CN1691836A - Power frequency divider with complete definition and fidelity - Google Patents
Power frequency divider with complete definition and fidelity Download PDFInfo
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- CN1691836A CN1691836A CN 200410026965 CN200410026965A CN1691836A CN 1691836 A CN1691836 A CN 1691836A CN 200410026965 CN200410026965 CN 200410026965 CN 200410026965 A CN200410026965 A CN 200410026965A CN 1691836 A CN1691836 A CN 1691836A
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Abstract
The invention is power frequency demultiplier for completely intelligible fidelity; it overcomes the problems of (1) phase distortion, (2) opposing electromotive force and induced electromotive force make damage to the acoustic quality and the sharpness, (3) each frequency band reasonable distributed in frequency response in current technology. Using the means that equipping circuit which is made of capacitor C<SUB>1</SUB> and resistance R<SUB>1</SUB> connected in series and bass frequency dividing circuit which is made on the base of capacitors C<SUB>2</SUB> connected in series on the input end and the common end, it realizes effects of completely intelligible distortionless, and it is provided with advantages of higher sensibility and efficiency and lower cost.
Description
Technical field
The present invention relates to the frequency divider of a kind of complete definition and undistorted speaker system.
Background technology
In sound system, speaker system is its terminal performance part, thereby is undertaking most important functions.But the speaker system of existing technical know-how, according to many laws of physics and theorem, produce number of drawbacks unavoidablely, comprise serious superfluous sound, hangover sound, pollution acoustic signal sound, bass distortion and phase distortion, and the acoustic image positions of various musical instrument sound that cause thus and voice is smudgy, bass is muddy etc.Produce the principle of these defectives, in 001142682 of the patent No. is called " specification " of " sound box frequency divider with high resolution and less distortion ", be described, see Fig. 1-6.
No. 001142682 patented technology structure is solving the lifting that has ground-breaking matter aspect speaker system definition and the high-fidelity, but still has defective at this aspect two.
One, fail to accomplish clear fully
Its meaning is meant fails thoroughly to solve inductance coil and woofer voice coil loudspeaker voice coil when work, and the formed induced current of the back electromotive force of generation and induced electromotive force is to the pollution of acoustic signal electric current.
This is because its technical pattern determines, and this is owing to its design aim, and still based on frequency division, definition and high-fidelity are to add due to the composition.
See Fig. 7, through experiment confirm repeatedly, solve the pollution problem of above-mentioned induced current to the acoustic signal electric current, what play a crucial role is by capacitor C
2With the loop that resistance R is formed, the degree of its resolution ability is by capacitor C
2Capacity (under withstand voltage identical condition, down with) size, and C
2And the some V between the R
7Current potential just determine and V
7Current potential height by the resistance size decision of resistance R.
Through experiment confirm repeatedly, induced current is to the pollution problem of acoustic signal electric current, capacitor C when desiring to think to solve said system work fully
2Electric capacity must be more than 200 microfarads, the resistance of resistance R must be more than 300 ohm.And irrelevant with the described inductance value of L2, also meet common point C with direct C point or after meeting loud speaker M more irrelevant.Standard can be weighed the technical characterictic of above-mentioned patented technology structure thus.Among Fig. 7 by capacitor C
2, what inductance L 2 resistance R and loud speaker M formed is the middle pitch loop, and the middle pitch dedicated speakers is generally 8 ohm or 4 ohm, and its dc impedance is about 6 ohm and 3 ohm respectively, by its formula C that provides
2=(10～26) * 8/r knows, the capacitor C of its permission
2Maximum is 26 * 8/3=69.3 (microfarad), far below critical value 200 microfarads, reexamine the numerical value of resistance R among Fig. 7, confirm through repeated experiments, the numerical value of resistance R is about more than 150 ohm the time, people's ear is not aware of the existence of the acoustic pressure of Squawker M, when equaling 110 ohm, can hear the faint sound that Squawker M takes place, thereby the resistance of resistance R is no more than 110 ohm, and this resistance is far below 300 ohm of critical resistances, and the too low so that people's ear of Squawker acoustic pressure is not aware of the phenomenon of its sound, voltage by each element two ends of series circuit is directly proportional with its resistance, and the identical Ohm's law of current strength infers out.In sum, the defective of its definition aspect be owing to its design aim with the frequency division be main other aspects be auxilliary attached institute extremely.
Two, still have distortion phenomenon
Its meaning is meant fails thoroughly to solve woofer in when work, the distortion phenomenon that the reaction force that induced current produced that its voice coil loudspeaker voice coil motion produces causes the inhibition of radio cone paper disc vibration.
It is identical that its principle is caught up with the argumentation of stating the definition defective, different is, the induced current that the voice coil loudspeaker voice coil motion produces during woofer work is except destroying definition, also destroy fidelity, cause distortion, its reason is the electromagnetic field of voice coil loudspeaker voice coil motion cutting self formation and the formed induced current of the magnetic line of force of permanent magnet, the direction of the power that produces is opposite with the power direction of signal code, cause paper disc vibration not in place and cause distortion, above-mentioned two defectives that cause are showing as acoustically, music background is quiet inadequately, and the Music Day is gathered not enough clarity or sharp and clear inadequately, slightly messy sense, the voice aspect, enunciating still has ambiguous sense, still lacks accurately sense remarkably true to life, and it " human interest " aspect of music still has interesting to listen to inadequately and slightly stiff sense.Though above-mentioned patented technology structure is still having room for improvement aspect definition and the fidelity, but in view of its solve aspect the electric phase distortion and frequency response in the characteristic that is mature on the whole that has aspect the rational proportion distribution of each frequency range, the performance of its matter has the lifting of matter than existing technology product.
Summary of the invention
The objective of the invention is to overcome all deficiencies of above-mentioned existing technology or new technology, provide the frequency response a kind of gamut rationally to distribute in the ratio of each frequency range from subwoofer to the superelevation sound, overcome electric phase distortion, thoroughly solve the power divider of the induced current of back electromotive force and induced electromotive force formation the complete clear fidelity of the destruction of definition and fidelity.
For realizing purpose of the present invention, the power divider of described complete clear fidelity comprises input S common port C, be attempted by the superelevation cent frequency circuit of input S and common port C, common high pitch frequency dividing circuit, imitative middle pitch frequency dividing circuit (or middle pitch frequency dividing circuit) is provided with capacitor C
2Or C
2And inductance L
2The ground bass frequency dividing circuit of serial connection, and be provided with capacitor C
1And resistance R
1The electric loop of serial connection and the bass frequency dividing circuit that is provided with inductance L.
The power divider of described complete clear fidelity, wherein said resistance R
1Resistance is greater than 5 ohm of scopes, capacitor C
1Parameter value is 5～20 * 10
5The microfarad scope.
The power divider of described complete clear fidelity, wherein said capacitor C
2Parameter value in 50-50000 microfarad scope.
Brief Description Of Drawings
The drawing of accompanying drawing is described as follows:
Fig. 1 is the divider circuit schematic diagram of two divided-frequency;
Fig. 2 is dumbbell type or the divider circuit schematic diagram that claims 2.5 frequency division audio amplifiers;
Fig. 3 is the divider circuit schematic diagram of three frequency division;
Fig. 4 is the divider circuit schematic diagram of the two bass parallel connections of three frequency division;
Fig. 5 is a passive divider circuit schematic diagram in the patent No. 982346093;
Fig. 6 is existing another kind of four-divider circuit theory diagrams;
Fig. 7 is called the sound box frequency divider with high resolution and less distortion schematic diagram for 001142682 of the patent No.;
Fig. 8 is the present invention's circuit theory diagrams.
Embodiment:
Be described in further detail below in conjunction with the enforcement of accompanying drawing the power divider of the complete clear fidelity of the present invention.
One, solved of the pollution problem of the induced current of back electromotive force and induced electromotive force formation to signal code.
As shown in Figure 8, the power divider of the complete clear fidelity of the present invention is provided with by capacitor C
1And resistance R
1The electric loop of serial connection.The experiment proved that this structure can be offset back electromotive force and induced electromotive force, the pollution of signal code is caused destroying the side effect of definition, this paper is this phenomenon tentative " negative fluxfield effect " by name.Know the intensity size and the capacitor C of negative fluxfield by experiment
1Capacitance about with capacitor C
1With resistance R
1Between some V
8Electromotive force height relevant, and some V
8Electromotive force height and resistance R
1Resistance be directly proportional thereby and R
1The resistance size relevant, work as C
1Capacitance one regularly, R
1Resistance big more, negative fluxfield intensity is big more, but works as R
1Value is greater than after 300 ohm, DeGrain, and during greater than 700 ohm, the conversion of resistance has been imperceptible difference, during less than 300 ohm, the variation of resistance, effect is obvious.
2, work as resistance R
1Resistance one regularly (must greater than 30 ohm), capacitor C
1The size of capacity be directly proportional with negative fluxfield intensity.But when the numerical value of capacitor C 1 when the resistance of resistance R 1 is greater than 300 ohm simultaneously greater than 200 microfarads (often reaching for several parallel connections), the intensity of negative magnetosonic offset enough that the inductance coil of the voice coil loudspeaker voice coil of common woofer and common frequency divider produced when work side effect---induced current is to the destruction of definition.
Two, solved the destruction problem of induced electromotive force to fidelity.
See shown in Figure 8ly, the power divider of the complete clear fidelity of the present invention is provided with by capacitor C
1And resistance R
1Capacitor C as mentioned above, is worked as in the electric loop of serial connection
1Greater than 200 microfarads (but need not too big, 250 microfarads of being everlasting are following), resistance R
1At (usually about 700 ohm) more than 300 ohm, the negative fluxfield that produces is enough offset the common woofer magnetic field that its voice coil loudspeaker voice coil cutting forms himself when work and the induced current that the magnetic line of force produced of magnetic field of permanent magnet, the formed power of this induced current, its direction is opposite with the power direction that signal code generates, thereby the positive surface vibration of obstruction paper disc, make the paper disc vibration not in place, and produce conditions of streaking, make former sound distortion.Be the sticking action of induced current, not only destroy definition but also cause distortion the paper disc vibration.
Three, solved the problem of electric property phase distortion
Want to avoid the destruction of electric property phase distortion to tone color, from the ultralow segment of superelevation sound to 200 hertz, electric phase place must be consistent.By existing passive frequency divider theory, the used inductance value of the low pass part that part-frequency point is 200 hertz is near 9 milihenries, if require the D.C. resistance of inductance coil to be no more than 3 ohm, then used copper cash needs more than 4.5 kilograms, this will significantly raise the cost, and also be the abuse to scarce resource.Aspect effect, inductance value is big more, and the back electromotive force that is produced is too big, causes sharpness problems to be difficult to solve.
Therefore need to seek new technology, to solve electric phase distortion problem.
See shown in Figure 8ly, the power divider of the complete clear fidelity of the present invention is provided with capacitor C
2Inductance L
2The ground bass frequency dividing circuit of serial connection is provided with capacitor C
1And resistance R
1The electric loop of serial connection is provided with the bass frequency dividing circuit that inductance L constitutes, about 3.0 milihenries of the parameter value of inductance L (when requiring D.C. resistance less than 0.8 ohm used copper cash less than 0.2 kilogram).Capacitor C
2About 130 microfarads of parameter value (suppose 8 ohm of used loud speakers, down with), the numerical value of electric capacity is greater than 200 microfarads, the parameter value of resistance R 1 is greater than 300 ohm.Operation principle is as follows: work as C
1Meet R
1Electric loop when disconnecting because about 3.0 milihenries of the inductance L of bass frequency dividing circuit, so to the bass frequency range below 900 hertz, the low more induction reactance of frequency is more little, voice-frequency signalling current leads directly to, and sees by capacitor C again
2And inductance L
2The ground bass frequency dividing circuit that constitutes is because C
2About 130 microfarads of parameter value, so the low-frequency range more than 150 hertz is straight-through, do not had capacitive reactance to 200 hertz of places.Through experiment confirm, the height of the acoustic pressure of Chuan Jie loud speaker and capacitor C thereafter
2Internal resistance be inversely proportional to, when using the less polyester electric capacity (being generally homemade mill run) of internal resistance, bass frequency range at (to 900 hertz) more than 200 hertz, it is above-mentioned that both are equal substantially, audible representation is the very low stereovision again of the acoustic pressure confusion of ground bass, when using the capacitor of high-quality more, acoustic pressure does not have significant change
Hence one can see that, C
1When the electric loop that is connected in series with R1 was disallowable, electric phase problem can not solve, and the present is seen C again
1With R
1The loop of serial connection and the above-mentioned relevance of two frequency dividing circuits in addition.Experiment confirm, the acoustic pressure distribution character and the V of the low frequency more than 200 hertz
8The height and the C of the current potential (unit volt) of point
1The capacitance size relevant, work as C
1One timing (usually between 20～250 microfarads) V
8The point current potential is high more, or R1 one timing (usually between 100 ohm～700 ohm) C
1Value big more (being everlasting between 20～250 microfarads), the loud speaker acoustic pressure that connects behind the ground bass frequency dividing circuit is big more, works as C
1Greater than 20 microfarads, R
1During greater than 300 ohm, the low-frequency range acoustic pressure more than 200 hertz concentrates on by C
2And L
2In the loud speaker of serial connection back, C
1And R
1When getting bigger parameter value, difference is not obvious, therefore, works as C
1Value is greater than 20 microfarads (value between 200～250 microfarads of being everlasting), R
1Greater than 300 ohm (often getting more than 600 ohm), C
2About 130 microfarads, when L approximately gets 3.0 person of outstanding talent's henries, can avoid the destruction of electric phase distortion to tone color.But C
1, R
1To C
2The deeper principle of influence of load capacity remain further research.
Four, solved the rational proportion assignment problem of frequency response.
Because people's ear to the sensory characteristic of the sense of hearing is, blunt to the middle pitch sensitivity to high pitch and bass frequency range, so the frequency response of middle pitch frequency range (about 900～6000 hertz) needs higher-frequency and low frequency low.Concrete pro rate must be decided by used ground bass loud speaker Frequency Response.
See shown in Figure 8ly, the power divider of the complete clear fidelity of the present invention is provided with by capacitor C
3, inductance L
3And resistance R
2The electric loop of the imitative middle pitch frequency division of serial connection is (or by C
3, L
3The middle pitch frequency dividing circuit of serial connection), by control capacittance C
3And resistance R
2Numerical value, can make the frequency response of high frequency, intermediate frequency, each frequency range of low frequency reach rational proportion and distribute.
Five, realized that each frequency range and whole range are clear fully.
Because people's ear have an ear for degree characteristic is, to the middle pitch sensitivity, blunt to high pitch and bass frequency range, so the part-frequency point of middle pitch and common high pitch should be selected near 6000 hertz of points (or), thereby common high pitch loudspeaker must be reset 5000 hertz with super band (if the high pass of 6000 hertz of frequencies need not the most precipitous-12dB/oct attenuation rate in the attenuation rate of-6dB place intersection), its power that bears is bigger like this, thereby requiring the magnetic field of permanent magnet of this loud speaker bigger, the electromagnetic field that causes the requirement voice coil loudspeaker voice coil to generate is bigger than ambassador's voice coil loudspeaker voice coil inductance value.Bigger inductance value can make the above superelevation sound of 12 KHz unintelligible.If want hyperfrequency that better slightly performance is arranged, then cost is very high, the also difficult people's will to the greatest extent of effect.For solving superelevation sound sharpness problems, see Fig. 8, the power divider of the complete clear fidelity of the present invention is provided with common high pitch frequency dividing circuit, by capacitor C
4Be connected in series inductance L with loud speaker
4, capacitor C
5Constitute inductance L with loud speaker and the mode that connects
4Filter intermediate frequency and play the effect of protection loud speaker, capacitor C
5Filter the superelevation audio section, work the definition effect that guarantees.Also be provided with by capacitor C
6The superelevation cent frequency circuit of serial connection, C
6Parameter value be everlasting about 0.5 microfarad C
6After what connect is superelevation sound tailored version loud speaker, its cost is lower usually, thereby guarantees the quality of whole high segment, and reduces cost.
Other supporting technologies
Invent the power divider of complete clear fidelity, purpose is in order to make the speaker system of complete clear fidelity.And body structure partly is one of another part of speaker system, and for achieving the above object, this part need have the new technology structure to be cooperated.In view of the above, can adopt paraphase class body structure to be cooperated, but the area of paraphase hole should be much smaller than the corresponding areas of existing technology product (between 1/2～1/5)
Aspect source of sound, comprise that radio frequency amplifies (RF), audio digital signals is handled (dsp) part, digital signal revolving die analog signal part (DAC), the audio power amplifier section, and the power supply of each several part all can not be finished the work perfunctorily, but need not to adopt expensive " fever " element, except above-mentioned RF, dsp, used integrated package of DAC and power amplifying transistor are outside the common import parts, remainder adopts homemade high-quality element, to those extremely fastidious consumers (or claim old-timer " fan ") has been perfect and handled a situation with ease, certainly whether consummate this technology that relates to each part mentioned above use problem, and the ins and outs of each part mentioned above will not describe in detail.
Excellent properties beyond the tonequality
The present invention is except the effect of clear fully and fidelity, and all even better than existing technology product in each side such as dynamic range, sensitivity, efficient, reliability, stability, its principle here needn't describe in detail.
Claims (3)
1, a kind of power divider of complete clear fidelity, comprise input S, common port C, be attempted by the superelevation cent frequency circuit on input S and the common port C, common high pitch frequency dividing circuit, imitative middle pitch frequency dividing circuit, the bass frequency dividing circuit is characterized in that being provided with the capacitor C of serial connection on input S and common port C
1And resistance R
1Electric loop, and be provided with capacitor C
2Serial connection or capacitor C
2With inductance L
2The ground bass frequency dividing circuit of serial connection.
2, the power divider of complete clear fidelity according to claim 1 is characterized in that described capacitor C
15～20 * 10
5The microfarad scope, resistance R
1Resistance is greater than 5 ohm of scopes.
3, the power divider of complete clear fidelity according to claim 1 is characterized in that described capacitor C
2Parameter value is in 50～50000 microfarad scopes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026965 CN1691836A (en) | 2004-04-23 | 2004-04-23 | Power frequency divider with complete definition and fidelity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026965 CN1691836A (en) | 2004-04-23 | 2004-04-23 | Power frequency divider with complete definition and fidelity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1691836A true CN1691836A (en) | 2005-11-02 |
Family
ID=35346887
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410026965 Pending CN1691836A (en) | 2004-04-23 | 2004-04-23 | Power frequency divider with complete definition and fidelity |
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| Country | Link |
|---|---|
| CN (1) | CN1691836A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790930A (en) * | 2011-05-17 | 2012-11-21 | 李树海 | Pure music reproducing system |
| CN101378602B (en) * | 2007-08-28 | 2013-03-20 | 鸿富锦精密工业（深圳）有限公司 | Display acoustics circuit |
| CN111063324A (en) * | 2019-12-24 | 2020-04-24 | 东莞市融贤实业有限公司 | Tommy type antique speaker system |
-
2004
- 2004-04-23 CN CN 200410026965 patent/CN1691836A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101378602B (en) * | 2007-08-28 | 2013-03-20 | 鸿富锦精密工业（深圳）有限公司 | Display acoustics circuit |
| CN102790930A (en) * | 2011-05-17 | 2012-11-21 | 李树海 | Pure music reproducing system |
| CN111063324A (en) * | 2019-12-24 | 2020-04-24 | 东莞市融贤实业有限公司 | Tommy type antique speaker system |
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