Power detection circuit and intelligent terminal

Abstract

The utility model provides a power detection circuit and an intelligent terminal. The power detection circuit comprises at least one group of cascaded first coupling device and second coupling device; a detection signal output port of the second coupling device is connected with an idle port of the first coupling device, and a detection signal output port of the first coupling device is connected with a power detection port of the radio frequency transceiver; a first power detection signal detected by the first coupling device is sent to a power detection port of the radio frequency transceiver through a detection signal output port of the first coupling device; and / or, a second power detection signal detected by the second coupling device flows into the idle port of the first coupling device through the detection signal output port of the second coupling device, and then is sent to the power detection port of the radio frequency transceiver through the detection signal output port of the first coupling device. According to the power detection loop, the idle port of the first coupling device is utilized, switching output of the two paths of power detection signals is achieved, and then the hardware cost of the power detection loop is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of intelligent terminals, and in particular to a power detection circuit and an intelligent terminal. Background Art

[0002] In the radio frequency unit of the smart terminal, the transmission path of the radio frequency signal is usually equipped with a power detection circuit for detecting the power of the radio frequency signal in the corresponding transmission path.

[0003] In some implementations, such as Figures 1 to 3 As shown, the TX path is the transmission path, and the TX+PRX path is the transmission plus reception path. The power detection circuit needs to detect the 4-way RF transmission signal and return it to the two power detection ports (MRX0 / MRX1) of the RF transceiver, and requires: the power detection signal corresponding to the RF transmission signal from the TX0 port must be returned to the MRX0 port, and the power detection signal corresponding to the RF transmission signal from the TX1 port must be returned to the MRX1 port. Since the two power detection signals have to share a power detection port, the existing technology realizes signal switching by performing switch design in the power detection circuit. Among them, the switch design includes but is not limited to: Figure 1 The two single-pole double-throw switches (SPDT) shown in FIG. Figure 2 A double pole four throw switch (Double Pole Four Throw, DP4T) as shown in Figure 3 A double pole double throw switch (DPDT) and two SPDTs are shown.

[0004] In the process of conceiving and implementing this application, the inventors found that there are at least the following problems: the power detection circuit needs to use SPDT, DPDT, DP4T and other devices and device combinations to realize related functions. These switch devices are expensive and occupy more PCB ornament area. In the circuit design process, matching capacitors and power filter capacitors must be configured for them, and they also occupy the GPIO port or MIPI port of the baseband (Base Band, BB side).

[0005] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0006] In response to the above technical problems, the present application provides a power detection circuit and an intelligent terminal to reduce the hardware cost of the power detection circuit.

[0007] The present application provides a power detection circuit, comprising: at least one set of cascaded first coupling devices and second coupling devices; wherein the detection signal output port of the second coupling device is connected to the idle port of the first coupling device, and the detection signal output port of the first coupling device is connected to the power detection port of a radio frequency transceiver; the radio frequency transceiver is a device in a radio frequency unit where the power detection circuit is located;

[0008] The first power detection signal detected by the first coupling device is sent to the power detection port of the RF transceiver via the detection signal output port of the first coupling device; and / or the second power detection signal detected by the second coupling device flows into the idle port of the first coupling device via the detection signal output port of the second coupling device, and then is sent to the power detection port of the RF transceiver via the detection signal output port of the first coupling device.

[0009] Optionally, the first coupling device comprises a first coupler, and the first coupler comprises a first coupling port and a first TERM port.

[0010] Optionally, the first coupling port is a detection signal output port of the first coupling device.

[0011] Optionally, the first TERM port is an idle port of the first coupling device.

[0012] Optionally, the first coupling device further includes a first radio frequency signal input port and a first radio frequency signal output port.

[0013] Optionally, the first RF signal input port is connected to a first output port of a RF transmitting circuit.

[0014] Optionally, the first radio frequency signal output port is connected to a first external antenna.

[0015] Optionally, the radio frequency transmitting circuit is a device disposed inside the radio frequency unit and including the radio frequency transceiver.

[0016] Optionally, the second coupling device includes a second coupler, and the second coupler includes a second coupling port, a second TERM port, a second radio frequency signal input port and a second radio frequency signal output port.

[0017] Optionally, the second coupling port is a detection signal output port of the second coupling device.

[0018] Optionally, the second TERM port is grounded through a first resistor.

[0019] Optionally, the second RF signal input port is connected to a second output port of the RF transmitting circuit.

[0020] Optionally, the second radio frequency signal output port is connected to an external second antenna.

[0021] Optionally, the first coupling device is an internal component arranged inside an amplifier in the radio frequency unit, and the first coupling device includes a third coupler and a switch device.

[0022] Optionally, the third coupler includes a third coupling port and a third TERM port, and the switch device includes a first detection signal selection input port, a second detection signal selection input port and a detection signal selection output port.

[0023] Optionally, the third coupling port is connected to the first detection signal selection input port.

[0024] Optionally, the third TERM port is grounded through a second resistor.

[0025] Optionally, the second detection signal selection input port is an idle port of the first coupling device.

[0026] Optionally, the detection signal selection output port is a detection signal output port of the first coupling device.

[0027] Optionally, the amplifier further includes a first radio frequency signal input interface and a second radio frequency signal output interface.

[0028] Optionally, the first RF signal input interface is connected to a third output port of the RF transmitting circuit.

[0029] Optionally, the second radio frequency signal output interface is connected to an external third antenna.

[0030] Optionally, the second coupling device is an internal component arranged inside the transmitting module in the radio frequency unit, and the second coupling device includes a fourth coupler, and the fourth coupler includes a fourth coupling port.

[0031] Optionally, the fourth coupling port is a detection signal output port of the second coupling device.

[0032] Optionally, the transmitting module also includes a second RF signal input interface and a second RF signal output interface.

[0033] Optionally, the second RF signal input interface is connected to a fourth output port of the RF transmitting circuit.

[0034] Optionally, the second radio frequency signal output interface is connected to an external fourth antenna.

[0035] The present application also provides an intelligent terminal, comprising: a radio frequency unit and a processor; wherein the radio frequency unit comprises the power detection circuit described in any one of the above items.

[0036] The power detection circuit of the present application includes: at least one group of cascaded first coupling devices and second coupling devices; wherein the detection signal output port of the second coupling device is connected to the idle port of the first coupling device, and the detection signal output port of the first coupling device is connected to the power detection port of the radio frequency transceiver; wherein the radio frequency transceiver is a device in the radio frequency unit where the power detection circuit is located; the first power detection signal detected by the first coupling device is fed back to the power detection port of the radio frequency transceiver through the detection signal output port of the first coupling device; optionally, the second power detection signal detected by the second coupling device flows into the idle port of the first coupling device through the detection signal output port of the second coupling device, and then fed back to the power detection port of the radio frequency transceiver through the detection signal output port of the first coupling device.

[0037] The technical solution of the present application can realize the switching output of two power detection signals by utilizing the idle port of the first coupling device, thereby solving the problem of high hardware cost caused by separately setting a switching device in the power detection circuit in the prior art, and thus reducing the hardware cost of the power detection circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0039] Figure 1 A schematic diagram of a first power detection circuit provided in the prior art;

[0040] Figure 2 A schematic diagram of a second power detection circuit provided by the prior art;

[0041] Figure 3 A schematic diagram of a third power detection circuit provided by the prior art;

[0042] Figure 4 A schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application;

[0043] Figure 5 A communication network system architecture diagram provided for an embodiment of the present application;

[0044] Figure 6is a schematic structural diagram of a power detection circuit according to the first embodiment;

[0045] Figure 7 is a schematic structural diagram of a power detection circuit according to a second embodiment;

[0046] Figure 8 is a schematic structural diagram of a power detection circuit according to a third embodiment;

[0047] Fig. 9 is a schematic structural diagram of a power detection circuit according to a fourth embodiment;

[0048] Fig.10 is a schematic structural diagram of a coupler according to a fourth embodiment;

[0049] Fig.11 is a schematic diagram of the operation of two-way coupler cascade according to the fourth embodiment;

[0050] Fig.12 is a schematic diagram of a third coupler and a switch device inside a third amplifier according to a fourth embodiment;

[0051] Fig.13 It is a schematic diagram of a fourth coupler inside a transmitting module according to a fourth embodiment.

[0052] The realization of the purpose, functional features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The above-mentioned drawings have shown clear embodiments of this application, which will be described in more detail later. These drawings and textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0053] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0054] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, article or device including the element. Optionally, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context in the specific embodiment.

[0055] It should be understood that, although the terms first, second, third, etc. may be used to describe various information in this article, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this article, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination". Furthermore, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate that there are the described features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or", "and / or", "including at least one of the following" etc. used in this application can be interpreted as inclusive, or mean any one or any combination. For example, “comprising at least one of the following: A, B, C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”, and for another example, “A, B or C” or “A, B and / or C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”. An exception to this definition will only occur when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.

[0056] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are displayed in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and it can be performed in other orders. Moreover, at least a portion of the steps in the figure may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0057] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0058] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0059] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present application, and have no specific meanings. Therefore, "module", "component" or "unit" can be used in a mixed manner.

[0060] The smart terminal may be implemented in various forms. For example, the smart terminal described in this application may include smart terminals such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminals such as digital TVs and desktop computers.

[0061] The following description will be made by taking a mobile terminal as an example, and those skilled in the art will understand that, in addition to components specifically used for mobile purposes, the construction according to the embodiments of the present application can also be applied to fixed-type terminals.

[0062] See also Figure 4, which is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application, the mobile terminal 100 may include: RF (Radio Frequency, 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 and other components. Those skilled in the art can understand that Figure 4 The structure of the mobile terminal shown in the figure does not constitute a limitation on the mobile terminal. The mobile terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0063] Combine the following Figure 4 The following is a detailed introduction to the various components of the mobile terminal:

[0064] The radio frequency unit 101 can be used for receiving and sending signals during information transmission or communication. Specifically, after receiving the downlink information of the base station, it is sent to the processor 110 for processing; in addition, the uplink data is sent to the base station. Generally, the 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, etc. In addition, the radio frequency unit 101 can also communicate with the network and other devices through wireless communication. The above-mentioned wireless communications can use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), 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 Duplexing-Long Term Evolution), TDD-LTE (Time Division Duplexing-Long Term Evolution) and 5G, etc.

[0065] WiFi is a short-range wireless transmission technology. Mobile terminals can help users send and receive emails, browse web pages, and access streaming media through WiFi module 102. It provides users with wireless broadband Internet access. Figure 4 The WiFi module 102 is shown, but it is understandable that it is not an essential component of the mobile terminal and can be omitted as needed without changing the essence of the present invention.

[0066] The audio output unit 103 can convert the audio data received by the RF unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output it as sound when the mobile terminal 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, etc. Moreover, the audio output unit 103 can also provide audio output related to a specific function performed by the mobile terminal 100 (for example, a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, etc.

[0067] 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, and the graphics processor 1041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The processed image frame can be displayed on the display unit 106. The image frame processed by the graphics processor 1041 can be stored in the memory 109 (or other storage medium) or sent via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 can receive sound (audio data) via the microphone 1042 in a telephone call mode, a recording mode, a voice recognition mode, and other operating modes, and can process such sound into audio data. The processed audio (voice) data can be converted into a format output that can be sent to a mobile communication base station via the radio frequency unit 101 in the case of a telephone call mode. The microphone 1042 can implement various types of noise elimination (or suppression) algorithms to eliminate (or suppress) noise or interference generated in the process of receiving and sending audio signals.

[0068] The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor. Optionally, the ambient light sensor can adjust the brightness of the display panel 1061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 1061 and / or the backlight when the mobile terminal 100 is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that identify the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that can be configured on the mobile phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be repeated here.

[0069] The display unit 106 is used to display information input by the user or information provided to the user. The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0070] The user input unit 107 can be used to receive input digital or character information, and to generate key signal input related to the user settings and function control of the mobile terminal. Optionally, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also known as a touch screen, can collect the user's touch operation on or near it (such as the user's operation on the touch panel 1071 or near the touch panel 1071 using any suitable object or accessory such as a finger, stylus, etc.), and drive the corresponding connection device according to a pre-set program. The touch panel 1071 may include two parts: a touch detection device and a touch controller. Optionally, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into the touch point coordinates, and then sends it to the processor 110, and can receive and execute the command sent by the processor 110. In addition, the touch panel 1071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may further include other input devices 1072. Optionally, the other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, a function key (such as a volume control key, a switch key, etc.), a trackball, a mouse, a joystick, etc., which are not specifically limited here.

[0071] Optionally, the touch panel 1071 may cover the display panel 1061. When the touch panel 1071 detects a touch operation on or near it, it transmits the information to the processor 110 to determine the type of touch event. Then, the processor 110 provides corresponding visual output on the display panel 1061 according to the type of touch event. Figure 4 In the figure, the touch panel 1071 and the display panel 1061 are used as two independent components to implement the input and output functions of the mobile terminal. However, in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated to implement the input and output functions of the mobile terminal, which is not limited here.

[0072] The interface unit 108 serves as an interface through which at least one external device can be connected to the mobile terminal 100. For example, the external device 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 device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, etc. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device 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 an external device.

[0073] The memory 109 can be used to store software programs and various data. The memory 109 can mainly include a program storage area and a data storage area. Optionally, the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory 109 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0074] The processor 110 is the control center of the mobile terminal. It uses various interfaces and lines to connect various parts of the entire mobile terminal. It executes various functions of the mobile terminal and processes data by running or executing software programs and / or modules stored in the memory 109, and calling data stored in the memory 109, so as to monitor the mobile terminal as a whole. The processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor and a modem processor. Optionally, the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 110.

[0075] The mobile terminal 100 may also include a power supply 111 (such as a battery) for supplying power to various components. Preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, thereby implementing functions such as charging, discharging, and power consumption management through the power management system.

[0076] although Figure 4 Not shown, the mobile terminal 100 may further include a Bluetooth module, etc., which will not be described in detail here.

[0077] In order to facilitate understanding of the embodiments of the present application, the communication network system on which the mobile terminal of the present application is based is described below.

[0078] See also Figure 5 , Figure 5 A communication network system architecture diagram is provided for an embodiment of the present application, wherein the communication network system is an LTE system of universal mobile communication 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 operator's IP service 204, which are connected in sequence for communication.

[0079] Optionally, UE201 may be the above-mentioned terminal 100, which will not be described in detail here.

[0080] E-UTRAN 202 includes eNodeB 2021 and other eNodeBs 2022 , etc. Optionally, eNodeB 2021 may be connected to other eNodeBs 2022 via a backhaul (eg, an X2 interface), and eNodeB 2021 is connected to EPC 203 , and eNodeB 2021 may provide UE 201 with access to EPC 203 .

[0081] EPC203 may include MME (Mobility Management Entity) 2031, HSS (Home Subscriber Server) 2032, other MMEs 2033, SGW (Serving Gate Way) 2034, PGW (PDN Gate Way) 2035 and PCRF (Policy and Charging Rules Function) 2036, etc. Optionally, MME 2031 is a control node that processes signaling between UE 201 and EPC 203, and provides bearer and connection management. HSS 2032 is used to provide some registers to manage functions such as home location register (not shown in the figure), and store some user-specific information such as service features and data rates. All user data can be sent through SGW2034, PGW2035 can provide IP address allocation and other functions for UE 201, PCRF2036 is the policy and charging control policy decision point for service data flow and IP bearer resources, which selects and provides available policy and charging control decisions for the policy and charging execution function unit (not shown in the figure).

[0082] The IP service 204 may include the Internet, an intranet, an IMS (IP Multimedia Subsystem) or other IP services.

[0083] Although the above introduction takes the LTE system as an example, those skilled in the art should know that the present application is not only applicable to the LTE system, but also to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA and future new network systems (such as 5G), etc., without limitation here.

[0084] Based on the above-mentioned mobile terminal hardware structure and communication network system, various embodiments of the present application are proposed.

[0085] First embodiment

[0086] Figure 6 FIG. 1 is a schematic diagram of the structure of a power detection circuit according to the first embodiment. Figure 6As shown, a power detection circuit comprises: at least one set of cascaded first coupling devices CD1 and second coupling devices CD2; optionally, the detection signal output port PD23 of the second coupling device is connected to the idle port PD14 of the first coupling device, and the detection signal output port PD13 of the first coupling device is connected to the power detection port of the radio frequency transceiver RF; optionally, the radio frequency transceiver RF is a device in the radio frequency unit where the power detection circuit is located.

[0087] Optionally, the first power detection signal detected by the first coupling device CD1 is fed back to the power detection port of the radio frequency transceiver RF via the detection signal output port PD13 of the first coupling device.

[0088] Optionally, the second power detection signal detected by the second coupling device CD2 flows into the idle port PD14 of the first coupling device through the detection signal output port PD23 of the second coupling device, and then is fed back to the power detection port of the radio frequency transceiver RF through the detection signal output port PD13 of the first coupling device.

[0089] Optionally, the first power detection signal output by the first coupling device CD1 and the second power detection signal output by the second coupling device CD2 are power detection signals detected for different TX paths. The embodiment of the present application does not specifically limit the structures of the first coupling device CD1 and the second coupling device CD2.

[0090] The technical solution of the present application can realize the switching output of the two power detection signals, the first power detection signal and the second power detection signal, by utilizing the idle port PD14 of the first coupling device, thereby solving the problem of high hardware cost caused by separately setting a switching device in the power detection circuit in the prior art, and thereby reducing the hardware cost of the power detection circuit.

[0091] Second embodiment

[0092] Figure 7 FIG. 1 is a schematic diagram of the structure of a power detection circuit according to the second embodiment. Figure 7 As shown, the first coupling device includes a first coupler CPL1, and the first coupler CPL1 includes: a first RF signal input port P11, a first RF signal output port P12, a first coupling port P13 and a first TERM port P14. Optionally, the first RF signal input port P11 is connected to the first output port of the RF transmitting circuit, and the first RF signal output port P12 is connected to the first external antenna ANT1. Optionally, the RF transmitting circuit is a device disposed inside the RF unit and including a RF transceiver RF; the first coupling port P13 is the detection signal output port PD13 of the first coupling device provided in the first embodiment, and the first TERM port P14 is the idle port PD14 of the first coupling device.

[0093] Optionally, the first output port of the RF transmitting circuit may refer to the first transmitting port of the RF transceiver RF. When the RF signal transmitted by the first output port of the RF transmitting circuit is detected, the first coupling port P13 may output the first power detection signal.

[0094] like Figure 7 As shown, the second coupling device includes a second coupler CPL2, and the second coupler CPL2 includes: a second RF signal input port P21, a second RF signal output port P22, a second coupling port P23 and a second TERM port P24; optionally, the second RF signal input port P21 is connected to the second output port of the RF transmitting circuit, and the second RF signal output port P22 is connected to the external second antenna ANT2; the second coupling port P23 is the detection signal output port PD23 of the second coupling device provided in the first embodiment, and the second TERM port P24 is grounded through the first resistor R1.

[0095] Optionally, the second output port of the RF transmitting circuit may refer to the second transmitting port of the RF transceiver RF. When the RF signal transmitted by the second output port of the RF transmitting circuit is detected, the embodiment of the present application can realize the transmission of the second power detection signal to the first coupler CPL1 through the second coupling port P23 and the first TERM port P14, and then realize the output of the second power detection signal to the power detection port of the RF transceiver RF through the first coupling port P13.

[0096] An embodiment of the present application provides an example of a power detection circuit, through which the switching output of two power detection signals can be realized, thereby solving the problem of high hardware cost caused by separately setting a switching device in the power detection circuit in the prior art, thereby reducing the hardware cost of the power detection circuit.

[0097] Third embodiment

[0098] Figure 8 FIG. 1 is a schematic diagram of the structure of a power detection circuit according to the third embodiment. Figure 8 As shown, the first coupling device is an internal component arranged inside the amplifier PA in the radio frequency unit, and the first coupling device includes a third coupler CPL3 and a switch device SD. The above amplifier may refer to a power amplifier (Power Amplifier, PA).

[0099] Optionally, the third coupler CPL3 includes a third RF signal input port P31, a third RF signal output port P32, a third coupling port P33 and a third TERM port P34, and the switch device SD includes a first detection signal selection input port SI1, a second detection signal selection input port SI2 and a detection signal selection output port SO;

[0100] Optionally, the third coupling port P33 is connected to the first detection signal selection input port SI1, the third TERM port P34 is grounded through the second resistor R2, the second detection signal selection input port SI2 is the idle port PD14 of the first coupling device, and the detection signal selection output port SO is the detection signal output port PD13 of the first coupling device.

[0101] Optionally, the amplifier PA further includes a first RF signal input interface (not shown in FIG. Figure 8 Indicated in) and the second RF signal output interface (not in Figure 8 (indicated in Chinese);

[0102] Optionally, the first RF signal input interface is connected to the third output port of the RF transmitting circuit, and the second RF signal output interface is connected to an external third antenna ANT3.

[0103] Optionally, the amplifier PA receives the RF signal transmitted from the third output port of the RF transmitting circuit through the first RF signal input interface. The RF signal flowing into the interface subsequently flows through other circuits in the amplifier PA, and is finally input into the third coupler CPL3 through the third RF signal input port P31, and is sent to the third antenna ANT3 through the third RF signal output port P32. The second RF signal output interface can be understood as the above-mentioned third RF signal output port P32.

[0104] Optionally, the third output port of the radio frequency transmitting circuit may refer to an output port of other circuits in the amplifier PA.

[0105] Alternatively, if Figure 8 As shown, the second coupling device is an internal component arranged inside the transmitting module TXM in the radio frequency unit, and the second coupling device includes a fourth coupler CPL4, and the fourth coupler CPL4 includes a fourth radio frequency signal input port P41, a second radio frequency signal output interface P42, and a fourth coupling port P43;

[0106] Optionally, the fourth RF signal input port P41 receives the RF signal flowing into the fourth coupler CPL4, and the fourth RF signal output port P42 outputs the RF signal; the fourth coupling port P43 is the detection signal output port PD23 of the second coupling device. Figure 8As shown, the fourth radio frequency signal output port P42 is connected to the fourth antenna ANT4 in the outside world through a capacitor. The capacitor is also grounded through a first resistor R1.

[0107] Optionally, the transmitting module TXM further includes a second RF signal input interface (not shown in Figure 8 Indicated in) and the second RF signal output interface (not in Figure 8 Indicated in the figure); Optionally, the second RF signal input interface is connected to the fourth output port of the RF transmitting circuit, and the second RF signal output interface is connected to the fourth external antenna. Optionally, the second RF signal input interface receives the RF signal emitted by the fourth output port of the RF transmitting circuit. The RF signal flowing into this interface subsequently flows through other circuits in the transmitting module TXM, and is finally input into the fourth coupler CPL4 through the fourth RF signal input port P41, and is sent to the fourth antenna ANT4 through the fourth RF signal output port P42 through the matching circuit (including but not limited to: capacitor, etc.). Figure 8 As shown, the second RF signal output interface is equivalent to one side of the capacitor connected to the external fourth antenna ANT4.

[0108] Optionally, the fourth output port of the RF transmitting circuit may refer to an output port of other circuits in the transmitting module TXM.

[0109] The embodiment of the present application provides another example of a power detection circuit, through which the switching output of two power detection signals can be realized, thereby solving the problem of high hardware cost caused by separately setting a switching device in the power detection circuit in the prior art, thereby reducing the hardware cost of the power detection circuit.

[0110] Fourth embodiment

[0111] Fig. 9 FIG. 1 is a schematic diagram of the structure of a power detection circuit according to the fourth embodiment. Fig. 9 As shown, the power detection circuit includes: a first coupler CPL1, a second coupler CPL2, a third coupler CPL3 and a switch device SD in a third amplifier PA3, and a fourth coupler CPL4 in a transmitting module TXM. The power detection circuit is used to form a radio frequency unit; optionally, the radio frequency unit may also include: a radio frequency transceiver RF, a first amplifier PA1, a second amplifier PA2, other circuit structures in the third amplifier PA3 except the third coupler CPL3 and the switch device SD, a first duplexer DUPX1, a second duplexer DUPX2, a third duplexer DUPX3, and other circuit structures in the transmitting module TXM except the fourth coupler CPL4.

[0112] Optionally, the embodiments of the present application do not specifically limit the description of devices such as a coupler (Coupler, CPL), a duplexer (Duplexer, DPX), and a transmit module (Transmit module, TXM).

[0113] This embodiment utilizes the device characteristics of the coupler CPL, the third coupler CPL3 and the switch device SD inside the third amplifier PA3 device, and the fourth coupler CPL4 inside the transmitting module TXM device, and adopts a new RF architecture design. While meeting the same functions, the SPDT / DPDT / DP4T and other devices in the original power detection circuit are removed. The main difference from the original solution is that the transmission of different power detection signals is achieved by utilizing the idle port of the coupler.

[0114] Alternatively, if Fig. 9 As shown, the TX0_MHB1 port and the TX0_LB0 port of the RF transceiver RF output two RF transmission signals (it should be noted that the two paths do not work at the same time), and the first RF transmission signal is sent to the first antenna ANT1 through the second amplifier PA2, the second duplexer DUPX2, and the first coupler CPL1. During the transmission process, the first power detection signal detected by the first coupler CPL1 is directly fed back to the MRX0 port of the RF transceiver RF (the path is as shown in FIG. Fig. 9 The second RF transmission signal is sent to the second antenna ANT2 via the second amplifier P2, the third duplexer DUPX3, and the second coupler CPL2. During the transmission process, the second power detection signal detected by the second coupler CPL2 is sent to the first coupling port P13 on the first coupler CPL1 (the path is shown in FIG. Fig. 9 ), and then returns to the MRX0 port of the RF transceiver RF through path L1.

[0115] Alternatively, if Fig.10 As shown, in order to improve the circuit stability, the embodiment of the present application may be provided with a first matching circuit between the IN port of the coupler CPL and the circuit to be connected thereto, a second matching circuit between the OUT port of the coupler CPL and the circuit to be connected thereto, and a third matching circuit between the COUPLING of the coupler CPL and the circuit to be connected thereto. The matching circuit may include components such as capacitors and resistors, and the embodiment of the present application does not specifically limit the specific structure of any matching circuit, the connection relationship of components, etc.

[0116] Optionally, the schematic diagram of the coupler CPL is as follows Fig.10As shown, the RF transmission signal enters from the IN port of the coupler CPL and is output from the OUT port of the coupler CPL, while the power detection signal is output from the COUPLING port of the coupler CPL. The current flow direction of the power detection signal is opposite to the current flow direction of the RF transmission signal. The TERM port of some couplers CPL (such as the second coupler CPL2) is grounded through a 50Ω resistor.

[0117] like Fig.11 As shown, in the embodiment of the present application, the first RF signal input port P11 is provided with a peripheral circuit: the eleventh matching circuit MC11, the first RF signal output port P12 is provided with a peripheral circuit: the twelfth matching circuit MC12, and the first coupling port P13 is provided with a peripheral circuit: the thirteenth matching circuit MC13. Optionally, the embodiment of the present application further provides a peripheral circuit: the twenty-first matching circuit MC21 for the second RF signal input port P21, a peripheral circuit: the twenty-second matching circuit MC22 for the second RF signal output port P22, and a peripheral circuit: the twenty-third matching circuit MC23 for the second coupling port P13.

[0118] Optionally, the first TERM port P14 is connected to the second coupling port P23, and the second TERM port P24 is grounded through a resistor, the resistance of the resistor may be 50Ω, and the embodiment of the present application does not specifically limit the resistance of the resistor.

[0119] Alternatively, if Fig.11 As shown, the solid line with an arrow pointing to the right is used to indicate the flow direction of the RF signal emitted by the RF transceiver RF through the TX0_MHB1 port after passing through the second amplifier PA2 and the second duplexer DUPX2, and the solid line with an arrow pointing to the left is used to indicate the flow direction of the power detection signal detected by the first coupler CPL1; the dotted line with an arrow pointing to the left is used to indicate the flow direction of the RF signal emitted by the RF transceiver RF through the TX0_LB0 port after passing through the second amplifier PA2 and the third duplexer DUPX3, and the dotted line with an arrow pointing to the left is used to indicate the flow direction of the power detection signal detected by the second coupler CPL2.

[0120] Alternatively, if Fig. 9 and Fig.12 As shown, the TX1_CB0 port and the TX1_MHB0 port of the RF transceiver RF output two RF transmission signals (it should be noted that the two paths do not work at the same time), and the third RF transmission signal is sent to the third antenna ANT3 via the third amplifier P3. During the transmission process, the third power detection signal detected by the third coupler CPL3 inside the third amplifier P3 is directly fed back to the MRX1 port of the RF transceiver RF through the switch device SD (the path is as shown in FIG. Fig. 9The fourth RF transmission signal is sent to the fourth antenna ANT4 via the first amplifier PA1, the first duplexer DUPX1, and the fourth coupler CPL4 in the transmission module. During the transmission process, the fourth power detection signal detected by the fourth coupler CPL4 is sent to one end of the switch device SD connected to the third coupler CPL3 (the path is shown in FIG. Fig. 9 ), and then returns to the MRX1 port of the RF transceiver RF through path L3.

[0121] Alternatively, if Fig. 9 and 12 As shown, the radio frequency signal (which can be understood as the radio frequency transmission signal) transmitted by the radio frequency transceiver RF through the TX1_CB0 port flows into the third amplifier PA3. Inside the third amplifier PA3, the radio frequency signal flows through the internal device to the third coupler CPL3, and then is disconnected by the switch device SD, and is output to the second power detection port MRX1 of the radio frequency transceiver RF through the port CPL_OUT of the third amplifier PA3.

[0122] Optionally, the RF signal (which can be understood as a RF transmission signal) transmitted by the RF transceiver RF through the TX1_MHB0 port flows into the transmission module TXM through the first amplifier PA1 and the first duplexer DUPX1. Inside the transmission module TXM, the RF signal flows through the fourth coupler CPL4 through the internal device, and then is connected to the switch device SD through the port CPL_IN of the third amplifier PA3, and then the switch device SD performs a disconnection operation, and is output to the second power detection port MRX1 of the RF transceiver RF through the port CPL_OUT of the third amplifier PA3.

[0123] The present application embodiment provides an example structure of a transmitting module TXM, such as Fig.13 As shown, the transmitting module TXM includes: an amplifier PA, a semiconductor controller CMOS Controller including a MIPI interface, a switch SWITCH of model SP16T, a fourth coupler CPL4 and other devices. The transmitting module also includes: HB_SWOUT, TX_HB_IN, TX_LB_IN, LB_SWOUT, VRAMP, VIO, SCLK, TRX1~TRX14 and other interfaces.

[0124] In the 5G architecture design, when the number of power detection loops is greater than 2 and the RF receiver has only 2 power detection ports, the power detection circuit provided in the embodiment of the present application can be used to implement the power detection function. This embodiment can reduce the cost of motherboard electronic materials, reduce the area of ​​PCB ornaments, and avoid waste of resources (i.e., GPIO ports and MIPI ports).

[0125] Fifth embodiment

[0126] like Figure 4 As shown, an embodiment of the present application provides a smart terminal, which includes a radio frequency unit 101 and a processor 110; optionally, the radio frequency unit 101 includes a power detection circuit as provided in any embodiment.

[0127] In the embodiments of the smart terminal provided in the present application, all technical features of any embodiment may be included, and the specification expansion, explanation content and beneficial effects are basically the same as those of the embodiments of the above-mentioned power detection circuit, and will not be repeated here.

[0128] It is understood that the above scenarios are only examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of the present application. The technical solutions of the present application can also be applied to other scenarios. For example, it is known to those skilled in the art that with the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0129] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0130] The working process of the power detection circuit provided in the embodiment of the present application can be adjusted, merged and deleted in sequence according to actual needs.

[0131] The units in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0132] In the present application, the same or similar terminology concepts, technical solutions and / or application scenario descriptions are generally described in detail only the first time they appear. When they appear again later, they are generally not repeated for the sake of brevity. When understanding the technical solutions and other contents of the present application, for the same or similar terminology concepts, technical solutions and / or application scenario descriptions that are not described in detail later, reference can be made to the previous related detailed descriptions.

[0133] In the present application, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0134] The various technical features of the technical solution of the present application can be arbitrarily combined. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

[0135] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loading and executing computer program instructions on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, a data center, etc. that contains one or more available media integrated. The available medium can be a magnetic medium, (e.g., a floppy disk, a storage disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state storage disk Solid State Disk (SSD)), etc.

[0136] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A power detection circuit, characterized in that: It comprises at least one set of cascaded first coupling devices and second coupling devices; the detection signal output port of the second coupling device is connected to the idle port of the first coupling device, and the detection signal output port of the first coupling device is connected to the power detection port of the radio frequency transceiver; The first power detection signal detected by the first coupling device is sent to the power detection port of the radio frequency transceiver via the detection signal output port of the first coupling device; And / or, the second power detection signal detected by the second coupling device flows into the idle port of the first coupling device through the detection signal output port of the second coupling device, and is then sent to the power detection port of the RF transceiver through the detection signal output port of the first coupling device.

2. The power detection circuit according to claim 1, characterized in that: The first coupling device comprises a first coupler, the first coupler comprises a first coupling port and a first TERM port; The first coupling port is a detection signal output port of the first coupling device; and / or, The first TERM port is a free port of the first coupling device.

3. The power detection circuit according to claim 1, characterized in that: The first coupling device includes a first radio frequency signal input port and a first radio frequency signal output port; The first RF signal input port is connected to the first output port of the RF transmitting circuit; and / or, The first radio frequency signal output port is connected to the first antenna.

4. The power detection circuit according to claim 1, characterized in that: The second coupling device comprises a second coupler, and the second coupler comprises a second coupling port, a second TERM port, a second RF signal input port, and a second RF signal output port; Include at least one of the following: The second coupling port is a detection signal output port of the second coupling device; The second TERM port is grounded via a first resistor; The second RF signal input port is connected to the second output port of the RF transmitting circuit; The second radio frequency signal output port is connected to the second antenna.

5. The power detection circuit according to any one of claims 1 to 4, characterized in that: The first coupling device includes an internal component arranged inside an amplifier in the radio frequency unit, and the first coupling device includes a third coupler and a switch device.

6. The power detection circuit according to claim 5, characterized in that: The third coupler includes a third coupling port and a third TERM port, and the switch device includes a first detection signal selection input port, a second detection signal selection input port and a detection signal selection output port; The third coupling port is connected to the first detection signal selection input port; The third TERM port is grounded via a second resistor; The second detection signal selects the input port to be an idle port of the first coupling device; The detection signal selection output port is the detection signal output port of the first coupling device.

7. The power detection circuit according to claim 5, characterized in that: The amplifier also includes a first radio frequency signal input interface and a second radio frequency signal output interface; The first RF signal input interface is connected to the third output port of the RF transmitting circuit; and / or, The second radio frequency signal output interface is connected to the third antenna.

8. The power detection circuit according to claim 5, characterized in that: The second coupling device includes an internal component arranged inside the transmitting module in the radio frequency unit, the second coupling device includes a fourth coupler, and the fourth coupler includes a fourth coupling port; The fourth coupling port comprises a detection signal output port of the second coupling device.

9. The power detection circuit according to claim 8, characterized in that: The transmitting module also includes a second RF signal input interface and a second RF signal output interface; The second RF signal input interface is connected to a fourth output port of the RF transmitting circuit; and / or the second RF signal output interface is connected to a fourth antenna.

10. An intelligent terminal, characterized in that: The method comprises a power detection circuit as claimed in any one of claims 1 to 9.

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