Circuit for eliminating plosive sound of onboard sound card and computer mainboard
By designing an embedded controller on the computer motherboard to monitor the power signal and PG signal, delaying the change in the working state of the onboard sound card, solving the problem of the onboard sound card bursting when the onboard sound card is turned on and off, improving the audio quality and simplifying hardware debugging.
Patent Information
- Application Number
- CN202420096017.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-15
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-15
AI Technical Summary
The prior art is difficult to effectively eliminate the burst sound generated by onboard sound cards when the computer is turned on and off, resulting in the audio experience being affected and the hardware development and debugging time being long.
Design a burst sound cancellation circuit of the onboard sound card including computer power switch, south bridge chip, embedded controller and ATX power supply. The embedded controller detects the power signal and PG signal to delay the working state of the onboard sound card. Avoid burst sounds caused by current impact.
It effectively avoids the onboard sound card from producing burst sound when the computer is turned on and off, improves the audio quality, simplifies the hardware debugging process, and shortens the development cycle.
Smart Images
Figure CN222192537U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of computers, in particular to a circuit for eliminating the blasting sound of a board-mounted sound card and a computer mainboard. Background Art
[0002] With the rapid development of computer technology, multimedia computers are widely used, and most computers on the market are equipped with audio devices to provide audio input and output functions for users.
[0003] An onboard sound card is an audio processing device integrated on a computer motherboard. It is responsible for processing computer audio signals and can be connected to speakers, external multimedia speakers, headphones and other audio devices through the audio slots or pins on the motherboard to achieve audio input and output functions. Onboard sound cards have the advantages of high cost performance, space saving on motherboards, and good compatibility, and have been widely used. At the same time, users' requirements for the sound quality of onboard sound cards are also constantly improving.
[0004] Popping sound, or POP sound, refers to the short-term popping sound that appears in the sound effect. It is mainly caused by the transient impact caused by various operations when the audio device is powered on or off. For computer products, popping sound is caused by the impact of the current when the computer is turned on and off, and is emitted through the computer speakers, external multimedia speakers or headphones. The existence of popping sound will not only affect the audio experience brought by the onboard sound card to the user, but also affect the safety of the playback device.
[0005] The existing method of eliminating the plosive sound of the onboard sound card is usually to continuously debug the computer hardware during the development period to minimize the plosive sound, so as to provide users with a better audio experience, or to adjust the volume of the computer product to the minimum before starting or shutting down the computer product to minimize the plosive sound and reduce the impact on the user. However, these two methods either increase the debugging time of hardware development, or cause inconvenience to the user and cannot actually eliminate the plosive sound of the onboard sound card. Utility Model Content
[0006] The utility model aims to provide a circuit for eliminating the popping sound of an onboard sound card and a computer mainboard, which can prevent the onboard sound card from generating the popping sound when the computer product is turned on.
[0007] The utility model aims to provide a circuit for eliminating the popping sound of an onboard sound card and a computer mainboard, which can prevent the onboard sound card from generating the popping sound when the computer product is turned on or off.
[0008] To achieve the above-mentioned purpose, the utility model provides an onboard sound card popping sound elimination circuit, which is used to be set on a computer motherboard, and includes a computer power switch, a south bridge chip, an embedded controller, an ATX power supply and an onboard sound card, wherein the onboard sound card is connected to the south bridge chip, and the onboard sound card has a reset port; the embedded controller includes a first I / O interface, a second I / O interface and a third I / O interface, wherein the first I / O interface is connected to the signal end of the computer power switch, the second I / O interface is connected to the PG interface of the ATX power supply, and the third I / O interface is connected to the reset port of the onboard sound card; wherein, when the embedded controller detects through the first I / O interface that the signal end of the computer power switch sends a power-on signal, the first level signal is output to the reset port of the onboard sound card, so that the onboard sound card remains in a reset state, until the embedded controller receives a PG signal from the PG interface through the second I / O interface, the embedded controller outputs a second level signal to the reset port of the onboard sound card, so that the onboard sound card enters a working state.
[0009] Preferably, the embedded controller also includes a fourth I / O interface, which is connected to the SLP_S3 interface of the south bridge chip. When the embedded controller detects through the fourth I / O interface that the SLP_S3 interface of the south bridge chip generates an SLP_S3 control signal for entering a shutdown or sleep state, the embedded controller outputs the first level signal to the reset port of the onboard sound card to make the onboard sound card enter the reset state.
[0010] Preferably, the first level signal is a low level signal, and the second level signal is a high level signal; and the SLP_S3 control signal for entering the shutdown or sleep state is a low level signal.
[0011] Preferably, the south bridge chip is a platform path controller.
[0012] Preferably, the PG signal is an ATX_PG signal or a P5V_PG signal.
[0013] Preferably, the onboard sound card is connected to the south bridge chip via a USB bus.
[0014] Preferably, the onboard sound card is connected to the speaker interface via an audio power amplifier, and the onboard sound card is connected to the headphone and microphone interface.
[0015] Preferably, the embedded controller is also connected to a battery, a fan connector and a temperature sensor.
[0016] The utility model also provides a computer mainboard, comprising the above-mentioned circuit for eliminating the blasting sound of the onboard sound card.
[0017] The beneficial effects of the utility model include: the circuit for eliminating the popping sound of the onboard sound card of the utility model and the computer motherboard provided with the circuit for eliminating the popping sound of the onboard sound card, when the computer motherboard is turned on, the onboard sound card enters the working state after the ATX power supply sends a PG signal, thereby preventing the onboard sound card from being affected by the current impact when the computer motherboard is turned on and powered on, thereby preventing the onboard sound card from being affected by the current impact when the computer motherboard is turned on and powered on, thereby preventing the onboard sound card from being affected by the current impact when the computer power is turned off, thereby preventing the onboard sound card from being affected by the current impact when the computer power is turned off, thereby preventing the onboard sound card from being affected by the current impact when the computer power is turned off, thereby preventing the onboard sound card from being affected by the current impact when the computer power is turned off, thereby preventing the onboard sound card from being affected by the current impact when the computer power is turned off, thereby preventing the onboard sound card from being affected by the current impact when the computer power is turned off, thereby preventing the onboard sound card from being affected by the current impact when the computer power is turned off, thereby preventing the onboard sound card from being affected by the current impact when the computer product is turned on and off, thereby preventing the computer audio quality from being effectively improved, and the utility model is cleverly designed, simple in structure and easy to implement, thereby improving the hardware debugging work efficiency during the development and debugging of the computer motherboard, thereby shortening the product development cycle. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings are only provided for reference and explanation and are not intended to limit the present invention.
[0019] In the accompanying drawings,
[0020] Figure 1 The utility model is a structural block diagram of a circuit for eliminating plosive sound of an onboard sound card.
[0021] Figure 2 The utility model is a control timing diagram of the onboard sound card popping sound elimination circuit when the computer motherboard is turned on.
[0022] Figure 3 The utility model is a control timing diagram of the onboard sound card popping sound elimination circuit when the computer motherboard is shut down. DETAILED DESCRIPTION
[0023] In order to further illustrate the technical means and effects adopted by the present invention, the preferred embodiments of the present invention and the accompanying drawings are described in detail below.
[0024] The utility model provides a circuit for eliminating popping sounds of an onboard sound card and a computer mainboard provided with the circuit for eliminating popping sounds of an onboard sound card, which can prevent the onboard sound card from generating popping sounds, namely, POP sounds, when the computer product is turned on or off.
[0025] like Figure 1As shown, the circuit for eliminating the popping sound of the onboard sound card of the present invention is used to be arranged on a computer motherboard, and includes a computer power switch 10, a south bridge chip 20, an embedded controller 30, an ATX power supply 40 and an onboard sound card 50.
[0026] The onboard sound card 50 is connected to the south bridge chip 20 to perform data communication with the south bridge chip 20 and is controlled by the south bridge chip 20 . The onboard sound card 50 has a reset port.
[0027] The embedded controller 30 includes a first I / O (input / output) interface 31, a second I / O interface 32 and a third I / O interface 33, the first I / O interface 31 is connected to the signal end of the computer power switch 10, the second I / O interface 32 is connected to the PG (Power Good) interface of the ATX power supply 40, and the third I / O interface 33 is connected to the reset port of the onboard sound card 50.
[0028] When the embedded controller 30 detects through the first I / O interface 31 that the signal end of the computer power switch 10 sends a power-on signal, it outputs a first level signal to the reset port of the onboard sound card 50, so that the onboard sound card 50 remains in a reset state until the embedded controller 30 receives a PG signal from the PG interface through the second I / O interface 32, at which time the embedded controller 30 outputs a second level signal to the reset port of the onboard sound card 50, so that the onboard sound card 50 enters a working state.
[0029] Therefore, the circuit for eliminating popping sound of the onboard sound card of the utility model, when the computer motherboard is turned on, the embedded controller 30 detects the power-on signal of the computer power switch 10, and then first outputs a first level signal to the reset port of the onboard sound card 50 to keep the onboard sound card 50 in the reset state, until the embedded controller 30 receives the PG signal sent by the PG interface of the ATX power supply 40, and then outputs a second level signal to the reset port of the onboard sound card 50 to put the onboard sound card 50 into the working state, thereby avoiding the onboard sound card 50 from being affected by the current impact when the computer power is powered on and generating interference output, i.e., popping sound.
[0030] Furthermore, the embedded controller 30 further includes a fourth I / O interface 34, and the fourth I / O interface 34 is connected to the SLP_S3 interface of the south bridge chip 20. When the embedded controller 30 detects through the fourth I / O interface 34 that the SLP_S3 interface of the south bridge chip 20 generates an SLP_S3 control signal for entering a shutdown or sleep state, the embedded controller 30 outputs the first level signal to the reset port of the onboard sound card 50, so that the onboard sound card 50 enters the reset state.
[0031] Therefore, the circuit for eliminating popping sound of the onboard sound card of the utility model, when the computer motherboard is shut down, the embedded controller 30 detects that the SLP_S3 interface of the south bridge chip 20 generates an SLP_S3 control signal for entering the shutdown or sleep state, that is, the computer motherboard will enter the shutdown or sleep state, and then directly outputs a first level signal to the reset port of the onboard sound card 50, so that the onboard sound card 50 enters the reset state. Since after the south bridge chip 20 generates the SLP_S3 control signal for entering the shutdown or sleep state, the computer motherboard will perform a series of sleep or shutdown actions, and finally turn off the computer power. When the south bridge chip 20 generates the SLP_S3 control signal for entering the shutdown or sleep state, the circuit for eliminating popping sound of the onboard sound card of the utility model immediately causes the onboard sound card 50 to enter the reset state, which can prevent the onboard sound card 50 from being affected by the current impact when the computer power is turned off and generating popping sound.
[0032] In a preferred embodiment, the first level signal is a low level signal, and the second level signal is a high level signal; the SLP_S3 control signal for entering the shutdown or sleep state is a low level signal.
[0033] The working principle of the onboard sound card popping sound elimination circuit of the utility model is based on the power on / off timing of the computer motherboard. The following takes the first level signal as a low level signal, the second level signal as a high level signal, and the SLP_S3 control signal for entering the shutdown or sleep state as a low level signal as an example for explanation. Please also refer to Figure 2 and Figure 3 .
[0034] like Figure 2 As shown, during the process of starting up the computer motherboard, when the computer power switch 10 is pressed and its signal end sends a power-on signal, the computer motherboard starts to power on, and then the south bridge chip 20 pulls up the SLP_S3 control signal to a high level signal. However, the ATX power supply 40 is able to normally output 3V, 5V, 12V and other working voltages (such as Figure 2 The PG signal is only sent when the power-on time of the computer motherboard is P12V / P5V / P3V3 (as shown in the figure), that is, compared with the power-on time of the computer motherboard, the PG signal will be delayed for a certain period of time before being sent, notifying the basic operating voltage of various parts of the computer motherboard is normal.
[0035] Based on this, the circuit for eliminating popping sound of the onboard sound card of the utility model does not immediately put the onboard sound card 50 into working state when the computer motherboard is turned on. Instead, when the embedded controller 30 detects the power-on signal of the computer power switch 10, it still keeps outputting the first level signal (low level signal) to the reset port of the onboard sound card 50, so that the onboard sound card 50 remains in the reset state, until the embedded controller 30 receives the PG signal sent by the PG interface of the ATX power supply 40, the embedded controller 30 outputs the second level signal (high level signal) to the reset port of the onboard sound card 50, so that the onboard sound card 50 enters the working state. In this way, the onboard sound card 50 can enter the working state later than the power-on time of the computer motherboard, thereby avoiding the onboard sound card 50 being affected by the current impact when the computer power is turned on and generating interference output, i.e., popping sound.
[0036] like Figure 3 As shown, during the shutdown process of the computer motherboard, when the south bridge chip 20 receives the shutdown command, it first pulls down the SLP_S3 control signal, that is, generates a low-level SLP_S3 control signal for entering the shutdown or sleep state. At the same time, the computer motherboard enters the shutdown state and will perform a series of sleep or shutdown actions, and finally turn off the computer power (ALL_PWR).
[0037] Based on this, the circuit for eliminating popping sound of the onboard sound card of the utility model does not follow a series of sleep or shutdown actions of the computer motherboard until the computer power is turned off to make the onboard sound card 50 enter the reset state, but when the embedded controller 30 detects that the south bridge chip 20 generates an SLP_S3 control signal to enter the shutdown or sleep state, it directly outputs a first level signal (low level signal) to the reset port of the onboard sound card 50 to make the onboard sound card 50 enter the reset state. That is to say, the onboard sound card 50 has entered the reset state before the computer power is turned off, thereby avoiding the popping sound caused by the current shock when the computer power is turned off.
[0038] Furthermore, the south bridge chip 20 may be a platform controller hub (Platform Controller Hub, PCH).
[0039] Further, the PG signal emitted by the ATX power supply 40 may be an ATX_PG signal or a P5V_PG signal.
[0040] In one embodiment, the onboard sound card 50 is connected to the south bridge chip 20 via a USB bus. Moreover, the onboard sound card 50 is connected to a speaker interface 52 via an audio power amplifier 51, and the onboard sound card 50 is connected to an earphone and microphone interface 53. In one embodiment, the model of the onboard sound card 50 is KT02F22, and the model of the audio power amplifier 51 is NS4251.
[0041] Furthermore, the embedded controller 30 is also connected to a battery, a fan connector and a temperature sensor. In one embodiment, the model of the embedded controller 30 is IT5571.
[0042] The utility model also provides a computer mainboard, comprising the above-mentioned circuit for eliminating the blasting sound of the onboard sound card.
[0043] In summary, the circuit for eliminating the popping sound of the onboard sound card and the computer motherboard provided with the circuit for eliminating the popping sound of the onboard sound card of the utility model, when the computer motherboard is turned on, the onboard sound card enters the working state after the ATX power supply sends a PG signal, thereby preventing the onboard sound card from being affected by the current impact when the computer motherboard is turned on and powered on, thereby preventing the onboard sound card from generating a popping sound due to the impact of the current when the computer motherboard is turned on and powered on; further, when the computer motherboard is turned off, the onboard sound card enters the reset state in time when the south bridge chip generates the SLP_S3 control signal for entering the shutdown or sleep state, thereby preventing the onboard sound card from generating a popping sound due to the impact of the current when the computer power is turned off. Therefore, the circuit for eliminating the popping sound of the onboard sound card and the computer motherboard of the utility model can prevent the onboard sound card from generating a popping sound when the computer product is turned on and off, thereby effectively improving the audio quality of the computer. Moreover, the utility model is cleverly designed, simple in structure and easy to implement, thereby improving the efficiency of hardware debugging work during the development and debugging of the computer motherboard and shortening the product development cycle.
[0044] As described above, for ordinary technicians in this field, various other corresponding changes and modifications can be made according to the technical scheme and technical concept of the utility model, and all these changes and modifications should fall within the protection scope of the claims of the utility model.
Claims
1. A circuit for eliminating popping sound of an onboard sound card, used to be arranged on a computer motherboard, characterized in that: The invention comprises a computer power switch, a south bridge chip, an embedded controller, an ATX power supply and an onboard sound card, wherein the onboard sound card is connected to the south bridge chip and has a reset port; the embedded controller comprises a first I / O interface, a second I / O interface and a third I / O interface, wherein the first I / O interface is connected to the signal end of the computer power switch, the second I / O interface is connected to the PG interface of the ATX power supply, and the third I / O interface is connected to the reset port of the onboard sound card; wherein, when the embedded controller detects through the first I / O interface that the signal end of the computer power switch sends a power-on signal, the embedded controller outputs a first level signal to the reset port of the onboard sound card to keep the onboard sound card in a reset state, until the embedded controller receives a PG signal from the PG interface through the second I / O interface, the embedded controller outputs a second level signal to the reset port of the onboard sound card to put the onboard sound card into a working state.
2. The circuit for eliminating the plosive sound of the onboard sound card according to claim 1, characterized in that: The embedded controller also includes a fourth I / O interface, which is connected to the SLP_S3 interface of the south bridge chip. When the embedded controller detects through the fourth I / O interface that the SLP_S3 interface of the south bridge chip generates an SLP_S3 control signal for entering a shutdown or sleep state, the embedded controller outputs the first level signal to the reset port of the onboard sound card to cause the onboard sound card to enter the reset state.
3. The circuit for eliminating the plosive sound of the onboard sound card according to claim 2, characterized in that: The first level signal is a low level signal, and the second level signal is a high level signal; the SLP_S3 control signal for entering the shutdown or sleep state is a low level signal.
4. The circuit for eliminating the plosive sound of the onboard sound card according to claim 1 or 2, characterized in that: The south bridge chip is a platform path controller.
5. The circuit for eliminating the plosive sound of the onboard sound card according to claim 1 or 2, characterized in that: The PG signal is an ATX_PG signal or a P5V_PG signal.
6. The circuit for eliminating the plosive sound of the onboard sound card according to claim 1 or 2, characterized in that: The onboard sound card is connected to the south bridge chip via a USB bus.
7. The circuit for eliminating the plosive sound of the onboard sound card according to claim 1 or 2, characterized in that: The onboard sound card is connected to the speaker interface through an audio power amplifier, and the onboard sound card is connected to the earphone and microphone interface.
8. The circuit for eliminating plosive sound of an onboard sound card according to claim 1 or 2, characterized in that: The embedded controller is also connected to a battery, a fan connector and a temperature sensor.
9. A computer motherboard, characterized in that: A circuit for eliminating the popping sound of an onboard sound card comprising any one of claims 1-8.