CN111245985B - Distance sensing circuit and mobile terminal - Google Patents
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- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
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Abstract
The application provides a distance sensing circuit, which comprises a microphone, a filtering module and a distance sensing chip which are connected in sequence; the microphone comprises a first grounding end, an input end and an output end, wherein the output end is connected with the filtering module, the first grounding end is grounded, and the input end is connected with a power supply; the filtering module comprises a first inductor and a first capacitor which are connected in series, a second grounding end is arranged between the first inductor and the first capacitor and used for grounding, and the filtering module is used for filtering interference signals of the microphone to the distance sensing chip. This application will be connected apart from the response chip with the microphone through filter module, reaches the certain distance between finger and the microphone, and apart from the response chip will respond, make mobile terminal get into the amortization state completely to guarantee that user's information is not revealed and more laminate user's in-service use custom, promote user experience.
Description
Technical Field
The application relates to the technical field of communication, in particular to a distance sensing circuit and a mobile terminal.
Background
In daily life, when people use the mobile phone to talk, the situation that other people suddenly talk with the people can happen, but if the opposite party in the talking is talking, the opposite party is inconvenient to hang up the phone directly, and at this time, if the people do not want to let the opposite party know the talking content of the people, the sound is needed to be silenced.
At present, can carry out the amortization through the amortization button on the cell-phone, only the operation button can need to take 2 seconds to react, so in user's in-service use, we habitual operation is directly to plug up the microphone with the hand and carry out the amortization, but plug up the microphone with the hand and can not complete amortization, still have the risk that partial user sound reveals, and the noise cancelling effect is unreliable.
Disclosure of Invention
The application provides a apart from induction circuit and mobile terminal aims at solving and directly plugs up the microphone with the hand and when carrying out the amortization, the amortization incompletely leads to the technical problem that partial sound reveals.
The technical scheme provided by the application is as follows:
the application provides a distance sensing circuit, which comprises a microphone, a filtering module and a distance sensing chip which are sequentially connected;
the microphone comprises a first grounding end, an input end and an output end, wherein the output end is connected with the filtering module, the first grounding end is grounded, and the input end is connected with a power supply;
the filter module comprises a first inductor and a first capacitor which are connected in series, a second grounding end is arranged between the first inductor and the first capacitor and used for grounding, and the filter module is used for filtering out interference signals of the distance sensing chip from the microphone.
In the distance sensing circuit of the application, the output end is connected with the first capacitor, and the distance sensing chip is connected with the first inductor.
In the distance sensing circuit of the application, the output end is connected with the first inductor, and the distance sensing chip is connected with the first capacitor.
In the distance sensing circuit of the application, a second capacitor is arranged between the grounding end and the ground and used for tuning the distance sensing circuit.
In the distance sensing circuit of the present application, the inductance of the first inductor includes 1 nH.
In the distance sensing circuit of the present application, the capacitance value of the first capacitor comprises 33 pF.
The application also provides a mobile terminal, including casing and the distance sensing circuit of above-mentioned arbitrary, including a microphone sound receiving hole on the casing, the microphone sound receiving hole with the microphone corresponds the setting.
In the mobile terminal of the present application, the microphone acoustic hole and the distance between the microphones are 5 mm.
In the mobile terminal of the application, the mobile terminal comprises a processor, and the processor is connected with the distance sensing chip and used for closing the microphone according to a silencing instruction generated by the distance sensing chip.
In the mobile terminal of the application, a second inductor is arranged between the processor and the distance sensing chip and is used for tuning the distance sensing circuit.
The beneficial effect of this application does: different from the prior art, the distance sensing circuit provided by the application comprises a microphone, a filtering module and a distance sensing chip which are sequentially connected; the microphone comprises a first grounding end, an input end and an output end, wherein the output end is connected with the filtering module, the first grounding end is grounded, and the input end is connected with the power supply; the filtering module comprises a first inductor and a first capacitor which are connected in series, a second grounding end is arranged between the first inductor and the first capacitor and used for grounding, and the filtering module is used for filtering interference signals of the microphone to the distance sensing chip. This application will be connected apart from the response chip with the microphone through filter module, reaches the certain distance between finger and the microphone, and apart from the response chip will respond, make mobile terminal get into the amortization state completely to guarantee that user's sound is not revealed and more laminate user's in-service use custom, promote user experience.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a distance sensing circuit according to an embodiment of the present disclosure;
fig. 2 is another schematic structural diagram of a distance sensing circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments that can be implemented by the application. Directional phrases used in this application, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting. In the drawings, elements having similar structures are denoted by the same reference numerals.
It should be noted that the thicknesses and shapes in the drawings of the present application do not reflect actual proportions, but are merely intended to schematically illustrate the contents of the embodiments of the present application.
Because communication products on the market are all button amortization in the design of user's conversation amortization at present, but button amortization needs reaction time, and in fact, the user all covers the words bobbin opening with the finger directly, but, covers the words bobbin opening with the hand and can not completely amortize, still has the risk of sound leakage. To above-mentioned problem, this application provides a apart from induction circuit, when aiming at solving and directly plugging up the microphone with the hand and carrying out the amortization, the amortization leads to the technical problem that partial information reveals incompletely.
The present application provides a distance sensing circuit, please refer to fig. 1, fig. 1 is a schematic structural diagram of the distance sensing circuit provided in the present application, as shown in fig. 1, the distance sensing circuit 100 includes a microphone 10, a filtering module 20 and a distance sensing chip 30, which are sequentially connected, wherein the microphone 10 includes a first ground terminal 13, an input terminal 12 and an output terminal 11, the output terminal 11 is connected to the filtering module 20, the first ground terminal 13 is grounded, the input terminal 12 is connected to a power supply, the filtering module 20 includes a first inductor 21 and a first capacitor 22 connected in series, a second ground terminal 23 is disposed between the first inductor 21 and the first capacitor 22, the second ground terminal 23 is used for grounding, and the filtering module 20 is used for filtering out an interference signal of the microphone 10 to the distance sensing chip 30.
In this embodiment, the distance sensing chip 30 may be a capacitive distance sensing chip, because the microphone 10 is generally made of metal, a human body approaching metal will generate an obvious capacitance change, and when a finger and the microphone 10 generate a capacitance change at a fixed distance, the capacitive distance sensing chip will be triggered to respond.
Specifically, an inductive capacitor exists between any two conductive objects, and a microphone and the ground can also form an inductive capacitor, and under the condition that the surrounding environment is not changed, the value of the inductive capacitor is a fixed and unchangeable tiny value. When the human finger is close to the microphone, the inductive capacitance formed by the human finger and the earth is connected in parallel with the inductive capacitance formed by the microphone and the earth, so that the total inductive capacitance value is increased. By utilizing the principle, when people use the mobile phone to talk, if people around suddenly find the important things, but the phone is inconvenient to hang up, the mobile phone microphone can be plugged by hands, and is generally made of metal, so that the induction capacitance value can be increased, and the capacitance distance induction chip outputs a silencing signal after detecting that the induction capacitance value is changed.
Specifically, the material of the microphone 10 may also be conductive foam, conductive ink, conductive rubber, conductive glass, or the like.
The conductive foam is formed by wrapping conductive cloth on flame-retardant sponge, and after a series of treatments, the conductive cloth has good surface conductivity and can be easily fixed on a device to be shielded by an adhesive tape. There are different cross-sectional shapes, mounting methods, UL grades and shielding materials available for selection.
Conductive ink (electrically conductive printing ink) is paste ink made by dispersing conductive materials (gold, silver, copper and carbon) in a vehicle, commonly called paste ink. Has a certain degree of conductive property, and can be used for printing conductive points or conductive circuits. Gold-based conductive inks, silver-based conductive inks, copper-based conductive inks, carbon-based conductive inks, and the like have been put into practical use and used for materials such as printed circuits, electrodes, plating primers, keyboard contacts, printed resistors, and the like.
The conductive rubber is prepared by uniformly distributing conductive particles such as silver-plated glass, silver-plated aluminum, silver and the like in silicone rubber, and enabling the conductive particles to be contacted through pressure so as to achieve good conductive performance.
Ordinary glass is an insulating material, and a conductive film (ITO film) is plated on the surface of the ordinary glass, so that the ordinary glass has conductivity. This is the conductive glass. Indium tin oxide transparent conductive film glass passes through an ITO conductive film glass production line, and in a highly purified factory environment, an indium tin oxide conductive film coating is sputtered on ultrathin glass by using a planar magnetron technology and is subjected to high-temperature annealing treatment to obtain a high-technology product.
In this embodiment, the output terminal 11 of the microphone 10 is connected to the first capacitor 22, and the distance sensing chip 30 is connected to the first inductor 21.
In this embodiment, the capacitance of the first capacitor 22 may be 33pF, because the operating frequency range of the microphone 10 is 80Hz to 20KHz, and the operating frequency of the capacitive distance sensing chip is 500Hz, the capacitor with 33pF can avoid the interference of the microphone 10 to the capacitive distance sensing chip.
In this embodiment, the inductance of the first inductor 21 may be 1nH, and a high-frequency interference signal above 500Hz may be filtered out by using an inductor of 1 nH.
In this embodiment, a second capacitor 24 is disposed between the second ground terminal 23 and the ground for tuning the distance sensing circuit 10, and a capacitance value of the second capacitor 24 is not limited herein.
Specifically, the capacitance value of the first capacitor 22 and the inductance value of the first inductor 21 are not limited herein, and are required to be tuned for different systems or platforms, that is, the capacitance value of the first capacitor 22, the inductance value of the first inductor 21, and the capacitance value of the second capacitor 24 need to be adjusted.
Be different from prior art, the distance sensing circuit 10 that this application provided, including the microphone 10 that connects gradually, filter module 20 and distance sensing chip 30, wherein, microphone 10 includes first earthing terminal 13, input 12 and output 11, output 11 is connected with filter module 20, first earthing terminal 13 ground connection, input 12 is connected with the power, filter module 20 is including first inductance 21 and the first electric capacity 22 of establishing ties, and be equipped with second earthing terminal 23 between first inductance 21 and first electric capacity 22, second earthing terminal 23 is used for the ground connection, filter module is used for filtering the interfering signal of microphone 10 to distance sensing chip 30. This application will be connected apart from the response chip with the microphone through filter module, reaches the certain distance between finger and the microphone, and apart from the response chip will respond, make mobile terminal get into the amortization state completely to guarantee that user's sound is not revealed and more laminate user's in-service use custom, promote user experience.
The present application further provides a distance sensing circuit, please refer to fig. 2, fig. 2 is another schematic structural diagram of the distance sensing circuit provided in the present application, as shown in fig. 2, the distance sensing circuit 100 includes a microphone 10, a filtering module 20 and a distance sensing chip 30, which are sequentially connected, the microphone 10 includes a first ground terminal 13, an input terminal 12 and an output terminal 11, the output terminal 11 is connected to the filtering module 20, the first ground terminal 13 is grounded, the input terminal 12 is connected to a power supply, the filtering module 20 includes a first inductor 21 and a first capacitor 22 connected in series, a second ground terminal 23 is disposed between the first inductor 21 and the first capacitor 22, the second ground terminal 23 is used for grounding, and the filtering module is used for filtering out an interference signal of the microphone 10 to the distance sensing chip 30.
In this embodiment, the distance sensing chip 30 can be a capacitive distance sensing chip, because the microphone is generally made of metal, a human body can generate an obvious capacitance change when approaching metal, and when the finger and the microphone 10 generate a capacitance change at a fixed distance, the capacitive distance sensing chip is triggered to respond.
Specifically, an inductive capacitor exists between any two conductive objects, and a microphone and the ground can also form an inductive capacitor, and under the condition that the surrounding environment is not changed, the value of the inductive capacitor is a fixed and unchangeable tiny value. When the human finger is close to the microphone, the inductive capacitance formed by the human finger and the earth is connected in parallel with the inductive capacitance formed by the microphone and the earth, so that the total inductive capacitance value is increased. By utilizing the principle, when people use the mobile phone to talk, if people around suddenly find the important things, but the phone is inconvenient to hang up, the mobile phone microphone can be plugged by hands, and is generally made of metal, so that the induction capacitance value can be increased, and the capacitance distance induction chip outputs a silencing signal after detecting that the induction capacitance value is changed.
Specifically, the material of the microphone 10 may also be conductive foam, conductive ink, conductive rubber, conductive glass, or the like.
The conductive foam is formed by wrapping conductive cloth on flame-retardant sponge, and after a series of treatments, the conductive cloth has good surface conductivity and can be easily fixed on a device to be shielded by an adhesive tape. There are different cross-sectional shapes, mounting methods, UL grades and shielding materials available for selection.
Conductive ink (electrically conductive printing ink) is paste ink made by dispersing conductive materials (gold, silver, copper and carbon) in a vehicle, commonly called paste ink. Has a certain degree of conductive property, and can be used for printing conductive points or conductive circuits. Gold-based conductive inks, silver-based conductive inks, copper-based conductive inks, carbon-based conductive inks, and the like have been put into practical use and used for materials such as printed circuits, electrodes, plating primers, keyboard contacts, printed resistors, and the like.
The conductive rubber is prepared by uniformly distributing conductive particles such as silver-plated glass, silver-plated aluminum, silver and the like in silicone rubber, and enabling the conductive particles to be contacted through pressure so as to achieve good conductive performance.
Ordinary glass is an insulating material, and a conductive film (ITO film) is plated on the surface of the ordinary glass, so that the ordinary glass has conductivity. This is the conductive glass. Indium tin oxide transparent conductive film glass passes through an ITO conductive film glass production line, and in a highly purified factory environment, an indium tin oxide conductive film coating is sputtered on ultrathin glass by using a planar magnetron technology and is subjected to high-temperature annealing treatment to obtain a high-technology product.
In this embodiment, the output terminal 11 of the microphone 10 is connected to the first inductor 21, and the distance sensing chip 30 is connected to the first capacitor 22.
In this embodiment, the capacitance of the first capacitor 22 may be 33pF, because the operating frequency range of the microphone 10 is 80Hz to 20KHz, and the operating frequency of the capacitive distance sensing chip is 500Hz, the capacitor with 33pF can avoid the interference of the microphone 10 to the capacitive distance sensing chip.
In this embodiment, the inductance of the first inductor 21 may be 1nH, and a high-frequency interference signal above 500Hz may be filtered out by using an inductor of 1 nH.
In this embodiment, a second capacitor (not shown) is disposed between the second ground and the ground for tuning the distance sensing circuit 10, and a capacitance value of the second capacitor is not limited herein.
Specifically, the capacitance value of the first capacitor 22 and the inductance value of the first inductor 21 are not limited herein, and are required to be tuned for different systems or platforms, that is, the capacitance value of the first capacitor 22, the inductance value of the first inductor 21, and the capacitance value of the second capacitor need to be adjusted.
Be different from prior art, the distance sensing circuit 10 that this application provided, including the microphone 10 that connects gradually, filter module 20 and distance sensing chip 30, wherein, microphone 10 includes first earthing terminal 13, input 12 and output 11, output 11 is connected with filter module 20, first earthing terminal 13 ground connection, input 12 is connected with the power, filter module 20 is including first inductance 21 and the first electric capacity 22 of establishing ties, and be equipped with second earthing terminal 23 between first inductance 21 and first electric capacity 22, second earthing terminal 23 is used for the ground connection, filter module is used for filtering the interfering signal of microphone 10 to distance sensing chip 30. This application will be connected apart from the response chip with the microphone through filter module, reaches the certain distance between finger and the microphone, and apart from the response chip will respond, make mobile terminal get into the amortization state completely to guarantee that user's sound is not revealed and more laminate user's in-service use custom, promote user experience.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention, and as shown in fig. 3, the mobile terminal 20 includes a housing 21 and any one of the distance sensing circuits (not shown), the housing 21 includes a microphone sound receiving hole 211, and the microphone sound receiving hole 211 is disposed corresponding to a microphone (not shown).
In some embodiments, the distance between the microphone acoustic port 211 and the microphone may be 5 mm.
In some embodiments, the housing 21 may be a metal housing, such as a metal such as magnesium alloy, stainless steel, and the like. It should be noted that the material of the housing 21 in the embodiment of the present application is not limited to this, and other methods may also be adopted, such as a plastic housing, a ceramic housing, or a housing structure in which metal and plastic are matched with each other, specifically, the metal part may be formed first, such as forming a magnesium alloy substrate by injection molding, and then injecting plastic on the magnesium alloy substrate to form a plastic substrate, so as to form a complete housing structure.
In this embodiment, the distance sensing circuit (not shown in the figure) includes a microphone (not shown in the figure), a filtering module (not shown in the figure) and a distance sensing chip (not shown in the figure) that are connected in sequence, wherein the microphone includes a first grounding terminal (not shown in the figure), an input terminal (not shown in the figure) and an output terminal (not shown in the figure), the output terminal is connected with the filtering module, the first grounding terminal is grounded, the input terminal is connected with a power supply (not shown in the figure), the filtering module includes a first inductor (not shown in the figure) and a first capacitor (not shown in the figure) that are connected in series, and a second grounding terminal (not shown in the figure) is disposed between the first inductor and the first capacitor, the second grounding terminal is used for grounding (not shown in the figure).
In this embodiment, the distance sensing chip may be a capacitive distance sensing chip, because the microphone is generally made of metal, a human body can generate an obvious capacitance change when approaching metal, and when the finger and the microphone generate a capacitance change at a fixed distance, the capacitive distance sensing chip is triggered to respond.
Specifically, an inductive capacitor exists between any two conductive objects, and a microphone and the ground can also form an inductive capacitor, and under the condition that the surrounding environment is not changed, the value of the inductive capacitor is a fixed and unchangeable tiny value. By utilizing the principle, when people use the mobile phone to talk, if people around suddenly find the important things, but the phone is inconvenient to hang up, the mobile phone microphone can be plugged by hands, and is generally made of metal, so that the induction capacitance value can be increased, and the capacitance distance induction chip outputs a silencing signal after detecting that the induction capacitance value is changed. When the human finger is close to the microphone, the inductive capacitance formed by the human finger and the earth is connected in parallel with the inductive capacitance formed by the microphone and the earth, so that the total inductive capacitance value is increased. The capacitance distance sensing chip outputs a silencing signal after detecting that the value of the sensing capacitor changes.
In the present embodiment, the mobile terminal 20 includes a processor (not shown in the figure), and the processor is connected to the distance sensing chip in the distance sensing circuit for processing the instruction of the distance sensing chip.
Specifically, when the distance sensing chip outputs a silencing signal, the processor rapidly processes the silencing signal, so that the mobile terminal is in a silencing state.
In some embodiments, the output terminal of the microphone may be connected to the first capacitor, and the distance sensing chip is connected to the first inductor.
In some embodiments, the output terminal of the microphone may be connected to the first inductor, and the distance sensing chip is connected to the first capacitor.
In some embodiments, the capacitance of the first capacitor may be 33pF, because the operating frequency range of the microphone is 80Hz to 20KHz and the operating frequency of the capacitive distance sensing chip is 500Hz, and the 33pF capacitor may be used to avoid the interference of the microphone to the capacitive distance sensing chip.
In some embodiments, the inductance of the first inductor may be 1nH, and a high-frequency interference signal above 500Hz may be filtered out by using an inductor of 1 nH.
Specifically, the capacitance value of the first capacitor and the inductance value of the first inductor are not limited herein, and the capacitance value of the first capacitor, the inductance value of the first inductor, and the capacitance value of the second capacitor need to be adjusted for different systems or platforms.
In this embodiment, a second inductor (not shown) is disposed between the processor and the distance sensing chip.
In particular, the inductance of the second inductor is not limited herein, and may need to be tuned for different systems or platforms, i.e. the inductance of the second inductor needs to be changed.
In this embodiment, the mobile terminal 20 further includes a memory (not shown in the figure) for storing application programs and data. The memory stores an application program having executable program code embodied therein. The application programs may constitute various functional modules.
In this embodiment, the mobile terminal 20 further includes a processor (not shown) for executing an application program stored in the memory, thereby performing various functional applications and data processing.
In this embodiment, the mobile terminal 20 further includes a display unit (not shown) for displaying information input to the mobile terminal by the user or information provided to the user, as well as various graphical user interfaces of the mobile terminal. These graphical user interfaces may be made up of graphics, text, icons, video, and any combination thereof. The display unit may include a display panel.
The processor is the control center of the mobile terminal. The processor connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by running or executing an application program stored in the memory and calling data stored in the memory, thereby integrally monitoring the mobile terminal.
Specifically, the housing 21 is also used to house devices such as a distance sensing circuit, a memory, a display unit, and a processor.
In particular, the mobile terminal 20 further includes at least one sensor (not shown), such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel according to the brightness of ambient light, and a proximity sensor that turns off the display panel and/or the backlight when the mobile terminal 20 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.
In addition, the mobile terminal may further include a camera module, a bluetooth module, an input module, a wireless fidelity module, and the like, which are not described herein again.
In the above embodiments, the mobile terminal includes, but is not limited to, a smart phone, a tablet computer, and the like.
Different from the prior art, the mobile terminal 20 provided by the present application includes a housing 21 and a distance sensing circuit (not shown in the figure), the housing 21 includes a microphone sound receiving hole 211, and the microphone sound receiving hole 211 corresponds to a microphone (not shown in the figure). This application is through setting up apart from induction circuit in mobile terminal, at user's conversation in-process, if want the amortization, can directly plug up the microphone sound receiving hole with the hand to trigger apart from the response chip response, make the cell-phone system thoroughly amortization immediately, both guarantee that user's sound is not revealed and laminate user's in-service use custom again, promote user experience.
In addition to the above embodiments, other embodiments are also possible. All technical solutions formed by using equivalents or equivalent substitutions fall within the protection scope of the claims of the present application.
In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.
Claims (10)
1. A distance sensing circuit is characterized in that the distance sensing circuit is arranged on a mobile terminal and comprises a microphone, a filtering module and a distance sensing chip which are sequentially connected;
the microphone comprises a first grounding end, an input end and an output end, wherein the output end is connected with the filtering module, the first grounding end is grounded, and the input end is connected with a power supply;
the filtering module comprises a first inductor and a first capacitor which are connected in series, a second grounding end is arranged between the first inductor and the first capacitor and used for grounding, and the filtering module is used for filtering out interference signals of the microphone to the distance sensing chip;
the distance sensing chip is a capacitance type distance sensing chip and is used for detecting the change of a sensing capacitor between the microphone and the finger of the human body and outputting a silencing signal when the change of the capacitance is sensed so that the processor of the mobile terminal can control the microphone to be closed according to the silencing signal.
2. The distance sensing circuit of claim 1, wherein said output terminal is connected to said first capacitor, and said distance sensing chip is connected to said first inductor.
3. The distance sensing circuit of claim 1, wherein said output terminal is connected to said first inductor and said distance sensing chip is connected to said first capacitor.
4. The distance sensing circuit of claim 1, wherein a second capacitor is provided between said second ground terminal and ground for tuning said distance sensing circuit.
5. The distance sensing circuit of claim 1, wherein an inductance of said first inductor comprises 1 nH.
6. The distance sensing circuit of claim 1, wherein a capacitance value of said first capacitor comprises 33 pF.
7. A mobile terminal, characterized in that the mobile terminal comprises a housing, a processor and the distance sensing circuit according to any one of claims 1 to 6, wherein the housing comprises a microphone sound receiving hole, the microphone sound receiving hole is arranged corresponding to the microphone, and the processor is configured to close the microphone according to the silencing instruction.
8. The mobile terminal of claim 7, wherein the microphone acoustic opening and the microphone are separated by a distance of 5 mm.
9. The mobile terminal of claim 7, wherein the processor is coupled to the distance sensing chip.
10. The mobile terminal of claim 9, wherein a second inductor is disposed between the processor and the distance sensing chip for tuning the distance sensing circuit.
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| CN202010058302.XA CN111245985B (en) | 2020-01-19 | 2020-01-19 | Distance sensing circuit and mobile terminal |
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| CN202010058302.XA CN111245985B (en) | 2020-01-19 | 2020-01-19 | Distance sensing circuit and mobile terminal |
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| CN111245985A CN111245985A (en) | 2020-06-05 |
| CN111245985B true CN111245985B (en) | 2021-02-26 |
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| JP4201723B2 (en) * | 2004-02-13 | 2008-12-24 | 東京エレクトロン株式会社 | Capacitance detection type sensor element |
| CN103546647B (en) * | 2013-10-31 | 2015-07-08 | 宇龙计算机通信科技(深圳)有限公司 | Method and device for communication through mobile phone |
| US9401239B2 (en) * | 2014-04-17 | 2016-07-26 | Electroninks Writeables, Inc. | Electrical component for attachment to paper and other substrates and magnetic attachment mechanism |
| CN105516503A (en) * | 2015-12-17 | 2016-04-20 | 魅族科技（中国）有限公司 | Communication control method and communication control device |
| CN206433108U (en) * | 2016-12-31 | 2017-08-22 | 肇庆高新区黑阳科技有限公司 | Energy-conservation microphone based on capacitance touch inductor |
| US10474417B2 (en) * | 2017-07-20 | 2019-11-12 | Apple Inc. | Electronic device with sensors and display devices |
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