CN108235184B - Bass enhancement circuit and audio playing equipment - Google Patents
Bass enhancement circuit and audio playing equipment Download PDFInfo
- Publication number
- CN108235184B CN108235184B CN201810045294.8A CN201810045294A CN108235184B CN 108235184 B CN108235184 B CN 108235184B CN 201810045294 A CN201810045294 A CN 201810045294A CN 108235184 B CN108235184 B CN 108235184B
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistor
- detection
- branch
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
Abstract
The invention discloses a bass boost circuit and an audio playing device. The bass enhancement circuit comprises an input circuit, a signal amplification circuit, a low-frequency detection circuit and an adjusting output circuit which are sequentially connected, wherein an audio signal enters the signal amplification circuit through the input circuit, the signal amplification circuit amplifies the audio signal and then sends the amplified audio signal to the low-frequency detection circuit, the audio signal is enhanced, the low-frequency detection circuit separates the low-frequency signal from the amplified audio signal, and finally, the adjusting output circuit sets intensity gain to superpose the low-frequency signal to the original audio signal, so that the bass signal is enhanced, and the bass effect is provided for listeners.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a bass enhancement circuit and audio playing equipment.
Background
With the pursuit of the quality of music listening, the performance requirements of audio playing devices are higher and higher. Since low frequencies are rich in energy, the impact of the musical impact depends to a large extent on the representation of the bass. Therefore, in the earphone type product, especially for the game type earphone product, the listener wants to obtain a stronger bass effect to obtain a more immersive experience.
Disclosure of Invention
In view of the problems of the prior art in which listeners demand a bass enhancement effect, a bass enhancement circuit and an audio playback apparatus of the present invention are proposed in order to overcome the above problems or at least partially solve the above problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to an aspect of the present invention, there is provided a bass boost circuit including an input circuit, a signal amplification circuit, a low-frequency detection circuit, and a regulation output circuit connected in this order; the input circuit is connected with an audio signal source, receives an audio signal and sends the audio signal to the signal amplifying circuit; the signal amplification circuit amplifies the audio signal and then sends the amplified audio signal to the low-frequency detection circuit; the low-frequency detection circuit receives the amplified audio signal, separates a low-frequency signal from the amplified audio signal and sends the low-frequency signal to the regulation output circuit; the adjusting output circuit adjusts the intensity gain of the low-frequency signal and outputs and superimposes the low-frequency signal to the original audio signal according to the adjusted intensity gain.
Optionally, the low frequency detection circuit includes: the RC detection branch circuit comprises a follow triode Q1 and an output resistor R9; the input end of the RC detection branch is connected with the signal amplification circuit, and the output end of the RC detection branch is connected with the base electrode of the following triode Q1; the collector of the following triode Q1 is connected with a power supply, and the emitter of the following triode Q1 is connected with one end of the output resistor R9; the other end of the output resistor R9 is grounded; the connection end of the emitter of the following triode Q1 and the output resistor R9 is connected with the feedback ends of the regulation output circuit and the RC detection branch circuit.
Optionally, the RC detection branch includes: the detector comprises a detection resistor R4, a detection resistor R3, a detection capacitor C2 and a detection capacitor C1;
the signal amplification circuit is connected to the one end of detection resistance R4 the one end of detection resistance R3 with the one end of detection electric capacity C2, the other end of detection resistance R4 is connected the signal amplification circuit, the other end of detection resistance R3 is connected the one end of detection electric capacity C1, the other end ground connection of detection electric capacity C1, detection resistance R3 with the link of detection electric capacity C1 is connected follow triode Q1's base, the other end of detection electric capacity C2 is connected output resistance R9 with the link of following triode Q1 projecting pole.
Optionally, the regulated output circuit comprises: a slide rheostat RT1, wherein one fixed end of the slide rheostat RT1 is the input end of the regulating output circuit and is connected with the low-frequency detection circuit, the other fixed end of the slide rheostat RT1 is grounded, and the slide end of the slide rheostat RT1 is the output end of the regulating output circuit;
the bass boost circuit further comprises: a coupling capacitor C5, the coupling capacitor C5 is connected between the low frequency detection circuit and the regulated output circuit.
Optionally, the input circuit comprises: the audio amplifier comprises two input branches with the same structure, wherein the starting ends of the two input branches are respectively connected with a left channel audio signal source and a right channel audio signal source, the tail ends of the two input branches are commonly connected with the input end of the signal amplification circuit, and left channel signals and right channel signals are merged and input into the signal amplification circuit.
Optionally, the input branch comprises: the audio signal flows in from the input capacitor and is output to the signal amplifying circuit through the input resistor.
Optionally, the signal amplification circuit comprises: the bias branch circuit and the amplification branch circuit are connected in sequence, the bias branch circuit is connected with the input circuit, and the amplification branch circuit is connected with the low-frequency detection circuit; the bias branch circuit receives the audio signal from the input circuit, adds a direct-current bias voltage to the audio signal and then sends the audio signal to the amplification branch circuit, and the amplification branch circuit amplifies the biased audio signal and sends the amplified audio signal to the low-frequency detection circuit.
Optionally, the bias branch comprises: the circuit comprises a blocking capacitor C4, an adjusting resistor R6, a bias resistor R8, a pull-up resistor R2 and a triode Q3;
one end of the blocking capacitor C4 and one end of the bias resistor R8 are connected with the base electrode of the triode Q3, and the connection end is the input end of the bias branch and is connected with the input circuit; the other end of the direct current blocking capacitor C4 is connected with one end of the adjusting resistor R6; the other end of the adjusting resistor R6, the other end of the biasing resistor R8 and one end of the pull-up resistor R2 are connected with the collector of the triode Q3, and the connecting end is the output end of the biasing branch and is connected with the amplifying branch; the other end of the pull-up resistor R2 is connected with a power supply end.
Optionally, the amplifying branch comprises: the transistor Q2, a pull-up resistor R1 and a feedback resistor R10, the base of the transistor Q2 is the input end of the amplification branch and is connected with the bias branch, the collector of the transistor Q2 is connected with a power supply end through the pull-up resistor R1, the emitter of the transistor Q2 is grounded through the feedback resistor R10, and the connection end of the collector of the transistor Q2 and the pull-up resistor R1 is the output end of the amplification branch and is connected with the low-frequency detection circuit.
According to another aspect of the present invention, there is provided an audio playback apparatus provided with the bass boost circuit as described in any one of the above.
In conclusion, the beneficial effects of the invention are as follows:
the bass enhancement circuit comprises an input circuit, a signal amplification circuit, a low-frequency detection circuit and an adjusting output circuit which are sequentially connected, wherein after an original audio signal is amplified, a low-frequency signal is separated from the original audio signal, and the low-frequency signal is output and superposed to the original audio signal in an adjustable gain size, so that the low-frequency component in the original audio signal is improved, the bass enhancement effect is realized, and more shocking bass experience is provided for a listener.
Drawings
Fig. 1 is a schematic diagram of a bass boost circuit according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a bass boost circuit according to an embodiment of the present invention;
fig. 3 is an enlarged schematic diagram of a signal amplifying circuit of the bass enhancing circuit shown in fig. 2 according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The technical conception of the invention is as follows: the low-frequency signal amplifying circuit is used for amplifying the audio signal and then sending the amplified audio signal to the low-frequency wave detecting circuit, the low-frequency wave detecting circuit is used for separating the low-frequency signal from the amplified audio signal, and finally the output circuit is adjusted to set the intensity gain to superpose the low-frequency signal to the original audio signal, so that the bass signal is enhanced and the bass effect is provided for listeners.
Fig. 1 is a schematic structural diagram of a bass enhancement circuit according to an embodiment of the present invention, and as shown in fig. 1, the bass enhancement circuit includes an input circuit 110, a signal amplification circuit 120, a low-frequency detection circuit 130, and a regulation output circuit 140, which are connected in sequence.
The input circuit 110 is connected to an audio signal source, receives an audio signal and sends the audio signal to the signal amplifying circuit 120; the signal amplifying circuit 120 amplifies the audio signal and sends the amplified audio signal to the low-frequency detection circuit 130; the low frequency detection circuit 130 receives the amplified audio signal, separates a low frequency signal from the amplified audio signal, and sends the low frequency signal to the adjustment output circuit 140; the adjustment output circuit 140 adjusts an intensity gain of the low frequency signal, and outputs the low frequency signal superimposed on the original audio signal in accordance with the adjusted intensity gain.
Through the input circuit, the signal amplification circuit, the low-frequency detection circuit and the adjusting output circuit which are connected in sequence, after the audio signal is input, firstly, the signal is amplified, then, the low-frequency detection circuit separates out the low-frequency signal from the amplified audio signal, finally, the adjusting output circuit sets proper intensity gain, and the low-frequency signal is output and superposed to the original audio signal, so that the enhancement of the bass effect is realized, and the shocked bass experience is provided for listeners.
Fig. 2 is a schematic circuit connection diagram of an embodiment of the bass boost circuit of the present invention, and referring to fig. 2, in some embodiments of the present invention, the low frequency detection circuit includes: the RC detection branch circuit comprises a follow transistor Q1 and an output resistor R9.
The input end of the RC detection branch is connected with the signal amplification circuit 120, and the output end of the RC detection branch is connected with the base of the following triode Q1. The collector of the follow transistor Q1 is connected to the power supply VCC, and the emitter is connected to one end of the output resistor R9. The other end of the output resistor R9 is connected to ground. The emitter of the follow transistor Q1 is connected to the connection end of the output resistor R9 to regulate the output circuit 140 and the feedback end of the RC detection branch. The following triode Q1 has the amplification following effect, and when the same output effect is achieved, the base current of Q1 is smaller, namely the current required to be provided by the RC detection branch is smaller, so that the RC detection branch can adopt a larger detection resistor and a smaller detection capacitor to better filter out high-frequency ripple signals, and the cost of the circuit is lower. The output resistor R9 is grounded to provide output, and the connection end of the output resistor R9 and the following triode Q1 is also connected to the feedback end of the RC detection branch circuit, so that the output low-frequency signal is fed back to the RC detection branch circuit, the audio signal is stabilized, and the self-excitation of the circuit is prevented.
In some embodiments of the present invention, the RC detection branch comprises: a detection resistor R4, a detection resistor R3, a detection capacitor C2 and a detection capacitor C1.
One end of a detection resistor R4 is connected with one end of a detection resistor R3 and one end of a detection capacitor C2, the other end of the detection resistor R4 is connected with a signal amplifying circuit, the other end of the detection resistor R3 is connected with one end of a detection capacitor C1, the other end of a detection capacitor C1 is grounded, the connection end of the detection resistor R3 and the detection capacitor C1 is connected with the base of a following triode Q1, the other end of the detection capacitor C2 is connected with the connection end of an output resistor R9 and the emitter of the following triode Q1, namely, the end of the detection capacitor C2 is selected as the feedback end of an RC detection branch.
The structure of the low-frequency detection circuit 130 is preferably determined after simulation, and is composed of a triode and a passive device, so that the low-frequency detection circuit is simple in structural design and low in cost, and can be used for a simulation system. Through the resistance-capacitance cooperation of the detection resistor and the detection capacitor and the following effect of the following triode Q1, a good low-frequency detection effect can be achieved, medium-high frequency components in audio signals are filtered, wherein the detection resistor R4, R3, the detection capacitor C2 and C1 form a second-order RC filter circuit, the output resistor R9 is grounded to provide output, the following triode Q1 achieves the alternating current amplification following effect, low-frequency signals are mainly input to the base of the following triode Q1, the emission of the following triode Q1 is the output end of low-frequency signals, the low-frequency detection circuit 130 is fast in detection processing and small in signal distortion, and therefore the low-frequency detection circuit has good frequency response and high fidelity, stable feedback output and no self-excitation, and lower cost.
In some embodiments of the present invention, regulated output circuit 140 includes: and a slide rheostat RT1, wherein one fixed end of the slide rheostat RT1 is an input end of the regulating output circuit 140 and is connected with the low-frequency detection circuit 130, the other fixed end of the slide rheostat RT1 is grounded, and the slide end of the slide rheostat RT1 is an output end of the regulating output circuit 140.
As shown in fig. 2, fixed end 3 of slide rheostat RT1 is grounded, and fixed end 1 is connected to low frequency detection circuit 130 for receiving low frequency signals. When the sliding terminal 2 slides to the fixed terminal 1, the sliding terminal 2 outputs a signal of the full voltage drop of the sliding rheostat RT1, at this time, the intensity gain of the output low frequency signal BASS BOOST IN is the largest, and on the contrary, when the sliding terminal 2 slides to the fixed terminal 3, which is equivalent to that the sliding terminal 2 is grounded, the output signal is zero. The strength of the output bass signal can be conveniently adjusted by sliding the sliding end 2 of the sliding rheostat RT1, and gain-adjustable output is realized.
In some embodiments of the present invention, as shown in fig. 2, the bass boost circuit further comprises: the coupling capacitor C5 and the coupling capacitor C5 are connected between the low frequency detection circuit 130 and the adjustment output circuit 140, and the coupling capacitor C5 can filter out dc interference, and only allow the separated low frequency signal (ac) to flow into the slide rheostat RT1, thereby reducing signal interference.
In some embodiments of the present invention, input circuit 110 includes: the two input branches with the same structure have the starting ends respectively connected with the left and right channel audio signal sources, and the tail ends commonly connected with the input end of the signal amplifying circuit 120, so that the left and right channel signals are merged and input to the signal amplifying circuit 120.
In some embodiments of the invention, the input branch comprises: the audio signal flows in from the input capacitor, and the dc interference component is filtered out and then output to the signal amplifying circuit 120 through the input resistor. As shown IN fig. 2, the two input branches are respectively composed of an input capacitor C3 and an input resistor R5, and an input capacitor C6 and an input resistor R7, the terminals of the input resistors R5 and R7 are commonly connected to the signal amplification circuit 120, so as to implement the combined input processing of the RIGHT channel input signal RIGHT IN and the LEFT channel input signal LEFT IN, and on this basis, the low-frequency signal output by the bass enhancement circuit is respectively superimposed to the original RIGHT channel and LEFT channel signals, so as to implement the bass enhancement of two channels.
In some embodiments of the present invention, signal amplification circuit 120 comprises: and a bias branch 121 and an amplifying branch 122 (reference numerals refer to the enlarged view in fig. 3) which are connected in sequence, wherein the bias branch 121 is connected with the input circuit 110, and the amplifying branch 122 is connected with the low-frequency detection circuit 130. The bias branch 121 receives the audio signal from the input circuit 110, increases a dc bias voltage to the audio signal, and transmits the audio signal to the amplification branch 122, and the amplification branch 122 amplifies the biased audio signal and transmits the amplified audio signal to the low-frequency detection circuit 130.
Because the input original audio signals comprise positive half-axis signals and negative half-axis signals, the bias circuit 121 firstly increases direct-current bias voltage for the audio signals, so that the audio signals are all stepped to the positive half-axis, the negative half-axis signals cannot be lost during amplification processing of the subsequent amplification branch 122, bass enhancement is accurate, and signal distortion is avoided.
As shown in fig. 2 and 3, the bias branch 121 includes: a DC blocking capacitor C4, an adjusting resistor R6, a bias resistor R8, a pull-up resistor R2 and a triode Q3.
One end of the blocking capacitor C4 and one end of the bias resistor R8 are connected to the base of the transistor Q3, and the connection end is the input end of the bias branch 121 and is connected to the input circuit 110. The other end of the blocking capacitor C4 is connected to one end of the adjusting resistor R6. The other end of the adjusting resistor R6, the other end of the biasing resistor R8 and one end of the pull-up resistor R2 are connected with the collector of the triode Q3, and the connecting end is the output end of the biasing branch 121 and is connected with the amplifying branch 122; the other end of the pull-up resistor R2 is connected to a power supply terminal.
The direct current blocking capacitor C4 and the adjusting resistor R6 form a signal path of an alternating current audio signal, and the signal path is connected between the base electrode and the collector electrode of the triode Q3, so that an alternating current negative feedback effect is realized on the triode Q3, and the audio signal can be better adjusted. The bias resistor R8 and the transistor Q3 form a signal path of a direct current bias voltage signal, and the direct current bias voltage is added to the alternating current audio signal. Therefore, the input alternating current audio signal and the direct current bias voltage are merged and output at the connection end of the transistor Q3 and the pull-up resistor R2.
As shown in fig. 2 and 3, the amplifying branch 122 includes: the low-frequency detector circuit comprises a triode Q2, a pull-up resistor R1 and a feedback resistor R10, wherein the base electrode of the triode Q2 is the input end of an amplification branch and is connected with a bias branch 121, the collector electrode of the triode Q2 is connected with a power supply end through a pull-up resistor R1, the emitter electrode of the triode Q2 is grounded through the feedback resistor R10, and the connecting end of the collector electrode of the triode Q2 and the pull-up resistor R1 is the output end of the amplification branch and is connected with the low-frequency detector circuit 130. Resistor R10 provides ac deep negative feedback to raise the emitter potential of transistor Q2.
Based on the above embodiment, the invention discloses a bass boost circuit composed of passive devices such as a triode, a resistor and a capacitor, which has a simple structure, can be applied to an analog circuit, directly processes analog audio signals without analog-to-digital conversion, saves structures such as an analog-to-digital converter and a digital processing chip compared with a digital processing system based on an Equalizer (EQ), does not need to consider a digital algorithm, and has simple design and low cost.
The invention also discloses an audio playing device which is provided with the bass enhancement circuit shown in any one of the above embodiments, the audio playing device can be an acoustic earphone and the like, the audio playing device is provided with a switch to adjust bass gain, and if the embodiment shown in fig. 2-3 is taken as an example, the switch of the audio playing device is linked with the sliding end 2 of the sliding rheostat RT1, and gain adjustment is realized by sliding the sliding end 2.
While the foregoing is directed to embodiments of the present invention, other modifications and variations of the present invention may be devised by those skilled in the art in light of the above teachings. It should be understood by those skilled in the art that the foregoing detailed description is for the purpose of better explaining the present invention, and the scope of the present invention should be determined by the scope of the appended claims.
Claims (9)
1. A bass boost circuit is characterized by comprising an input circuit, a signal amplification circuit, a low-frequency detection circuit and an adjusting output circuit which are connected in sequence; the input circuit is connected with an audio signal source, receives an audio signal and sends the audio signal to the signal amplifying circuit; the signal amplification circuit amplifies the audio signal and then sends the amplified audio signal to the low-frequency detection circuit; the low-frequency detection circuit receives the amplified audio signal, separates a low-frequency signal from the amplified audio signal and sends the low-frequency signal to the regulation output circuit; the adjusting output circuit adjusts the intensity gain of the low-frequency signal and outputs and superimposes the low-frequency signal to the original audio signal according to the adjusted intensity gain;
the low frequency detection circuit includes: the RC detection branch circuit comprises a follow triode Q1 and an output resistor R9; the input end of the RC detection branch is connected with the signal amplification circuit, and the output end of the RC detection branch is connected with the base electrode of the following triode Q1; the collector of the following triode Q1 is connected with a power supply, and the emitter of the following triode Q1 is connected with one end of the output resistor R9; the other end of the output resistor R9 is grounded; the connection end of the emitter of the following triode Q1 and the output resistor R9 is connected with the feedback ends of the regulation output circuit and the RC detection branch circuit.
2. The bass enhancement circuit of claim 1, wherein the RC detection branch comprises: the detector comprises a detection resistor R4, a detection resistor R3, a detection capacitor C2 and a detection capacitor C1;
the signal amplification circuit is connected to the one end of detection resistance R4 the one end of detection resistance R3 with the one end of detection electric capacity C2, the other end of detection resistance R4 is connected the signal amplification circuit, the other end of detection resistance R3 is connected the one end of detection electric capacity C1, the other end ground connection of detection electric capacity C1, detection resistance R3 with the link of detection electric capacity C1 is connected follow triode Q1's base, the other end of detection electric capacity C2 is connected output resistance R9 with the link of following triode Q1 projecting pole.
3. The bass enhancement circuit of claim 1, wherein the adjustment output circuit comprises: a slide rheostat RT1, wherein one fixed end of the slide rheostat RT1 is the input end of the regulating output circuit and is connected with the low-frequency detection circuit, the other fixed end of the slide rheostat RT1 is grounded, and the slide end of the slide rheostat RT1 is the output end of the regulating output circuit;
the bass boost circuit further comprises: a coupling capacitor C5, the coupling capacitor C5 is connected between the low frequency detection circuit and the regulated output circuit.
4. The bass enhancement circuit of claim 1, wherein the input circuit comprises: the audio amplifier comprises two input branches with the same structure, wherein the starting ends of the two input branches are respectively connected with a left channel audio signal source and a right channel audio signal source, the tail ends of the two input branches are commonly connected with the input end of the signal amplification circuit, and left channel signals and right channel signals are merged and input into the signal amplification circuit.
5. The bass boost circuit of claim 4, wherein the input branch comprises: the audio signal flows in from the input capacitor and is output to the signal amplifying circuit through the input resistor.
6. The bass enhancement circuit of claim 1, wherein the signal amplification circuit comprises: the bias branch circuit and the amplification branch circuit are connected in sequence, the bias branch circuit is connected with the input circuit, and the amplification branch circuit is connected with the low-frequency detection circuit; the bias branch circuit receives the audio signal from the input circuit, adds a direct-current bias voltage to the audio signal and then sends the audio signal to the amplification branch circuit, and the amplification branch circuit amplifies the biased audio signal and sends the amplified audio signal to the low-frequency detection circuit.
7. The bass enhancement circuit of claim 6, wherein the bias branch comprises: the circuit comprises a blocking capacitor C4, an adjusting resistor R6, a bias resistor R8, a pull-up resistor R2 and a triode Q3;
one end of the blocking capacitor C4 and one end of the bias resistor R8 are connected with the base electrode of the triode Q3, and the connection end is the input end of the bias branch and is connected with the input circuit; the other end of the direct current blocking capacitor C4 is connected with one end of the adjusting resistor R6; the other end of the adjusting resistor R6, the other end of the biasing resistor R8 and one end of the pull-up resistor R2 are connected with the collector of the triode Q3, and the connecting end is the output end of the biasing branch and is connected with the amplifying branch; the other end of the pull-up resistor R2 is connected with a power supply end.
8. The bass enhancement circuit of claim 6, wherein the amplification branch comprises: the transistor Q2, a pull-up resistor R1 and a feedback resistor R10, the base of the transistor Q2 is the input end of the amplification branch and is connected with the bias branch, the collector of the transistor Q2 is connected with a power supply end through the pull-up resistor R1, the emitter of the transistor Q2 is grounded through the feedback resistor R10, and the connection end of the collector of the transistor Q2 and the pull-up resistor R1 is the output end of the amplification branch and is connected with the low-frequency detection circuit.
9. Audio playback device, characterized in that it is provided with a bass boost circuit according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810045294.8A CN108235184B (en) | 2018-01-17 | 2018-01-17 | Bass enhancement circuit and audio playing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810045294.8A CN108235184B (en) | 2018-01-17 | 2018-01-17 | Bass enhancement circuit and audio playing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108235184A CN108235184A (en) | 2018-06-29 |
| CN108235184B true CN108235184B (en) | 2020-08-28 |
Family
ID=62642074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810045294.8A Active CN108235184B (en) | 2018-01-17 | 2018-01-17 | Bass enhancement circuit and audio playing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108235184B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798778A (en) * | 2019-10-29 | 2020-02-14 | 深圳市亿联智能有限公司 | Audio equipment and control circuit for left and right channel mixed output thereof |
| CN111970627B (en) * | 2020-08-31 | 2021-12-03 | 广州视源电子科技股份有限公司 | Audio signal enhancement method, device, storage medium and processor |
| CN112992167A (en) * | 2021-02-08 | 2021-06-18 | 歌尔科技有限公司 | Audio signal processing method and device and electronic equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6489708A (en) * | 1987-09-30 | 1989-04-04 | Toshiba Corp | Low boosting circuit |
| JPH11206166A (en) * | 1998-01-07 | 1999-07-30 | Matsushita Electric Ind Co Ltd | Speed controller for motor |
| CN1612469A (en) * | 2003-10-30 | 2005-05-04 | 新日本无线株式会社 | Bass boost circuit |
| CN202077172U (en) * | 2011-05-17 | 2011-12-14 | 泾县祥盛科技有限公司 | Mega bass boosting circuit device |
| CN205793253U (en) * | 2016-07-11 | 2016-12-07 | 东莞正阳电子有限公司 | A kind of enhancing bass sound effect circuit |
| CN106658298A (en) * | 2017-02-21 | 2017-05-10 | 广东欧珀移动通信有限公司 | Bass boost processing circuit and terminal device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4002994A (en) * | 1976-01-26 | 1977-01-11 | Fender C Leo | Tone control circuit |
-
2018
- 2018-01-17 CN CN201810045294.8A patent/CN108235184B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6489708A (en) * | 1987-09-30 | 1989-04-04 | Toshiba Corp | Low boosting circuit |
| JPH11206166A (en) * | 1998-01-07 | 1999-07-30 | Matsushita Electric Ind Co Ltd | Speed controller for motor |
| CN1612469A (en) * | 2003-10-30 | 2005-05-04 | 新日本无线株式会社 | Bass boost circuit |
| CN202077172U (en) * | 2011-05-17 | 2011-12-14 | 泾县祥盛科技有限公司 | Mega bass boosting circuit device |
| CN205793253U (en) * | 2016-07-11 | 2016-12-07 | 东莞正阳电子有限公司 | A kind of enhancing bass sound effect circuit |
| CN106658298A (en) * | 2017-02-21 | 2017-05-10 | 广东欧珀移动通信有限公司 | Bass boost processing circuit and terminal device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108235184A (en) | 2018-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108235184B (en) | Bass enhancement circuit and audio playing equipment | |
| CN103138687A (en) | Distortion inhibition in high level audio frequency amplifying circuit | |
| US3725583A (en) | Volume and tone control for multi-channel audio systems | |
| US20130156226A1 (en) | Volume adjustment circuit with automatic gain control and electronic device using same | |
| CN111490739B (en) | Device and equipment for amplifying audio signal | |
| CN101499783B (en) | Gain automatic regulating circuit and electronic product using the same | |
| EP0054943B2 (en) | Power amplifier for supplying electric power to a load by switching of power supply voltage | |
| US3160824A (en) | Frequency compensated amplifier for magnetic tape playback | |
| US8103021B2 (en) | Audio reproducing apparatus | |
| US20110170716A1 (en) | Methods And Apparatus For Variable Solid State-To-Tube Rectification In An Amplifier | |
| KR101094004B1 (en) | Digital audio amplifiers with a negative feedback of speaker current | |
| CN203596865U (en) | Audio signal high-frequency compensation circuit | |
| US3531596A (en) | Treble and bass control circuit | |
| EP3453112B1 (en) | Single-ended instrumentation folded cascode amplifier | |
| WO2016153387A1 (en) | Sound power amplifier | |
| US9431970B1 (en) | Methods and apparatus for relatively invariant input-output spectral relationship amplifiers | |
| US9467110B1 (en) | Electronic system of a hybrid amplifier | |
| US11121678B1 (en) | Vacuum tube amplification system capable of reducing residual noise and a grounding method thereof | |
| CN204993809U (en) | Dual track audio power amplifier circuit | |
| US10340872B1 (en) | Audio filter device for electronic interference with audio signals | |
| EP2659586A1 (en) | Method for forming an electric signal representing a sound and a device therefor | |
| US2958047A (en) | Amplitude equalizer of speech sound waves | |
| CN107396242B (en) | Audio gain circuit | |
| CN207589130U (en) | A kind of earphone power amplifier | |
| WO1989008970A1 (en) | Induction loop driving amplifiers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |