CN109040424B - Antenna switching circuit, method, terminal and computer readable storage medium - Google Patents
Antenna switching circuit, method, terminal and computer readable storage medium Download PDFInfo
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- CN109040424B CN109040424B CN201810684037.9A CN201810684037A CN109040424B CN 109040424 B CN109040424 B CN 109040424B CN 201810684037 A CN201810684037 A CN 201810684037A CN 109040424 B CN109040424 B CN 109040424B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
Abstract
The invention discloses an antenna switching circuit, a method, a terminal and a computer readable storage medium, relating to the technical field of communication, wherein the antenna switching circuit comprises: the earphone comprises an earphone external detection module, a switch switching control module, a first antenna and a second antenna; the earphone external detection module is used for switching an earphone detection level signal when detecting that an earphone is inserted, and outputting the earphone detection level signal to the switch switching control module; the switch switching control module is used for controlling the first antenna to be switched into a main antenna set when the earphone detects the level signal switching; wherein the distance of the first antenna from the earphone is greater than the distance of the second antenna from the earphone. The invention solves the technical problem of TDD _ NOISE generated in the earphone mode because the antenna near the earphone is switched to the main set antenna, and improves the communication experience of users.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an antenna switching circuit, an antenna switching method, a terminal, and a computer-readable storage medium.
Background
Time Division Distortion (TDD) noise is a common noise for mobile terminals. The reason for this is that, when a global system for mobile communications (GSM) signal is transmitted at a frequency of 216.8Hz every 1/216.8 seconds (i.e. at a Power amplifier (Power amplifier) end of a radio frequency transmitting module of a mobile terminal, an envelope noise is generated (envelope) when an operating band of the GSM signal may include 900MHz, 1800MHz or 1900 MHz). Since the human ear has an audible frequency range of 20Hz to 20KHz, and the PA generates an envelope (envelope) noise of 216.8Hz when transmitting, the frequency of the noise falls within the audible range of the human ear.
The audio signal transmission between the mobile terminal and the earphone connected with the mobile terminal is divided into uplink transmission and downlink transmission from a signal path. The uplink channel transmission means that voice is converted into an electric signal at a microphone end of an earphone, and the electric signal reaches a decoder (code) of a system end (mobile terminal) through a channel; the reverse downlink transmission means that the audio analog signals are transmitted from a decoder at the system end and reach left and right channels of the earphone through the channel.
The earphone of the existing terminal is often arranged at the bottom or the top of a mobile phone body, and when the earphone is located in a terminal GSM antenna coverage area, for example, the terminal antenna is located at the bottom of the terminal, and an earphone socket is also located at the bottom of the terminal, when the earphone socket is located in an electromagnetic field coverage area of the antenna, the earphone is often interfered by GSM radio frequency signals, and downlink or uplink of the earphone is affected by TDD _ NOISE in an earphone mode. Because the earphone is various in types and different in design, the problem of the earphone is often serious compared with other audio devices.
Generally, a terminal, such as a mobile phone antenna, is composed of a wireless rf antenna, i.e. a main antenna, which performs the functions of transmitting and receiving rf signals, and the main antenna is mostly placed at the bottom of the mobile phone, but the performance of the antenna is reduced because a user holds the bottom of the mobile phone with his hand in most cases. Therefore, the mobile phone mostly adopts an intelligent double-antenna scheme at present, namely a main diversity antenna which can be split into the main diversity antenna and a diversity antenna. The main set antenna is responsible for sending and receiving radio frequency signals; the diversity antenna is only responsible for receiving signals but not transmitting signals, and the base station combines the signals received from the two interfaces, thereby obtaining diversity gain. The main antenna and the diversity antenna can be used as main antennas, and the antennas can be freely switched according to the condition of detecting signals received by the two antennas. For example, a vendor designed a switching mechanism: when the system detects that the antenna signal at one end is covered and weakened to a certain value, the system actively switches to the other antenna operation, so that the problem that the antenna signal is weakened in the using process is perfectly solved.
In the design, the antennas near the earphone can be used as main antennas, and the radiation influence of the antennas in the GSM system on the earphone can be formed, so that the TDD _ NOISE problem in the earphone mode is generated.
Disclosure of Invention
The present invention is directed to an antenna switching circuit, a method, a terminal and a computer readable storage medium, which are used to solve the technical problem of TDD _ NOISE generated in an earphone mode when an antenna near an earphone is switched to a main antenna.
To achieve the above object, an aspect of the present invention provides an antenna switching circuit, including: the earphone comprises an earphone external detection module, a switch switching control module, a first antenna and a second antenna; the input end of the switch switching control module is connected with the output end of the earphone external detection module, and the output end of the switch switching control module is respectively connected with the first antenna and the second antenna;
the earphone external detection module is used for switching an earphone detection level signal when detecting that an earphone is inserted, and outputting the earphone detection level signal to the switch switching control module;
the switch switching control module is used for controlling the first antenna to be switched into a main antenna set when the earphone detects the level signal switching;
wherein the distance of the first antenna from the earphone is greater than the distance of the second antenna from the earphone.
Further, the switch switching control module includes: the input end of the first logic gate circuit is respectively connected with the output end of the earphone external detection module and the first output end of the baseband processing module, the output end of the first logic gate circuit is connected with the input end of the double-pole double-throw switch, and the output end of the double-pole double-throw switch is respectively connected with the first antenna and the second antenna;
the earphone external detection module outputs an earphone detection level signal to the first logic gate circuit;
a first output end of the baseband processing module inputs a global system for mobile communications (GSM) call level signal to the first logic gate circuit through a first general purpose input/output (GPIO) 1;
when the earphone external detection module detects that an earphone is inserted, a first level signal is output to the first logic gate circuit, and the double-pole double-throw switch is controlled to enable a signal of the first antenna switched into the main antenna to be the first level signal, wherein the first level signal is a high level signal or a low level signal.
Further, the switch switching control module further comprises a second logic gate circuit; the input end of the second logic gate circuit is respectively connected with the output end of the first logic gate circuit and the second output end of the baseband processing module, and the output end of the second logic gate circuit is connected with the input end of the double-pole double-throw switch;
a second output end of the baseband processing module inputs a double-pole double-throw switch control signal to the second logic gate circuit through a second general purpose input/output GPIO 2;
when the earphone external detection module detects that an earphone is inserted, the output signal of the second logic gate circuit is controlled by the output signal of the first logic gate circuit; when the earphone external detection module does not detect the insertion of an earphone, the output signal of the second logic gate circuit is controlled by the output signal of the GPIO 2.
Further, the earphone is an NO type earphone;
the earphone external detection module outputs an earphone detection level signal as a low level signal when the insertion of the earphone is detected, and outputs the earphone detection level signal as a high level signal when the insertion of the earphone is not detected;
the baseband processing module controls the GPIO1 to output a low level signal when the GSM is in a call state, and controls the GPIO1 to output a high level signal when the GSM is in a non-call state;
the first logic gate circuit is an OR gate circuit, and the second logic gate circuit is an AND gate circuit;
and controlling the double-pole double-throw switch to switch the first antenna into a signal of a main set antenna, wherein the signal is a low-level signal.
Further, the earphone is an NC type earphone;
the earphone external detection module outputs an earphone detection level signal as a high level signal when the insertion of the earphone is detected, and outputs the earphone detection level signal as a low level signal when the insertion of the earphone is not detected;
the baseband processing module controls the GPIO1 to output a high level signal when the GSM is in a call state, and controls the GPIO1 to output a low level signal when the GSM is in a non-call state;
the first logic gate circuit is an AND gate circuit, and the second logic gate circuit is an OR gate circuit;
and controlling the double-pole double-throw switch to switch the first antenna into a signal of a main set antenna, wherein the signal is a high-level signal.
The invention also provides an antenna switching method, which is applied to an antenna switching circuit, and the antenna switching circuit comprises: the earphone comprises an earphone external detection module, a switch switching control module, a first antenna and a second antenna; the input end of the switch switching control module is connected with the earphone external detection module, and the output end of the switch switching control module is respectively connected with the first antenna and the second antenna; the method comprises the following steps:
when detecting that the earphone is inserted, switching an earphone detection level signal;
when the earphone detects the level signal switching, controlling to switch the first antenna to a main antenna;
wherein the distance from the first antenna to the earphone is greater than the distance from the second antenna to the earphone.
Further, the switch switching control module includes: the input end of the first logic gate circuit is respectively connected with the output end of the earphone external detection module and the first output end of the baseband processing module, the output end of the first logic gate circuit is connected with the input end of the double-pole double-throw switch, and the output end of the double-pole double-throw switch is respectively connected with the first antenna and the second antenna;
the switching the first antenna to a main set antenna comprises:
controlling the earphone external detection module to output an earphone detection level signal to the first logic gate circuit;
controlling a first output end of the baseband processing module to input a global system for mobile communications (GSM) call level signal to the first logic gate circuit through a first general purpose input/output (GPIO) 1;
when the earphone insertion is detected, outputting a first level signal to the first logic gate circuit, and controlling the double-pole double-throw switch to switch the first antenna into a signal of a main set antenna, wherein the first level signal is a high level signal or a low level signal.
Another aspect of the present invention further provides an antenna switching terminal, including: an antenna switching circuit as claimed in any preceding claim.
Another aspect of the present invention provides another antenna switching terminal, including: the antenna switching method comprises a memory, a processor and a program which is stored on the memory and can run on the processor, wherein the antenna switching program realizes the steps of any one of the antenna switching methods when being executed by the processor.
In another aspect, the present invention further provides a computer-readable storage medium storing one or more programs, which are executable by one or more processors to implement the steps of any of the above-mentioned antenna switching methods.
According to the antenna switching circuit, the antenna switching method, the antenna switching terminal and the computer readable storage medium, whether the earphone is inserted or not is detected, and the circuit design is combined, so that the main antenna is switched to the antenna far away from the earphone when the earphone is inserted, the technical problem of TDD _ NOISE generated in an earphone mode because the antenna near the earphone is switched to the main antenna is solved, and the communication experience of a user is improved.
Drawings
Fig. 1 is a schematic diagram of a hardware structure of a mobile terminal implementing various embodiments of the present invention;
FIG. 2 is a diagram of a wireless communication system for the mobile terminal shown in FIG. 1;
fig. 3 is a schematic diagram of an antenna switching circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another antenna switching circuit according to an embodiment of the present invention;
fig. 5 is a schematic diagram of another antenna switching circuit according to an embodiment of the present invention;
fig. 6a to 6b are circuit diagrams of antenna switching between the NO type earphone and the NC type earphone according to the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a terminal for signal automatic adjustment according to an embodiment of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
The terminal may be implemented in various forms. For example, the terminal described in the present invention may include mobile terminals such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation terminal, a wearable device, an automotive wristband, a pedometer, and the like, and fixed terminals such as a Digital TV, a desktop computer, and the like.
The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.
Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The following describes each component of the mobile terminal in detail with reference to fig. 1:
the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).
WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.
The a/V input unit 104 is used to receive audio or video signals. The a/V input unit 104 may include a Graphics Processor (GPU) 1041 and a microphone 1042, the Graphics processor 1041 processing image data of still pictures or videos obtained by an image capturing terminal (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.
The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the mobile terminal 100 is moved 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.
The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus pen, or any other suitable object or accessory), and drive a corresponding connection terminal according to a preset program. The touch panel 1071 may include two parts of a touch detection terminal and a touch controller. The touch detection terminal detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing terminal, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.
Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.
The interface unit 108 serves as an interface through which at least one external terminal is connected to the mobile terminal 100. For example, the external terminal may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a terminal having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external terminal and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and the external terminal.
The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 110 is a control center of the mobile terminal, 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 operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.
Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.
In order to facilitate understanding of the embodiments of the present invention, a communication network system on which the mobile terminal of the present invention is based is described below.
Referring to fig. 2, fig. 2 is an architecture diagram of a communication Network system according to an embodiment of the present invention, where the communication Network system is an LTE system of a universal mobile telecommunications technology, and the LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an IP service 204 of an operator, which are in communication connection in sequence.
Specifically, the UE201 may be the terminal 100 described above, and is not described herein again.
The E-UTRAN202 includes eNodeB2021 and other eNodeBs 2022, among others. Among them, the eNodeB2021 may be connected with other eNodeB2022 through backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide the UE201 access to the EPC 203.
The EPC203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving gateway) 2034, a PGW (PDN gateway) 2035, and a PCRF (Policy and Charging Rules Function) 2036, and the like. The MME2031 is a control node that handles signaling between the UE201 and the EPC203, and provides bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location register (not shown) and holds subscriber specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034, PGW2035 may provide IP address assignment for UE201 and other functions, and PCRF2036 is a policy and charging control policy decision point for traffic data flow and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).
The IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem), or other IP services, among others.
Although the LTE system is described as an example, it should be understood by those skilled in the art that the present invention is not limited to the LTE system, but may also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems.
Based on the above mobile terminal hardware structure and communication network system, the present invention provides various embodiments of the method.
Fig. 3 is an antenna switching circuit according to a first embodiment of the present invention, and as shown in fig. 3, the antenna switching circuit includes: the earphone comprises an earphone external detection module 11, a switch switching control module 12, a first antenna 13 and a second antenna 14; the input end of the switch switching control module 12 is connected to the output end of the earphone external detection module 11, and the output end of the switch switching control module 12 is connected to the first antenna 13 and the second antenna 14 respectively;
the earphone external detection module 11 is configured to switch an earphone detection level signal when detecting that an earphone is inserted, and output the earphone detection level signal to the switch switching control module;
the switch switching control module 12 is configured to control to switch the first antenna 13 to a main antenna set when the earphone detects a level signal switch;
wherein the distance from the first antenna 11 to the earphone is larger than the distance from the second antenna 12 to the earphone.
According to the antenna switching circuit provided by the invention, the earphone external detection module 11 is used for detecting whether the earphone is inserted, and the switch switching control module 12 is used for switching the main antenna to the antenna far away from the earphone when the earphone is inserted, so that the technical problem of TDD _ NOISE generated in an earphone mode because the antenna near the earphone is switched to the main antenna is solved, and the communication experience of a user is improved.
The present invention also provides another antenna switching circuit, as shown in fig. 4, the antenna switching circuit includes: the earphone comprises an earphone external detection module 11, a switch switching control module 12, a first antenna 13 and a second antenna 14.
Wherein: the switching control module 12 includes: a first logic gate circuit 21, a baseband processing module 23 and a double-pole double-throw switch 24, wherein an input end of the first logic gate circuit 21 is connected to output ends of the earphone external detection module 11 and the baseband processing module 23, respectively, an output end of the first logic gate circuit 21 is connected to an input end of the double-pole double-throw switch 24, and an output end of the double-pole double-throw switch 24 is connected to the first antenna 13 and the second antenna 14, respectively;
in this embodiment, the external earphone detection module 11 outputs an earphone detection level signal to the first logic gate circuit 21;
the baseband processing module 23 inputs a global system for mobile communications (GSM) call level signal to the first logic gate circuit 21 through a first general purpose input/output (GPIO) 1;
when the external earphone detection module 11 detects that an earphone is inserted, it outputs a first level signal to the first logic gate circuit 21, and controls the double-pole double-throw switch 24 to switch the first antenna 13 to be a main antenna, where the first level signal is a high level signal or a low level signal.
The present invention also provides another antenna switching circuit, as shown in fig. 5, the antenna switching circuit includes: the earphone comprises an earphone external detection module 11, a switch switching control module 12, a first antenna 13 and a second antenna 14.
Wherein: the switching control module 12 includes: a first logic gate circuit 21, a second logic gate circuit 22, a baseband processing module 23, and a double-pole double-throw switch 24, wherein an input end of the first logic gate circuit 21 is connected to a first output end of the earphone external detection module 11 and the baseband processing module 23, an output end of the first logic gate circuit 21 is connected to an input end of the second logic gate circuit 22, a second output end of the baseband processing module 23 is connected to an input end of the second logic gate circuit 22, an output end of the second logic gate circuit 22 is connected to an input end of the double-pole double-throw switch 24, and an output end of the double-pole double-throw switch 24 is connected to the first antenna 13 and the second antenna 14;
in this embodiment, the external earphone detection module 11 outputs an earphone detection level signal to the first logic gate circuit 21;
a first output end of the baseband processing module 23 inputs a global system for mobile communications (GSM) call level signal to the first logic gate circuit 21 through a general purpose input/output (GPIO) 1; the second output terminal of the baseband processing module 23 inputs the double pole double throw switch control signal of the existing smart double antenna scheme to the second logic gate circuit 22 through the GPIO 2.
In the specific circuit design process, when the earphone external detection module 11 detects that an earphone is inserted, it outputs a first level signal to the first logic gate circuit 21, and controls the double-pole double-throw switch 24 to switch the first antenna 13 into a signal of a main set antenna, which is the first level signal. That is, in a specific circuit design, when the insertion of an earphone is detected, the earphone detection level signal output by the earphone external detection module 11 is the same as the signal for controlling the double-pole double-throw switch 24 to switch the first antenna 13 to the main set antenna, and both are first level signals, where the first level signal is a high level signal, or the first level signal is a low level signal, and may be specifically determined according to an actual earphone type and circuit.
In the specific circuit design process, when the earphone external detection module 11 detects that an earphone is inserted, the output signal of the second logic gate circuit 22 is controlled by the output signal of the first logic gate circuit 21; in this way, the switching of the first antenna 13 by the double-pole double-throw switch 24 is controlled by the earphone detection level signal when the earphone is inserted. When the earphone external detection module does not detect the insertion of an earphone, the output signal of the second logic gate circuit is controlled by the output signal of the second output terminal GPIO2 of the baseband processing module 23. Since the second output terminal of the baseband processing module 23 inputs the double-pole double-throw switch control signal of the existing smart double-antenna scheme to the second logic gate circuit 22 through the GPIO 2. In this way, when the earphone is not inserted, the first antenna 13 or the second antenna 14 is switched by the double-pole double-throw control signal of the existing intelligent double-antenna scheme.
In one embodiment, the earphone to be tested is a NO type earphone; the first logic gate circuit 21 is an or gate circuit, and the second logic gate circuit 22 is an and gate circuit. When the earphone is plugged in, the earphone detection level signal HEAD _ DET is a low level signal, and in this embodiment, the signal for switching the first antenna 13 to the main set antenna is controlled by the double-pole double-throw switch 24 to be a low level signal.
As shown in fig. 6a, the switch switching circuit includes: the power supply VDD, the earphone external detection module 11 and the switch SW1 are connected with one input end of an OR gate circuit, a first output end of the baseband processing module 23 is connected with the other input end of the OR gate circuit through a GPIO1, an output end of the OR gate circuit is connected with one input end of an AND gate circuit, a second output end of the baseband processing module 23 is connected with the other input end of the AND gate circuit through a GPIO2, an output end of the AND gate circuit is connected with a DPDT input end of a double-pole double-throw switch, a DPDT output end is connected with the first antenna 13 and the second antenna 14, and the distance from the first antenna 13 to the earphone is larger than the.
In the working process, the earphone external detection module 11 sends the earphone detection level signal HEAD _ DET to the or gate circuit through the switch SW1, the first output end of the baseband processing module 23 sends the GSM call state signal to the or gate circuit through the GPIO1, and the HEAD _ DET and the GSM call state signal realize the sign output of the call state after the earphone is inserted through the or gate circuit. Specifically, when the earphone is not inserted, the HEAD _ DET is a high level signal, and after the earphone is inserted, the earphone external detection module 11 contacts the HEAD _ DET with a low level signal, so as to switch the state of the HEAD _ DET from the high level signal to the low level signal. When the GSM does not realize the call, the GPIO1 outputs a high level signal, and when the GSM call is established, the GPIO1 outputs a low level signal.
When the HEAD _ DET and the GPIO1 are both low level signals, and the output OR _ gate _ Ctrl of the OR gate circuit is also a low level signal, the output of the OR gate circuit directly controls the and gate circuit to output a low level signal, so that the DPDT switch switches the main antenna to a position away from the headset, that is, the first antenna is switched to the main antenna.
In this embodiment, the second output terminal of the baseband processing module 23 inputs the double-pole double-throw switch control signal of the existing smart double-antenna scheme to the and circuit through the GPIO 2. The second output terminal of the baseband processing module 23 implements normal DPDT switch switching control through GPIO2, when the headset is not plugged OR the GSM call is not established, the output OR _ gate _ Ctrl of the OR gate circuit is in the 1 state, the control of the and gate circuit depends on the second output terminal GPIO2 of the baseband processing module 23, and the control of the DPDT switch is determined by the existing intelligent dual-antenna scheme. I.e. when the headset is not inserted, the switching of the first antenna 13 and the second antenna 14 is determined by the smart dual antenna scheme.
In another specific embodiment, the earphone to be detected whether to be inserted is an NC type earphone; the first logic gate circuit 21 is an and circuit, and the second logic gate circuit 22 is an or circuit. When the earphone is plugged in, the earphone detection level signal HEAD _ DET is a high level signal, and in this embodiment, the double pole double throw switch 24 is controlled to switch the first antenna 13 to the signal of the main set antenna, which is a high level signal.
As shown in fig. 6b, the switch switching circuit includes: the power supply VDD, the earphone external detection module 11 and the switch SW1 are connected with one input end of the AND circuit, the first output end of the baseband processing module 23 is connected with the other input end of the AND circuit through GPIO1, the output end of the AND circuit is connected with one input end of an OR gate circuit, the second output end of the baseband processing module 23 is connected with the other input end of the OR gate circuit through GPIO2, the output end of the OR gate circuit is connected with the DPDT input end of a double-pole double-throw switch, the DPDT output end is connected with the first antenna 13 and the second antenna 14, wherein the distance from the first antenna 13 to the earphone is larger than the distance from the second antenna.
In the working process, the earphone external detection module 11 sends the earphone detection level signal HEAD _ DET to the and gate circuit through the switch SW1, the first output end of the baseband processing module 23 sends the GSM call state signal to the and gate circuit through the GPIO1, and the HEAD _ DET and the GSM call state signal realize the flag output of the call state after the earphone is inserted through the and gate circuit. Specifically, when the earphone is not inserted, the HEAD _ DET is a low level signal, and after the earphone is inserted, the earphone external detection module 11 contacts the HEAD _ DET with a high level signal, so as to switch the state of the HEAD _ DET from the low level signal to the high level signal. When the GSM does not realize the call, the GPIO1 outputs a low level signal, and when the GSM call is established, the GPIO1 outputs a high level signal.
When the HEAD _ DET and the GPIO1 are both high level signals, the output OR _ gate _ Ctrl of the and gate circuit is also a high level signal, and the output of the and gate circuit directly controls the OR gate circuit to output a high level signal, so that the DPDT switch switches the main antenna to a position away from the headset, that is, the first antenna is switched to the main antenna.
In this embodiment, the second output terminal of the baseband processing module 23 inputs the double-pole double-throw switch control signal of the existing smart double-antenna scheme to the or gate circuit through the GPIO 2. The second output terminal of the baseband processing module 23 implements normal DPDT switch switching control through GPIO2, when the headset is not plugged or the GSM call is not established, the output AND _ gate _ Ctrl of the AND circuit is in the 0 state, the control of the or gate circuit depends on the second output terminal GPIO2 of the baseband processing module 23, AND the control of the DPDT switch is determined by the existing intelligent dual-antenna scheme. I.e. when the headset is not inserted, the switching of the first antenna 13 and the second antenna 14 is determined by the smart dual antenna scheme.
According to the antenna switching circuit provided by the invention, the first logic gate circuit and the second logic gate circuit are designed, NO type and NC type earphone seats are covered and supported, and the detection of earphone insertion state and GSM conversation state events is realized; for the NO type earphone seat, hardware judgment of the earphone conversation state is realized through the input of the states of GPIO1 of an OR gate circuit and a baseband processing module, and an AND gate is driven to control the switching of a DPDT radio frequency path; for the NO type earphone seat, the hardware judgment of the earphone conversation state is realized through the input of the states of GPIO1 of the AND gate circuit and the baseband processing module, and the OR gate circuit is driven to control the switching of the DPDT radio frequency path. And then realize the earphone when the antenna work, keep away from the main antenna of collecting, avoid the earphone to receive the influence of main antenna radiation of collecting.
The invention also provides a terminal comprising an antenna switching circuit as in any one of fig. 3, 4, 5, 6a, 6 b.
The present invention also provides an antenna switching method, which is applied to the antenna switching circuit shown in fig. 3, and the antenna switching method includes:
s101, switching earphone detection level signals when detecting that an earphone is inserted;
s102, when the earphone detection level signal is switched, controlling to switch the first antenna into a main antenna;
wherein the distance of the first antenna from the earphone is greater than the distance of the second antenna from the earphone.
The present invention also provides another antenna switching method, which is applied to the antenna switching circuit shown in fig. 4, and the antenna switching method includes:
s201, switching earphone detection level signals when detecting that an earphone is inserted;
s202, when the earphone detection level signal is switched, controlling to switch the first antenna into a main antenna;
wherein switching the first antenna to a main set antenna comprises:
controlling the earphone external detection module to output an earphone detection level signal to the first logic gate circuit;
controlling the baseband processing module to input a global system for mobile communications (GSM) call level signal to the first logic gate circuit through a first general purpose input/output (GPIO) 1;
when the earphone insertion is detected, outputting a first level signal to the first logic gate circuit, and controlling the double-pole double-throw switch to switch the first antenna into a signal of a main set antenna, wherein the first level signal is a high level signal or a low level signal.
Based on the above embodiments of the methods, the present invention further provides an antenna switching terminal 7, which may specifically be a mobile terminal including a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palm computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation terminal, a wearable device, an automatic bracelet, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like.
As shown in fig. 7, the antenna-switched terminal 7 includes: a memory 71, a processor 72 and a program for antenna switching stored on said memory and executable on said processor, said program for antenna switching when executed by said processor implementing the steps of:
when detecting that the earphone is inserted, switching an earphone detection level signal;
when the earphone detects the level signal switching, controlling to switch the first antenna to a main antenna;
wherein the distance from the first antenna to the earphone is greater than the distance from the second antenna to the earphone.
In one embodiment, in the step of switching the first antenna to the main set antenna, the processor is further configured to execute the antenna switching program to implement the following steps:
controlling the earphone external detection module to output an earphone detection level signal to the first logic gate circuit;
controlling the baseband processing module to input a global system for mobile communications (GSM) call level signal to the first logic gate circuit through a first general purpose input/output (GPIO) 1;
when the earphone insertion is detected, outputting a first level signal to the first logic gate circuit, and controlling the double-pole double-throw switch to switch the first antenna into a signal of a main set antenna, wherein the first level signal is a high level signal or a low level signal.
Yet another aspect of the present invention provides a computer readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to perform the steps of:
when detecting that the earphone is inserted, switching an earphone detection level signal;
when the earphone detects the level signal switching, controlling to switch the first antenna to a main antenna;
wherein the distance from the first antenna to the earphone is greater than the distance from the second antenna to the earphone.
In one embodiment, in the step of switching the first antenna to the main set antenna, the one or more programs are executable by the one or more processors to implement the steps of:
controlling the earphone external detection module to output an earphone detection level signal to the first logic gate circuit;
controlling the baseband processing module to input a global system for mobile communications (GSM) call level signal to the first logic gate circuit through a first general purpose input/output (GPIO) 1;
when the earphone insertion is detected, outputting a first level signal to the first logic gate circuit, and controlling the double-pole double-throw switch to switch the first antenna into a signal of a main set antenna, wherein the first level signal is a high level signal or a low level signal.
According to the antenna switching circuit, the antenna switching method, the antenna switching terminal and the computer readable storage medium, whether the earphone is inserted or not is detected, and the circuit design is combined, so that the main antenna is switched to the antenna far away from the earphone when the earphone is inserted, the technical problem of TDD _ NOISE generated in an earphone mode because the antenna near the earphone is switched to the main antenna is solved, and the communication experience of a user is improved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. An antenna switching circuit, comprising: the earphone comprises an earphone external detection module, a switch switching control module, a first antenna and a second antenna; the switch switching control module includes: the input end of the first logic gate circuit is respectively connected with the output end of the earphone external detection module and the first output end of the baseband processing module, the output end of the first logic gate circuit is connected with the input end of the double-pole double-throw switch, and the output end of the double-pole double-throw switch is respectively connected with the first antenna and the second antenna;
the earphone external detection module is used for switching an earphone detection level signal when detecting that an earphone is inserted, and outputting the earphone detection level signal to the first logic gate circuit;
a first output end of the baseband processing module inputs a global system for mobile communications (GSM) call level signal to the first logic gate circuit through a first general purpose input/output (GPIO) 1;
when the earphone external detection module detects that an earphone is inserted, a first level signal is output to the first logic gate circuit, and the double-pole double-throw switch is controlled to switch the first antenna into a signal of a main set antenna, wherein the first level signal is a high level signal or a low level signal;
the switch switching control module is used for controlling the switching of the first antenna into a main antenna when the earphone detects the level signal switching, and the switch switching control module further comprises a second logic gate circuit; the input end of the second logic gate circuit is respectively connected with the output end of the first logic gate circuit and the second output end of the baseband processing module, and the output end of the second logic gate circuit is connected with the input end of the double-pole double-throw switch;
a second output end of the baseband processing module inputs a double-pole double-throw switch control signal to the second logic gate circuit through a second general purpose input/output GPIO 2;
when the earphone external detection module detects that an earphone is inserted, the output signal of the second logic gate circuit is controlled by the output signal of the first logic gate circuit; when the earphone external detection module does not detect the insertion of an earphone, the output signal of the second logic gate circuit is controlled by the output signal of the GPIO 2;
wherein the distance of the first antenna from the earphone is greater than the distance of the second antenna from the earphone.
2. The antenna switching circuit according to claim 1, wherein the earphone is a NO type earphone;
the earphone external detection module outputs an earphone detection level signal as a low level signal when the insertion of the earphone is detected, and outputs the earphone detection level signal as a high level signal when the insertion of the earphone is not detected;
the baseband processing module controls the GPIO1 to output a low level signal when the GSM is in a call state, and controls the GPIO1 to output a high level signal when the GSM is in a non-call state;
the first logic gate circuit is an OR gate circuit, and the second logic gate circuit is an AND gate circuit;
and controlling the double-pole double-throw switch to switch the first antenna into a signal of a main set antenna, wherein the signal is a low-level signal.
3. The antenna switching circuit according to claim 1, wherein the headset is an NC type headset;
the earphone external detection module outputs an earphone detection level signal as a high level signal when the insertion of the earphone is detected, and outputs the earphone detection level signal as a low level signal when the insertion of the earphone is not detected;
the baseband processing module controls the GPIO1 to output a high level signal when the GSM is in a call state, and controls the GPIO1 to output a low level signal when the GSM is in a non-call state;
the first logic gate circuit is an AND gate circuit, and the second logic gate circuit is an OR gate circuit;
and controlling the double-pole double-throw switch to switch the first antenna into a signal of a main set antenna, wherein the signal is a high-level signal.
4. An antenna switching method is applied to an antenna switching circuit, and the antenna switching circuit comprises the following steps: the earphone comprises an earphone external detection module, a switch switching control module, a first antenna and a second antenna; the switch switching control module includes: the input end of the first logic gate circuit is respectively connected with the output end of the earphone external detection module and the first output end of the baseband processing module, the output end of the first logic gate circuit is connected with the input end of the double-pole double-throw switch, and the output end of the double-pole double-throw switch is respectively connected with the first antenna and the second antenna; the switch switching control module also comprises a second logic gate circuit; the input end of the second logic gate circuit is respectively connected with the output end of the first logic gate circuit and the second output end of the baseband processing module, and the output end of the second logic gate circuit is connected with the input end of the double-pole double-throw switch;
a second output end of the baseband processing module inputs a double-pole double-throw switch control signal to the second logic gate circuit through a second general purpose input/output GPIO 2;
when the earphone external detection module detects that an earphone is inserted, the output signal of the second logic gate circuit is controlled by the output signal of the first logic gate circuit; when the earphone insertion is not detected by the earphone external detection module, the output signal of the second logic gate circuit is controlled by the output signal of the GPIO2, and the method comprises the following steps:
when detecting that the earphone is inserted, switching an earphone detection level signal;
when the earphone detects the level signal switching, control to switch the first antenna to the main antenna, including: controlling the earphone external detection module to output an earphone detection level signal to the first logic gate circuit;
controlling a first output end of the baseband processing module to input a global system for mobile communications (GSM) call level signal to the first logic gate circuit through a first general purpose input/output (GPIO) 1;
when the insertion of an earphone is detected, outputting a first level signal to the first logic gate circuit, and controlling the double-pole double-throw switch to switch the first antenna into a signal of a main set antenna, wherein the first level signal is a high level signal or a low level signal;
wherein the distance of the first antenna from the earphone is greater than the distance of the second antenna from the earphone.
5. An antenna switching terminal, comprising: an antenna switching circuit as claimed in any one of claims 1 to 3.
6. An antenna switching terminal, comprising: a memory, a processor and a program stored on the memory and executable on the processor for implementing antenna switching, the program for implementing antenna switching when executed by the processor implementing the steps of the antenna switching method as claimed in claim 4.
7. A computer-readable storage medium, having one or more programs stored thereon which are executable by one or more processors to perform the steps of the antenna switching method as claimed in claim 4.
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| CN112134992B (en) * | 2019-06-25 | 2021-08-24 | 北京小米移动软件有限公司 | Terminal device and control method thereof |
| CN111651387B (en) * | 2020-05-25 | 2022-02-15 | 维沃移动通信有限公司 | Interface circuit and electronic equipment |
| CN115934604B (en) * | 2023-03-10 | 2023-05-23 | 苏州浪潮智能科技有限公司 | USB circuit, USB controller switching method and device |
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