CN219041961U - Amplifying circuit and audio equipment - Google Patents
Amplifying circuit and audio equipment Download PDFInfo
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- CN219041961U CN219041961U CN202223154820.5U CN202223154820U CN219041961U CN 219041961 U CN219041961 U CN 219041961U CN 202223154820 U CN202223154820 U CN 202223154820U CN 219041961 U CN219041961 U CN 219041961U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model discloses an amplifying circuit and audio equipment, which comprises an amplifying module, an input module for inputting audio signals and an output module for outputting the audio signals amplified by the amplifying module, wherein the amplifying module comprises a power supply, a first PNP triode, a first NPN triode, a first capacitor and a potentiometer for adjusting input current of the first PNP triode and the first NPN triode, an emitter of the first PNP triode is connected with a positive electrode of the power supply, a base electrode of the first PNP triode is connected with the input module, a collector of the first PNP triode is connected with a base electrode of the first NPN triode, a first capacitor is connected with a base electrode and an emitter of the first PNP triode respectively, a collector of the first NPN triode is connected with a positive electrode of the power supply, and an emitter of the first NPN triode is connected with the output module.
Description
Technical Field
The present utility model relates to the field of amplifying circuits, and in particular, to an amplifying circuit and an audio device.
Background
With the development of the era, the requirements of users on audio devices are continuously improved, the types of the requirements of the users on the audio devices are also developed towards diversification, and the requirements of the users on the circuits of the devices are further improved as the devices are required to have more professional and better audio processing capabilities instead of simply processing the audio according to the natural modes.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the amplifying circuit and the audio equipment, which can improve the stability of the amplifying circuit and improve the sound resolution.
The utility model also provides audio equipment with the amplifying circuit.
According to the embodiment of the first aspect of the utility model, the amplifying circuit comprises an amplifying module, an input module for inputting an audio signal and an output module for outputting the audio signal amplified by the amplifying module, wherein the amplifying module comprises a power supply, a first PNP triode, a first NPN triode, a first capacitor and a potentiometer for adjusting input current of the first PNP triode and the first NPN triode, an emitter of the first PNP triode is connected with a positive electrode of the power supply, a base of the first PNP triode is connected with the input module, a collector of the first PNP triode is connected with a base of the first NPN triode, the first capacitor is respectively connected with the base and an emitter of the first PNP triode, a collector of the first NPN triode is connected with a positive electrode of the power supply, and an emitter of the first NPN triode is connected with the output module.
The amplifying circuit provided by the embodiment of the utility model has at least the following beneficial effects: the first PNP triode and the second NPN triode amplify the audio signal input by the input module, and the base electrode and the collector electrode of the first PNP triode are connected with the first capacitor, so that the stabilizing effect of the amplifying circuit can be effectively improved, the input currents of the first PNP triode and the first NPN triode can be adjusted by adjusting the potentiometer, and the amplifying effect of the amplifying module is further changed.
According to some embodiments of the utility model, the amplifying module further comprises a second PNP transistor, a second NPN transistor, and a second capacitor, wherein an emitter of the second PNP transistor is connected to the positive power supply, a base of the second PNP transistor is connected to the input module, a collector of the second PNP transistor is connected to the base of the second NPN transistor, the second capacitor is connected to the base and the emitter of the second PNP transistor, respectively, a collector of the second NPN transistor is connected to the positive power supply, and an emitter of the second NPN transistor is connected to the output module.
According to some embodiments of the utility model, the input module includes a first input terminal connected to the base of the first PNP transistor and a second input terminal connected to the base of the second PNP transistor.
According to some embodiments of the utility model, the output module further comprises an operational amplifier, the operational amplifier comprises a third input terminal and a fourth input terminal, the third input terminal is respectively connected with the emitter of the first NPN triode and the collector of the second PNP triode, and the fourth input terminal is respectively connected with the collector of the first PNP triode and the emitter of the second NPN triode.
According to some embodiments of the utility model, the input module further includes a plurality of filtering branches, the filtering branches include a third capacitor and a first resistor, one end of the third capacitor is connected to one end of the first resistor, the other end of the third capacitor is grounded, and the other end of the first resistor is grounded.
According to some embodiments of the utility model, the filtering branch is connected between the first input terminal and the base of the first PNP transistor, and the filtering branch is connected between the second input terminal and the base of the second PNP transistor.
According to some embodiments of the utility model, the amplifying module further includes a fourth capacitor, one end of the fourth capacitor is connected to the potentiometer, and the other end of the fourth capacitor is connected to the collector of the second NPN triode.
According to some embodiments of the utility model, a fifth capacitor is further disposed between the first input terminal and the base of the first PNP transistor, and a sixth capacitor is further disposed between the second input terminal and the base of the second PNP transistor.
According to some embodiments of the utility model, the input module further comprises a ground terminal.
An audio device according to an embodiment of the second aspect of the present utility model comprises an amplifying circuit of any of the embodiments described above.
The audio device according to the embodiment of the utility model has at least the following beneficial effects: the audio equipment adopts an amplifying circuit, wherein a first PNP triode and a second NPN triode amplify audio signals input by the input module, and a base electrode and a collector electrode of the first PNP triode are connected with a first capacitor, so that the stabilizing effect of the amplifying circuit can be effectively improved, the input currents of the first PNP triode and the first NPN triode can be adjusted by adjusting a potentiometer, and the amplifying effect of the amplifying module is further changed.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The utility model is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of an amplifying circuit according to an embodiment of the present utility model;
fig. 2 is a circuit diagram of an amplifying circuit according to an embodiment of the present utility model.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 and 2, the amplifying circuit of the present utility model includes an amplifying module 200, an input module 100 for inputting an audio signal, and an output module 300 for outputting the audio signal amplified by the amplifying module 200, where the amplifying module 200 includes a 15V power supply, a potentiometer R1, a first capacitor C1, a first PNP triode Q1, and a first NPN triode Q2, an emitter of the first PNP triode Q1 is connected to an anode of the 15V power supply, a collector of the first NPN triode Q2 is connected to an anode of the 15V power supply, a base of the first PNP triode Q1 is connected to the input module 100, a base of the first NPN triode Q2 is connected to a collector of the first PNP triode Q1, an emitter of the first NPN triode Q2 is connected to the output module 300, the input current of the first NPN triode Q1 and the first NPN triode Q2 can be adjusted by the potentiometer R1, and thus an amplifying effect of the amplifying module 200 is changed, the first capacitor C1 is connected to the base and the emitter of the first PNP triode Q1, respectively, and a stabilizing effect of the amplifying circuit can be effectively improved.
It may be appreciated that the amplifying module 200 further includes a second PNP transistor Q3, a second NPN transistor Q4, and a second capacitor C2, where an emitter of the second PNP transistor Q3 is connected to the positive electrode of the 15V power supply, a base of the second PNP transistor Q3 is connected to the input module 100, an emitter of the second PNP transistor Q3 is connected to the base of the second NPN transistor Q4, a collector of the second NPN transistor Q4 is connected to the positive electrode of the 15V power supply, an emitter of the second NPN transistor Q4 is connected to the output module 300, and the second capacitor C2 is connected to the base and the emitter of the second PNP transistor Q3 respectively, so as to improve the stability of the amplifying circuit.
It is to be understood that the first end of the potentiometer R1 is connected to the emitter of the first PNP transistor Q1 and the collector of the first NPN transistor Q2, the second end of the potentiometer 11 is connected to the collector of the second NPN transistor Q4, and the sliding end of the potentiometer R1 is connected between the emitter of the first PNP transistor Q1 and the collector of the first NPN transistor Q2 and the first end of the potentiometer R1.
It can be understood that a fourteenth resistor R15 is further connected between the second end of the potentiometer R1 and the emitter of the first PNP transistor Q1 and the collector of the first NPN transistor Q2.
It can be understood that the first PNP transistor Q1, the first NPN transistor Q2, the second PNP transistor Q3, and the second NPN transistor Q4 form a differential circuit, and amplify the signal input by the input module 100.
It can be understood that the amplifying module 200 further includes a second resistor R3 and a third resistor R4, wherein one end of the second resistor R3 is connected to the positive electrode of the 15V power supply, and the other end of the second resistor R3 is connected to the emitter of the first PNP triode Q1 and the collector of the first NPN triode Q2 respectively; one section of the third resistor R4 is connected with the positive electrode of the 15V power supply, and the other end of the third resistor R4 is respectively connected with the emitter of the second PNP triode Q3 and the collector of the second NPN triode Q4.
It will be appreciated that the input module 100 includes a first input terminal and a second input terminal, the first input terminal is connected to the base of the first PNP transistor Q1, the second input terminal is connected to the base of the second PNP transistor Q3, the first audio signal enters the first PNP transistor Q1 through the first input terminal for signal amplification, and the second audio signal enters the second PNP transistor Q3 through the second input terminal for signal amplification.
It will be appreciated that the input module 100 also includes a ground terminal to avoid current interference with the input audio signals at the first and second inputs.
It can be understood that the output module 300 includes an operational amplifier IC1A, the operational amplifier IC1A further includes a third input terminal and a fourth input terminal, the emitter of the first NPN triode Q2 is connected to the third input terminal, the collector of the second PNP triode Q3 is connected to the third input terminal, the collector of the first PNP triode Q1 is connected to the fourth input terminal, the emitter of the second NPN triode Q4 is connected to the fourth input terminal, and the signal amplified by the amplifying module 200 is input to the operational amplifier IC1A through the third input terminal and the fourth input terminal for operational amplification.
It can be understood that the amplifying module 200 further includes a fourth resistor R5, a fifth resistor R6, a sixth resistor R7, a seventh resistor R8, a first diode D1, and a second diode D2, wherein one end of the fourth resistor R5 is connected to the base of the first NPN triode Q2, and the other end of the fourth resistor R5 is connected to the fourth input terminal; one end of a fifth resistor R6 is connected with the base electrode of the second NPN triode Q4, and the other end of the fifth resistor R6 is connected with the third input end; one end of a sixth resistor R7 is connected with the third input end, and the other end of the sixth resistor R7 is connected with the negative electrode of the 15V power supply; one end of a seventh resistor R8 is connected with the fourth input end, and the other end of the seventh resistor R8 is connected with the negative electrode of the 15V power supply; the negative terminal of the first diode D1 is connected with the fourth input terminal, and the positive terminal of the first diode D1 is connected with the negative electrode of the 15V power supply; the negative terminal of the second diode D2 is connected to the third input terminal, and the positive terminal of the second diode D2 is connected to the negative 15V power supply.
It is understood that the output module 300 further includes an eighth resistor R9, one end of the eighth resistor R9 is connected to the fourth input terminal, and the other end of the eighth resistor R9 is grounded to offset the influence of the bias current.
It is understood that the operational amplifier IC1A further includes an output terminal through which the audio signal after the operational amplification is output to an external device.
It is understood that a ninth resistor R10 is further connected between the third input terminal and the output terminal, and a seventh capacitor C7 is further connected between the output terminal and the external device.
It can be understood that the input module 100 further includes a filtering branch, the filtering branch includes a third capacitor C3 and a first resistor R2, one end of the third capacitor C3 is connected to one end of the first resistor R2, the other end of the third capacitor C3 is grounded, and the other end of the first resistor R2 is grounded, so that clutter in the input module 100 can be effectively filtered through the filtering branch.
It can be appreciated that the filtering branch is provided with two filtering branches, namely a first filtering branch and a second filtering branch, the first filtering branch is connected between the first input end and the base electrode of the first PNP triode Q1, the second filtering branch is connected between the second input end and the base electrode of the second PNP triode Q3, and clutter in the first input end and the second input end can be effectively filtered through the filtering branch arranged on the first input end and the second input end.
It can be appreciated that the amplifying module 200 further includes a fourth capacitor C4, one end of the fourth capacitor C4 is connected to the second end of the potentiometer R1, and the other end of the fourth capacitor C4 is connected to the collector of the second NPN triode Q4.
It can be understood that a fifth capacitor C5 is further disposed between the first input terminal and the base of the first PNP transistor Q1, and a sixth capacitor C6 is further disposed between the second input terminal and the base of the second PNP transistor Q3, so that the dc current at the first input terminal and the second input terminal can be effectively filtered through the fifth capacitor C5 and the sixth capacitor C6.
It can be understood that the input module 100 further includes a tenth resistor R11, an eleventh resistor R12, a twelfth resistor R13, a thirteenth resistor R14, and a 48V power supply, where one end of the tenth resistor R11 is connected to the first input terminal, and the other end of the tenth resistor R11 is connected to the fifth capacitor; one end of the eleventh resistor R12 is connected with the second input end, and the other end of the eleventh resistor R12 is connected with the sixth capacitor; one end of the twelfth resistor R13 is connected with the positive electrode of the 48V power supply, and the other end of the twelfth resistor R13 is connected between the tenth resistor R11 and the fifth capacitor C5; one end of the thirteenth resistor R14 is connected to the positive electrode of the 48V power supply, and the other end of the thirteenth resistor R14 is connected between the eleventh resistor R12 and the sixth capacitor C6.
It will be appreciated that an eighth capacitor C8 is also provided between the first input and the second input.
It will be appreciated by those skilled in the art that the specific values of the above circuit components may be determined according to actual requirements and are not limited herein.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (10)
1. The amplifying circuit is characterized by comprising an amplifying module, an input module and an output module, wherein the input module is used for inputting audio signals, the output module is used for outputting the audio signals amplified by the amplifying module, the amplifying module comprises a power supply, a first PNP triode, a first NPN triode, a first capacitor and a potentiometer, the potentiometer is used for adjusting input current of the first PNP triode and the first NPN triode, an emitter of the first PNP triode is connected with a positive electrode of the power supply, a base of the first PNP triode is connected with the input module, a collector of the first PNP triode is connected with a base of the first NPN triode, the first capacitor is connected with the base and an emitter of the first PNP triode respectively, a collector of the first NPN triode is connected with a positive electrode of the power supply, and an emitter of the first NPN triode is connected with the output module.
2. The amplifying circuit according to claim 1, wherein the amplifying module further comprises a second PNP transistor, a second NPN transistor, and a second capacitor, wherein an emitter of the second PNP transistor is connected to the positive power supply, a base of the second PNP transistor is connected to the input module, a collector of the second PNP transistor is connected to the base of the second NPN transistor, the second capacitor is connected to the base and the emitter of the second PNP transistor, respectively, a collector of the second NPN transistor is connected to the positive power supply, and an emitter of the second NPN transistor is connected to the output module.
3. The amplifying circuit according to claim 2, wherein the input module comprises a first input terminal and a second input terminal, the first input terminal being connected to the base of the first PNP transistor, the second input terminal being connected to the base of the second PNP transistor.
4. The amplifying circuit according to claim 2, wherein the output module further comprises an operational amplifier, the operational amplifier comprising a third input terminal and a fourth input terminal, the third input terminal being connected to the emitter of the first NPN transistor and the collector of the second PNP transistor, respectively, and the fourth input terminal being connected to the collector of the first PNP transistor and the emitter of the second NPN transistor, respectively.
5. The amplifying circuit according to claim 3, wherein the input module further comprises a plurality of filtering branches, the filtering branches comprise a third capacitor and a first resistor, one end of the third capacitor is connected with one end of the first resistor, the other end of the third capacitor is grounded, and the other end of the first resistor is grounded.
6. The amplifying circuit according to claim 5, wherein the filtering branch is connected between the first input terminal and the base of the first PNP transistor, and the filtering branch is connected between the second input terminal and the base of the second PNP transistor.
7. The amplifying circuit according to claim 2, wherein the amplifying module further comprises a fourth capacitor, one end of the fourth capacitor is connected to the potentiometer, and the other end of the fourth capacitor is connected to the collector of the second NPN triode.
8. The amplifying circuit according to claim 3, wherein a fifth capacitor is further disposed between the first input terminal and the base of the first PNP transistor, and a sixth capacitor is further disposed between the second input terminal and the base of the second PNP transistor.
9. The amplifying circuit according to claim 1, wherein the input module further comprises a ground terminal.
10. An audio device comprising an amplifying circuit according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223154820.5U CN219041961U (en) | 2022-11-25 | 2022-11-25 | Amplifying circuit and audio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223154820.5U CN219041961U (en) | 2022-11-25 | 2022-11-25 | Amplifying circuit and audio equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219041961U true CN219041961U (en) | 2023-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223154820.5U Active CN219041961U (en) | 2022-11-25 | 2022-11-25 | Amplifying circuit and audio equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219041961U (en) |
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- 2022-11-25 CN CN202223154820.5U patent/CN219041961U/en active Active
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