifier device and speaker device |
-
2009
- 2009-01-15 CN CN 200910000182 patent/CN101783988B/en active Active
- 2009-06-02 JP JP2009132715A patent/JP2010166544A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| JP平2-16611A 1990.01.19 |
| JP特開2008-283462A 2008.11.20 |
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| JP2010166544A (en) | 2010-07-29 |
| CN101783988A (en) | 2010-07-21 |
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