Interference detection circuit and terminal equipment

Abstract

The embodiment of the utility model discloses an interference detection circuit and terminal equipment, the interference detection circuit is used for target equipment, and the target equipment comprises an antenna module; the interference detection circuit comprises a switching module and a test seat. The switching module is used for switching a transmission circuit of the signal received by the antenna module and transmitting the signal to the test seat; the test seat is used for being externally connected with an interference signal detector. Therefore, according to the scheme, interference detection can be realized through the interference detection circuit on the basis that the original structure of the target equipment is not damaged.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of circuit, in particular to an interference detection circuit and a terminal device. BACKGROUND

[0002] With the development of communication products and the increasing functions of the communication products, the peripherals of the communication products are also increasing. People's pursuit of the signal quality of the communication products is also increasing. However, the peripherals can cause interference to the signals received by the communication products. In order to determine which peripheral causes the interference signal, the related technology needs to lead a line to a spectrum analyzer by means of destructive soldering or flying wire in the circuit of the communication product, which is troublesome and is not conducive to testing again after rectification to determine whether the interference problem is solved. CONTENT OF THE UTILITY MODEL

[0003] Embodiments of the present application provide an interference detection circuit and a terminal device, which can realize interference detection through the interference detection circuit without destroying the original structure of the target device.

[0004] In a first aspect, embodiments of the present application provide an interference detection circuit for a target device, wherein the target device comprises an antenna module;

[0005] The interference detection circuit comprises a switching module and a test seat.

[0006] The switching module is configured to switch the transmission circuit of the signal received by the antenna module and transmit the signal to the test seat.

[0007] The test seat is configured to be externally connected to an interference signal detector.

[0008] In one of the embodiments, the target device further comprises a signal processing module.

[0009] The fixed terminal of the switching module is connected to the antenna module, and the two movable terminals of the switching module are respectively connected to the test seat and the signal processing module.

[0010] In one of the embodiments, when the enable signal of the switching module is a high-level signal, the fixed terminal of the switching module is connected to one of the two movable terminals; and when the enable signal of the switching module is a low-level signal, the fixed terminal of the switching module is connected to the other of the two movable terminals.

[0011] In one of the embodiments, the switching module is a single-pole double-throw switch.

[0012] In one of the embodiments, the target device further comprises an interference signal source.

[0013] The antenna module is configured to receive the interference signal from the interference signal source.

[0014] The interference signal detector is configured to detect the interference signal.

[0015] In one of the embodiments, the interference signal detector is a spectrum analyzer.

[0016] The spectrum analyzer is configured to display the spectrum of the interference signal, and the spectrum of the interference signal is used to locate the interference signal source.

[0017] In one of the embodiments, the target device is a mobile phone, and the interference signal source is an external device of the mobile phone.

[0018] In one of the embodiments, the external device of the mobile phone includes a screen, a camera, and / or a loudspeaker.

[0019] In a second aspect, the embodiments of the present application provide a terminal device, which includes an antenna module and the interference detection circuit of the first aspect.

[0020] In one of the embodiments, the terminal device further includes a signal processing module.

[0021] The fixed terminal of the switching module of the interference detection circuit is connected to the antenna module, and the two movable terminals of the switching module are respectively connected to the signal processing module and the test seat of the interference detection circuit.

[0022] In one of the embodiments, when the enable signal of the switching module is a high-level signal, the fixed terminal of the switching module is connected to one of the two movable terminals; and when the enable signal of the switching module is a low-level signal, the fixed terminal of the switching module is connected to the other of the two movable terminals.

[0023] In one of the embodiments, the switching module is a single-pole double-throw switch.

[0024] In one of the embodiments, the terminal device further includes an interference signal source.

[0025] The antenna module is configured to receive the interference signal from the interference signal source.

[0026] The interference signal detector is configured to detect the interference signal.

[0027] In one of the embodiments, the interference signal detector is a spectrum analyzer.

[0028] The spectrum analyzer is configured to display the spectrum of the interference signal, and the spectrum of the interference signal is used to locate the interference signal source.

[0029] In one of the embodiments, the terminal device is a mobile phone, and the interference signal source is an external device of the mobile phone.

[0030] In one of the embodiments, the external device of the mobile phone includes a screen, a camera and / or a loudspeaker.

[0031] In summary, in the embodiments of the present application, the interference detection circuit is used for a target device, and the interference detection circuit includes a switching module and a test seat. The switching module can directly switch the transmission circuit of the signal received by the antenna module, so as to transmit the signal received by the antenna module to the test seat. The test seat is externally connected with an interference signal detector. In this way, only a switching module needs to be added to the original circuit of the target device without damaging the original circuit structure. The signal received by the antenna is transmitted to the externally connected interference signal detector through the test seat via the switching module. The interference signal is detected by using the interference signal detector, so as to quickly locate the interference signal source based on the detection result. The interference signal can be detected again after the interference signal source is rectified, so as to determine whether the interference problem is solved. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the present application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0033] Figure 1 is a circuit schematic diagram of a device in the related art;

[0034] Figure 2 is a structural schematic diagram of an interference detection circuit provided by an embodiment of the present application;

[0035] Figure 3 is a schematic diagram of an interference detection circuit provided by an embodiment of the present application;

[0036] Figure 4 is a circuit schematic diagram of a terminal device provided by an embodiment of the present application.

[0037] In the figure: 1, antenna module; 2, signal processing module; 3, interference signal source; 4, interference detection circuit; 5, switching module; 6, test seat; 7, interference signal detector; 8, target device; 21, signal transceiver; 22, signal amplifier; 23, duplexer; 24, selection module. DETAILED DESCRIPTION

[0038] The technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0039] Figure 1 is a circuit schematic diagram of a device in the related art. The device comprises an antenna module 1 and a signal processing module 2. The signal processing module 2 can comprise but is not limited to a signal transceiver 21, a signal amplifier 22, a duplexer 23, and / or a selection module 24, etc.

[0040] The antenna module 1 receives signals through antenna coupling and transmits the signals to the signal processing module 2. When there is an interference signal source 3 and the interference signal source 3 generates an interference signal, the interference signal will also be received by the antenna module 1 and transmitted to the signal processing module 2, thereby causing interference. The interference signal source 3 can be a module included in the device or a module independent of the device.

[0041] Figure 2 is a structural schematic diagram of an interference detection circuit provided by an embodiment of the present application. The interference detection circuit 4 comprises a switching module 5 and a test seat 6. The test seat 6 can be used to externally connect an interference signal detector 7. The test seat 6 enables the interference signal detector 7 to be conveniently electrically connected with a target device 8, thereby detecting the interference signal received by the target device. The test seat 6 is reusable, allowing quick replacement of the interference signal detector 7, and compared with a one-time test method such as directly welding the interference signal detector 7 into the interference detection circuit 4, externally connecting the interference signal detector 7 through the test seat 6 can reduce test cost.

[0042] The switching module 5 has one fixed terminal and two movable terminals. The switching module 5 switches the transmission circuit of the signal received by the antenna module 1 by connecting the fixed terminal with one of the movable terminals at the same time, thereby switching the circuit to the circuit where the connected movable terminal is located. The switching module 5 is used to switch the transmission circuit of the signal received by the antenna module 1, and determine whether to transmit the signal received by the antenna module 1 to the signal processing module 2 or the test seat 6.

[0043] The interference detection circuit 4 can be used in the target device 8, and the target device 8 can be Figure 1 the device shown in FIG. 1.

[0044] In an embodiment, as shown in Figure 3 the switching module 5 has one fixed terminal and two movable terminals, and the fixed terminal can only be connected with one of the movable terminals at the same time. One fixed terminal of the switching module 5 is connected with the antenna module 1 of the target device 8, and the other fixed terminal of the switching module 5 is connected with the test seat 6.

[0045] In one embodiment, when the enable signal of the switching module 5 is a high level signal, the fixed terminal of the switching module 5 is connected to one of the two movable terminals; when the enable signal of the switching module 5 is a low level signal, the fixed terminal of the switching module 5 is connected to the other of the two movable terminals.

[0046] For example, when the enable signal of the switching module 5 is a high level signal, the fixed terminal of the switching module 5 is connected to the signal processing module 2, so that the signal received by the antenna module 1 is transmitted to the signal processing module 2. When the enable signal of the switching module 5 is a low level signal, the fixed terminal of the switching module 5 is connected to the test seat 6, so that the signal received by the antenna module 1 is transmitted to the external interference signal detector 7 through the test seat 6.

[0047] In one embodiment, the switching module 5 is controlled by BPI (Bi-directional Peripheral Interface) logic. BPI is mainly used to connect microprocessors and peripherals, and is a synchronous serial communication interface standard with the advantages of simplicity, high speed and low cost. Therefore, the switching module 5 controlled by BPI logic supports full-duplex communication, and the antenna module 1, the signal processing module 2 and the test seat 6 connected to the switching module 5 can simultaneously send and receive data. Moreover, the switching module 5 can be easily expanded to support more peripherals and higher data transmission rates.

[0048] Because the switching module 5 supports full-duplex communication, when the target device 8 has data analysis capability, the interference signal detector 7 can also transmit the detection result back to the target device 8 through the test seat 6, and the target device 8 analyzes and processes the detection result.

[0049] In one embodiment, the switching module 5 can be a single-pole double-throw switch, a programmable logic controller (PLC) or a logic circuit controlled by an FPGA (field programmable gate array).

[0050] When it is necessary to detect interference signals, the interference signal detector 7 can be connected to the test seat 6, and the switching module 5 is controlled to connect the antenna module 1 to the test seat 6 and disconnect the connection between the antenna module 1 and the signal processing module 2, so that the interference signals received by the antenna module 1 are transmitted into the interference signal detector 7. The interference signal detector 7 is used to detect the interference signals received by the antenna module 1 to obtain a detection result, and the interference signal source 3 is located based on the detection result.

[0051] In one embodiment, the target device 8 does not include the interference signal source 3, but the signal received by the antenna module 1 of the target device can be interfered by other wireless devices (such as microwave ovens, Bluetooth devices, or cables, etc.). The interference signal received by the antenna module 1 can be transmitted to the interference signal detector 7 through the switching module 5, so as to realize the detection of the interference signal.

[0052] In another embodiment, the target device 8 includes at least one interference signal source 3, and the signal received by the antenna module 1 can include the interference signal emitted by the interference signal source 3. The interference signal emitted by the interference signal source 3 received by the antenna module 1 can be transmitted to the interference signal detector 7 through the switching module 5, so as to realize the detection of the interference signal.

[0053] In one embodiment, the interference signal detector 7 can be a signal detector. The signal detector can detect the wireless signal in a specific frequency range, and help to locate the interference signal source.

[0054] In one embodiment, the interference signal detector 7 can be a spectrum analyzer. The spectrum analyzer can display the spectrum and signal strength of the received interference signal. The spectrum of the interference signal can be used to locate the interference signal source 3. Through the spectrum and signal strength of the interference signal, it can be checked whether the interference signal source 3 is from the LCD (Liquid Crystal Display), the clock signal, the MIPI (Mobile Industry Processor Interface) line or the working power supply.

[0055] In one embodiment, the target device 8 can be a mobile phone, and the interference signal source 3 can be a peripheral of the mobile phone. The peripheral of the mobile phone can include but is not limited to the screen of the mobile phone, the camera of the mobile phone and / or the loudspeaker of the mobile phone, etc.

[0056] By adopting the technical scheme of the embodiment of the present application, the interference detection circuit is used for the target device, and the interference detection circuit includes a switching module and a test seat. The signal received by the antenna module can be transmitted to the test seat through the transmission circuit of the switching module. The test seat is externally connected to the interference signal detector. In this way, only a switching module needs to be added to the original circuit of the target device, without damaging the original circuit structure. The signal received by the antenna is transmitted to the externally connected interference signal detector through the test seat and the switching module. The interference signal is detected by the interference signal detector. The interference signal source can be quickly located based on the detection result. After the interference signal source is rectified, the interference signal can be detected again to determine whether the interference problem is solved.

[0057] Figure 4An embodiment of the present application provides a circuit schematic diagram of a terminal device. The terminal device comprises an antenna module 1 and the interference detection circuit 4 described above. Through the switching module 5 in the interference detection circuit 4, the signal received by the antenna module 1 can be transmitted to the test seat 6 in the interference detection circuit 4, so that the signal received by the antenna module 1 is detected by the interference signal detector 7 connected to the test seat 6.

[0058] In one of the embodiments, the terminal device can further comprise a signal processing module 2. The fixed terminal of the switching module 5 of the interference detection circuit 4 is connected to the antenna module 1, and the two movable terminals of the switching module 5 are respectively connected to the signal processing module 2 and the test seat 6 of the interference detection circuit 4.

[0059] In one of the embodiments, when the enable signal of the switching module 5 is a high-level signal, the fixed terminal of the switching module 5 is connected to one of the two movable terminals; and when the enable signal of the switching module 5 is a low-level signal, the fixed terminal of the switching module 5 is connected to the other of the two movable terminals.

[0060] In one of the embodiments, the switching module 5 is a single-pole double-throw switch.

[0061] In one of the embodiments, the terminal device further comprises an interference signal source 3.

[0062] The antenna module 1 is configured to receive the interference signal emitted by the interference signal source 3.

[0063] The interference signal detector 7 is configured to detect the interference signal.

[0064] In one of the embodiments, the interference signal detector 7 is a spectrum analyzer.

[0065] The spectrum analyzer is configured to display the spectrum of the interference signal, and the spectrum of the interference signal is used to locate the interference signal source 3.

[0066] In one of the embodiments, the terminal device is a mobile phone, and the interference signal source is an external device of the mobile phone.

[0067] In one of the embodiments, the external device of the mobile phone comprises a screen, a camera and / or a loudspeaker.

[0068] The terminal device can be the target device 8 described above, and the specific limitation of the terminal device can refer to the specific limitation of the target device 8 described above, which will not be repeated here.

[0069] The terminal device in the embodiment of the application comprises an interference detection circuit, the interference detection circuit comprises a switching module and a test seat, the signal received by the antenna module can be transmitted to the test seat through the switching module, and the test seat is externally connected with an interference signal detector. In this way, a switching module is added to the original circuit of the terminal device without damaging the original circuit structure of the terminal device, so that the signal received by the antenna is transmitted to the externally connected interference signal detector through the test seat and the interference signal is detected by the interference signal detector, the interference signal source is quickly located based on the detection result, and the interference signal is detected again after the interference signal source is rectified, so that whether the interference problem is solved is judged.

[0070] It should be noted that the utility model is not limited to the above-mentioned embodiments, and other changes can be made according to the conception principle of the utility model, and the changes made according to the creative spirit of the utility model should be included in the range of protection claimed by the utility model.

Claims

1. An interference detection circuit, characterized by, The target device comprises an antenna module; The interference detection circuit comprises a switching module and a test seat; The switching module is configured to switch the transmission circuit of the signal received by the antenna module and transmit the signal to the test seat. The test seat is configured to be externally connected to an interference signal detector.

2. The interference detection circuit of claim 1, wherein, The target device further comprises a signal processing module; The stationary end of the switching module is connected to the antenna module, and the two movable ends of the switching module are respectively connected to the test seat and the signal processing module.

3. The interference detection circuit of claim 2, wherein, When the enable signal of the switching module is a high-level signal, the stationary end of the switching module is connected to one of the two movable ends; when the enable signal of the switching module is a low-level signal, the stationary end of the switching module is connected to the other of the two movable ends.

4. The interference detection circuit according to any one of claims 1 to 3, characterized by The switching module is a single-pole double-throw switch.

5. The interference detection circuit of claim 1, wherein, The target device further comprises an interference signal source; The antenna module is configured to receive the interference signal emitted by the interference signal source. The interference signal detector is configured to detect the interference signal.

6. The interference detection circuit of claim 5, wherein, The interference signal detector is a frequency spectrometer. The frequency spectrometer is configured to display the frequency spectrum of the interference signal, and the frequency spectrum of the interference signal is used to locate the interference signal source.

7. The interference detection circuit of claim 6, wherein, The target device is a mobile phone, and the interference signal source is an external device of the mobile phone.

8. The interference detection circuit of claim 7, wherein, The external device of the mobile phone comprises a screen, a camera and / or a loudspeaker.

9. A terminal device, comprising: The terminal device comprises an antenna module and an interference detection circuit as claimed in claim 1.

10. The terminal device according to claim 9, characterized by The terminal device further comprises a signal processing module; The stationary end of the switching module of the interference detection circuit is connected to the antenna module, and the two movable ends of the switching module are respectively connected to the signal processing module and the test seat of the interference detection circuit.

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