CN111525499A - Electronic device - Google Patents
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- CN111525499A CN111525499A CN201910103612.6A CN201910103612A CN111525499A CN 111525499 A CN111525499 A CN 111525499A CN 201910103612 A CN201910103612 A CN 201910103612A CN 111525499 A CN111525499 A CN 111525499A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
Abstract
The present disclosure relates to an electronic device, including: the device comprises a codec, an earphone interface module and a first circuit protection module; the first circuit protection module is connected between the codec and the earphone interface module, and is used for forming an open circuit when detecting that the parameter value of the electric signal from the earphone interface module meets a first condition so as to prevent the electric signal from the earphone interface module from being conducted to the codec. The embodiment of the present disclosure can effectively prevent surge signals caused when the earphone interface module is connected to the external device, and negative feedback impact such as direct current signals damages the codec, thereby effectively improving the service life of the codec, further effectively improving the service life of the audio function of the electronic device, reducing the repair and replacement probability of the electronic device, and saving manpower and material resources.
Description
Technical Field
The present disclosure relates to the field of electronic technologies, and in particular, to an electronic device.
Background
Generally, Codec (COder-DECoder) can be represented as a Chip related to coding and decoding and processing all audio signals of a mobile phone, and can be one of SOCs (System on chips) of the mobile phone. The audio signal may include, for example, a voice call of a mobile phone, audio playback, voice recognition, and all signals related to voice-related operations. Once the audio signal of the mobile phone has a problem, the user is aware of the problem, and the evaluation of the user on the overall quality of the mobile phone is greatly reduced, so that the user can repair the mobile phone or change the mobile phone back.
In the correlation technique, the manufacturer can set up 3.5mm earphone interface on the cell-phone, and the user is in daily use, except utilizing the external passive equipment such as earphone of 3.5mm earphone interface, still can utilize the external sound box such as 3.5mm earphone interface, from rapping bar active equipment. Because the active devices all have certain voltage, when the external active device is connected with the mobile phone through the 3.5mm earphone interface, a potential difference exists between the GND (ground end of the wire) of the external active device and the GND of the Codec chip in the mobile phone, so that a pulse surge signal can be generated, wherein the surge signal can be represented as a peak current or voltage which is far greater than a steady-state current or voltage of the circuit and is generated at the moment of power-on or under the condition that the circuit is abnormal. The surge signal can be conducted to the Codec chip of the mobile phone through the left and right channels of the earphone, and since the Codec chip includes precision elements such as an ADC (Analog-to-Digital Converter), a DAC (Digital-to-Analog Converter), and the like, the Codec chip is easily damaged by the impact of the pulse surge signal. Once a Codec chip is damaged, there are, for example: the problems of earphone silence, earphone noise, silent conversation, conversation noise and the like increase the repair and return cost of the mobile phone, and cause the waste of a large amount of manpower and material resources.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides an electronic device.
According to a first aspect of embodiments of the present disclosure, there is provided an electronic device, including: the device comprises a codec, an earphone interface module and a first circuit protection module;
the first circuit protection module is connected between the codec and the earphone interface module, and is used for forming an open circuit when detecting that a parameter value of an electric signal from the earphone interface module meets a first condition so as to prevent the electric signal from the earphone interface module from being conducted to the codec.
In one possible implementation manner, the method further includes: a second circuit protection module;
the second circuit protection module is connected between the earphone interface module and the ground, and is used for forming a path to transmit the electric signal from the earphone interface module to the ground when detecting that the parameter value of the electric signal from the earphone interface module meets a second condition.
In a possible implementation manner, the codec includes a first interface and a second interface, the first circuit protection module includes a third interface, a fourth interface, a fifth interface and a sixth interface, and the headphone interface module includes a seventh interface and an eighth interface;
the first interface is connected with the third interface, the fifth interface is connected with the seventh interface, the second interface is connected with the fourth interface, and the sixth interface is connected with the eighth interface;
when detecting that the parameter value of the electrical signal received by the fifth interface meets a first condition, the first circuit protection module forms an open circuit to prevent the electrical signal received by the fifth interface from being conducted to the codec;
the first circuit protection module forms an open circuit when detecting that the parameter value of the electrical signal received by the sixth interface meets a first condition, so as to prevent the electrical signal received by the sixth interface from being conducted to the codec.
In one possible implementation manner, the method further includes: a second circuit protection module comprising a first sub-module and a second sub-module;
the first sub-module is connected between the fifth interface and the ground, and when detecting that the parameter value of the received electric signal meets a second condition, the first sub-module forms a passage to transmit the electric signal received by the first sub-module to the ground;
the second submodule is connected between the sixth interface and the ground, and when detecting that the parameter value of the received electric signal meets a second condition, the second submodule forms a path so as to transmit the electric signal received by the second submodule to the ground.
In a possible implementation manner, the device further comprises a first resistor and a second resistor;
the first resistor is connected between the fifth interface and the seventh interface;
the second resistor is connected between the sixth interface and the eighth interface.
In a possible implementation manner, the first circuit protection module includes an overvoltage protection chip or an overcurrent protection chip.
In one possible implementation, the second circuit protection module includes a transient suppression diode or a varistor.
In one possible implementation, the first condition includes: the voltage value of the electric signal is greater than or equal to the first voltage threshold value, or the current value of the electric signal is greater than or equal to the first current threshold value.
In one possible implementation, the second condition includes: the voltage value of the electric signal is greater than or equal to the second voltage threshold value, or the current value of the electric signal is greater than or equal to the second current threshold value.
In a possible implementation manner, the first interface and the second interface are respectively used for transmitting left and right channel signals of an earphone, and the seventh interface and the eighth interface are respectively used for transmitting left and right channel signals of an earphone.
This disclosed embodiment is through connecting first circuit protection module between codec and earphone interface module, and make first circuit protection module when detecting the parameter value that comes from the signal of telecommunication of earphone interface module and accord with first condition, form and open circuit, in order to prevent the signal of telecommunication conduction that comes from earphone interface module to codec, surge signal that arouses when can effectively prevent earphone interface module from connecting external equipment from this, negative feedback impact such as direct current signal damages codec, thereby effectively improve codec's life, and then effectively improve electronic equipment audio function's life, reduce electronic equipment's repair and move back the probability, save manpower and materials resource.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a block diagram illustrating an electronic device in accordance with an exemplary embodiment.
FIG. 2 is a block diagram illustrating an electronic device in accordance with an example embodiment.
FIG. 3 is a block diagram illustrating an electronic device in accordance with an example embodiment.
FIG. 4 is a block diagram illustrating an electronic device in accordance with an example embodiment.
FIG. 5 is a block diagram illustrating an electronic device in accordance with an example embodiment.
Fig. 6 is a block diagram of a first portion of an electronic device shown in an application example.
Fig. 7 is a block diagram of a second portion of an electronic device shown in an application example.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
FIG. 1 is a block diagram illustrating an electronic device in accordance with an exemplary embodiment. The electronic device may be a device such as a mobile phone, a smart watch, a tablet computer, a notebook computer, a desktop computer, and the like, and the type of the electronic device is not limited in the embodiments of the present disclosure. As shown in fig. 1, the electronic device may include: a codec 10, an earphone interface module 12 and a first circuit protection module 11; the first circuit protection module 11 is connected between the codec 10 and the headphone interface module 12, and the first circuit protection module 11 is configured to form an open circuit when detecting that a parameter value of the electrical signal from the headphone interface module 12 meets a first condition, so as to prevent the electrical signal from the headphone interface module 12 from being conducted to the codec 10.
In the disclosed embodiment, the earphone interface module may be represented as an audio interface that may input or output an audio signal from an external device supporting access. The earphone interface module may be an audio interface such as a 2.5mm earphone jack, a 3.5mm earphone jack, etc., and the type of the earphone interface module is not limited in the embodiments of the present disclosure.
The first circuit Protection module may be, for example, an OVP (Over Voltage Protection) chip or an OCP (Over Current Protection) chip, and the type of the first circuit Protection module is not limited in the embodiment of the present disclosure.
As an example of the present embodiment, the parameter of the electrical signal may be a current value of the electrical signal, and the first condition may be that the current value of the electrical signal is greater than or equal to a first current threshold. The first circuit protection module 11 may be connected between the codec 10 and the headphone interface module 12 such that electrical signals from the headphone interface module 12 need to be conducted to the codec 10 via the first circuit protection module 11. The first circuit protection module 11 may form a path when detecting that the current value of the received electrical signal is smaller than the current threshold value, so that normal communication between the codec 10 and the earphone interface module 12 is enabled; the first circuit protection module 11 may form an open circuit to prevent the received electrical signal from being conducted to the codec 10 when detecting that the current value of the received electrical signal is greater than or equal to the current threshold.
As another example of the present embodiment, the parameter of the electrical signal may be a voltage value of the electrical signal, and the first condition may be that the voltage value of the electrical signal is greater than or equal to a first voltage threshold. The first circuit protection module 11 may be connected between the codec 10 and the headphone interface module 12 such that electrical signals from the headphone interface module 12 need to be conducted to the codec 10 via the first circuit protection module 11. The first circuit protection module 11 may form a path when detecting that the voltage value of the received electrical signal is less than the voltage threshold value, so that normal communication between the codec 10 and the earphone interface module 12 is enabled; the first circuit protection module 11 may form an open circuit to prevent the received electrical signal from being conducted to the codec 10 when detecting that the voltage value of the received electrical signal is greater than or equal to the voltage threshold.
It should be noted that, according to the needs of circuit protection, the embodiments of the present disclosure may select a parameter value of the applicable electrical signal (e.g., a power value of the electrical signal) and an applicable first condition (e.g., a power value of the electrical signal is greater than or equal to a power threshold value). The embodiment of the present disclosure does not limit the parameters and the first condition of the electrical signal.
This disclosed embodiment is through connecting first circuit protection module between codec and earphone interface module, and make first circuit protection module when detecting the parameter value that comes from the signal of telecommunication of earphone interface module and accord with first condition, form and open circuit, in order to prevent the signal of telecommunication conduction that comes from earphone interface module to codec, surge signal that arouses when can effectively prevent earphone interface module from connecting external equipment from this, negative feedback impact such as direct current signal damages codec, thereby effectively improve codec's life, and then effectively improve electronic equipment audio function's life, reduce electronic equipment's repair and move back the probability, save manpower and materials resource.
FIG. 2 is a block diagram illustrating an electronic device in accordance with an example embodiment. As shown in fig. 2, the difference between fig. 2 and fig. 1 is that the electronic device further includes: a second circuit protection module 20; the second circuit protection module 20 is connected between the earphone interface module 12 and the ground, and the second circuit protection module 20 is configured to form a path to conduct the electrical signal from the earphone interface module to the ground when detecting that a parameter value of the electrical signal from the earphone interface module 12 meets a second condition.
In the embodiment of the present disclosure, the second circuit protection module may be, for example, any type of TVS (Transient Voltage super) or any type of varistor, and the embodiment of the present disclosure does not limit the type of the second circuit protection module.
As an example of the embodiment, the parameter of the electrical signal may be a current value, and the second condition may be that the current value of the electrical signal is greater than or equal to a second current threshold. The second circuit protection module 20 may be connected between the earphone interface module 12 and the ground, and the second circuit protection module 20 may form an open circuit when detecting that the current value of the electrical signal from the earphone interface module 12 is smaller than a second current threshold value, so that the electrical signal from the earphone interface module 12 is conducted to the first circuit protection module 11; the second circuit protection module 20 may form a path such that the electrical signal from the earphone interface module 12 is conducted to the ground when detecting that the current value of the electrical signal from the earphone interface module 12 is greater than or equal to the second current threshold value.
As another example of the embodiment, the parameter of the electrical signal may be a voltage value, and the second condition may be that the voltage value of the electrical signal is greater than or equal to a second voltage threshold. The second circuit protection module 20 may be connected between the earphone interface module 12 and the ground, and the second circuit protection module 20 may form an open circuit when detecting that the voltage value of the electrical signal from the earphone interface module 12 is less than the second voltage threshold value, so that the electrical signal from the earphone interface module 12 is conducted to the first circuit protection module 11; the second circuit protection module 20 may form a path so that the electrical signal from the headphone interface module 12 is conducted to the ground when it detects that the voltage value of the electrical signal from the headphone interface module 12 is greater than or equal to the second voltage threshold.
In the embodiment of the disclosure, the second circuit protection module may form a path to conduct the received electrical signal to the ground when detecting that a parameter value of the electrical signal from the earphone interface module meets a second condition, so that the first circuit protection module and the second circuit protection module may provide dual protection for a codec of the electronic device, and in the first circuit protection module and the second circuit protection module, when one of the circuit protection modules fails or the protection is interrupted, the other circuit protection module may still provide protection for the codec of the electronic device, thereby further prolonging the service life of the codec.
FIG. 3 is a block diagram illustrating an electronic device in accordance with an example embodiment. As shown in fig. 3, the codec 10 includes a first interface 101 and a second interface 102, the first circuit protection module 11 includes a third interface 103, a fourth interface 104, a fifth interface 105 and a sixth interface 106, and the headphone interface module 12 includes a seventh interface 107 and an eighth interface 108; the first interface 101 is connected to the third interface 103, the fifth interface 105 is connected to the seventh interface 107, the second interface 102 is connected to the fourth interface 104, and the sixth interface 106 is connected to the eighth interface 108; when detecting that the parameter value of the electrical signal received by the fifth interface 105 meets the first condition, the first circuit protection module 11 forms an open circuit to prevent the electrical signal received by the fifth interface 105 from being conducted to the codec 10; the first circuit protection module 11 forms an open circuit when detecting that the parameter value of the electrical signal received by the sixth interface 106 meets the first condition, so as to prevent the electrical signal received by the sixth interface 106 from being conducted to the codec 10.
As an example of this embodiment, the first interface 101 may be connected with the third interface 103, and the fifth interface 105 may be connected with the seventh interface 107, so that the electrical signal from the seventh interface 107 of the earphone interface module 12 may be conducted to the first interface 101 of the codec 10 via the fifth interface 105 and the third interface 103, respectively. The second interface 102 may be connected to the fourth interface 104 and the sixth interface 106 may be connected to the eighth interface 108, such that electrical signals from the eighth interface 108 of the headphone interface module 12 may be conducted to the second interface 102 of the codec 10 via the sixth interface 106 and the fourth interface 104.
The first circuit protection module 11 may, upon detecting that the parameter value of the electrical signal received by the fifth interface 105 does not meet the first condition, form a path such that the electrical signal received by the fifth interface 105 is conducted to the first interface 101 of the codec 10 via the third interface 103; the first circuit protection module 11 may form an open circuit when detecting that the parameter value of the electrical signal received by the fifth interface 105 meets the first condition, so as to prevent the electrical signal received by the fifth interface 105 from being conducted to the codec 10; the first circuit protection module 11 may, upon detecting that the parameter value of the electrical signal received by the sixth interface 106 does not meet the first condition, form a path such that the electrical signal received by the sixth interface 106 is conducted to the second interface 102 of the codec 10 via the fourth interface 104; the first circuit protection module 11 forms an open circuit when detecting that the parameter value of the electrical signal received by the sixth interface 106 meets the first condition, so as to prevent the electrical signal received by the sixth interface 106 from being conducted to the codec 10.
In a possible implementation manner, the first interface and the second interface may be respectively used for transmitting left and right channel signals of the earphone, and the seventh interface and the eighth interface may be respectively used for transmitting left and right channel signals of the earphone
Therefore, whether parameter values of left and right channel signals of the earphone interface module meet a first condition or not can be independently judged by the first channel protection module, and the judgment results of each channel are independently processed, when the signals of the channels on one side are overloaded and the signals of the channels on the other side are normal, the signal transmission of the channels on one side with the overloaded signals can be blocked, the signals can still be normally transmitted by the channels on one side with the normal signals, and the phenomenon that the signals on the channels on one side cannot be transmitted by the signals on the channels on the other side due to the fact that the signals on the channels on one side are overloaded and the signals on the channels on.
FIG. 4 is a block diagram illustrating an electronic device in accordance with an example embodiment. As shown in fig. 4, the difference between fig. 4 and fig. 3 is that the electronic device may further include: a second circuit protection module 20, the second circuit protection module 20 comprising a first sub-module 201 and a second sub-module 202; the first sub-module 201 is connected between the fifth interface 105 and the ground, and the first sub-module 201 forms a path to conduct the electrical signal received by the first sub-module to the ground when detecting that the parameter value of the received electrical signal meets the second condition; the second sub-module 202 is connected between the sixth interface 106 and the ground, and the second sub-module 202 forms a path to conduct the electrical signal received by the second sub-module to the ground when detecting that the parameter value of the received electrical signal meets the second condition.
As an example of the present embodiment, the second circuit protection module 20 may include a first sub-module 201 and a second sub-module 202. The first sub-module 201 may be connected between the fifth interface 105 and ground, and the first sub-module 201 may form an open circuit when detecting that the parameter value of the received electrical signal does not comply with the second condition, so that the electrical signal from the seventh interface 107 may be transmitted to the fifth interface 105. The first submodule 201 may, upon detecting that a parameter value of the received electrical signal fulfils a second condition, form a path such that the electrical signal from the seventh interface 107 may be conducted to ground and not to the fifth interface 105. The second sub-module 202 may be connected between the sixth interface 106 and ground, and the second sub-module 202 may form an open circuit when detecting that the parameter value of the received electrical signal does not meet the second condition, so that the electrical signal from the eighth interface 108 may be transmitted to the sixth interface 106. The second sub-module 202 may, upon detecting that the parameter value of the received electrical signal meets the second condition, form a path such that the electrical signal from the eighth interface 108 may be conducted to ground and not to the sixth interface 106.
In one possible implementation, the first interface and the second interface may be used for transmitting left and right channel signals of the headset, respectively, and the seventh interface and the eighth interface may be used for transmitting left and right channel signals of the headset, respectively.
Therefore, the second circuit protection module can independently judge whether the parameter values of the left and right channel signals of the earphone interface module accord with a second condition or not, and independently process the judgment results of each channel respectively, when the channel signal on one side is overloaded and the channel signal on the other side is normal, the signal of the channel on one side with the overloaded signal can be transmitted to the ground, the channel on one side with the normal signal can still normally transmit the signal, and the phenomenon that the channel signal on one side is overloaded and the channel signal on the other side is normal so that the channel signals on both sides are transmitted to the ground is effectively avoided.
FIG. 5 is a block diagram illustrating an electronic device in accordance with an example embodiment. As shown in fig. 5, the electronic device may further include a first resistor 31 and a second resistor 32; the first resistor 31 is connected between the fifth interface 105 and the seventh interface 107; the second resistor 32 is connected between the sixth interface 106 and the eighth interface 108.
Because the resistors in the series circuit can perform voltage division and current limitation, the first resistor 31 can divide and limit the voltage of the electrical signal transmitted from the seventh interface 107, and the second resistor 32 can divide and limit the voltage of the electrical signal transmitted from the eighth interface 108, so as to further alleviate the impact of the signal on the codec 10, thereby further effectively prolonging the service life of the codec 10.
Fig. 6 is a block diagram of a first portion of an electronic device shown in an application example. Fig. 7 is a block diagram of a second portion of an electronic device shown in an application example. The first circuit protection module is an OVP chip, and the first submodule and the second submodule are TVS diodes.
As shown in fig. 6, the Codec chip may include an HPH _ L (headphone left channel) 68 pin (an example of a first interface), and an HPH _ R (headphone right channel) 95 pin (an example of a second interface), it should be noted that the pin number and the usage of the Codec chip and the internal circuit structure of the chip may be adjusted according to the circuit protection requirement, as long as the Codec chip includes an interface for inputting and outputting headphone left channel signals and an interface for inputting and outputting headphone right channel signals.
As shown in fig. 7, the OVP chip may include an NC1 pin (an example of a third interface), an NC2 pin (an example of a fourth interface), a COM1 pin (an example of a fifth interface), and a COM2 pin (an example of a sixth interface), and it should be noted that the pin number and the purpose of the OVP chip and the internal circuit structure of the chip may be adjusted according to the need of circuit protection as long as the OVP chip can have an interface for transmitting a headphone left channel signal and an interface for transmitting a headphone right channel signal, respectively. The headphone interface module HPH may include an L interface (an example of a seventh interface) for transmitting a headphone left channel signal and an R interface (an example of an eighth interface) for transmitting a headphone right channel signal.
As shown in fig. 6 and 7, the Codec chip may be connected in series with the OVP chip, wherein the pin HPH _ L may be connected to the pin NC1, the pin HPH _ R may be connected to the pin NC2, the pin COM1 may be connected to the L interface, and the pin COM2 may be connected to the R interface. An R1 resistor (an example of a first resistor) may be connected in series between the COM1 pin and the L interface, an R2 resistor (an example of a second resistor) may be connected in series between the COM2 pin and the R interface, an anode of a TVS diode FV1 (an example of a first submodule) may be connected between the R1 resistor and the COM1 pin, and a cathode of the FV1 may be connected to ground. The anode of the TVS diode FV2 (an example of a second sub-module) may be connected between the R2 resistor and the COM2 pin, and the cathode of the FV2 may be grounded.
The R1 resistor and the R2 resistor can divide and limit the voltage of the electric signals from the L interface and the R interface respectively.
If the voltage value of the electric signal subjected to current limiting and voltage dividing through the R1 resistor and the R2 resistor is smaller than the protection threshold value of the OVP chip, the FV1 and the FV1 are in an open circuit state, the OVP chip is in a pass state, the electric signal from the L interface is conducted to the HPH _ L interface through the COM1 interface and the NC1 interface respectively, the electric signal from the R interface is conducted to the HPH _ R interface through the COM2 interface and the NC2 interface respectively, and the Codec chip performs coding and decoding processing according to the received signal.
If the voltage value of the electric signal subjected to current limiting and voltage dividing through the R1 resistor and the R2 resistor is smaller than the breakdown threshold of FV1 and FV2 and larger than the protection threshold of the OVP chip, FV1 and FV1 are in an open-circuit state, the electric signal is conducted to the OVP chip, and the OVP chip recognizes the electric signal and automatically breaks to form open protection, so that the electric signal does not impact a Codec chip, and the Codec chip is prevented from being damaged by surge electric signals or direct current signals with large energy.
If the voltage value of the electric signal of the current-limiting voltage division through the resistor R1 and the resistor R2 reaches the breakdown threshold values of FV1 and FV2, FV1 and FV1 are in a pass state, FV1 can transmit the electric signal from the L interface to the ground, and FV2 can transmit the electric signal from the R interface to the ground. Thus, the electrical signal will not impact the Codec chip, thereby preventing the damage of the Codec chip caused by the surge electrical signal with large energy.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. An electronic device, comprising: the device comprises a codec, an earphone interface module and a first circuit protection module;
the first circuit protection module is connected between the codec and the earphone interface module, and is used for forming an open circuit when detecting that a parameter value of an electric signal from the earphone interface module meets a first condition so as to prevent the electric signal from the earphone interface module from being conducted to the codec.
2. The electronic device of claim 1, further comprising: a second circuit protection module;
the second circuit protection module is connected between the earphone interface module and the ground, and is used for forming a path to transmit the electric signal from the earphone interface module to the ground when detecting that the parameter value of the electric signal from the earphone interface module meets a second condition.
3. The electronic device of claim 1, wherein the codec comprises a first interface and a second interface, wherein the first circuit protection module comprises a third interface, a fourth interface, a fifth interface, and a sixth interface, and wherein the headset interface module comprises a seventh interface and an eighth interface;
the first interface is connected with the third interface, the fifth interface is connected with the seventh interface, the second interface is connected with the fourth interface, and the sixth interface is connected with the eighth interface;
when detecting that the parameter value of the electrical signal received by the fifth interface meets a first condition, the first circuit protection module forms an open circuit to prevent the electrical signal received by the fifth interface from being conducted to the codec;
the first circuit protection module forms an open circuit when detecting that the parameter value of the electrical signal received by the sixth interface meets a first condition, so as to prevent the electrical signal received by the sixth interface from being conducted to the codec.
4. The electronic device of claim 3, further comprising: a second circuit protection module comprising a first sub-module and a second sub-module;
the first sub-module is connected between the fifth interface and the ground, and when detecting that the parameter value of the received electric signal meets a second condition, the first sub-module forms a passage to transmit the electric signal received by the first sub-module to the ground;
the second submodule is connected between the sixth interface and the ground, and when detecting that the parameter value of the received electric signal meets a second condition, the second submodule forms a path so as to transmit the electric signal received by the second submodule to the ground.
5. The electronic device of claim 3, further comprising a first resistor and a second resistor;
the first resistor is connected between the fifth interface and the seventh interface;
the second resistor is connected between the sixth interface and the eighth interface.
6. The electronic device of any one of claims 1-5, wherein the first circuit protection module comprises an over-voltage protection chip or an over-current protection chip.
7. The electronic device of claim 2 or 4, wherein the second circuit protection module comprises a transient suppression diode or a varistor.
8. The electronic device of claim 1, wherein the first condition comprises: the voltage value of the electric signal is greater than or equal to the first voltage threshold value, or the current value of the electric signal is greater than or equal to the first current threshold value.
9. The electronic device of claim 2, wherein the second condition comprises: the voltage value of the electric signal is greater than or equal to the second voltage threshold value, or the current value of the electric signal is greater than or equal to the second current threshold value.
10. The electronic device of claim 3, wherein the first interface and the second interface are configured to transmit headphone left and right channel signals, respectively, and the seventh interface and the eighth interface are configured to transmit headphone left and right channel signals, respectively.
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| CN201910103612.6A CN111525499A (en) | 2019-02-01 | 2019-02-01 | Electronic device |
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| CN201910103612.6A CN111525499A (en) | 2019-02-01 | 2019-02-01 | Electronic device |
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| CN111525499A true CN111525499A (en) | 2020-08-11 |
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| CN201910103612.6A Pending CN111525499A (en) | 2019-02-01 | 2019-02-01 | Electronic device |
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| Country | Link |
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| CN (1) | CN111525499A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140019498A (en) * | 2012-08-06 | 2014-02-17 | 삼성전자주식회사 | Mobile terminal being capable to prevent its damage by surge |
| CN206323526U (en) * | 2016-12-06 | 2017-07-11 | 广东欧珀移动通信有限公司 | Earphone interface circuit and terminal device |
| CN107634510A (en) * | 2017-09-30 | 2018-01-26 | 深圳市艾特智能科技有限公司 | Chip interface circuit |
-
2019
- 2019-02-01 CN CN201910103612.6A patent/CN111525499A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140019498A (en) * | 2012-08-06 | 2014-02-17 | 삼성전자주식회사 | Mobile terminal being capable to prevent its damage by surge |
| CN206323526U (en) * | 2016-12-06 | 2017-07-11 | 广东欧珀移动通信有限公司 | Earphone interface circuit and terminal device |
| CN107634510A (en) * | 2017-09-30 | 2018-01-26 | 深圳市艾特智能科技有限公司 | Chip interface circuit |
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Application publication date: 20200811 |