CN205911953U - Direct type digit power amplifier circuit - Google Patents
Direct type digit power amplifier circuit Download PDFInfo
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- CN205911953U CN205911953U CN201620895341.4U CN201620895341U CN205911953U CN 205911953 U CN205911953 U CN 205911953U CN 201620895341 U CN201620895341 U CN 201620895341U CN 205911953 U CN205911953 U CN 205911953U
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Abstract
The utility model discloses a direct type digit power amplifier circuit, including switching power supply circuit, energy recuperation circuit energy storage module and speaker, the direct current is connected to switching power supply circuit's one end, and switching power supply circuit is connected to the one end of energy storage module, and the minus earth of the positive pole of speaker, speaker is connected to the one end of energy storage module, the energy recuperation circuit is connected with the one end of energy storage module, and the direct current is still connected to this energy recuperation circuit, the energy recuperation circuit is used for feeding back the discharge charge who comes from the energy storage module to the direct current. Directly transform switching power supply circuit as digital power amplifier, transform the electromagnetic radiation that two independent frequencies of traditional digital power amplifier switching power supply and digital power amplifier had been solved to the back circuit for whole circuit reliability improves, and electromagnetic compatibility can improve.
Description
Technical field
The utility model is related to digital power amplifier technical field, more particularly, to direct-type digital power amplifier circuit.
Background technology
, it is known that service efficiency is high, distortion is little, has splendid transient response for conventional digital power amplifier.Thus conventional digital
Power amplifier takes advantage in power consumption, volume, performance, but conventional digital power amplifier collects in practical application and remains deficiency,
It is mainly manifested in following several aspect:
1. conventional digital power amplifier is essentially all to have that Switching Power Supply and digital power amplifier are dimerous, and components and parts are many, raw
Production. art is complicated.
2. conventional digital power amplifier has two different operating frequencies, the frequency of Switching Power Supply and the frequency of digital power amplifier
Individualism, therefore can cause the electromagnetic interference of integrated circuit to be difficult to process it is difficult to realize soft switch technique.
Content of the invention
For above-mentioned technical problem, the purpose of this utility model is to provide a kind of direct-type digital power amplifier circuit, directly
Switching power circuit is transform as digital power amplifier circuit, solves the deficiency of conventional digital power amplifier.
For achieving the above object, the utility model adopts the following technical scheme that
Direct-type digital power amplifier circuit, including switching power circuit, energy recovering circuit energy-storage module and loudspeaker, switchs
One end of power circuit connects direct current, one end connecting valve power circuit of energy-storage module, and one end of energy-storage module connects raises
The positive pole of sound device, the minus earth of loudspeaker；Described energy recovering circuit is connected with one end of energy-storage module, and this energy regenerating
Circuit is also connected with direct current；
Wherein, energy recovering circuit is used for for the discharge charge from energy-storage module feeding back to direct current.
Preferably, described switching power circuit is buck reduction voltage circuit, and described energy recovering circuit rises piezoelectricity for boost
Road.
Preferably, buck reduction voltage circuit includes first switch pipe, fly-wheel diode and low pass filter, and boost rises piezoelectricity
Road includes second switch pipe, energy conversion module and isolating diode；The drain electrode of first switch pipe, isolating diode negative pole equal
Connect direct current；The source electrode of first switch pipe, the negative pole of fly-wheel diode and energy conversion module connect the one of low pass filter
End；The drain electrode of second switch pipe, the positive pole of isolating diode connect energy conversion module；Energy-storage module connects low pass filter
The other end, the grid of the grid of first switch pipe and second switch pipe connects modulated signal output end.
Preferably, described buck reduction voltage circuit includes first switch pipe, fly-wheel diode and low pass filter, boost liter
Volt circuit includes second switch pipe and isolating diode；The negative pole of the drain electrode of first switch pipe and isolating diode is all connected with direct current
Electricity；The source electrode of first switch pipe, the negative pole of fly-wheel diode, the drain electrode of second switch pipe, the positive pole of isolating diode are all connected with
One end of low pass filter, energy-storage module connects the other end, the grid of first switch pipe and the second switch pipe of low pass filter
Grid connect modulated signal output end.
Preferably, described switching power circuit is buck-boost converter, and this buck-boost converter is dropped by buck
Volt circuit and boost booster circuit are in series, and this buck reduction voltage circuit and boost booster circuit same switching tube altogether.
Preferably, this buck-boost converter includes inductance, switching tube, diode and electric capacity；One end of inductance with straight
Stream electrical connection, the drain electrode of the other end of inductance and switching tube is all connected with the positive pole of diode, the negative pole of diode, the one of electric capacity
End and energy recovering circuit are all connected with one end of energy-storage module；The source electrode of switching tube, the other end equal earthed switch pipe of electric capacity
Grid connect a modulated signal output end.
Preferably, buck-boost converter includes inductance, switching tube, diode and electric capacity, and the drain electrode of switching tube connects
Direct current, one end of the source electrode of switching tube and inductance l is all connected with the negative pole of diode, the positive pole of diode, one end of electric capacity
All it is connected with one end of energy-storage module with energy recovering circuit, the other end ground connection of electric capacity, the grid of switching tube connects a modulation
Signal output part.
Preferably, described switching power circuit is semi-bridge type isolating switch power circuit, this semi-bridge type isolating switch power
The input of circuit connects modulated signal output end, and the output end of semi-bridge type isolating switch power circuit connects energy regenerating electricity
Road.
Compared to existing technology, the beneficial effects of the utility model are:
The utility model directly transform switching power circuit as digital power amplifier, so that global reliability is improved, electromagnetic compatibility
Performance boost, is modulated to switch power circuit with audio frequency source signal, and it is recorded and carrys out self-feedback ciucuit change before voltage has
Burning voltage, and being changed into reference signal is an audio frequency source signal being continually changing, and makes load output voltage by audio source
The change of signal and change.
Brief description
Fig. 1 is real-time schematic diagram of the present utility model；
Fig. 2 is the circuit structure diagram of the utility model embodiment one；
Fig. 3 is the first step equivalent schematic of the utility model embodiment one；
Fig. 4 is the second step equivalent schematic of the utility model embodiment one；
Fig. 5 is the 3rd step equivalent schematic of the utility model embodiment one；
Fig. 6 is the 4th step equivalent schematic of the utility model embodiment one；
Fig. 7 is the circuit structure diagram of the utility model embodiment two；
Fig. 8 is the circuit structure diagram of the utility model embodiment three；
Fig. 9 is the circuit structure diagram of the utility model example IV；
Figure 10 is the circuit structure diagram of the utility model embodiment five.
Specific embodiment
Below, in conjunction with accompanying drawing and specific embodiment, the utility model is described further:
Referring to Fig. 1, the utility model is transformed to switching power circuit, in traditional switch power circuit, load current
For unidirectional, the electric current of digital power amplifier audio frequency source signal is two-way, and therefore output end increases energy recovering circuit, uses audio frequency source signal
Split powered-down source sampling end and energy recovering circuit are modulated, by the electric discharge electricity to output filter capacitor for the energy recovering circuit
Lotus is reclaimed to power supply, that is, achieve energy regenerating, and another audio frequency source signal completely presents at load resistance end.
For realizing the purpose of this utility model, the direct-type digital power amplifier circuit that the utility model provides includes Switching Power Supply
Circuit, energy recovering circuit, electric capacity c1, energy-storage module and loudspeaker s, one end of switching power circuit and electric capacity c1 connects direct current
The other end ground connection of electric vcc, electric capacity c1, one end connecting valve power circuit of energy-storage module, one end of energy-storage module connects raises
The positive pole of sound device s, the minus earth of loudspeaker s；Energy recovering circuit is connected with one end of energy-storage module, and this energy regenerating electricity
Road is also connected with direct current vcc.Energy recovering circuit is used for for the discharge charge from energy-storage module feeding back to direct current vcc.Storage
Electric capacity c2 in energy module bitmap 1.
Embodiment one:
Referring to Fig. 2, in the present embodiment, switching power circuit is buck reduction voltage circuit, and described energy recovering circuit is boost
Booster circuit；This buck reduction voltage circuit includes mos pipe q2, diode d1, inductance l and electric capacity c3, described boost booster circuit
Including inductance l1, mos pipe q1 and diode d2；One end of the drain electrode, the negative pole of diode d2 and electric capacity c1 of described mso pipe q2 is equal
It is connected with direct current vcc, the source electrode of mos pipe q2 and the negative pole of diode d1 are all connected with one end of inductance l, the one of electric capacity c3
One end of end, one end of electric capacity c2 and inductance l1 is all connected with the other end of inductance l；The other end of inductance l1 and mos pipe q1's
Drain electrode is all connected with the positive pole of diode d2；The source electrode of the positive pole of diode d1, the other end of electric capacity c3 and mos pipe q1 all connects
Ground；The grid of the grid of mos pipe q1 and mos pipe q2 is all connected with a modulated signal output end.Inductance l1 is energy conversion module.Electricity
Sense l and electric capacity c3 composition low pass filter.
It is that buck reduction voltage circuit is transformed in the present embodiment, its operation principle is:
Form buck switching power circuit by q2, d1, l, c3 to be transformed, with loading the modulating wave pair of audio frequency source signal
Buck switch device is driven, and the leading edge portion of audio frequency source signal can get the quick sound of output filter capacitor
Should, trailing edge part is affected it is impossible to realize sound at load resistance end by the rc time constant of output filter capacitor and load resistance
The complete reproduction of frequency source signal.Increase now and the energy regenerating that boost topological structure Switching Power Supply is constituted is formed by l1, q1, d2
Circuit reclaims the discharge current of output filter capacitor c2 to power supply vcc, has both achieved the energy to filter capacitor c2 discharge charge
Amount reclaims, and makes the trailing edge part of audio frequency source signal completely present in output loading again.
The specific workflow transforming circuit for the present embodiment is:
1. transformation circuit first step work equivalent circuit diagram, referring to Fig. 3, when modulated signal drives in buck Switching Power Supply
When high level makes mos pipe q2 conducting, do not consider the conduction voltage drop of mos pipe q2, energy storage inductor l electric current linearly rises,
During mos q2 conducting, inductance l forward direction weber is: vin*ton=(vin-vo) * ts.
2. transformation circuit second step work equivalent circuit diagram, referring to Fig. 4, when modulated signal drives in buck Switching Power Supply
When low level, q2 mos pipe ends, and inductance l electric current can not be mutated, and forms d1 loop through fly-wheel diode, negative to output
Carry power supply filter capacitor c9 is charged, now inductive current declines, during the cut-off of q2 mos pipe, inductance l reverse weber is: vo*toff
=vo*(ts-ton).According to inductance l voltage-second balance, formula: (vin-vo) * ton=vo*(ts-ton can be obtained).Thus can obtain
Arrive: vo=vin*d.
According to ts=ton+ toff, vo=vin*d, vo are output voltage, and vin is input voltage, and d is dutycycle, because
The pressure drop that this ignores on mos pipe q1 and load resistance is not-time, and filter capacitor c2 both end voltage is vo=vin*d.
3. transformation circuit the 3rd step work equivalent circuit diagram, referring to Fig. 5, in the energy of boost Topology Switch power supply composition
In recovery circuit when mos pipe q2 cut-off, mos pipe q1 conducting, filter capacitor c2 discharges to inductance l1.Fully charged filter capacitor
C2 may act as energy recovering circuit power supply, and filter capacitor c2 both end voltage is equivalent to the input voltage of energy recovering circuit.
When modulated pulse signal drives high level to make mos pipe q1 conducting, do not consider the conducting pressure of mos pipe q1
Fall, inductance l1 electric current linearly rises, and during mos pipe q1 conducting, inductance l1 forward direction weber is: vin*ton=(vin-vo) * ts.
4. transformation circuit the 4th step work equivalent circuit diagram, referring to Fig. 6, in the energy of boost Topology Switch power supply composition
In recovery circuit when pulsed high-frequency modulated signal is low level, mos pipe q1 ends, and inductance l1 electric current can not be mutated, warp
Cross fly-wheel diode d2 and form loop, the discharge charge that circuit collects filter capacitor c2 feeds back to power supply, now inductance l1 electric current
Decline, during mos pipe q1 cut-off, inductance reverse weber is: (vo-vin) (ts-ton),
According to inductance l1 voltage-second balance, formula: (vo-vin) * toff=vin*ton can be obtained,
Thus can get: vo=vin/ (1-d)；According to ts=ton+ toff, vo=vin/ (1-d), vo are output voltage,
Vin is input voltage, and d is dutycycle.
Filter capacitor c3 discharge current, eventually passes through inductance l1 and diode d2 and returns to main power source, that is, direct current
The energy recovering circuit of vcc, boost Topology Switch power supply composition is thus the energy to realize filter capacitor c2 electric capacity is discharged returns
Receive, make the trailing edge of sound signal partially complete present, thus Switching Power Supply is transformed into digital power amplifier again.
Embodiment two:
The present embodiment is with the difference of embodiment one, and buck reduction voltage circuit and boost booster circuit share energy storage inductor,
Thus saving an inductance, reduce whole amplifying device cost, referring to Fig. 7, this buck reduction voltage circuit include mos pipe q2, two
Pole pipe d1, inductance l and electric capacity c2, described boost booster circuit includes mos pipe q1 and diode d2；The leakage of described mso pipe q2
One end of pole, the negative pole of diode d2 and electric capacity c1 is all connected with direct current vcc, and the source electrode of mos pipe q2 and diode d1's is negative
Extremely all it is connected with one end of inductance l, one end of electric capacity c3, one end of electric capacity c2 are all connected with the other end of inductance l；Mos pipe q1
Drain electrode be connected with the positive pole of diode d2；The source electrode of the positive pole of diode d1, the other end of electric capacity c3 and mos pipe q1 all connects
Ground；The grid of the grid of mos pipe q1 and mos pipe q2 is all connected with modulated signal output end out, and the drain electrode of mos pipe q1 is also connected with
One end of inductance l.
Embodiment three:
Referring to Fig. 8, switching power circuit is buck-boost converter to the present embodiment, this buck-boost converter by
Buck reduction voltage circuit and boost booster circuit are in series, and this buck reduction voltage circuit and boost booster circuit are total to same opening
Guan Guan.This buck-boost converter includes inductance l, mos pipe q2, diode d1 and electric capacity c3, described energy recovering circuit bag
Include inductance l1, mos pipe q1 and diode d2；One end of one end of inductance l and inductance l1 is all connected with direct current vcc, inductance l's
The drain electrode of the other end and mos pipe q2 is all connected with the positive pole of diode d1, the negative pole of diode d1, one end of electric capacity c3 and mos
The drain electrode of pipe q1 is all connected with one end of electric capacity c2, the source electrode of mos pipe q1, the other end all with inductance l1 for the negative pole of diode d2
Connect；The positive pole at the ancestral home, the other end of electric capacity c3 and diode d2 of mos pipe q2 is all grounded；The grid of mos pipe q1 and mos pipe
The grid of q2 is all connected with modulated signal output end out.The principle of the present embodiment and adaptation step can refer to embodiment one.This reality
Applying example is to transform boost booster circuit as digital power amplifier.
Example IV:
Referring to Fig. 9, switching power circuit is similarly buck-boost converter to the present embodiment, and it includes inductance l, mos pipe
Q2, diode d1 and electric capacity c3, described energy recovering circuit includes inductance l1, mos pipe q1 and diode d2；Described mos pipe q2
Drain electrode and the negative pole of diode d2 be all connected with direct current vcc, the source electrode of mos pipe q2 and one end of inductance l are all and diode
The negative pole of d1 connects, and the drain electrode of the positive pole of diode d1, one end of electric capacity c3 and mos pipe q1 is all connected with one end of electric capacity c2,
The source electrode of mos pipe q1, one end of inductance l1 are all connected with the positive pole of diode d2, the other end of inductance l, the other end of inductance l1
All it is grounded with the other end of electric capacity c3；The grid of the grid of mos pipe q1 and mos pipe q2 is all connected with a modulated signal output end.With
Sample, the principle of the present embodiment and adaptation step can refer to embodiment one.The present embodiment is based on buck-boost Power supply alteration
For digital power amplifier.
Embodiment five:
Referring to Figure 10, the switching power circuit of the present embodiment is semi-bridge type isolating switch power circuit, and this semi-bridge type is isolated
The input of switching power circuit connects adjustment signal output part, and the output end of semi-bridge type isolating switch power circuit connects energy
Recovery circuit.Modulated signal output end comes from audio source signal circuit.The present embodiment also includes audio source signal circuit, described
Switching power circuit include control chip u1, transformer t1, transformer t2, mos pipe q1, mos pipe q2, mos pipe q3, inductance l1,
Diode d1 to d5, electric capacity c3 and electric capacity c4；
One end of the primary coil of first output end 14 of described control chip u1 and transformer t1 is all with diode d1's
Positive pole connects, and the other end of second output end 11 of control chip u1 and the primary coil of transformer t1 is all with diode d2 just
Pole connects, and the negative pole of the negative pole of diode d1 and diode d2 is all connected with the grid of mos pipe q3；First level of transformer t1
One end of coil connects the grid of mos pipe q1, the other end of the first secondary coil of transformer t1, the source electrode of mos pipe q1 and mos
The drain electrode of pipe q2 is all connected with one end of the primary coil of transformer t2；One end of the second subprime coil of transformer t1 connects
The grid of mos pipe q2, the source grounding of the other end of second subprime coil of transformer t1 and mos pipe q2；The leakage of mos pipe q1
One end of pole and electric capacity c1 all meets direct current vcc；The other end of electric capacity c1, the primary coil of transformer t2 the other end all with electricity
The one end holding c3 connects, the other end ground connection of electric capacity c3；One end of first secondary coil of transformer t2 connects diode d3's
Positive pole, one end of the second subprime coil of transformer t2 connects the positive pole of diode d4, first secondary coil of transformer t2
The other end of the other end and second subprime coil is all grounded, and the negative pole of diode d3, the negative pole of diode d4, diode d5 are just
One end of pole and inductance l1 is all connected with the drain electrode of mos pipe q3, one end of the other end of inductance l1 and electric capacity c4 all with electric capacity c2
One end connect, the source electrode of mos pipe q3 and the other end of electric capacity c4 are all grounded；The negative pole of diode d5 connects energy regenerating electricity
Road；One end of audio source signal circuit connects the other end of inductance l1, and the other end connects the capacitor start end 8 of control chip u1.
In the present embodiment, the model of control chip u1 is preferably sg3525a.Use to control chip u1 is existing skill
Art, has the chip to this model to be discussed in detail in Baidu library.Its first output end 14 and the second output end 11 are that two-way is complementary
Output end, capacitor start end is soft start capacitor incoming end.
The present embodiment is actually the transformation to isolating switch power, is transformed into number taking semi-bridge type isolating switch power as a example
Word power amplifier.Audio source signal circuit is the computing ic1a in Figure 10, resistance r24, resistance r25, resistance 26, electric capacity c20 and audio frequency
Source forms, and annexation is referring specifically to accompanying drawing 10.
Audio frequency source signal is modulated on periodic high-frequency carrier signal, carries out pulsewidth modulation.T1 is transformer, primary
Coil and secondary coil phase mutual magnetic coupling, the high-frequency signal through audio source signal modulation, through logic circuit, forms complementary height
Frequency modulation supplies t1 transformer, coupled on secondary circuit.Mos pipe q1 is open-minded, and mos pipe q2 turns off, now
The voltage added by primary coil two ends of transformer t2 is the half of principal voltage, and energy is transmitted from primary to secondary side simultaneously.mos
Pipe q1 turns off, and mos pipe q2 turns off, and circuit is in Dead Time, and now two windings of transformer secondary output are due to commutation diode two
The afterflow simultaneously of individual pipe and be in short-circuit condition.Now energy recovery module below is by work.Mos pipe q1 disconnects, mos pipe q2
Open-minded.Now the voltage added by transformer t2 primary coil two ends is the half of principal voltage, and energy is passed from primary to secondary simultaneously
Pass.Secondary two diodes complete the change of current.
Isolating switch power is with mos pipe q1 and mos pipe q2 due to the point of contact current potential of two electric capacity c1 and electric capacity c3
Conducting situation and float, so can each transistor switch of autobalance volt-seconds value.When having in mos pipe q1 and mos pipe q2
One pipe occurs turning off time delay, arises that unbalanced drive waveform.Unbalanced drive waveform can occur bias phenomenon, this
Plant result and occur that reduction conversion efficiency more seriously makes transistor burn and aircraft bombing.General solution is primary in transformer t2
One electric capacity of string, unbalanced volt-seconds value is filtered off, reaches demagnetization purpose.
Converted according to magnetic flux, modulated pulse signal is coupled to secondary by primary by transformer t2, the primary of transformer and time
Level coil height coupling, electric current two-way flow, thus realize bidirectional energy circulation.
The rectification circuit of transformer t2 secondary coil circuit is that have to separate diode (Schottky diode or soon recovery two
Pole pipe) composition is it is ensured that electric current only flows out it is ensured that whole from the two ends of the secondary coil of transformer t2 to the positive of circuit output end
Have electric current flowing in individual circulation, no matter and diode will be positive pulse or negative pulse is all converted to positive pulse, result is time
In level circuit, carrier frequency doubles.
Amplitude signal after over commutation, doubling frequency filters loading frequency through lc low pass filter and is amplified
Audio source signal waveform, charges to filter capacitor c2 in the DC pulse being formed after diode d3 and diode d4 ballast.
And work as mos pipe q1 and turn off, mos pipe q2 turns off, and diode d1 and diode d2 value are low level, through logic electricity
Road drives mos pipe q3 conducting, and filter capacitor c2 serves as power supply and discharges to inductance l1, is formed by the electric current stream of electric capacity c2 to inductance l1
To, when mos pipe q3 disconnects, inductance l1 electric current can not be mutated, and through fly-wheel diode d5, the discharge charge of electric capacity c2 is passed to energy
Amount recovery circuit reclaims to main power source, i.e. direct current vcc.
From insulating power supply transformation digital power amplifier, the secondary circuit of transformer t2 can be equivalent to a buck with isolation
Topology Switch power supply, is equal to three big basis Switching Power Supply transformation digital power amplifiers, the leading edge portion of audio frequency source signal obtains soon
Speed response is charged to filter capacitor c2 electric capacity, and trailing edge part is subject to the rc time constant shadow of output filter capacitor and load resistance
Ring it would be desirable to be able to amount recycling module discharges to filter capacitor c2 electric capacity and returns to main power source, just can achieve filter capacitor c2
Electric capacity discharge energy reclaims, and is that the sloping portion of sound signal completely presents, thus realizing the whole waveform of audio signal in load
Ohmically circulation, and then Switching Power Supply is converted into digital power amplifier.
Half-bridge isolating switch power is transformed in the circuit of digital power amplifier and forms feedback circuit by resistance as medium, will be from
Lc low-frequency filter end filters the audio source sample of signal that carrier restoring amplifies out, feeds back to modulation module, thus reducing electricity
Road entirety distortion and the whole machine balancing of correcting circuit.
In this embodiment, through number is transformed to three big foundation class dc/dc Switching Power Supplies and isolating switch power
The circuit analysis of word power amplifier, after transformation, circuit solves conventional digital power amplifier switch power supply and two independent frequencies of digital power amplifier
Electromagnetic radiation, directly transform switching power circuit as digital power amplifier so that integrated circuit reliability improves, Electro Magnetic Compatibility
Improve.
Certainly, the utility model is created and is not limited to above-mentioned three big foundation class dc/dc Switching Power Supplies and insulating power supply
It is transformed into several specific implementation methods of digital power amplifier, those of ordinary skill in the art are without prejudice to spirit of the present utility model
Under the premise of can also make a variety of equivalent variations or replacement, these equivalent deformation and replace and all comprise lower the application patent
Within the scope of requirement comprises.It will be apparent to those skilled in the art that can technical scheme as described above and design, do
Go out other various corresponding changes and deformation, and all these changes and deformation all should belong to the utility model right
Within the protection domain requiring.
Claims (8)
1. direct-type digital power amplifier circuit is it is characterised in that including switching power circuit, energy recovering circuit energy-storage module and raising
Sound device, one end connection direct current of switching power circuit, one end connecting valve power circuit of energy-storage module, the one of energy-storage module
End connects the positive pole of loudspeaker, the minus earth of loudspeaker；Described energy recovering circuit is connected with one end of energy-storage module, and should
Energy recovering circuit is also connected with direct current；
Wherein, energy recovering circuit is used for for the discharge charge from energy-storage module feeding back to direct current.
2. direct-type digital power amplifier circuit as claimed in claim 1 is it is characterised in that described switching power circuit drops for buck
Volt circuit, described energy recovering circuit is boost booster circuit.
3. direct-type digital power amplifier circuit as claimed in claim 2 is it is characterised in that described buck reduction voltage circuit includes first
Switching tube, fly-wheel diode and low pass filter, boost booster circuit includes second switch pipe, energy conversion module and isolation
Diode；The drain electrode of first switch pipe, the negative pole of isolating diode are all connected with direct current；The source electrode of first switch pipe, afterflow two
The negative pole of pole pipe and one end of energy conversion module connection low pass filter；The drain electrode of second switch pipe, isolating diode are just
Pole connects energy conversion module；Energy-storage module connects the other end, the grid of first switch pipe and the second switch of low pass filter
The grid of pipe connects modulated signal output end.
4. direct-type digital power amplifier circuit as claimed in claim 2 is it is characterised in that described buck reduction voltage circuit includes first
Switching tube, fly-wheel diode and low pass filter, boost booster circuit includes second switch pipe and isolating diode；First opens
The negative pole of the drain electrode and isolating diode of closing pipe is all connected with direct current；The source electrode of first switch pipe, the negative pole of fly-wheel diode,
The drain electrode of two switching tubes, the positive pole of isolating diode are all connected with one end of low pass filter, and energy-storage module connects low pass filter
The other end, the grid of the grid of first switch pipe and second switch pipe connects modulated signal output end.
5. direct-type digital power amplifier circuit as claimed in claim 1 is it is characterised in that described switching power circuit is buck-
Boost converter, this buck-boost converter is in series by buck reduction voltage circuit and boost booster circuit, and this buck
Reduction voltage circuit and boost booster circuit same switching tube altogether.
6. direct-type digital power amplifier circuit as claimed in claim 5 is it is characterised in that this buck-boost converter includes electricity
Sense, switching tube, diode and electric capacity；One end of inductance is electrically connected with direct current, the other end of inductance and the drain electrode of switching tube all with
The positive pole of diode connects, and the negative pole of diode, one end of electric capacity and energy recovering circuit are all connected with one end of energy-storage module；
The source electrode of switching tube, the grid of the other end equal earthed switch pipe of electric capacity connect a modulated signal output end.
7. direct-type digital power amplifier circuit as claimed in claim 5 is it is characterised in that buck-boost converter includes electricity
Sense, switching tube, diode and electric capacity, the drain electrode of switching tube connects direct current, and one end of the source electrode of switching tube and inductance l is all with two
The negative pole of pole pipe connects, and the positive pole of diode, one end of electric capacity and energy recovering circuit are all connected with one end of energy-storage module, electricity
The other end ground connection held, the grid of switching tube connects a modulated signal output end.
8. direct-type digital power amplifier circuit as claimed in claim 1 is it is characterised in that described switching power circuit is semi-bridge type
Isolating switch power circuit, the input of this semi-bridge type isolating switch power circuit connects modulated signal output end, semi-bridge type every
Output end from switching power circuit connects energy recovering circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620895341.4U CN205911953U (en) | 2016-08-18 | 2016-08-18 | Direct type digit power amplifier circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620895341.4U CN205911953U (en) | 2016-08-18 | 2016-08-18 | Direct type digit power amplifier circuit |
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| CN205911953U true CN205911953U (en) | 2017-01-25 |
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| CN201620895341.4U Active CN205911953U (en) | 2016-08-18 | 2016-08-18 | Direct type digit power amplifier circuit |
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| CN (1) | CN205911953U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100330A (en) * | 2016-08-18 | 2016-11-09 | 广州播博科技有限公司 | Direct-type digital power amplifier circuit |
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2016
- 2016-08-18 CN CN201620895341.4U patent/CN205911953U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100330A (en) * | 2016-08-18 | 2016-11-09 | 广州播博科技有限公司 | Direct-type digital power amplifier circuit |
| CN106100330B (en) * | 2016-08-18 | 2018-08-07 | 广州播博科技有限公司 | Direct-type digital power amplifier circuit |
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