CN1034546C - Series connection in the same direction stereo reproducing system - Google Patents
Series connection in the same direction stereo reproducing system Download PDFInfo
- Publication number
- CN1034546C CN1034546C CN91106414A CN91106414A CN1034546C CN 1034546 C CN1034546 C CN 1034546C CN 91106414 A CN91106414 A CN 91106414A CN 91106414 A CN91106414 A CN 91106414A CN 1034546 C CN1034546 C CN 1034546C
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- stereo
- signal
- reproducing system
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- circuit
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Abstract
The present invention provides a stereophonic reproduction system for connecting electrical signals in series in the same direction. The present invention is mainly characterized in that two-channel stereophonic electrical signals transmitted forwards are mainly connected with a public end, connection in series in the same direction is realized by making signals at the left side and the right side to be opposite in phase, and the signals are input in a stereophonic low-frequency amplification circuit. The signals on the public end line are weakened, the sum of the stereophonic electrical signals can be directly output, and the problems of poor low frequency response, bad symmetry, need of increasing power amplifiers for outputting L+R signals, etc. of OTL circuits can be solved.
Description
The present invention relates to the electronic signal amplification system, the stereo reproducing system that particularly a kind of electrical stereo signal is connected in series in the same way is applicable to all kinds of audio-video devices and instrument.
Existing stereo reproducing system, mainly form by connections such as transducer, connector, amplifiers, wherein, transducer is the information source of low-frequency amplifier circuit or the critical component in the load, for example electroacoustic component, magnetic head, radio reception head, pickup, digital to analog converter, optical-electrical converter, display etc.In the stereophony playback system, left and right sides audio signal is separately transmission, the main polarity of transmission forward of left and right sides signal, about be consistent.Output circuit in the low-frequency amplifier circuit, the general OTL circuit that adopts, its LF-response is poor, symmetry is bad, and the method for solution is the capacity that increases output coupling capacitor, sometimes, in order to improve the stereo and bass effect of playback, and adopting matrix circuit, middle supper bass power amplification circuit, these ways need increase power amplifier etc., are difficult in the general device implementing.
The purpose of this invention is to provide a kind of method of improving stereo reproducing system, not only can improve the amplification quality, increase function etc. and can also save device.
The present invention finishes in the following manner: the different name end by stereo converter, amplifier connects, make the main electrical stereo signal of transmission forward be connected in series in the same way, and input stereo audio low-frequency amplifier circuit or loudspeaker, be used for exporting electrical stereo signal or electrical stereo signal sum, weaken the signal on the public end line of stereo low-frequency amplifier circuit.Thereby reduced public end line or on it electric capacity etc. to the influence of circuit performance, thereby also solved the problems referred to above.
Principle of the present invention is similarly with the reason of battery serial connection, in the stereophony playback system, generally adopts XY system pickup mode, and left and right sides signal Main Ingredients and Appearance can be approximately the homophase constant amplitude.Connect by changing, the main stereophony signal of telecommunication of transmission forward is associated on the common port, and its polarity left and right sides inconsistent (left and right sides is anti-phase) is electrical stereo signal and is connected in series in the same way.A plurality of signals can be on one point or multiple spot serial connection in the same way in pairs, wherein, mainly contains the meaning of the main force rather than branch.Like this, on public end line, signal is an one-in-and-one-out, weakens mutually; Two signal output is to strengthen mutually, it is applied in stereo low-frequency amplifier circuit and the loudspeaker, in two OTL circuit, adopt the public coupling capacitance in the left and right sides, for bass or intermediate sound or mono signal M=L+R, can obtain the structure and the effect of BTL circuit, and L, R, L+R signal directly output simultaneously, the L+R signal is exported to a middle subwoofer, can improve bass effect, save woofer and middle supper bass power amplifier, also improve the LF-response and the symmetry of OTL circuit simultaneously.In like manner, two BTL circuit adopt duplicate supplys, can be connected into monophony, two BTL, four OTL circuit and the circuit deposited etc.
Because the present invention just changes the connection of circuit, rather than removes to increase capacitance, increase power amplifier, so it is easy to implement, best way is to change connecting between existing information source and the low-frequency amplifier circuit, as adopting photoelectricity shielding system, the electrical stereo signal that is connected in series in the same way.Like this, stereo loads such as boombox, earphone, magnetic head must be connected on the common port by the different name end, can accomplish that just the phase place of playback and magnetic recording etc. is correct, i.e. left and right sides polarity unanimity.
The present invention is further illustrated below with reference to drawings and Examples.
Fig. 1 is connected in series the electrical stereo signal schematic diagram in the same way for the present invention.
Fig. 2 is a kind of stereo reproducing system square frame of the present invention and electric principle sketch.
Fig. 3 is a kind of tape playback sound amplifier electrical schematic diagram of the present invention.
Among the figure, marked the end of the same name (or different name end) of device with sign, L, M, R represent left, center, right signal or message respectively, and-R represents anti-phase right signal, wherein M=L+R.The I that marks under the ground connection symbol, O represent public input, the output of low-frequency amplifier circuit A respectively, and arrow is represented direction.The capacity of public output coupling capacitor C1, C2 is less, as 100 μ F.
Among Fig. 1, two kinds of methods that the stereophony signal of telecommunication is connected in series have in the same way only been provided. One Kind is connected on the common port CO for two-channel converter Z left and right sides different name end, is direct method. In addition A kind of is to be that converter Z connects with amplifier A different name end, two amplifiers in the R sound channel A just is connected in series during output, is indirect method. When input L, R signal, output is all for going here and there in the same way The L that connects ,-the R signal of telecommunication.
Embodiment 1, sees accompanying drawing 2, is a kind of stereo reproducing system of the present invention.Among the figure, information source output L, R signal, through photoelectricity shielding system (block diagram), be transformed into L ,-electrical stereo signal that R is connected in series in the same way, through stereo low-frequency amplifier circuit A, after exporting stereo jack CZ to, the one tunnel send a loud speaker Y to do the playback of monophony M=L+R signal, and another road send external earphone EJ etc. to do stereophonic reproduction.The low frequency amplification output circuit adopts the OTL circuit, the termination power of public output coupling capacitor C1, one termination load, two OTL circuit direct current output forms are BTL bridge circuit output form, therefore the LF-response and the symmetry of OTL circuit are better, and wherein left and right sides luminous tube, earphone are that the different name end is connected on the common port.
Embodiment 2, see accompanying drawing 3, are a kind of tape playback sound amplifier of the present invention, among the figure, M sound input microphone, through acoustic image balance locator W (simply connected) resolve into L ,-the R signal, with the L of stereo magnetic head S output ,-R signal mixings input stereo audio low-frequency amplifier circuit A, its output circuit employing OTL.Public output coupling capacitor C1, C2 connect, and two ends are in parallel with power supply E, and the double power filter of doing, and mid point connects the common port of left and right sides loud speaker, and therefore, two capacitive coupling are complementary, and the output symmetry is good.Two OTL circuit direct current output forms are BTL bridge circuit output form.Loudspeaker is divided left, center, right three tunnel, carries out L, L+R, R stereophonic reproduction respectively.When adopting the Hi-Fi sound-box playback, hearing effect is better, and sound is clear, the bass grace, and wherein left and right sides magnetic head S, loud speaker Y are that the different name end is connected on the common port, middle loud speaker is to be associated on the output of common port both sides.
Claims (3)
1. stereo reproducing system, mainly connect and form by transducer, amplifier, it is characterized in that: the different name end by stereo converter or amplifier connects, allow the main anti-phase transmission in the electrical stereo signal left and right sides of transmission forward, input stereo audio low-frequency amplifier circuit or loudspeaker, be used for exporting electrical stereo signal or electrical stereo signal sum, perhaps be used for weakening the signal on the public end line of stereo low-frequency amplifier circuit.
2. by the described stereo reproducing system of claim 1, it is characterized in that: left and right sides loud speaker or earphone are that the different name end is connected on the common port, and middle woofer is to be connected on the output of common port both sides.
3. by the described stereo reproducing system of claim 1, it is characterized in that: when output circuit adopted output coupling capacitor, an end of output coupling capacitor linked to each other with load, and the other end links to each other with power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91106414A CN1034546C (en) | 1991-05-11 | 1991-05-11 | Series connection in the same direction stereo reproducing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91106414A CN1034546C (en) | 1991-05-11 | 1991-05-11 | Series connection in the same direction stereo reproducing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1066951A CN1066951A (en) | 1992-12-09 |
| CN1034546C true CN1034546C (en) | 1997-04-09 |
Family
ID=4907832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91106414A Expired - Fee Related CN1034546C (en) | 1991-05-11 | 1991-05-11 | Series connection in the same direction stereo reproducing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1034546C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5469509A (en) * | 1993-12-30 | 1995-11-21 | Monster Cable International, Ltd. | Car audio system with high signal output |
| CN1735286B (en) * | 2005-07-21 | 2010-09-29 | 深圳创维－Rgb电子有限公司 | Three-dimensional processing device and method for AF media |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4209665A (en) * | 1977-08-29 | 1980-06-24 | Victor Company Of Japan, Limited | Audio signal translation for loudspeaker and headphone sound reproduction |
-
1991
- 1991-05-11 CN CN91106414A patent/CN1034546C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4209665A (en) * | 1977-08-29 | 1980-06-24 | Victor Company Of Japan, Limited | Audio signal translation for loudspeaker and headphone sound reproduction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1066951A (en) | 1992-12-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19970409 |