CN202818238U - High fidelity last-stage power amplifying circuit and transistor high fidelity audio amplifier - Google Patents
High fidelity last-stage power amplifying circuit and transistor high fidelity audio amplifier Download PDFInfo
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- CN202818238U CN202818238U CN 201220389708 CN201220389708U CN202818238U CN 202818238 U CN202818238 U CN 202818238U CN 201220389708 CN201220389708 CN 201220389708 CN 201220389708 U CN201220389708 U CN 201220389708U CN 202818238 U CN202818238 U CN 202818238U
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Abstract
The utility model belongs to the technical field of transistor power amplifying audio amplifiers, and particularly discloses a high fidelity last-stage power amplifying circuit and a transistor high fidelity audio amplifier. The circuit comprises a voltage amplifying stage circuit, a dominant wave amplifying circuit, a sub-wave amplifying circuit and a negative feedback and zero center voltage control circuit. The power of the voltage amplifying stage circuit is larger than or equal to 5 watts. The dominant wave amplifying circuit is connected between an output end of the voltage amplifying stage circuit and an input end of a speaker. The sub-wave amplifying circuit is connected between an input end and an output end of the dominant wave amplifying circuit in parallel. The negative feedback and zero center voltage control circuit is connected with the output ends of the dominant wave amplifying circuit and the sub-wave amplifying circuit. According to the high fidelity last-stage power amplifying circuit and the transistor high fidelity audio amplifier, not only is instantaneous overload distortion removed, but also the effect of the speaker can be better, sound generated by the speaker is abundant, sweet-sounding and pleasant, and meanwhile electric power is saved, namely environmental protection and energy saving are achieved.
Description
Technical field
The utility model belongs to transistor power amplification sound amplifier technical field, is specifically related to main ripple mixes output with the stack of complementary wave power high-fidelity final stage power amplification circuit and transistor high-fidelity loudspeaker.
Background technology
The micropkonic final stage power amplification circuit of present transistor high-fidelity, what generally use is Darlington formula amplifying circuit.
After the transistor amplifier final stage power amplifier adopted the amplification combination of Darlington formula electric current or similar circuit, because circuit design is simple easily, the transistor sound equipment developed rapidly, has replaced vacuum tube sound equipment status, becomes the main flow of high-fidelity music center.
But its sense of hearing relative vacuum pipe sound equipment not as desirable always, and it is stiff that tonequality and tone color generally are considered to sound, and is ear-piercing and the harmonic distortion rate high, the defect such as not anti-tin.
It is as follows to study carefully its main cause: above-mentioned defect all reason in Darlington formula circuit structure in the work moment of amplifying music signal, certainly produce a kind of distortion.There has been many decades in this distortion, is called transistor sound by industry.Sound equipment industry both domestic and external generally believes that this is a kind ofly not measure with instrument, but can not escape a kind of distortion of audiences' the sense of hearing.Be considered to ear-piercing transistor third harmonic distortion, or think that the transistor sound equipment has produced the tonequality that exclusive bad harmonic effects sound equipment.
Such as Fig. 1, be the existing final stage power amplification circuit theory diagram that adopts Darlington formula circuit, it is generally less than 1 watt voltage amplifier stage circuit 1 by power, main ripple amplifying circuit 2, and 3 series connection of complementary wave amplifying circuit consist of, main ripple amplifying circuit promotes the work of complementary wave amplifying circuit as promoting level, audio frequency output is superimposed by main ripple amplifying circuit output and the output of complementary wave amplifying circuit, main ripple namely is the audio signal that reaches at first loud speaker, complementary wave namely is that relatively main ripple signal has a little time-delay to arrive the audio signal of loud speaker, allows main ripple mix with the complementary wave stack and exports loud speaker to; Its physical circuit is shown in Fig. 2 and 3, and TR1 consists of voltage amplifier stage, TR2 and TR3 and consists of main ripple amplifying circuit, TR4 and TR5 formation complementary wave amplifying stage.TR2, TR3 two pipes promote level as the weak current small-power and are responsible for main ripple amplification among the figure, and TR4, TR5 are that the large current power level of final stage is responsible for the complementary wave amplification, and the sound of main ripple and the sound of complementary wave are to export loudspeaker to parallel connection stack hybrid mode.
Studying analysis in great detail through the applicant finds: when the moment in audio frequency or music signal input, TR4 and TR5 also do not react the moment before starting, TR2 and TR3 stand in the breach as main ripple amplifying stage, because of the very little event of the available magnitude of current of two pipes, be not enough to promote the loud speaker that Low ESR needs high-amperage, caused main ripple signal moment blasting.But after the electric current of TR2, TR3 promoted TR4 and TR5 starting conducting, the complementary wave signal of great power flooded lid with the main ripple mixing of small and weak and distortion at once, and this complementary wave stack mixing phenomena makes the distortion of main ripple become at once and can seek without mark.Then confusing the sound equipment industry for many decades, this distortion is during with continuous wave test, and oscilloscope is basic to be surveyed not come, because be to transship the moment that main ripple magnitude of current deficiency causes, is not again harmonic distortion, and the harmonic distortion instrument also can't be measured.Even circuit adds that a large amount of negative feedbacks (NFB) are also of no avail.Formed the transistor sound equipment when continuous wave test, surface data is very good, distortion is very low, but the sense of hearing during music playing is undesirable, especially at the general environment (when power output is lower than 5W) of listening to, because enough can in time involve its distortion to small and weak master does not flood lid to complementary wave power fully greatly, and this distortion just allows the audience find out easily.In order to make this distortion sound that sensation is a little less, to adopt the loud speaker of inefficient (sensitivity subtract 3---6db or more than) to yield to this distortion with family.And another side, the manufactory of sound equipment again the power of sound amplifier is significantly promoted 2--4 doubly or with on adapt to this type of inefficient loud speaker, make meaningless power consumption, not environmental protection of the utmost point.In fact to confirm the existence of the distortion of this circuit, namely test the sound of its distortion, very simple, as long as the collector electrode of TR4 and TR5 in Fig. 2 or 3 is disconnected, be responsible for TR4, the TR5 power transistor of complementary wave amplification this moment and do not work, only remaining main ripple amplifying stage TR1, TR2 work just can.
To sum up, tone color and music tonequality that existing popular Darlington formula electric current amplifies the final stage power amplifier circuit are not good, and the music of audience's what is heard is take powerful complementary wave as main, the sound that has but mixed weak current and formed with the main ripple of instantaneous overload distortion.
The utility model content
In order to address the above problem, the purpose of this utility model is to provide a kind of high-fidelity final stage power amplification circuit and the transistor high-fidelity loudspeaker that can eliminate the distortion of main ripple output instantaneous overload.
In order to realize above-mentioned utility model the first goal of the invention, the technical solution adopted in the utility model is as follows:
A kind of high-fidelity final stage power amplification circuit, be used for the power amplification of loud speaker, this circuit comprises voltage amplifier stage circuit, main ripple amplifying circuit, complementary wave amplifying circuit and negative feedback and zero mid-point voltage control circuit, and the power of described voltage amplifier stage circuit is more than or equal to 5 watts; Described main ripple amplifying circuit is connected between the input of described voltage amplifier stage circuit output end and loud speaker; Described complementary wave amplifying circuit is connected in parallel on the input and output side of described main ripple amplifying circuit; Described negative feedback and zero mid-point voltage control circuit are connected to described main ripple amplifying circuit and complementary wave amplification circuit output end.
Further, the power of described main ripple amplifying circuit and complementary wave amplifying circuit equates.
Further, described voltage amplifier stage circuit comprises a NPN triode (TR1), a static circuit adjusting and temperature-compensation circuit and a constant-current source;
The base stage of a described NPN triode (TR1) is connected electrically in the audio signal input end positive pole, the emitter of a described NPN triode (TR1) is electrically connected to the audio signal input end negative pole, and the collector electrode of a described NPN triode (TR1) is connected serially to positive pole with a direct current voltage source by described static circuit adjusting and temperature-compensation circuit and described constant-current source.
Further, described main ripple amplifying circuit comprises the 2nd NPN triode (TR2), the 3rd PNP triode (TR3), the 4th NPN triode (TR4), the 5th PNP triode (TR5), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3) and the 4th resistance (R4);
The base stage of described the 2nd NPN triode (TR2) is connected electrically in the node between described constant-current source and the adjusting of described static circuit and the temperature-compensation circuit;
The collector electrode of described the 2nd NPN triode (TR2) is electrically connected to the positive pole of described dc voltage power supply;
The emitter of described the 2nd NPN triode (TR2) is connected serially to the emitter of the 3rd PNP triode (TR3) by the first resistance (R1), the second resistance (R2);
The base stage of described the 3rd PNP triode (TR3) is electrically connected to the collector electrode of a described NPN triode (TR1);
The collector electrode of described the 3rd PNP triode (TR3) is electrically connected to the negative pole of described dc voltage power supply;
The base stage of described the 4th NPN triode (TR4) is electrically connected to the base stage of described the 2nd NPN triode (TR2);
The collector electrode of described the 4th NPN triode (TR4) is electrically connected to the positive pole of described dc voltage power supply;
The emitter of described the 4th NPN triode (TR4) is connected serially to the emitter of the 5th PNP triode (TR5) by the 3rd resistance (R3), the 4th resistance (R4);
The base stage of described the 5th PNP triode (TR5) is electrically connected to the base stage of described the 3rd PNP triode (TR3);
The collector electrode of described the 5th PNP triode (TR5) is electrically connected to the negative pole of described dc voltage power supply;
Series connection node between series connection node between described the first resistance (R1) and the second resistance (R2) and the 3rd resistance (R3) and the 4th resistance (R4) all is electrically connected to the input of loud speaker.
Further, described main ripple amplifying circuit comprises a N MOSFET(Q1), the 2nd P MOSFET(Q2), the 3rd N MOSFET(Q3), the 4th P MOSFET(Q4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7) and the 8th resistance (R8);
A described N MOSFET(Q1) grid is connected electrically in the node between described constant-current source and the adjusting of described static circuit and the temperature-compensation circuit;
A described N MOSFET(Q1) drain electrode is electrically connected to the positive pole of described dc voltage power supply;
A described N MOSFET(Q1) source electrode is connected serially to the 2nd PMOSFET(Q2 by the 5th resistance (R5), the 6th resistance (R6)) source electrode;
Described the 2nd P MOSFET(Q2) grid is electrically connected to the collector electrode of a described NPN triode (TR1);
Described the 2nd P MOSFET(Q2) drain electrode is electrically connected to the negative pole of described dc voltage power supply;
Described the 3rd N MOSFET(Q3) grid is electrically connected to a described N MOSFET(Q1) grid;
Described the 3rd N MOSFET(Q3) drain electrode is electrically connected to the positive pole of described dc voltage power supply;
Described the 3rd N MOSFET(Q3) source electrode is connected serially to the 4th PMOSFET(Q4 by the 7th resistance (R7), the 8th resistance (R8)) source electrode;
Described the 4th P MOSFET(Q4) grid is electrically connected to described the 2nd P MOSFET(Q2) grid;
Described the 4th P MOSFET(Q4) drain electrode is electrically connected to the negative pole of described dc voltage power supply;
Series connection node between series connection node between described the 5th resistance (R5) and the 6th resistance (R6) and the 7th resistance (R7) and the 8th resistance (R8) all is electrically connected to the input of loud speaker.
Further, described complementary wave amplifying circuit comprises the 6th NPN triode (TR6), the 7th PNP triode (TR7), the 8th PNP triode (TR8), the 9th NPN triode (TR9), the tenth PNP triode (TR10), the 11 NPN triode (TR11), the 9th to 17 resistance (R9-17) and a complementary wave quiescent current regulating circuit;
The base stage of described the 6th NPN triode (TR6) is electrically connected to the base stage of the 2nd NPN triode (TR2);
The collector electrode of described the 6th NPN triode (TR6) is electrically connected to the positive pole of described dc voltage power supply by the 12 resistance (R12);
The emitter of described the 6th NPN triode (TR6) is electrically connected to power supply ground by the 9th resistance (R9) and the 14 resistance (R14);
The base stage of described the 7th PNP triode (TR7) is electrically connected to the base stage of the 3rd PNP triode (TR3);
The emitter of described the 7th PNP triode (TR7) is electrically connected to power supply ground by the tenth resistance (R10) and the 11 resistance (R11);
The collector electrode of described the 7th PNP triode (TR7) is electrically connected to the negative pole of described dc voltage power supply by the 13 resistance (R13);
Described complementary wave quiescent current regulating circuit is connected between the collector electrode of the collector electrode of described the 6th NPN triode (TR6) and described the 7th PNP triode (TR7);
The base stage of described the 8th PNP triode (TR8) is electrically connected to the collector electrode of described the 6th NPN triode (TR6);
The emitter of described the 8th PNP triode (TR8) is electrically connected to the positive pole of described dc voltage power supply by the 14 resistance (R14);
The collector electrode of described the 8th PNP triode (TR8) is electrically connected to the input of loud speaker;
The base stage of described the 9th NPN triode (TR9) is electrically connected to the collector electrode of described the 7th PNP triode (TR7);
The collector electrode of described the 9th NPN triode (TR9) is electrically connected to the collector electrode of described the 8th PNP triode (TR8);
The emitter of described the 9th NPN triode (TR9) is electrically connected to the negative pole of described direct voltage voltage by the 15 resistance (R15);
The base stage of described the tenth PNP triode (TR10) is electrically connected to the base stage of described the 8th PNP triode (TR8);
The emitter of described the tenth PNP triode (TR10) is electrically connected to the positive pole of described dc voltage power supply by the 16 resistance (R16);
The collector electrode of described the tenth PNP triode (TR10) is electrically connected to the input of loud speaker;
The base stage of described the 11 NPN triode (TR11) is electrically connected to the base stage of described the 9th NPN triode (TR9);
The collector electrode of described the 11 NPN triode (TR11) is electrically connected to the input of loud speaker;
Described the 11 NPN triode (TR11) emitter is electrically connected to the negative pole of described direct voltage voltage by the 17 resistance (R17).
Further, the resistance of described the 9th resistance (R9) and the tenth resistance (R10) is greater than the resistance (R1-R8) of the first to eight resistance.
Further, at described the 8th PNP triode (TR8) also and be connected to a plurality of PNP triodes, the positive pole that the base stage of each PNP triode is electrically connected, collector electrode is electrically connected, emitter is electrically connected to dc voltage power supply by a resistance;
At described the 9th NPN triode (TR9) also and be connected to a plurality of NPN triodes, the negative pole that the base stage of each NPN triode is electrically connected, collector electrode is electrically connected, emitter is electrically connected to dc voltage power supply by a resistance.
The utility model also provides a kind of transistor high-fidelity loudspeaker that comprises above-mentioned high-fidelity final stage power amplification circuit.
The utility model directly adopts the high-power voltage amplifier circuit more than 5 watts directly to promote to be responsible for the power amplifier tube output that main wave power amplifies, and just can reach 20-100 watt or above power output, and then eliminates the distortion of main ripple output instantaneous overload.Although main ripple does not have the transistor sound of instantaneous overload distortion, but the general electrodynamic loudspeaker shoo of the motive force of depending merely on main ripple sense of hearing is still thiner, efficient reaches and dynamically fails to bring into play fully, for efficient and the unique tonequality that has more Novel sound box and the outstanding tamber effect that promotes and bring into play loud speaker, the utility model has purpose to increase by one group of complementary wave power amplification grade circuit as helping strength with the output of main ripple with the optimization of stack hybrid mode in parallel, to promote the instantaneous power of music, more favourable large dynamically music software playback.
Therefore, the utility model has not only been eliminated the instantaneous overload distortion, and can make the usefulness of loud speaker outstanding, and its sound that sends enriches melodized more; The consumption of more saving electric power simultaneously namely is more environmental protection and energy saving.
Description of drawings
The picture that this description of drawings provides is used for auxiliary to further understanding of the present utility model, consists of the application's a part, does not consist of to improper restriction of the present utility model, in the accompanying drawings:
Fig. 1 is the theory structure block diagram of existing high-fidelity final stage power amplification circuit;
Fig. 2 is existing Darlington formula amplification circuit structure schematic diagram;
Fig. 3 is existing Darlington formula amplifying circuit class formation schematic diagram;
Fig. 4 is the theory structure block diagram of the utility model high-fidelity final stage power amplification circuit;
Fig. 5 is a kind of main ripple amplification circuit structure schematic diagram of the present utility model;
Fig. 6 is the main ripple amplification circuit structure of another kind of the present utility model schematic diagram;
Fig. 7 is a kind of complementary wave amplification circuit structure schematic diagram of the present utility model;
Fig. 8 is another kind of complementary wave amplification circuit structure schematic diagram of the present utility model.
Embodiment
As shown in Figure 4, present embodiment discloses a kind of high-fidelity final stage power amplification circuit, this circuit comprises voltage amplifier stage circuit 1, main ripple amplifying circuit 2, complementary wave amplifying circuit 3, and negative feedback and zero mid-point voltage control circuit 4, the power of voltage amplifier stage circuit 1 is more than or equal to 5 watts, main ripple amplifies electricity, 2 are connected between the input of voltage amplifier stage circuit 1 output and loud speaker 5, complementary wave amplifies electricity, 6 are connected in parallel on the input and output side of main ripple amplifying circuit 2, negative feedback and zero mid-point voltage control electricity, 4 are connected to main ripple amplifying circuit 2 and complementary wave amplifying circuit 3 outputs.
Wherein, the power of main ripple amplifying circuit 2 and complementary wave amplifying circuit 2 equates, when main ripple is 1 to 1 with complementary wave power, its instantaneous power has quite increased by one times, the audio signal that mixes rests on the time of peak value and also should calculate with x2, two groups independently output audio mix, music has just listened fork-like farm tool used in ancient China that slight hangover is arranged, tone color is abundanter and melodized.
As illustrated in Figures 5 and 6, voltage amplifier stage circuit 1 comprises a NPN triode TR1, static circuit adjusting and temperature-compensation circuit and constant-current source; Wherein, the base stage of the one NPN triode TR1 is connected electrically in the audio signal input end positive pole, the emitter of the one NPN triode TR1 is electrically connected to the audio signal input end negative pole, and the collector electrode of a NPN triode TR1 is connected serially to positive pole with a direct current voltage source by described static circuit adjusting and temperature-compensation circuit and described constant-current source.
Be illustrated in figure 5 as a kind of main ripple amplification circuit structure schematic diagram of the present utility model, main ripple amplifying circuit 2 comprises the 2nd NPN triode TR2, the 3rd PNP triode TR3, the 4th NPN triode TR4, the 5th PNP triode TR5, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and the 4th resistance (R4); Wherein, the base stage of the 2nd NPN triode TR2 is connected electrically in the node between described constant-current source and the adjusting of described static circuit and the temperature-compensation circuit, the collector electrode of the 2nd NPN triode TR2 is electrically connected to the positive pole of described dc voltage power supply, and the emitter of the 2nd NPN triode TR2 is connected serially to the emitter of the 3rd PNP triode TR3 by the first resistance R 1, the second resistance R 2; Wherein, the base stage of the 3rd PNP triode TR3 is electrically connected to the collector electrode of a NPN triode TR1, and the collector electrode of the 3rd PNP triode TR3 is electrically connected to the negative pole of described dc voltage power supply; Wherein, the base stage of the 4th NPN triode TR4 is electrically connected to the base stage of the 2nd NPN triode TR2, the collector electrode of the 4th NPN triode TR4 is electrically connected to the positive pole of described dc voltage power supply, and the emitter of the 4th NPN triode TR4 is connected serially to the emitter of the 5th PNP triode TR5 by the 3rd resistance R 3, the 4th resistance R 4; Wherein, the base stage of the 5th PNP triode TR5 is electrically connected to the base stage of described the 3rd PNP triode TR3, and the collector electrode of the 5th PNP triode TR5 is electrically connected to the negative pole of described dc voltage power supply; Wherein, the series connection node between the series connection node between the first resistance R 1 and the second resistance R 2 and the 3rd resistance R 3 and the 4th resistance R 4 all is electrically connected to the input of loud speaker.
Be illustrated in figure 6 as the main ripple amplification circuit structure of another kind of the present utility model schematic diagram, only be to have changed the 2nd NPN triode TR2, the 3rd PNP triode TR3, the 4th NPN triode TR4, the 5th PNP triode TR5 into four MOSFET with the difference of Fig. 5.As shown in the figure, this main ripple amplifying circuit 2 is drawn together a N MOSFET Q1, the 2nd P MOSFETQ2, the 3rd N MOSFET Q3, the 4th P MOSFET Q4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and the 8th resistance R 8; Wherein, the grid of the one N MOSFET Q1 is connected electrically in the node between described constant-current source and the adjusting of described static circuit and the temperature-compensation circuit, the drain electrode of the one N MOSFET Q1 is electrically connected to the positive pole of described dc voltage power supply, and the source electrode of a N MOSFET Q1 is connected serially to the source electrode of the 2nd P MOSFET Q2 by the 5th resistance R 5, the 6th resistance R 6; Wherein, the grid of the 2nd P MOSFET Q2 is electrically connected to the collector electrode of a described NPN triode TR1, and the drain electrode of the 2nd PMOSFET Q2 is electrically connected to the negative pole of described dc voltage power supply; Wherein, the grid of the 3rd NMOSFET Q3 is electrically connected to the grid of a described N MOSFET Q1, the drain electrode of the 3rd N MOSFET Q3 is electrically connected to the positive pole of described dc voltage power supply, and the source electrode of the 3rd N MOSFET Q3 is connected serially to the source electrode of the 4th PMOSFET Q4 by the 7th resistance R 7, the 8th resistance R 8; Wherein, the grid of the 4th P MOSFET Q4 is electrically connected to the grid of described the 2nd P MOSFET Q2, and the drain electrode of the 4th P MOSFET Q4 is electrically connected to the negative pole of described dc voltage power supply; Wherein, the series connection node between the series connection node between the 5th resistance R 5 and the 6th resistance R 6 and the 7th resistance R 7 and the 8th resistance R 8 all is electrically connected to the input of loud speaker.
Be a kind of complementary wave amplifying circuit of the present utility model such as Fig. 7, complementary wave amplifying circuit 3 comprises the 6th NPN triode TR6, the 7th PNP triode TR7, the 8th PNP triode TR8, the 9th NPN triode TR9, the tenth PNP triode TR10, the 11 NPN triode TR11, the 9th to 17 resistance R 9-17 and a complementary wave quiescent current regulating circuit; Wherein, the base stage of the 6th NPN triode TR6 is electrically connected to the base stage (that is to say the X node among the figure) of the 2nd NPN triode TR2, the collector electrode of the 6th NPN triode TR6 is electrically connected to the positive pole of described dc voltage power supply by the 12 resistance R 12, and the emitter of the 6th NPN triode TR6 is electrically connected to power supply ground by the 9th resistance R 9 and the 14 resistance R 14; Wherein, the base stage of the 7th PNP triode TR7 is electrically connected to the base stage (that is to say the Y node among the figure) of the 3rd PNP triode TR3, the emitter of the 7th PNP triode TR7 is electrically connected to power supply ground by the tenth resistance R 10 and the 11 resistance R 11, and the collector electrode of the 7th PNP triode TR7 is electrically connected to the negative pole of described dc voltage power supply by the 13 resistance R 13; Wherein, complementary wave quiescent current regulating circuit is connected between the collector electrode of the collector electrode of described the 6th NPN triode TR6 and described the 7th PNP triode TR7; Wherein, the base stage of the 8th PNP triode TR8 is electrically connected to the collector electrode of described the 6th NPN triode TR6, the emitter of the 8th PNP triode TR8 is electrically connected to the positive pole of described dc voltage power supply by the 14 resistance R 14, and the collector electrode of the 8th PNP triode TR8 is electrically connected to the input of loud speaker; Wherein, the base stage of the 9th NPN triode TR9 is electrically connected to the collector electrode of described the 7th PNP triode TR7, the collector electrode of the 9th NPN triode TR9 is electrically connected to the collector electrode of described the 8th PNP triode TR8, and the emitter of the 9th NPN triode TR9 is electrically connected to the negative pole of described direct voltage voltage by the 15 resistance R 15; Wherein, the base stage of the tenth PNP triode TR10 is electrically connected to the base stage of described the 8th PNP triode TR8, the emitter of the tenth PNP triode TR10 is electrically connected to the positive pole of described dc voltage power supply by the 16 resistance R 16, and the collector electrode of the tenth PNP triode TR10 is electrically connected to the input of loud speaker; Wherein, the base stage of the 11 NPN triode TR11 is electrically connected to the base stage of described the 9th NPN triode TR9, the collector electrode of the 11 NPN triode TR11 is electrically connected to the input of loud speaker, and the 11 NPN triode TR11 emitter is electrically connected to the negative pole of described direct voltage voltage by the 17 resistance R 17.
Wherein, the resistance of the 9th resistance R 9 and the tenth resistance R 10 is greater than the resistance R1-R8 of the first to eight resistance.
As shown in Figure 8, at the 8th PNP triode TR8 also and be connected to a plurality of PNP triodes (TR12/14, ,), the positive pole that the base stage of each PNP triode is electrically connected, collector electrode is electrically connected, emitter is electrically connected to dc voltage power supply by a resistance; At the 9th NPN triode TR9 also and be connected to a plurality of NPN triodes (TR13/15, ,), the negative pole that the base stage of each NPN triode is electrically connected, collector electrode is electrically connected, emitter is electrically connected to dc voltage power supply by a resistance.
The utility model also provides a kind of transistor high-fidelity loudspeaker that comprises above-mentioned high-fidelity final stage power amplification circuit.
As illustrated in Figures 5 and 6, the utility model is responsible for the current amplification circuit that circuit that main wave power amplifies does not re-use Darlington formula or similar effect, changes by power to reach 5w or above high-power Class A voltage amplifier circuit, directly promotes to be responsible for a pair of or one group the transistor T R of main wave power amplification or the power amplifier tube of insulation bank tube Mosfet is exported, with TR2,3,4,5/Q1,2,3,4 power tube combination is amplified as main wave power, just can reach 20--100 watt or above power output.
Although main ripple does not have the transistor sound of instantaneous overload distortion, depend merely on the motive force of main ripple, general electrodynamic loudspeaker shoo sense of hearing is still thiner, and efficient reaches and dynamically fails to bring into play fully.For efficient and the unique tonequality that has more Novel sound box and the outstanding tamber effect that promotes and bring into play loud speaker, the utility model increases by one group of complementary wave power amplification grade circuit, as helping strength with the output of main ripple with the optimization of stack hybrid mode in parallel, and there is purpose to promote the instantaneous power of music, more favourable large dynamically music software playback.
Shown in Fig. 7 and 8, promote level with TR6, TR7 as the complementary wave power amplifier among the figure, .R9/10 the resistance R1-R8 of resistance value ratio first to eight resistance of resistance is high, for avoiding bringing out instantaneous overload at the corresponding levels, avoid again mixing with the output audio of main ripple and complementary wave, produce bad tonequality consequence, R11 does not connect mid point loud speaker output and directly lands.Such circuit arrangement make TR6, TR7 the input audio signal starting voltage just a little higher than TR2 that is responsible for main wave power or TR2/4,,, power tube combination and TR3 or TR3/5,,, the power tube combination.And slightly high starting voltage, form the corresponding starting current time that slightly falls behind main ripple, because of main ripple electric current fully by TR2, the combination of TR3 power amplifier is responsible for, promote level moment distortion so no longer cause this complementary wave, after the electric current starting at the corresponding levels, promote again next stage, be responsible for large electric current, powerful complementary wave power amplification group TR8 or TR8/10/12, power tube combination and TR9 or TR9/11/13, the power tube combination, because TR8, the combination starting current of TR9 also needs some time, and the output that this result forms the more main ripple of output current time of complementary wave has a larger lead time, and main ripple and complementary wave just consist of successively sounding superposition phenomenon in parallel of two audio frequency.
Relatively and Fig. 5 and Fig. 6, Fig. 7 and Fig. 8 be at the instantaneous sound that sent twice, and with the overlapping sound of high-speed and continuous, and in fact the audience can only hear sound, and when main ripple was 1 to 1 with complementary wave power, its instantaneous power had quite increased by one times.The audio signal that mixes rests on the time of peak value and also should calculate with x2, two groups independently output audio mix, music has just listened fork-like farm tool used in ancient China that slight hangover is arranged, tone color is abundanter and melodized.And outstanding performance to be its relatively main ripple after a while have the slight time difference and the complementary wave that slightly falls behind promotes the sticking point of loud speaker, the sound dish of loud speaker to be pushed to certain a bit (deciding with the sensitivity of loud speaker), the continuous promotion forward along its kinetic potential with main wave power.Because the rear boosting power that complementary wave is arranged helps, so sound dish kinetic potential has more strength, makes the usefulness of general dynamic speaker that outstanding performance and performance be arranged, and especially needs large motive force, the large dynamically music software of symphony and so on.
More than describe preferred embodiment of the present utility model in detail, the ordinary skill that should be appreciated that this area need not creative work and just can make many modifications and variations according to design of the present utility model.Therefore, all in the art technical staff according to the utility model design on the prior art basis by logic analysis, reasoning or according to the available technical scheme of limited experiment, all should be among the determined protection range by these claims.
Claims (9)
1. a high-fidelity final stage power amplification circuit is used for the power amplification of loud speaker, it is characterized in that:
This circuit comprises voltage amplifier stage circuit, main ripple amplifying circuit, complementary wave amplifying circuit and negative feedback and zero mid-point voltage control circuit, and the power of described voltage amplifier stage circuit is more than or equal to 5 watts;
Described main ripple amplifying circuit is connected between the input of described voltage amplifier stage circuit output end and loud speaker;
Described complementary wave amplifying circuit is connected in parallel on the input and output side of described main ripple amplifying circuit;
Described negative feedback and zero mid-point voltage control circuit are connected to described main ripple amplifying circuit and complementary wave amplification circuit output end.
2. high-fidelity final stage power amplification circuit according to claim 1 is characterized in that:
The power of described main ripple amplifying circuit and complementary wave amplifying circuit equates.
3. high-fidelity final stage power amplification circuit according to claim 1 is characterized in that:
Described voltage amplifier stage circuit comprises a NPN triode (TR1), a static circuit adjusting and temperature-compensation circuit and a constant-current source;
The base stage of a described NPN triode (TR1) is connected electrically in the audio signal input end positive pole, the emitter of a described NPN triode (TR1) is electrically connected to the audio signal input end negative pole, and the collector electrode of a described NPN triode (TR1) is connected serially to positive pole with a direct current voltage source by described static circuit adjusting and temperature-compensation circuit and described constant-current source.
4. high-fidelity final stage power amplification circuit according to claim 3 is characterized in that:
Described main ripple amplifying circuit comprises the 2nd NPN triode (TR2), the 3rd PNP triode (TR3), the 4th NPN triode (TR4), the 5th PNP triode (TR5), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3) and the 4th resistance (R4);
The base stage of described the 2nd NPN triode (TR2) is connected electrically in the node between described constant-current source and the adjusting of described static circuit and the temperature-compensation circuit;
The collector electrode of described the 2nd NPN triode (TR2) is electrically connected to the positive pole of described dc voltage power supply;
The emitter of described the 2nd NPN triode (TR2) is connected serially to the emitter of the 3rd PNP triode (TR3) by the first resistance (R1), the second resistance (R2);
The base stage of described the 3rd PNP triode (TR3) is electrically connected to the collector electrode of a described NPN triode (TR1);
The collector electrode of described the 3rd PNP triode (TR3) is electrically connected to the negative pole of described dc voltage power supply;
The base stage of described the 4th NPN triode (TR4) is electrically connected to the base stage of described the 2nd NPN triode (TR2);
The collector electrode of described the 4th NPN triode (TR4) is electrically connected to the positive pole of described dc voltage power supply;
The emitter of described the 4th NPN triode (TR4) is connected serially to the emitter of the 5th PNP triode (TR5) by the 3rd resistance (R3), the 4th resistance (R4);
The base stage of described the 5th PNP triode (TR5) is electrically connected to the base stage of described the 3rd PNP triode (TR3);
The collector electrode of described the 5th PNP triode (TR5) is electrically connected to the negative pole of described dc voltage power supply;
Series connection node between series connection node between described the first resistance (R1) and the second resistance (R2) and the 3rd resistance (R3) and the 4th resistance (R4) all is electrically connected to the input of loud speaker.
5. high-fidelity final stage power amplification circuit according to claim 3 is characterized in that:
Described main ripple amplifying circuit comprises a N MOSFET(Q1), the 2nd P MOSFET(Q2), the 3rd N MOSFET(Q3), the 4th P MOSFET(Q4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7) and the 8th resistance (R8);
A described N MOSFET(Q1) grid is connected electrically in the node between described constant-current source and the adjusting of described static circuit and the temperature-compensation circuit;
A described N MOSFET(Q1) drain electrode is electrically connected to the positive pole of described dc voltage power supply;
A described N MOSFET(Q1) source electrode is connected serially to the 2nd PMOSFET(Q2 by the 5th resistance (R5), the 6th resistance (R6)) source electrode;
Described the 2nd P MOSFET(Q2) grid is electrically connected to the collector electrode of a described NPN triode (TR1);
Described the 2nd P MOSFET(Q2) drain electrode is electrically connected to the negative pole of described dc voltage power supply;
Described the 3rd N MOSFET(Q3) grid is electrically connected to a described N MOSFET(Q1) grid;
Described the 3rd N MOSFET(Q3) drain electrode is electrically connected to the positive pole of described dc voltage power supply;
Described the 3rd N MOSFET(Q3) source electrode is connected serially to the 4th PMOSFET(Q4 by the 7th resistance (R7), the 8th resistance (R8)) source electrode;
Described the 4th P MOSFET(Q4) grid is electrically connected to described the 2nd P MOSFET(Q2) grid;
Described the 4th P MOSFET(Q4) drain electrode is electrically connected to the negative pole of described dc voltage power supply;
Series connection node between series connection node between described the 5th resistance (R5) and the 6th resistance (R6) and the 7th resistance (R7) and the 8th resistance (R8) all is electrically connected to the input of loud speaker.
6. it is characterized in that according to claim 4 or 5 described high-fidelity final stage power amplification circuits:
Described complementary wave amplifying circuit comprises the 6th NPN triode (TR6), the 7th PNP triode (TR7), the 8th PNP triode (TR8), the 9th NPN triode (TR9), the tenth PNP triode (TR10), the 11 NPN triode (TR11), the 9th to 17 resistance (R9-17) and a complementary wave quiescent current regulating circuit;
The base stage of described the 6th NPN triode (TR6) is electrically connected to the base stage of the 2nd NPN triode (TR2);
The collector electrode of described the 6th NPN triode (TR6) is electrically connected to the positive pole of described dc voltage power supply by the 12 resistance (R12);
The emitter of described the 6th NPN triode (TR6) is electrically connected to power supply ground by the 9th resistance (R9) and the 14 resistance (R14);
The base stage of described the 7th PNP triode (TR7) is electrically connected to the base stage of the 3rd PNP triode (TR3);
The emitter of described the 7th PNP triode (TR7) is electrically connected to power supply ground by the tenth resistance (R10) and the 11 resistance (R11);
The collector electrode of described the 7th PNP triode (TR7) is electrically connected to the negative pole of described dc voltage power supply by the 13 resistance (R13);
Described complementary wave quiescent current regulating circuit is connected between the collector electrode of the collector electrode of described the 6th NPN triode (TR6) and described the 7th PNP triode (TR7);
The base stage of described the 8th PNP triode (TR8) is electrically connected to the collector electrode of described the 6th NPN triode (TR6);
The emitter of described the 8th PNP triode (TR8) is electrically connected to the positive pole of described dc voltage power supply by the 14 resistance (R14);
The collector electrode of described the 8th PNP triode (TR8) is electrically connected to the input of loud speaker;
The base stage of described the 9th NPN triode (TR9) is electrically connected to the collector electrode of described the 7th PNP triode (TR7);
The collector electrode of described the 9th NPN triode (TR9) is electrically connected to the collector electrode of described the 8th PNP triode (TR8);
The emitter of described the 9th NPN triode (TR9) is electrically connected to the negative pole of described direct voltage voltage by the 15 resistance (R15);
The base stage of described the tenth PNP triode (TR10) is electrically connected to the base stage of described the 8th PNP triode (TR8);
The emitter of described the tenth PNP triode (TR10) is electrically connected to the positive pole of described dc voltage power supply by the 16 resistance (R16);
The collector electrode of described the tenth PNP triode (TR10) is electrically connected to the input of loud speaker;
The base stage of described the 11 NPN triode (TR11) is electrically connected to the base stage of described the 9th NPN triode (TR9);
The collector electrode of described the 11 NPN triode (TR11) is electrically connected to the input of loud speaker;
Described the 11 NPN triode (TR11) emitter is electrically connected to the negative pole of described direct voltage voltage by the 17 resistance (R17).
7. high-fidelity final stage power amplification circuit according to claim 6 is characterized in that:
The resistance of described the 9th resistance (R9) and the tenth resistance (R10) is greater than the resistance (R1-R8) of the first to eight resistance.
8. high-fidelity final stage power amplification circuit according to claim 6 is characterized in that:
At described the 8th PNP triode (TR8) also and be connected to a plurality of PNP triodes, the positive pole that the base stage of each PNP triode is electrically connected, collector electrode is electrically connected, emitter is electrically connected to dc voltage power supply by a resistance;
At described the 9th NPN triode (TR9) also and be connected to a plurality of NPN triodes, the negative pole that the base stage of each NPN triode is electrically connected, collector electrode is electrically connected, emitter is electrically connected to dc voltage power supply by a resistance.
9. transistor high-fidelity loudspeaker that comprises each described high-fidelity final stage power amplification circuit of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220389708 CN202818238U (en) | 2012-06-26 | 2012-08-07 | High fidelity last-stage power amplifying circuit and transistor high fidelity audio amplifier |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220303799.8 | 2012-06-26 | ||
| CN201220303799 | 2012-06-26 | ||
| CN 201220389708 CN202818238U (en) | 2012-06-26 | 2012-08-07 | High fidelity last-stage power amplifying circuit and transistor high fidelity audio amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202818238U true CN202818238U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220389708 Expired - Fee Related CN202818238U (en) | 2012-06-26 | 2012-08-07 | High fidelity last-stage power amplifying circuit and transistor high fidelity audio amplifier |
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| Country | Link |
|---|---|
| CN (1) | CN202818238U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922768A (en) * | 2021-10-14 | 2022-01-11 | 深圳市昂佳科技有限公司 | Darlington tube high-fidelity audio power amplifier |
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2012
- 2012-08-07 CN CN 201220389708 patent/CN202818238U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922768A (en) * | 2021-10-14 | 2022-01-11 | 深圳市昂佳科技有限公司 | Darlington tube high-fidelity audio power amplifier |
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Granted publication date: 20130320 Termination date: 20160807 |