A pop noise eliminating switching circuit, electronic device and method of use

Abstract

The application discloses a switch circuit for eliminating popping sound, an electronic device and a use method. The switch circuit is applied to the electronic device and comprises an input module, a power supply module, an adjusting module and a noise eliminating module. The input module is used for receiving a first signal from a working state of the electronic device. The power supply module is used for providing a second signal to the adjusting module or the noise eliminating module. The adjusting module is used for converting a third signal based on the first signal or the second signal and maintaining stability of a circuit where the power supply module and the noise eliminating module are located, so as to reduce mutual interference. The noise eliminating module is used for leading the popping sound into a signal ground according to the third signal. An output module is used for normally playing an audio stream. The circuit has simple structure, common electronic components are used for circuit design, the use cost is low, and the popping sound generated in the use process can be effectively eliminated.

Description

Technical Field

[0001] This application relates to the field of electronic circuits, and in particular to a switching circuit, electronic device, and method of using for eliminating popping sounds. Background Technology

[0002] Since the domestically produced Hygon platform lacks an HAD interface, it uses a USB interface to connect the audio codec. The front-panel audio output was tested under the UOS system. Testers discovered that the device produced popping sounds during power-on / power-off / standby / sleep / restart operations, which were then played back through the playback device.

[0003] In today's consumer market, the audio experience is receiving increasing attention. Popping sounds, considered noise, can be unacceptable to some discerning users. Therefore, it is necessary to research and develop a low-cost, simple, and highly reliable solution to effectively address popping sounds. Summary of the Invention

[0004] The purpose of this application is to provide a switching circuit, electronic device, and method for eliminating popping sounds, which can effectively solve the problem of popping sounds generated during use.

[0005] A switching circuit for eliminating popping sounds, applied to an electronic device, includes: an input module for receiving a first signal from the operating state of the electronic device;

[0006] The power supply module is used to provide a second signal to the regulation module or the noise cancellation module.

[0007] The adjustment module converts the first signal or the second signal into a third signal and maintains the stability of the circuit where the power supply module and the noise cancellation module are located, thereby reducing mutual interference.

[0008] The noise cancellation module is used to guide the plosive sound to the signal ground according to the third signal;

[0009] The output module is used for normal playback of the audio stream;

[0010] The input module is connected to the noise cancellation module through the adjustment module, and the noise cancellation module is connected to the output module; the power supply module is connected to both the adjustment module and the noise cancellation module.

[0011] As an optional embodiment, the input module includes a first sub-circuit, the first sub-circuit including a first input terminal, the first input terminal being used to receive a first signal from the operating state of the electronic device;

[0012] The first switching unit changes its operating state according to the level signal of the first input terminal, and determines the level signal to be transmitted based on its operating state.

[0013] As an optional embodiment, the input module further includes a second sub-circuit, which includes a second input terminal and a second switching unit.

[0014] As an optional embodiment, the power module includes a first power terminal for providing a second signal to the adjustment module when the input module is in the off state;

[0015] The second power supply terminal is used to provide a second signal to the noise cancellation module when the adjustment module is in the off state.

[0016] As an optional embodiment, the adjustment module includes a third switch unit that changes its operating state according to the first signal or the second signal, and determines the transmitted third signal based on its operating state.

[0017] As an optional embodiment, the noise cancellation module includes a fourth switching unit that changes its operating state according to a third signal and provides input level signals to the fifth and sixth switching units.

[0018] The fifth or sixth switching unit is used to guide the plosive sound to the signal ground according to the received level signal.

[0019] As an optional embodiment, the output module includes a first output terminal and a second output terminal, used to play the audio stream normally.

[0020] As an optional embodiment, the first input terminal is connected to the controller, and the second input terminal is connected to the audio codec, thereby obtaining a signal indicating the operating status of the electronic device.

[0021] An electronic device includes a controller and a processor, and also includes an audio codec connected to a device interface for connecting to a playback device, the other end of which is connected to the audio codec via audio firmware;

[0022] The controller and the audio codec are respectively connected to the aforementioned switching circuit, which is used to disconnect or enable the transmission of HP_L and HP_R signals through the playback device.

[0023] A method of use, applied to the aforementioned electronic device, includes the following steps:

[0024] S1, the first operation to change the working state of the electronic device;

[0025] S2. The controller or audio codec transmits a level signal to the switching circuit according to the first operation, and the level signal is transmitted and converted by the switching circuit.

[0026] S3. Turn off or turn on the HP_L and HP_R signals according to the level signal converted by the switching circuit.

[0027] The beneficial effects of the embodiments of this application are as follows:

[0028] The circuit structure of this invention is simple, and it uses common electronic components for circuit design. Not only is the cost low, but it can also effectively eliminate popping sounds generated during use. The switching circuit works in conjunction with the controller firmware or audio codec firmware, which ensures high reliability and can eliminate popping sounds within the set time points, thereby improving the user experience and achieving good results. Attached Figure Description

[0029] Figure 1 The circuit for eliminating popping sounds in this application Figure 1 ;

[0030] Figure 2 The circuit for eliminating popping sounds in this application Figure 2 ;

[0031] Figure 3 This is a structural block diagram of the electronic device in this application.

[0032] Figure label:

[0033] Depop1, First Input Terminal; Depop2, Second Input Terminal; PQ47, First Switching Unit; PQ48, Second Switching Unit; PQ49, Third Switching Unit; PQ50, Fourth Switching Unit; Q9, Fifth Switching Unit; Q11, Sixth Switching Unit; S0, First Power Supply Terminal; S5, Second Power Supply Terminal; PC, Capacitor;

[0034] R46, first resistor; R124, second resistor; R14, third resistor; R61, fourth resistor; R77, fifth resistor; R123, sixth resistor; R130, seventh resistor; R135, eighth resistor; R146, ninth resistor; R147, tenth resistor;

[0035] 100. Processor; 200. Controller; 300. Audio codec; 400. Switching circuit; 500. Device interface; 600. Audio firmware;

[0036] A. Input module; B. Power supply module; C. Adjustment module; D. Noise cancellation module; E. Output module. Detailed Implementation

[0037] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0038] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this application will be apparent to those skilled in the art.

[0039] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0040] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0041] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application.

[0042] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0043] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0044] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0045] One of the objectives of this application is to provide a switching circuit 400 for eliminating popping sounds, which is applied to electronic devices.

[0046] like Figures 1-2 As shown, the switching circuit 400 includes an input module A for receiving a first signal from the operating state of the electronic device;

[0047] The input module A includes a first sub-circuit, which includes a first input terminal Depop1. The first input terminal Depop1 is used to receive a first signal from the operating state of the electronic device.

[0048] The first switching unit PQ47 changes its operating state according to the level signal of the first input terminal Depop1, and determines the level signal to be transmitted based on its operating state.

[0049] The input module A further includes a second sub-circuit, which includes a second input terminal Depop2 and a second switching unit PQ48.

[0050] The first input terminal Depop1 is connected to the controller 200, and the second input terminal Depop2 is connected to the audio codec 300, thereby obtaining the signal of the working status of the electronic device.

[0051] The first input terminal Depop1 is connected to the base of the first switching unit PQ47 through the third resistor R14, and the second input terminal Depop2 is connected to the base of the second switching unit PQ48 through the fourth resistor R61. The collectors of both the first switching unit PQ47 and the second switching unit PQ48 are connected to signal ground.

[0052] When a characterization operation is performed on the electronic device, a corresponding level signal is output to the switching circuit 400 according to the operating state of the electronic device. When the electronic device is not powered on, the default level signal is low; when the electronic device is powered on, the output level signal is high.

[0053] The first switching unit PQ47 changes its operating state according to the level signal of the first input terminal Depop1, and determines the level signal to be transmitted based on its operating state. When the first input terminal Depop1 is low, the first switching unit PQ47 is in the on state; when the first input terminal Depop1 is high, the first switching unit PQ47 is in the off state.

[0054] The second switching unit PQ48 is connected between the first power supply terminal S0 and the third switching unit PQ49. It is used to convert and transmit the level signal of the first input terminal Depop1. When the second input terminal Depop2 is low, the second switching unit PQ48 is in the on state; when the second input terminal Depop2 is high, the second switching unit PQ48 is in the off state.

[0055] Power module B is used to provide a second signal to adjustment module C or noise cancellation module; power module B includes a first power terminal S0, which is used to provide a second signal to adjustment module C when input module A is off, that is, to provide an input level signal to third switch unit PQ49 when the first switch unit PQ47 is off; the voltage of the first power terminal S0 is +3V.

[0056] The second power supply terminal S5 is used to provide a second signal to the noise cancellation module D when the adjustment module C is off. Specifically, it is used to provide an input level signal to the fourth switch unit PQ50 when the third switch unit PQ49 is off. The voltage of the second power supply terminal S5 is +3V.

[0057] The first power supply terminal S0 is connected between the first switching unit PQ47 and the third switching unit PQ49 through the first resistor R46; the second power supply terminal S5 is connected to the emitter of the fourth switching unit PQ50, and the second power supply terminal S5 is connected to the base of the fourth switching unit PQ50 through the second resistor R124.

[0058] The adjustment module C converts the first signal or the second signal into a third signal and maintains the stability of the circuit containing the power supply module B and the noise cancellation module D, thereby reducing mutual interference; that is, the third switching unit PQ49 is used to maintain the stability of the first power supply terminal S0 and the second power supply terminal S5, thereby reducing mutual interference.

[0059] The adjustment module C includes a third switch unit PQ49, which changes its operating state according to the first signal or the second signal, and determines the transmitted third signal based on its operating state.

[0060] The third switching unit PQ49 changes its operating state according to the level signal of the first switching unit PQ47 or the first power supply terminal S0, and determines the level signal to be transmitted based on its operating state. When the third switching unit PQ49 receives a high level, the third switching unit PQ49 is in the on state; otherwise, the third switching unit PQ49 is in the off state.

[0061] The emitter of the third switching unit PQ49 is connected to the fifth resistor R77 and the sixth resistor R123. The fifth resistor R77 and the sixth resistor R123 are connected to the signal ground through the capacitor PC. The emitter of the third switching unit PQ49 is connected to the signal ground.

[0062] The noise cancellation module is used to guide the plosive sound to the signal ground according to the third signal; the noise cancellation module D includes a fourth switch unit PQ50, which changes its operating state according to the third signal and provides input level signals to the fifth switch unit Q9 and the sixth switch unit Q11;

[0063] The fifth switch unit Q9 or the sixth switch unit Q11 is used to guide the plosive sound to the signal ground according to the received level signal.

[0064] The fourth switching unit PQ50 receives the level signal transmitted by the third switching unit PQ49 to change its operating state, and provides input level signals to the fifth switching unit Q9 and the sixth switching unit Q11. Similarly, when the fourth switching unit PQ50 receives a high level, the fourth switching unit PQ50 is in the on state; otherwise, the fourth switching unit PQ50 is in the off state.

[0065] The collector of the fourth switching unit PQ50 is connected to the fifth switching unit Q9 and the sixth switching unit Q11 via the seventh resistor R130 and the eighth resistor R135, respectively. The collector of the fifth switching unit Q9 is connected to signal ground via the ninth resistor R146, and the collector of the sixth switching unit Q11 is connected to signal ground via the tenth resistor R147. The emitters of both the fifth switching power supply and the sixth switching unit Q11 are connected to signal ground.

[0066] The fifth switching unit Q9 changes its operating state according to the level signal received from the fourth switching unit PQ50 or the second power supply terminal S5, and is used to determine whether to output the signal through the first output terminal. When the input signal of the fifth switching unit Q9 is high, the fifth switching unit Q9 is in the on state, and otherwise in the off state.

[0067] The sixth switch unit Q11 changes its operating state according to the level signal received from the fourth switch unit PQ50 or the second power supply terminal S5, and is used to determine whether to output the signal through the second output terminal. When the input signal of the sixth switch unit Q11 is high, the sixth switch unit Q11 is in the on state, and otherwise in the off state.

[0068] Output module E is used for normal playback of the audio stream; output module E includes a first output terminal and a second output terminal for normal playback of the audio stream. The first output terminal and the second output terminal are respectively connected to signal ground.

[0069] The input module A is connected to the noise cancellation module through the adjustment module C, and the noise cancellation module is connected to the output module E; the power module B is connected to the adjustment module C and the noise cancellation module respectively.

[0070] The fifth switching unit Q9 and the sixth switching unit Q11 are NPN transistors, and the first switching unit PQ47 to the fourth switching unit PQ50 are PNP transistors.

[0071] The working principle of the switching circuit 400 is as follows:

[0072] When the first input terminal Depop1 receives the first signal, and the first signal is low, the first switching unit PQ47 is in the conducting state. The first switching unit PQ47 transmits the low level of the signal ground connected to its collector to the third switching unit PQ49, and the third switching unit PQ49 is in the conducting state. The third switching unit PQ49 transmits the low level of the signal ground connected to its collector (the third signal) to the fourth switching unit PQ50, and the fourth switching unit PQ50 is in the conducting state.

[0073] Then, the fourth switching unit PQ50 sends the level signal of the second power supply terminal S5 connected to its emitter to the fifth switching unit Q9 and the sixth switching unit Q11. The base of the fifth switching unit Q9 and the base of the sixth switching unit Q11 receive a high level, so that the fifth switching unit Q9 and the sixth switching unit Q11 are both in the on state. At this time, the level signal is guided to the signal ground connected to the emitter of the fifth switching unit Q9 or the emitter of the sixth switching unit Q11.

[0074] This shuts down the HP_L and HP_R signals, eliminating audio output and thus removing popping sounds, improving the user experience.

[0075] When the first input signal Depop1 is high, the first switch unit PQ47 is in the off state, and the first power supply terminal S0 sends a high-level signal (from the second signal a of the first power supply terminal S0) to the third switch unit PQ49, making the third switch unit PQ49 in the off state. Then, the second power supply terminal S5 sends a high-level signal (from the second signal b of the second power supply terminal S5) to the fourth switch unit PQ50, making the fourth switch unit PQ50 in the off state.

[0076] Then, the collector of the fourth switching unit PQ50 sends a low-level signal to the base of the fifth switching unit Q9 and the base of the sixth switching unit Q11, respectively, so that the fifth switching unit Q9 and the sixth switching unit Q11 are both in the off state, and the HP_L signal and HP_R signal are output normally at this time.

[0077] When the input signal at the second input terminal Depop2 is low, the second switching unit PQ48 is in the conducting state. The second switching unit PQ48 transmits the low level of the signal ground connected to its collector to the third switching unit PQ49, and the third switching unit PQ49 transmits the signal in the same way.

[0078] When the input signal at the second input terminal Depop2 is high, the second switching unit PQ48 is in the off state. Similarly, the first power supply terminal S0 provides the level signal to the third switching unit PQ49.

[0079] One of the objectives of this application's embodiments is to provide an electronic device, such as... Figure 3 As shown, the system includes a controller 200 and a processor 100, and also includes an audio codec 300. The processor 100 and the audio codec 300 are connected via USB; the controller 200 and the processor 100 are connected via an LPC bus.

[0080] The audio codec 300 is connected to the device interface 500, and sends the HP_L and HP_R signals to the device interface 500. Since the device interface 500 is used to connect to a playback device, the playback device plays the HP_L and HP_R signals. The playback device can be headphones or other similar devices for playing audio.

[0081] The other end of the device interface 500 is connected to the audio codec 300 via the audio firmware 600. The audio firmware 600 detects that there is an insertion at the device interface 500 and at the same time detects that the audio stream is playing. It then sends the aforementioned information to the audio codec 300, which in turn sends the level signal in this state to the switching circuit 400.

[0082] The controller 200 and the audio codec 300 are respectively connected to the aforementioned switch circuit 400. The controller 200 or the audio codec 300 sends the level signal of its current working state to the switch circuit 400. The switch circuit 400 is used to disconnect or enable the playback of HP_L signal and HP_R signal through the playback device.

[0083] As an optional embodiment, the HP_L signal is transmitted through a first output terminal, and the HP_R signal is transmitted through a second output terminal. The switching circuit 400 is also connected to signal ground.

[0084] One of the objectives of this application is to provide a method of use for the aforementioned electronic device, comprising the following steps:

[0085] S1. A first operation to change the working state of an electronic device; the first operation is a characterization operation performed on the electronic device, including power on, power off, standby, hibernation, and restart.

[0086] S2. The controller 200 or the audio codec 300 transmits a level signal to the switching circuit 400 according to the first operation, and the level signal is transmitted and converted by the switching circuit 400.

[0087] The controller 200 sends the level signal of the working state of the electronic device to the first sub-circuit and transmits it through it. After transmission and conversion by the switching circuit 400, the HP_L signal and HP_R signal are turned on or blocked according to the converted signal.

[0088] The audio codec 300 sends the level signal of the electronic device's operating state to the input module A, and then transmits and converts it through the adjustment module C and the noise cancellation module D. Based on the converted signal, it turns on or blocks the HP_L signal and HP_R signal.

[0089] When the HP_L and HP_R signals are blocked, the playback device does not play audio, and the popping sound is avoided. When the HP_L and HP_R signals are enabled, the playback device plays audio normally.

[0090] S3, after the switching circuit 400 converts the level signal transmission, it turns off or on the HP_L and HP_R signals according to the converted level signal.

[0091] The electronic device is a laptop, the processor 100 is a Hygon CPU, the controller 200 is the laptop's EC, and the device interface 500 is F_HP OUT.

[0092] The switching circuit 400 is used under the control of the characterization operation described below.

[0093] When the electronic device is powered on, during the first 1-35 seconds of the system desktop access time, the controller 200 transmits a low-level signal to the first input terminal Depop1 of the switching circuit 400. After conversion and transmission by the switching circuit 400, this signal is conducted to the signal ground, which turns off the HP_L and HP_R signals, and there is no popping sound output at this time.

[0094] When the electronic device is powered off, within 1 second to 4 seconds after the power-off operation, the controller 200 transmits a low-level signal to the first input terminal Depop1 in the switching circuit 400. After being converted and transmitted by the switching circuit 400, this signal is conducted to the signal ground, so that the HP_L and HP_R signals are turned off, and there is no popping sound output at this time.

[0095] When the electronic device is in S3 standby mode, the popping sound is eliminated in the same way from the 1st to the 2nd second after the standby operation and from the 1st to the 6th second after the wake-up standby operation.

[0096] When the electronic device enters sleep mode (S4), from the 1st to the 10th second after the sleep operation and from the 1st to the 45th second after the wake-up sleep operation, the controller 200 is unaware of the state 4 seconds prior to the S4 sleep state. During this time, the device interface 500 on the front panel is plugged in and audio is playing, causing the second input terminal Depop2 to transmit a high-level signal to the switching circuit 400. The HP_L and HP_R signals are transmitted normally through the first and second output terminals. Otherwise, the second input terminal Depop2 maintains a low-level signal to disable the HP_L and HP_R signals via the switching circuit 400, thus preventing popping sounds.

[0097] In addition, the same method is used when electronic devices are restarted.

[0098] In other words, when the working state of the audio firmware 600 changes, i.e. when the electronic device is in sleep mode or restarting mode, only when the device interface 500 on the front panel is plugged in and audio stream is playing, the HP_L and HP_R signals of the left and right channels of the headphones are turned on, and the input signal of the second input terminal Depop2 of the popping switch circuit 400 is high.

[0099] When the firmware working state of the controller 200 changes, the controller 200 sets detailed time points for power-on / power-off / standby / sleep. Within these time points, the HP_L and HP_R signals of the left and right channels of the headphones are turned off, and the input signal of the first input terminal Depop1 of the popping sound elimination switch circuit 400 is low.

[0100] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A switching circuit for eliminating popping sounds, applied to electronic devices, characterized in that, include: An input module is used to receive a first signal from the operating status of the electronic device; The power supply module is used to provide a second signal to the regulation module or the noise cancellation module. The adjustment module converts the first signal or the second signal into a third signal and maintains the stability of the circuit where the power supply module and the noise cancellation module are located, thereby reducing mutual interference. The noise cancellation module is used to guide the plosive sound to the signal ground according to the third signal; The output module is used for normal playback of the audio stream; The input module is connected to the noise cancellation module via the adjustment module, and the noise cancellation module is connected to the output module; the power supply module is connected to both the adjustment module and the noise cancellation module. The noise cancellation module includes a fourth switching unit that changes its operating state according to the third signal and provides input level signals to the fifth and sixth switching units. The fifth or sixth switching unit is used to guide the plosive sound to the signal ground according to the received level signal.

2. A pop elimination switching circuit according to claim 1, wherein The input module includes a first sub-circuit, the first sub-circuit includes a first input terminal, the first input terminal is used to receive a first signal from the working state of the electronic device; The first switching unit changes its operating state according to the level signal of the first input terminal, and determines the level signal to be transmitted based on its operating state.

3. A pop noise eliminating switching circuit according to claim 2, wherein The input module further includes a second sub-circuit, which includes a second input terminal and a second switching unit.

4. A pop noise eliminating switching circuit according to claim 1, wherein The power module includes a first power terminal, which is used to provide a second signal to the adjustment module when the input module is in the off state; The second power supply terminal is used to provide a second signal to the noise cancellation module when the adjustment module is in the off state.

5. A pop noise eliminating switching circuit according to claim 1, wherein The adjustment module includes a third switch unit, which changes its operating state according to the first signal or the second signal, and determines the transmitted third signal based on its operating state.

6. A pop noise eliminating switching circuit according to claim 1, wherein The output module includes a first output terminal and a second output terminal, which are used to play the audio stream normally.

7. A pop noise eliminating switching circuit according to claim 3, wherein The first input terminal is connected to the controller, and the second input terminal is connected to the audio codec, thereby obtaining a signal indicating the operating status of the electronic device.

8. An electronic device comprising a controller and a processor, characterized in that It also includes an audio codec, which is connected to a device interface for connecting to a playback device, and the other end of the device interface is connected to the audio codec via audio firmware; The controller and the audio codec are respectively connected to the switching circuit as described in any one of claims 1-7, and the switching circuit is used to disconnect or enable the transmission of HP_L signal and HP_R signal through the playback device.

9. A method of using an electronic device, applied to the electronic device of claim 8, characterized in that, Includes the following steps, S1, the first operation to change the working state of the electronic device; S2. The controller or audio codec transmits a level signal to the switching circuit according to the first operation, and the level signal is transmitted and converted by the switching circuit. S3. Turn off or turn on the HP_L and HP_R signals according to the level signal converted by the switching circuit.

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