Multi-sound-source input control circuit and electronic equipment

Abstract

The utility model discloses a multi-sound-source input control circuit, and discloses an electronic device with the multi-sound-source input control circuit. The multi-sound-source input control circuit comprises a first sound source input assembly, a second sound source input assembly, an audio selection chip, a first amplification module, a second amplification module, a balance amplification module, a control chip and a power supply, and the first sound source input assembly is connected with the first input end of the audio selection chip; the second sound source input assembly is connected with the second input end of the audio selection chip and the second amplification module, the control end of the audio selection chip is connected with the control chip, the first amplification module is connected between the audio selection chip and the equalization amplification module, and the second amplification module is further connected with the equalization amplification module. Various different sound source inputs can be provided, and the input audio can be balanced and amplified.

Description

Technical Field

[0001] The utility model relates to the field of audio input control, and particularly relates to a multi-source input control circuit and an electronic device. Background Art

[0002] At present, the audio source input control circuit is mainly a single audio source input control circuit, which can only perform microphone input or audio jack input, and the applicable range is relatively small. If it is necessary to alternately use microphone input and audio jack input, two different circuits need to be adopted, which is very inconvenient. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a multi-source input control circuit and an electronic device, which can provide multiple different audio source inputs and perform equalization amplification on the input audio, thereby improving the user experience.

[0004] The utility model also provides an electronic device with the above multi-source input control circuit.

[0005] The multi-source input control circuit according to the first aspect embodiment of the utility model includes: a first audio source input component, a second audio source input component, an audio selection chip, a first amplification module, a second amplification module, an equalization amplification module, a control chip, and a power supply. The power supply is respectively connected to the first amplification module, the second amplification module, the equalization amplification module, and the control chip. The first audio source input component is connected to the first input end of the audio selection chip. The second audio source input component is respectively connected to the second input end of the audio selection chip and the second amplification module. The control end of the audio selection chip is connected to the control chip. The first amplification module is connected between the audio selection chip and the equalization amplification module. The second amplification module is also connected to the equalization amplification module. The equalization amplification module is connected to the control chip. Wherein, the first audio source input component is a single audio source input, and the second audio source input component is a dual audio source input.

[0006] The multi-source input control circuit according to the embodiment of the utility model has at least the following beneficial effects: By setting the first audio source input component and the second audio source input component, the multi-source input control circuit can be connected to multiple different audio sources. By setting the audio selection chip, the audio signals input by the first audio source input component and the second audio source input component can be selected. Through the first amplification module, the second amplification module, and the equalization amplification module, the audio source signals output by the audio selection chip can be amplified and equalized, so that the audio can be more balanced and natural.

[0007] According to some embodiments of the present utility model, the first amplification module includes a first amplifier, a second amplifier, and an audio adjustment chip. The output end of the audio selection chip is connected to the input end of the first amplifier. The output end of the first amplifier is connected to the input end of the audio adjustment chip. The output end of the audio adjustment chip is connected to the input end of the second amplifier. The output end of the second amplifier is connected to the equalization amplification module.

[0008] According to some embodiments of the present utility model, the second sound source input component includes a first sound source input port and a second sound source input port. The second amplification module includes a third amplifier and a fourth amplifier. The first sound source input port is connected to the input end of the third amplifier. The second sound source input port is connected to the input end of the fourth amplifier. The output ends of the third amplifier and the fourth amplifier are both connected to the equalization amplification module.

[0009] According to some embodiments of the present utility model, the second sound source input component is a two-in-one audio component. The two-in-one audio component includes a third microphone and an audio socket. The third microphone is connected to the second input end of the audio selection chip. The audio socket is respectively connected to the first sound source input port and the second sound source input port.

[0010] According to some embodiments of the present utility model, the equalization amplification module includes an equalization amplification chip. The first input end of the equalization amplification chip is connected to the first amplification module. The second input end of the equalization amplification chip is connected to the second amplification module. The first output end and the second output end of the equalization amplification chip are connected to the control chip. Among them, the first output end of the equalization amplification chip corresponds to the first input end of the equalization amplification chip, and the second output end of the equalization amplification chip corresponds to the second input end of the equalization amplification chip.

[0011] According to some embodiments of the present utility model, the equalization amplification module further includes a first triode and a light-emitting diode. The emitter of the first triode is connected to the power supply. The base of the first triode is connected to the second output end of the equalization amplification chip. The collector of the first triode is connected to the positive end of the light-emitting diode. The negative end of the light-emitting diode is grounded.

[0012] According to some embodiments of the present utility model, the first sound source input component includes a first microphone and a second microphone. The first microphone and the second microphone are both connected to the first input end of the audio selection chip.

[0013] According to some embodiments of the present utility model, the model of the audio adjustment chip is MCP4017T-503E / LT.

[0014] According to some embodiments of the present utility model, the model of the equalization amplification chip is KA22241G-S14-R.

[0015] An electronic device according to an embodiment of the second aspect of the present utility model includes the multi-audio-source input control circuit of the above embodiment.

[0016] The electronic device according to an embodiment of the present utility model has at least the following beneficial effects: By providing a first audio-source input component and a second audio-source input component, the multi-audio-source input control circuit can be connected to a variety of different audio sources. By providing an audio selection chip, the audio signals input by the first audio-source input component and the second audio-source input component can be selected. Through the first amplification module, the second amplification module, and the equalization amplification module, the audio-source signals output by the audio selection chip can be amplified and equalized, so that the audio can be more balanced and natural.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0019] Figure 1 is a schematic diagram of the modules of the multi-audio-source input control circuit according to an embodiment of the present utility model;

[0020] Figure 2 is a schematic diagram of a partial circuit of the multi-audio-source input control circuit according to an embodiment of the present utility model;

[0021] Figure 3 is a schematic diagram of a partial circuit of the multi-audio-source input control circuit according to another embodiment of the present utility model;

[0022] Figure 4 is a schematic diagram of a partial circuit of the multi-audio-source input control circuit according to another embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The embodiments of the present utility model are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0024] In the description of the present utility model, it should be understood that with regard to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0025] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more. Understandings such as "greater than", "less than", "exceeding", etc. do not include the original number, and understandings such as "above", "below", "within", etc. include the original number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0026] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0027] Referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the multi-source input control circuit provided by the embodiment of the present application includes a first sound source input component, a second sound source input component, an audio selection chip U2, a first amplification module, a second amplification module, an equalization amplification module, a control chip, and a power supply. The power supply is respectively connected to the first amplification module, the second amplification module, the equalization amplification module, and the control chip, so that the power supply can provide working current for the first amplification module, the second amplification module, the equalization amplification module, and the control chip. Among them, the first sound source input component is connected to the first input end of the audio selection chip U2, the second sound source input component is respectively connected to the second input end of the audio selection chip U2 and the second amplification module, the control end of the audio selection chip U2 is connected to the control chip, the first amplification module is connected between the audio selection chip U2 and the equalization amplification module, the second amplification module is also connected to the equalization amplification module, and the output end of the equalization amplification module is connected to the control chip.

[0028] It should be noted that by setting the first sound source input component and the second sound source input component, the multi-sound source input control circuit can be connected to a variety of different sound sources. By setting the audio selection chip U2, the audio signals input by the first sound source input component and the second sound source input component can be selected. By connecting the control chip to the control terminal of the audio selection chip U2, the user can adjust the priority of the audio selection chip U2 through the control chip. For example, when the user sets the priority of the audio selection chip U2 to the audio signal input by the second sound source input component being prioritized, when the first sound source input component and the second sound source input component input audio signals simultaneously, the sound source selection chip U2 will input the audio signal of the second sound source input component to the first amplification module. Through the first amplification module, the second amplification module, and the equalization amplification module, the sound source signal output through the audio selection chip U2 can be amplified and equalized, so that the audio can be more balanced and natural.

[0029] It should be noted that the first sound source input component is a single sound source input, and the second sound source input component is a dual sound source input. Among them, the first sound source input component includes the first microphone MK1 and the second microphone MK2, and both the first microphone MK1 and the second microphone MK2 are connected to the first input terminal of the audio selection chip U2. The second sound source input component is a two-in-one audio component, and the two-in-one audio component includes the third microphone MK3 and the audio socket. The third microphone MK3 is connected to the second input terminal of the audio selection chip U2. When the user inputs an audio signal through the third microphone MK3, the audio signal is input to the audio selection chip U2 through the second input terminal; when the user inputs an audio signal through the audio socket, the audio signal is directly amplified by the second amplification module and then output to the equalization amplification module.

[0030] It should be noted that the first amplification module includes the first amplifier IC1A, the second amplifier IC1B, and the audio adjustment chip U1. The output terminal of the audio selection chip U2 is connected to the input terminal of the first amplifier IC1A. The output terminal of the first amplifier IC1A is connected to the input terminal of the audio adjustment chip U1. The output terminal of the audio adjustment chip U1 is connected to the input terminal of the second amplifier IC1B. The output terminal of the second amplifier IC1B is connected to the equalization amplification module. Among them, the model of the audio adjustment chip U1 is MCP4017T-503E / LT.

[0031] It should be noted that the multi-source input control circuit further includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a thirteenth resistor R13, a fourteenth resistor R14, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a tenth capacitor C10, and an eleventh capacitor C11. The first microphone MK1 is respectively connected to one end of the first resistor R1 and the first input terminal of the audio selection chip U2. One end of the second resistor R2 is connected to the other end of the first resistor R1, and the other end of the second resistor R2 is connected to the power supply. One end of the first capacitor C1 is connected between the first resistor R1 and the second resistor R2, and the other end of the first capacitor C1 is grounded. The second microphone MK2 is connected to the first input terminal of the audio selection chip U2. The third resistor R3 is connected between the second microphone MK2 and the second capacitor C2. The output terminal of the audio selection chip U2 is connected between the third resistor R3 and the second capacitor C2. The fifth resistor R5 is connected between the control terminal C_VOICE_SEL of the audio selection chip U2 and the control module. The fourth resistor R4 is connected between the second capacitor C2 and the second terminal of the first amplifier IC1A. One end of the fourth capacitor C4 is connected between the fourth resistor R4 and the second terminal of the first amplifier IC1A, and the other end of the fourth capacitor C4 is grounded. The eighth resistor R8 is respectively connected to the first terminal and the second terminal of the first amplifier IC1A. The sixth capacitor C6 is connected in parallel with the eighth resistor R8. The seventh capacitor C7 is connected between the ninth resistor R9 and the first terminal of the first amplifier IC1A. The ninth resistor R9 is connected between the seventh capacitor C7 and the input terminal of the audio adjustment chip U1. The output terminal of the audio adjustment chip U1 is connected to the sixth terminal of the second amplifier IC1B. A tenth resistor R10 is also connected between the input terminal and the output terminal of the audio adjustment chip U1. The thirteenth resistor R13 is respectively connected to the sixth terminal and the seventh terminal of the second amplifier IC1B. The tenth capacitor C10 is connected in parallel with the thirteenth resistor R13. An eleventh capacitor C11 and a fourteenth resistor R14 are connected between the second amplifier IC1B and the first input terminal of the equalization amplifier chip U3. One end of the fifth capacitor C5 is respectively connected to one end of the sixth resistor R6, one end of the seventh resistor R7, the third terminal of the first amplifier IC1A, and the fifth terminal of the second amplifier IC1B. The other end of the sixth resistor R6 is connected to the power supply. The other ends of the seventh resistor R7 and the fifth capacitor C5 are both grounded. Among them, the connection port of the power supply is VCC.

[0032] It should be noted that the second sound source input component includes a first sound source input port and a second sound source input port. The second amplification module includes a third amplifier IC2B and a fourth amplifier IC2A. The first sound source input port is connected to the input end of the third amplifier IC2B, the second sound source input port is connected to the input end of the fourth amplifier IC2A, and the output ends of the third amplifier IC2B and the fourth amplifier IC2A are both connected to the second input end of the equalization and amplification chip U3.

[0033] It should be noted that the multi-source input control circuit further includes a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, a thirty-second resistor R32, a thirty-third resistor R33, a thirty-fourth resistor R34, a thirty-fifth resistor R35, a thirty-sixth resistor R36, a thirty-seventh resistor R37, a thirty-eighth resistor R38, a thirty-ninth resistor R39, a fortieth resistor R40, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a nineteenth capacitor C19, a twentieth capacitor C20, a twenty-first capacitor C21, and a thirtieth capacitor C30. The third microphone MK3 is respectively connected to one end of the sixteenth resistor R16 and one end of the seventeenth resistor R17. The other end of the seventeenth resistor R17 is respectively connected to the second input terminal of the audio selection chip U2 and one end of the fifteenth resistor R15. The other end of the fifteenth resistor R15 is respectively connected to one end of the twelfth capacitor C12 and one end of the eighteenth resistor R18. The other end of the twelfth capacitor C12 is grounded. The other end of the eighteenth resistor R18 is connected to the power supply. The first sound source input port is disposed between the thirteenth capacitor C13 and the twenty-first resistor R21. The second sound source input port is disposed between the thirtieth capacitor C30 and the twenty-second resistor R22. A thirty-fourth resistor R34 and a thirty-fifth resistor R35 are connected between the thirteenth capacitor C13 and the third terminal of the third amplifier IC2B. One end of the fifteenth capacitor C15 is connected between the thirty-fifth resistor R35 and the third terminal of the third amplifier IC2B. The other end of the fifteenth capacitor C15 is grounded. One end of the sixteenth capacitor C16 is connected between the thirty-fourth resistor R34 and the thirty-fifth resistor R35. The other end of the sixteenth capacitor C16 is connected to the first terminal of the third amplifier IC2B. The thirty-seventh resistor R37 is respectively connected to the second terminal and the first terminal of the third amplifier IC2B. One end of the thirty-sixth resistor R36 is connected to the second terminal of the third amplifier IC2B and the thirty-seventh resistor R37. The other end of the thirty-sixth resistor R36 is grounded. One end of the seventeenth capacitor C17 is connected to the thirty-eighth resistor R38. The thirty-eighth resistor R38 is located between the third amplifier IC2B and the seventeenth capacitor C17. The other end of the seventeenth capacitor C17 is respectively connected to one end of the twenty-first capacitor C21, one end of the fortieth resistor R40, and one end of the thirty-ninth resistor R39. The other end of the thirty-ninth resistor R39 is connected to the second input terminal of the equalization amplifier chip U3. The other end of the twenty-first capacitor C21 is connected to the thirty-third resistor R33.The other end of the thirty-third resistor R33 is respectively connected to one end of the thirty-second resistor R32, the seventh end of the fourth amplifier IC2A, and one end of the twentieth capacitor C20. One end of the thirty-first resistor R31 is connected to the sixth end of the fourth amplifier IC2A and the thirty-second resistor R32. The other end of the thirty-first resistor R31 is grounded. The twenty-ninth resistor R29 and the thirtieth resistor R30 are connected in series between the fifth end of the fourth amplifier IC2A and the thirtieth capacitor C30. One end of the twentieth capacitor C20 is connected between the twenty-ninth resistor R29 and the thirtieth resistor R30. The other end of the twentieth capacitor C20 is connected to the seventh end of the fourth amplifier IC2A. One end of the nineteenth capacitor C19 is connected between the fourth amplifier IC2A and the thirtieth resistor R30. The other end of the nineteenth capacitor C19 is grounded. One end of the twenty-fifth resistor R25 is connected between the thirtieth capacitor C30 and the twenty-ninth resistor R29. The other end of the twenty-fifth resistor R25 is respectively connected to one end of the eighteenth capacitor C18, one end of the twenty-fourth resistor R24, and one end of the twenty-third resistor R23. The other end of the twenty-third resistor R23 is connected to the power supply. The other ends of the twenty-fourth resistor R24 and the eighteenth capacitor C18 are both grounded. One end of the twenty-eighth resistor R28 is connected between the thirteenth capacitor C13 and the thirty-fourth resistor R34. The other end of the twenty-eighth resistor R28 is respectively connected to one end of the fourteenth capacitor C14, one end of the twenty-sixth resistor R26, and one end of the twenty-seventh resistor R27. The other end of the twenty-seventh resistor R27 is connected to the power supply. The other ends of the twenty-sixth resistor R26 and the fourteenth capacitor C14 are both grounded.,

[0034] It should be noted that the audio socket is respectively connected to the first sound source input port and the second sound source input port.

[0035] It should be noted that the equalization amplification module includes an equalization amplification chip U3. The first input end of the equalization amplification chip U3 is connected to the first amplification module. The second input end of the equalization amplification chip U3 is connected to the second amplification module. The first output end and the second output end of the equalization amplification chip U3 are connected to the control chip. Among them, the first output end of the equalization amplification chip U3 corresponds to the first input end of the equalization amplification chip U3, and the second output end of the equalization amplification chip U3 corresponds to the second input end of the equalization amplification chip U3. Among them, the model of the equalization amplification chip U3 is KA22241 G-S14-R.

[0036] It should be noted that the equalization amplification module further includes a first triode Q1, a light-emitting diode LED1, a forty-first resistor R41, a forty-second resistor R42, a forty-third resistor R43, a forty-fourth resistor R44, a forty-fifth resistor R45, a forty-sixth resistor R46, a twenty-second capacitor C22, and a twenty-third capacitor C23. The first output terminal of the equalization amplification chip U3 is connected to one end of the twenty-third capacitor C23. The other end of the twenty-third capacitor C23 is respectively connected to the C_VOI CE_ADC of the control chip, the forty-first resistor R41, and the forty-second resistor R42. The second output terminal of the equalization amplification chip U3 is respectively connected to one end of the twenty-second capacitor C22 and the forty-fifth resistor R45. The other end of the twenty-second capacitor C22 is respectively connected to the C_MUS I C_ADC of the control chip, the forty-third resistor R43, and the forty-fourth resistor R44. The other end of the forty-fifth resistor R45 is connected to the base of the first triode Q1. The emitter of the first triode Q1 is connected to the power supply. The collector of the first triode Q1 is connected to the positive terminal of the light-emitting diode LED1. The negative terminal of the light-emitting diode LED1 is connected to one end of the forty-sixth resistor R46. The other end of the forty-sixth resistor R46 is grounded.

[0037] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A multi - sound - source input control circuit, characterized in that, Comprising: A first sound source input component, a second sound source input component, an audio selection chip, a first amplification module, a second amplification module, an equalization amplification module, a control chip, and a power supply. The power supply is respectively connected to the first amplification module, the second amplification module, the equalization amplification module, and the control chip. The first sound source input component is connected to the first input end of the audio selection chip. The second sound source input component is respectively connected to the second input end of the audio selection chip and the second amplification module. The control end of the audio selection chip is connected to the control chip. The first amplification module is connected between the audio selection chip and the equalization amplification module. The second amplification module is also connected to the equalization amplification module. The equalization amplification module is connected to the control chip. Among them, the first sound source input component is a single sound source input, and the second sound source input component is a dual sound source input.

2. The multi-audio-source input control circuit according to claim 1, wherein The first amplification module includes a first amplifier, a second amplifier, and an audio adjustment chip. The output end of the audio selection chip is connected to the input end of the first amplifier. The output end of the first amplifier is connected to the input end of the audio adjustment chip. The output end of the audio adjustment chip is connected to the input end of the second amplifier. The output end of the second amplifier is connected to the equalization amplification module.

3. The multi-audio-source input control circuit according to claim 1, wherein The second sound source input component includes a first sound source input port and a second sound source input port. The second amplification module includes a third amplifier and a fourth amplifier. The first sound source input port is connected to the input end of the third amplifier. The second sound source input port is connected to the input end of the fourth amplifier. The output ends of the third amplifier and the fourth amplifier are both connected to the equalization amplification module.

4. The multi-audio-source input control circuit according to claim 3, wherein The second sound source input component is a two-in-one audio component. The two-in-one audio component includes a third microphone and an audio socket. The third microphone is connected to the second input end of the audio selection chip. The audio socket is respectively connected to the first sound source input port and the second sound source input port.

5. The multi-audio-source input control circuit according to claim 1, wherein The equalization amplification module includes an equalization amplification chip. The first input end of the equalization amplification chip is connected to the first amplification module. The second input end of the equalization amplification chip is connected to the second amplification module. The first output end and the second output end of the equalization amplification chip are connected to the control chip. Among them, the first output end of the equalization amplification chip corresponds to the first input end of the equalization amplification chip, and the second output end of the equalization amplification chip corresponds to the second input end of the equalization amplification chip.

6. The multi-audio-source input control circuit according to claim 5, wherein The equalization amplification module further includes a first triode and a light-emitting diode. The emitter of the first triode is connected to the power supply. The base of the first triode is connected to the second output end of the equalization amplification chip. The collector of the first triode is connected to the positive terminal of the light-emitting diode. The negative terminal of the light-emitting diode is grounded.

7. The multi-audio-source input control circuit according to claim 1, wherein The first sound source input component includes a first microphone and a second microphone, and both the first microphone and the second microphone are connected to the first input end of the audio selection chip.

8. The multi-audio-source input control circuit according to claim 2, wherein The model of the audio adjustment chip is MCP4017T-503E / LT.

9. The multi-audio-source input control circuit according to claim 5, wherein The model of the equalization amplification chip is KA22241G-S14-R.

10. An electronic device, characterized in that, It includes the multi-sound source input control circuit according to any one of claims 1 to 9 above.

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