CN103686539A - Simulation low-frequency voice frequency overtone generation circuit - Google Patents
Simulation low-frequency voice frequency overtone generation circuit Download PDFInfo
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- CN103686539A CN103686539A CN201310689655.XA CN201310689655A CN103686539A CN 103686539 A CN103686539 A CN 103686539A CN 201310689655 A CN201310689655 A CN 201310689655A CN 103686539 A CN103686539 A CN 103686539A
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Abstract
The invention discloses a simulation low-frequency voice frequency overtone generation circuit. The signal input end of the simulation low-frequency voice frequency overtone generation circuit is arranged at the input end of an emitter follower. The output end of the emitter follower is connected with the input end of a band-pass filtering circuit. The output end of the band-pass filtering circuit is connected with the input end of a second harmonic generation circuit. The output end of the second harmonic generation circuit is connected with the input end of a higher harmonic filtering device. The output end of the higher harmonic filtering device, the output end of a low pass filter and one end of a resistor R18 are connected. The other end of the resistor R18 is connected with the input end of a signal mixer. The signal output end of the simulation low-frequency voice frequency overtone generation circuit is arranged at the output end of the signal mixer. The circuit can mix fundamental tones and overtones into one kind of voice frequency.
Description
Technical field
The present invention relates to sound technique field, is specifically that a kind of simulation low frequency audio frequency overtone produces circuit.
Background technology
The simulation bass frequency circuit of prior art comprises emitter follower and low pass filter, described emitter follower is connected with low pass filter, the input of described emitter follower is the input of this simulation low-frequency channel, and the output of described low pass filter is the output of this simulation low-frequency channel.There is following defect in the simulation bass frequency circuit of said structure: because this simulation bass frequency circuit can only be exported fundamental tone in actual use procedure, and this fundamental tone is directly to export to power amplifier, therefore make to play back bass have cavity sense, thereby make its bass effect poor.So, for these reasons, urgently need a kind ofly fundamental tone and overtone to be mixed to synthetic simulation low frequency audio frequency overtone and produce circuit, to address the above problem.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the defect of above prior art, provides a kind of simulation low frequency audio frequency overtone that fundamental tone and overtone can be mixed to synthetic a kind of audio frequency to produce circuit.
Technical scheme of the present invention is, provides a kind of simulation low frequency audio frequency overtone to produce circuit, comprises emitter follower and low pass filter, and the output of described emitter follower is connected with the input of low pass filter; Described simulation low frequency audio frequency overtone produces circuit and also comprises that bandwidth-limited circuit, second harmonic produce circuit, high order harmonic component stripper, resistance R 18 and signal mixer; The input of described emitter follower is the signal input part of simulation low frequency audio frequency overtone generation circuit; The output of described emitter follower is connected with the input of bandwidth-limited circuit; The output of described bandwidth-limited circuit is connected with the input that second harmonic produces circuit; The output that described second harmonic produces circuit is connected with the input of high order harmonic component stripper; The output of described high order harmonic component stripper, the output of low pass filter are connected with one end of resistance R 18; The other end of described resistance R 18 is connected with the input of signal mixer; The output of described signal mixer is the signal output part of simulation low frequency audio frequency overtone generation circuit.
Described simulation low frequency audio frequency overtone produces circuit and also comprises an overtone size control circuit, and the input of described overtone size control circuit is connected with the other end of resistance R 18, and the described overtone size output of control circuit and the input of signal mixer are connected.
Described overtone size control circuit is a slide rheostat.
Described simulation low frequency audio frequency overtone produces circuit and also comprises that one is connected to the electrochemical capacitor C14 between bandwidth-limited circuit and second harmonic generation circuit, the positive pole of described electrochemical capacitor C14 is connected with bandwidth-limited circuit, and the negative pole of described electrochemical capacitor C14 produces circuit with second harmonic and is connected.
Described bandwidth-limited circuit comprises capacitor C 7, C8, C9, C10, resistance R 5, R6, R7, R8, amplifier U1C, U2A; One end of described capacitor C 7 is the input of bandwidth-limited circuit, and the other end of described capacitor C 7 is connected with one end of capacitor C 8, one end of resistance R 5; One end of described capacitor C 8 is connected with one end of resistance R 6, the positive input terminal of amplifier U1C; The other end of described resistance R 6 is connected with common ground end; The other end of described resistance R 5 with the negative input end of amplifier U1C, one end of the output of amplifier U1C, resistance R 7 be connected; The other end of described resistance R 7 is connected with one end of resistance R 8, one end of capacitor C 9; The other end of described resistance R 8 is connected with one end of capacitor C 10, the positive input terminal of amplifier U2A; The other end of described capacitor C 10 is connected with common ground end; The other end of described capacitor C 9 is connected with the negative input end of amplifier U2A, the output of amplifier U2A; The output of described amplifier U2A is the output of bandwidth-limited circuit.
Described second harmonic produces circuit and comprises resistance R 11, R12, R13, R14, R15, diode D1, D2 and amplifier U2B, U2C; One end of one end of described resistance R 11 and resistance R 14 is the input that second harmonic produces circuit, and the other end of described resistance R 11 is connected with the negative input end of amplifier U2B, one end of the anode of diode D1, resistance R 12; The other end of described resistance R 12 is connected with one end of resistance R 13, the negative electrode of diode D2; The positive input terminal of described amplifier U2B is connected with common ground end; The anodic bonding of the negative electrode of the output of described amplifier U2B and diode D1, diode D2; The other end of described resistance R 13 is connected with the other end, one end of resistance R 15, the negative input end of amplifier U2C of resistance R 14; The positive input terminal of described amplifier U2C is connected with common ground end; The other end of the output of described amplifier U2C, resistance R 15 is the output that second harmonic produces circuit.
Adopt after above structure, the present invention compared with prior art, has the following advantages:
The present invention simulates low frequency audio frequency overtone and produces circuit after signal input, after low pass filter, export fundamental tone, through bandwidth-limited circuit, second harmonic, after producing circuit, high order harmonic component stripper, export overtone, fundamental tone is exported after signal mixer mixes with overtone.Because this circuit can be exported fundamental tone and overtone (having produced frequency multiplication twice), fundamental tone and overtone can be mixed to rear output again.Therefore its play back bass have thick and heavy sense, thereby make its bass effect better.
As improvement, described simulation low frequency audio frequency overtone produces circuit and also comprises an overtone size control circuit, the input of described overtone size control circuit is connected with the output of high order harmonic component stripper, and the described overtone size output of control circuit and the input of signal mixer are connected.By overtone size control circuit, control the signal strength signal intensity of overtone, the mixed effect mixing to change fundamental tone and overtone, simulates thereby improve the present invention the bass effect that low frequency audio frequency overtone produces circuit.
Accompanying drawing explanation
Fig. 1 is that the present invention simulates the block diagram that low frequency audio frequency overtone produces circuit.
Fig. 2 is that the present invention simulates the circuit theory diagrams that low frequency audio frequency overtone produces circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1 and Figure 2, a kind of simulation low frequency of the present invention audio frequency overtone produces circuit, comprises emitter follower and low pass filter, and the output of described emitter follower is connected with the input of low pass filter; Before emitter follower, be also connected with resistance R 1, resistance C1, these devices and annexation are prior art, are not described in detail in this; Emitter follower, low pass filter, signal mixer are conventional operational amplifier built-up circuit well known to those skilled in the art, and high order harmonic component stripper is identical with the structure of low pass filter, and just the parameter of internal components is different; Described simulation low frequency audio frequency overtone produces circuit and also comprises that bandwidth-limited circuit, second harmonic produce circuit, high order harmonic component stripper, resistance R 18 and signal mixer; The input of described emitter follower is the signal input part of simulation low frequency audio frequency overtone generation circuit; The output of described emitter follower is connected with the input of bandwidth-limited circuit; The output of described bandwidth-limited circuit is connected with the input that second harmonic produces circuit; The output that described second harmonic produces circuit is connected with the input of high order harmonic component stripper; The output of described high order harmonic component stripper, the output of low pass filter are connected with one end of resistance R 18; The other end of described resistance R 18 is connected with the input of signal mixer; The output of described signal mixer is the signal output part of simulation low frequency audio frequency overtone generation circuit.
Described simulation low frequency audio frequency overtone produces circuit and also comprises an overtone size control circuit, and the input of described overtone size control circuit is connected with the other end of resistance R 18, and the described overtone size output of control circuit and the input of signal mixer are connected.
Described overtone size control circuit is a slide rheostat.Described simulation low frequency audio frequency overtone produces circuit and also comprises that one is connected to the electrochemical capacitor C14 between bandwidth-limited circuit and second harmonic generation circuit, the positive pole of described electrochemical capacitor C14 is connected with bandwidth-limited circuit, and the negative pole of described electrochemical capacitor C14 produces circuit with second harmonic and is connected.
Described bandwidth-limited circuit comprises capacitor C 7, C8, C9, C10, resistance R 5, R6, R7, R8, amplifier U1C, U2A; One end of described capacitor C 7 is the input of bandwidth-limited circuit, and the other end of described capacitor C 7 is connected with one end of capacitor C 8, one end of resistance R 5; One end of described capacitor C 8 is connected with one end of resistance R 6, the positive input terminal of amplifier U1C; The other end of described resistance R 6 is connected with common ground end; The other end of described resistance R 5 with the negative input end of amplifier U1C, one end of the output of amplifier U1C, resistance R 7 be connected; The other end of described resistance R 7 is connected with one end of resistance R 8, one end of capacitor C 9; The other end of described resistance R 8 is connected with one end of capacitor C 10, the positive input terminal of amplifier U2A; The other end of described capacitor C 10 is connected with common ground end; The other end of described capacitor C 9 is connected with the negative input end of amplifier U2A, the output of amplifier U2A; The output of described amplifier U2A is the output of bandwidth-limited circuit.
Described second harmonic produces circuit and comprises resistance R 11, R12, R13, R14, R15, diode D1, D2 and amplifier U2B, U2C; One end of one end of described resistance R 11 and resistance R 14 is the input that second harmonic produces circuit, and the other end of described resistance R 11 is connected with the negative input end of amplifier U2B, one end of the anode of diode D1, resistance R 12; The other end of described resistance R 12 is connected with one end of resistance R 13, the negative electrode of diode D2; The positive input terminal of described amplifier U2B is connected with common ground end; The anodic bonding of the negative electrode of the output of described amplifier U2B and diode D1, diode D2; The other end of described resistance R 13 is connected with the other end, one end of resistance R 15, the negative input end of amplifier U2C of resistance R 14; The positive input terminal of described amplifier U2C is connected with common ground end; The other end of the output of described amplifier U2C, resistance R 15 is the output that second harmonic produces circuit.
The present invention simulates low frequency audio frequency overtone and produces circuit after signal input, after low pass filter, export fundamental tone, band bandwidth-limited circuit, second harmonic are exported overtone after producing circuit, high order harmonic component stripper, and fundamental tone is exported after signal mixer mixes with overtone.
Below only with regard to most preferred embodiment of the present invention, be described, but can not be interpreted as it is limitations on claims.The present invention is not limited only to above embodiment, and its concrete structure allows to change.In every case the various variations of doing in the protection range of independent claims of the present invention are all in protection scope of the present invention.
Claims (6)
1. simulation low frequency audio frequency overtone produces a circuit, comprises emitter follower and low pass filter, and the output of described emitter follower is connected with the input of low pass filter; It is characterized in that: described simulation low frequency audio frequency overtone produces circuit and also comprises that bandwidth-limited circuit, second harmonic produce circuit, high order harmonic component stripper, resistance R 18 and signal mixer; The input of described emitter follower is the signal input part of simulation low frequency audio frequency overtone generation circuit; The output of described emitter follower is connected with the input of bandwidth-limited circuit; The output of described bandwidth-limited circuit is connected with the input that second harmonic produces circuit; The output that described second harmonic produces circuit is connected with the input of high order harmonic component stripper; The output of described high order harmonic component stripper, the output of low pass filter are connected with one end of resistance R 18; The other end of described resistance R 18 is connected with the input of signal mixer; The output of described signal mixer is the signal output part of simulation low frequency audio frequency overtone generation circuit.
2. simulation low frequency audio frequency overtone according to claim 1 produces circuit, it is characterized in that: described simulation low frequency audio frequency overtone produces circuit and also comprises an overtone size control circuit, the input of described overtone size control circuit is connected with the other end of resistance R 18, and the described overtone size output of control circuit and the input of signal mixer are connected.
3. simulation low frequency audio frequency overtone according to claim 2 produces circuit, it is characterized in that: described overtone size control circuit is a slide rheostat.
4. simulation low frequency audio frequency overtone according to claim 1 produces circuit, it is characterized in that: described simulation low frequency audio frequency overtone produces circuit and also comprises that one is connected to the electrochemical capacitor C14 between bandwidth-limited circuit and second harmonic generation circuit, the positive pole of described electrochemical capacitor C14 is connected with bandwidth-limited circuit, and the negative pole of described electrochemical capacitor C14 produces circuit with second harmonic and is connected.
5. simulation low frequency audio frequency overtone according to claim 1 produces circuit, it is characterized in that: described bandwidth-limited circuit comprises capacitor C 7, C8, C9, C10 resistance R 5, R6, R7, R8, amplifier U1C, U2A; One end of described capacitor C 7 is the input of bandwidth-limited circuit, and the other end of described capacitor C 7 is connected with one end of capacitor C 8, one end of resistance R 5; One end of described capacitor C 8 is connected with one end of resistance R 6, the positive input terminal of amplifier U1C; The other end of described resistance R 6 is connected with common ground end; The other end of described resistance R 5 with the negative input end of amplifier U1C, one end of the output of amplifier U1C, resistance R 7 be connected; The other end of described resistance R 7 is connected with one end of resistance R 8, one end of capacitor C 9; The other end of described resistance R 8 is connected with one end of capacitor C 10, the positive input terminal of amplifier U2A; The other end of described capacitor C 10 is connected with common ground end; The other end of described capacitor C 9 is connected with the negative input end of amplifier U2A, the output of amplifier U2A; The output of described amplifier U2A is the output of bandwidth-limited circuit.
6. simulation low frequency audio frequency overtone according to claim 1 produces circuit, it is characterized in that: described second harmonic produces circuit and comprises resistance R 11, R12, R13, R14, R15, diode D1, D2 and amplifier U2B, U2C; One end of one end of described resistance R 11 and resistance R 14 is the input that second harmonic produces circuit, and the other end of described resistance R 11 is connected with the negative input end of amplifier U2B, one end of the anode of diode D1, resistance R 12; The other end of described resistance R 12 is connected with one end of resistance R 13, the negative electrode of diode D2; The positive input terminal of described amplifier U2B is connected with common ground end; The anodic bonding of the negative electrode of the output of described amplifier U2B and diode D1, diode D2; The other end of described resistance R 13 is connected with the other end, one end of resistance R 15, the negative input end of amplifier U2C of resistance R 14; The positive input terminal of described amplifier U2C is connected with common ground end; The other end of the output of described amplifier U2C, resistance R 15 is the output that second harmonic produces circuit.
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| CN201310689655.XA CN103686539B (en) | 2013-12-13 | 2013-12-13 | Simulation low-frequency voice frequency overtone generation circuit |
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| CN201310689655.XA CN103686539B (en) | 2013-12-13 | 2013-12-13 | Simulation low-frequency voice frequency overtone generation circuit |
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| CN103686539B CN103686539B (en) | 2017-02-15 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006046321A (en) * | 2004-07-09 | 2006-02-16 | Sanden Corp | Centrifugal blower |
| CN101170302A (en) * | 2006-10-27 | 2008-04-30 | 索尼株式会社 | Audio processing method and audio processing apparatus |
| US20110013783A1 (en) * | 2008-03-19 | 2011-01-20 | Pioneer Corporation | Overtone production device, acoustic device, and overtone production method |
| CN203618115U (en) * | 2013-12-13 | 2014-05-28 | 宁波中荣声学科技有限公司 | Analog low-frequency audio overtone generation circuit |
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2013
- 2013-12-13 CN CN201310689655.XA patent/CN103686539B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006046321A (en) * | 2004-07-09 | 2006-02-16 | Sanden Corp | Centrifugal blower |
| CN101170302A (en) * | 2006-10-27 | 2008-04-30 | 索尼株式会社 | Audio processing method and audio processing apparatus |
| US20110013783A1 (en) * | 2008-03-19 | 2011-01-20 | Pioneer Corporation | Overtone production device, acoustic device, and overtone production method |
| CN203618115U (en) * | 2013-12-13 | 2014-05-28 | 宁波中荣声学科技有限公司 | Analog low-frequency audio overtone generation circuit |
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