Temperature detection circuit, radio frequency module and electronic equipment

Abstract

The utility model discloses a temperature detection circuit, a radio frequency module and electronic equipment, and relates to the technical field of temperature detection.The temperature detection circuit comprises a first temperature detection device, a second temperature detection device and a switch assembly, the first temperature detection device is arranged close to one of a plurality of power amplifiers, and the second temperature detection device is arranged close to the other of the power amplifiers; the temperature sensor is used for detecting the temperature of the close power amplifier; the second temperature detection device is arranged close to the other one of the plurality of power amplifiers and is used for detecting the temperature of the power amplifier close to the second temperature detection device; the first end of the switch assembly is connected with the input end of the temperature controller, and the two second ends of the switch assembly are connected with the first temperature detection device and the second temperature detection device respectively. The switch assembly is used for conducting the electric connection between the first end and any second end, disconnecting the electric connection between the first end and the other second ends, and outputting a corresponding temperature detection signal to the temperature controller. The utility model aims to improve the accuracy of temperature detection of the power amplifier.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of temperature detection, in particular to a temperature detection circuit, a radio frequency module and an electronic device. BACKGROUND

[0002] In the field of communication modules, one of the key measures to ensure that the module can operate normally under various environmental conditions is the temperature control strategy. As a key component in the communication module, the working temperature of the radio frequency power amplifier (PA) directly affects the communication quality and reliability. Therefore, obtaining the temperature information of the radio frequency PA through the ADC interface of the temperature controller becomes an important basis for taking appropriate temperature control measures. Traditionally, in order to monitor the working temperature of the PA which does not work at the same time, a thermistor is usually placed between these PAs to detect temperature changes. This arrangement aims to use a single thermistor to monitor the temperature of the two non-simultaneously working PAs. However, placing a thermistor between the two PAs which do not work at the same time cannot accurately detect the temperature of the PA which is currently working, and cannot meet the demand for accurate temperature monitoring of the radio frequency PA, limiting the effectiveness and response speed of the temperature control strategy. CONTENT

[0003] The main purpose of the present application is to provide a temperature detection circuit, a radio frequency module and an electronic device, which aims to improve the accuracy of temperature detection of the power amplifier.

[0004] To achieve the above purpose, the present application provides a temperature detection circuit applied to a radio frequency module, wherein the radio frequency module comprises a temperature controller and a plurality of power amplifiers, and the temperature detection circuit comprises:

[0005] A first temperature detection device is arranged close to one of the plurality of power amplifiers, and is used to detect the temperature of the power amplifier arranged close to the first temperature detection device;

[0006] A second temperature detection device is arranged close to another one of the plurality of power amplifiers, and is used to detect the temperature of the power amplifier arranged close to the second temperature detection device;

[0007] A switch assembly has a first end and two second ends, the first end is electrically connected with the input end of the temperature controller, and the two second ends are respectively electrically connected with the first temperature detection device and the second temperature detection device;

[0008] The switch assembly is used to turn on the electrical connection between the first end and any one of the second ends, and turn off the electrical connection between the first end and the remaining second ends, so as to output the corresponding temperature detection signal to the temperature controller.

[0009] In an embodiment, the temperature detection circuit further comprises:

[0010] a control circuit, a control end of the control circuit being electrically connected with a controlled end of the switch assembly;

[0011] the control circuit is configured to control the switch assembly to turn on electrical connection between the first end and any one of the second ends, and to turn off electrical connection between the first end and the rest of the second ends.

[0012] In an embodiment, the number of the first temperature detection devices and the second temperature detection devices is multiple.

[0013] the switch assembly comprises a plurality of first switch devices, two second ends of each of the first switch devices being connected with a first temperature detection device and a second temperature detection device respectively.

[0014] In an embodiment, the switch assembly comprises one or more combinations of a single-pole double-throw switch, a multi-way switch, and a gating chip.

[0015] In an embodiment, the number of the first temperature detection devices and the second temperature detection devices is multiple.

[0016] the switch assembly comprises:

[0017] a second switch device comprising a first end and a plurality of second ends, the first end of the second switch device being electrically connected with an input end of the temperature controller, and the plurality of second ends of the second switch device being connected with the plurality of first temperature detection devices and the plurality of second temperature detection devices one by one.

[0018] In an embodiment, the switch assembly comprises one or more combinations of a single-pole multi-throw switch, a multi-way switch, and a gating chip.

[0019] In an embodiment, the first temperature detection device and the second temperature detection device each comprises any one or more combinations of a thermistor, a thermocouple, and an infrared temperature sensor.

[0020] The utility model further provides a radio frequency module which comprises the temperature detection circuit of any one of the above, a temperature controller and a plurality of power amplifiers.

[0021] The first temperature detection device and the second temperature detection device of the temperature detection circuit are arranged close to any two of the plurality of power amplifiers.

[0022] In an embodiment, the input end of the temperature controller is an analog / digital converter interface.

[0023] The utility model also proposes an electronic equipment, including the temperature detection circuit of any one of above, or including the radio frequency module of any one of above.

[0024] The utility model discloses a temperature detection circuit, be applied to radio frequency module, the radio frequency module includes temperature controller and a plurality of power amplifier, the temperature detection circuit includes first temperature detection device, second temperature detection device and switch component, first temperature detection device is close to a plurality of the power amplifier one and is arranged, is used for detecting the temperature of the power amplifier that oneself is close to setting, second temperature detection device is close to a plurality of the power amplifier another and is arranged, is used for detecting the temperature of the power amplifier that oneself is close to setting, the switch component has first end and two second ends, first end and temperature controller's input electric connection, two second ends are connected with first temperature detection device and second temperature detection device electrically respectively, the switch component is used to the electric connection between first end and any one second end is switched on, and the electric connection between first end and remaining second end is disconnected, to export corresponding temperature detection signal to temperature controller.

[0025] In practical application, the utility model discloses through setting temperature detection device in each power amplifier alone, and according to actual demand, through switch component, the electric connection path between temperature controller and temperature detection device is switched. Thus, can place one thermistor in the vicinity of two PAs of different working, realizes accurate temperature detection to the PA that is working currently, to meet the demand of accurate temperature monitoring to radio frequency PA, improves the effectiveness and response speed of temperature control strategy, and then improves the reliability of radio frequency module and communication module work. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the drawing needed to be used in the embodiment or prior art description simple introduction, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, according to the structure shown in these drawings, other drawings can also be obtained.

[0027] Figure 1 It is the module schematic view of the embodiment of the utility model temperature detection circuit;

[0028] Figure 2 It is the module schematic view of another embodiment of the utility model temperature detection circuit;

[0029] Figure 3 It is the module schematic view of still another embodiment of the utility model temperature detection circuit;

[0030] Figure 4 A module schematic view of another embodiment of the temperature detection circuit of the utility model;

[0031] Figure 5 A specific circuit schematic view of an embodiment of the temperature detection circuit of the utility model;

[0032] Figure 6 A circuit schematic view of an embodiment of the temperature detection circuit of the power amplifier in the prior art;

[0033] Figure 7 A FBRX signal switching logic schematic view;

[0034] Figure 8 A FBRX signal switching logic table;

[0035] Figure 9 A temperature sampling signal switching logic table of an embodiment of the temperature detection circuit of the utility model.

[0036] Explanation of the reference signs:

[0037] 10, first temperature detection device; 20, second temperature detection device; 30, switch assembly; 40, control circuit; 31, first switch device; 32, second switch device.

[0038] The utility model realizes the purpose, functional characteristics and advantages, which will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.

[0040] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one feature. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0041] In the field of communication modules, one of the key measures to ensure that the module can operate normally under various environmental conditions is the temperature control strategy. As a key component in the communication module, the working temperature of the radio frequency power amplifier (PA) directly affects the communication quality and reliability. Therefore, obtaining the temperature information of the radio frequency PA through the ADC interface of the temperature controller becomes an important basis for taking appropriate temperature control measures. Traditionally, in order to monitor the working temperature of the PA which works at different time, a thermistor is usually placed between these PAs to detect temperature changes. This arrangement aims to use a single thermistor to monitor the temperature of the two non-simultaneous working PAs. However, placing a thermistor between the two PAs which work at different times cannot accurately detect the temperature of the PA which is currently working, cannot meet the demand for accurate temperature monitoring of the radio frequency PA, and limits the effectiveness and response speed of the temperature control strategy.

[0042] It can be understood that, as Figure 6 shown, LMH PA1, LMH PA2, UHB PA1, UHB PA2 are four power amplifiers, LMH PA1, LMH PA2 work in low, medium and high frequency bands, and UHB PA1, UHB PA2 work in ultra-high frequency bands. Therefore, in the related art, a thermistor is usually placed between two PAs which work at different times to detect temperature changes, that is, a thermistor is arranged between LMH PA1 and UHB PA1, and a thermistor is arranged between LMH PA2 and UHB PA2. However, since the thermistor is located between two PAs which work at different times, the temperature it measures is actually the combined temperature result of the surrounding environment and the heat emitted by the two PAs. This means that it cannot accurately reflect the actual working temperature of any PA. In addition, when one of the PAs is in a high-load running state, the heat generated by it may be absorbed or dissipated by the environment around the other PA which is not working, resulting in distorted temperature readings.

[0043] Therefore, with reference to Figure 1 , the utility model provides a temperature detection circuit applied to a radio frequency module, the radio frequency module comprises a temperature controller and a plurality of power amplifiers, and the temperature detection circuit comprises:

[0044] a first temperature detection device 10, the first temperature detection device 10 is arranged close to one of the plurality of power amplifiers, and is used to detect the temperature of the power amplifier arranged close to itself;

[0045] a second temperature detection device 20, the second temperature detection device 20 is arranged close to another one of the plurality of power amplifiers, and is used to detect the temperature of the power amplifier arranged close to itself;

[0046] A switch assembly 30 has a first end and two second ends, the first end is electrically connected with the input end of the temperature controller, and the two second ends are respectively electrically connected with the first temperature detection device 10 and the second temperature detection device 20;

[0047] The switch assembly 30 is used to turn on the electrical connection between the first end and any one of the second ends, and turn off the electrical connection between the first end and the remaining second end, so as to output the corresponding temperature detection signal to the temperature controller.

[0048] In the embodiment, the first temperature detection device 10 and the second temperature detection device 20 can be realized by any one or a combination of thermistors, thermocouples and infrared temperature sensors. The switch assembly 30 can be realized by radio frequency switches, multi-way selection switches, gating chips, etc.

[0049] Specifically, taking the temperature detection of two power amplifiers as an example, the first temperature detection device 10 can be arranged close to the power amplifier 1 and away from the power amplifier 2, and the second temperature detection device 20 can be arranged close to the power amplifier 2 and away from the power amplifier 1. A is the first end of the switch assembly 30, and B and C are the second ends of the switch assembly 30. The first temperature detection device 10 is used to detect the temperature of the power amplifier 1, and the second temperature detection device 20 is used to detect the temperature of the power amplifier 2.

[0050] It should be noted that the switch assembly 30 can be realized by a manual switching device such as a toggle switch or a rotary switch. For example, a two-bit or multi-bit toggle switch can be used to be connected to the first temperature detection device 10 and the second temperature detection device 20 respectively. The user can select which temperature detection signal of the temperature controller receives by manually toggling the switch. The toggle switch can be connected to the first temperature detection device 10 when the position B is selected, and connected to the second temperature detection device 20 when the position C is selected.

[0051] Optionally, the switch assembly 30 can also receive the control signal output by the controller, and according to the control signal, turn on the electrical connection between the first end and any one of the second ends, and turn off the electrical connection between the first end and the other second end, so as to output the corresponding temperature detection signal to the temperature controller. Optionally, the control signal can be a trigger signal output by the temperature controller according to the user triggering the corresponding switch or a control signal output by the control logic stored in advance, so as to control the switch assembly 30 to turn on the electrical connection path between the second end corresponding to the control signal and the first end, and at the same time, turn off the electrical connection path between the first end and the other second end. In this way, the temperature controller can receive the temperature detection signal output by the corresponding temperature detection device, so as to obtain the temperature information of the PA monitored by the temperature detection device, and then decide whether to take appropriate temperature control measures. For example, when the temperature information of the power amplifier 1 needs to be obtained, the user can send a trigger signal to the temperature controller through the user input interface or the operation of the corresponding trigger switch, so that the temperature controller outputs the corresponding control signal to the switch assembly 30. The switch assembly 30 turns on the electrical connection between the first end A and the second end B, and at the same time turns off the electrical connection between the first end A and the second end C, so that the temperature controller receives the temperature detection signal output by the first temperature detection device 10.

[0052] Optionally, the control signal can also be a control signal output by the control circuit 40 of the temperature detection circuit itself. In the embodiment, with reference to Figure 2 , the temperature detection circuit further comprises:

[0053] a control circuit 40, a control end of the control circuit 40 being electrically connected with a controlled end of the switch assembly 30;

[0054] The control circuit 40 is configured to control the switch assembly 30 to turn on the electrical connection between the first end and any one of the second ends, and turn off the electrical connection between the first end and the other second ends.

[0055] In the embodiment, the control circuit 40 can be implemented by a main controller, such as an MCU, a DSP (Digital Signal Process), an FPGA (Field Programmable Gate Array), a PLC, a SOC (System On Chip), etc.

[0056] Taking temperature detection of the power amplifier 2 as an example, a user can send a trigger signal to the control circuit 40 through a user input interface or operation of a corresponding trigger switch to control the control circuit 40 to output a corresponding control signal to the switch assembly 30. The switch assembly 30 turns on the electrical connection between the first end A and the second end C, while turning off the electrical connection between the first end A and the second end B, so that the temperature controller receives the temperature detection signal output by the second temperature detection device 20 to monitor the temperature of the power amplifier 2, and then determine whether appropriate temperature control measures need to be taken.

[0057] In actual application, the utility model discloses a temperature detection device is arranged separately in each power amplifier, and according to actual demand, the electrical connection path between the temperature controller and the temperature detection device is switched through the switch assembly 30. In this way, one thermistor can be placed near each of the two PAs working at different times to realize accurate temperature detection of the PA currently working, thereby meeting the demand of accurate temperature monitoring of the radio frequency PA, improving the effectiveness and response speed of the temperature control strategy, and further improving the reliability of the radio frequency module and the communication module working.

[0058] It can be understood that, in the related technical solutions, the temperature controller is used to support the ADC interface resource for detecting the temperature of the power amplifier (PA), which is relatively limited, as shown in Figure 6 , usually only two available ADC interfaces. However, with the development and application of 5G technology, the design of the radio frequency front end becomes more and more complex, and it is often necessary to monitor the working temperatures of four or more PAs at the same time to ensure the stability and performance of the system. In this case, the existing number of ADC interfaces obviously cannot meet the demand of real-time temperature monitoring of multiple PAs.

[0059] In a radio frequency communication system, a power amplifier (PA) is used to enhance the signal strength emitted from a radio frequency transceiver so as to be able to transmit over a long distance. However, various distortions and errors may be introduced in the signal amplification process, affecting the communication quality. In order to ensure the signal quality and the stability of the system, a coupler is usually used to feed back a part of the signal amplified by the PA to the radio frequency transceiver, which is called a feedback mechanism or closed-loop control. The inventors have found that the feedback receive (FBRX) signals sent by the radio frequency transceiver to four power amplifiers (PAs) can be switched through three SP2T (single-pole double-throw) switches. These switches are controlled by GPIO control signals, and the switching logic is managed by the driver program of the radio frequency transceiver itself. Specifically, when a certain PA is in a working state, the radio frequency transceiver controls the working state of the three radio frequency switches to switch to the corresponding port to sample the corresponding FBRX signal. As shown in Figure 7 and Figure 8 , the FBRX signal is sampled through the corresponding port, and the sampled signal is converted into a digital signal through an ADC, and then the digital signal is sent to the temperature controller through a digital bus. The temperature controller then analyzes the digital signal to determine the temperature of the corresponding PA. However, the number of ADC interfaces is limited, and it is difficult to meet the demand of real-time temperature monitoring of multiple PAs. Figure 7Fig. 2 is a schematic diagram of FBRX signal switching logic, Figure 8 Fig. 3 is a table of FBRX signal switching logic. For example, when the FBRX signal needs to access the FBRX-LMH-PA1, the transceiver outputs the GPIO2 control signal representing a high level (HIGH), and outputs the GPIO3 control signal to turn on the electrical connection between the transceiver and the FBRX-LMH-PA1.

[0060] Based on this discovery, the inventors propose a radio frequency PA temperature detection scheme for multiplexing FBRX switching logic.

[0061] Reference Figure 3 , the number of the first temperature detection devices 10 and the second temperature detection devices 20 is multiple;

[0062] The switch assembly 30 includes a plurality of first switch devices 31, and two second ends of each of the first switch devices 31 are connected to a first temperature detection device 10 and a second temperature detection device 20, respectively.

[0063] Among them, the switch assembly 30 includes one or more combinations of single-pole double-throw switches, multiplexers, and gating chips.

[0064] Optionally, the first temperature detection device 10 and the second temperature detection device 20 each include any one or more combinations of thermistors, thermocouples, and infrared temperature sensors.

[0065] In this embodiment, the first ends of the plurality of first switch devices 31 can be connected to the ADC interface of the temperature controller MCU, respectively. When four power amplifiers need to be temperature detected, two first temperature detection devices 10 and two second temperature detection devices 20 are set correspondingly. For example, Figure 5As shown, the LMH PA1, UHB PA1, LMH PA2, and UHB PA2 are four power amplifiers, and the four thermistors T1, T2, T3, and T4 are temperature detection devices. The first switching device 31K1 and the first switching device 31K2 are a single-pole double-throw switch SPD2, the MCU is a temperature controller, and the PA-THERM1 and PA-THERM2 are two ADC interfaces. Since the LMH PA1 and the UHB PA1 work in different frequency bands, and the LMH PA2 and the UHB PA2 work in different frequency bands, the PA of different working frequency bands can be connected to the same first switching device 31, that is, the first temperature detection device 10 (T1) is connected to one second end of the first switching device 31 (K1), and the second temperature detection device 20 (T2) is connected to the other second end of the first switching device 31 (K1); similarly, the first temperature detection device 10 (T3) is connected to one second end of the first switching device 31 (K2), and the second temperature detection device 20 (T4) is connected to the other second end of the first switching device 31 (K2)

[0066] Reference Figure 9 , Figure 9 The temperature sampling signal switching logic table of the temperature detection circuit embodiment. When the LMH-PA1 works alone and the remaining power amplifiers do not work, the MCU outputs the GPIO1 control signal to turn on the electrical connection between the second end connected to T1 and the first end of K1, so that the temperature controller MCU obtains the temperature of LMH-PA1. At this time, the MCU can output the GPIO2 control signal to turn on the electrical connection between the second end connected to T3 / T4 and the first end of K2, so that the temperature controller MCU obtains the temperature of the non-working LMH PA2 / UHB PA2. When the LMH PA1 and the LMH PA2 work at the same time and the remaining power amplifiers do not work, the MCU outputs the GPIO1 control signal to turn on the electrical connection between the second end connected to T1 and the first end of K1, so that the temperature controller MCU obtains the temperature of LMH-PA1. At the same time, the MCU outputs the GPIO2 control signal to turn on the electrical connection between the second end connected to T3 and the first end of K2, so that the temperature controller MCU obtains the temperature of LMH PA2.

[0067] By the above setting, by utilizing the existing FBRX signal switching mechanism, accurate temperature detection of the working PA is realized without additional increase of the ADC interface of the temperature controller MCU or complex hardware modification. In addition, by placing a thermistor on each PA side, and using the switch component 30 to access the temperature controller's same ADC interface with signals not working at different times, and the control signal of the switch component 30 multiplexes the electronic switch control logic used by FBRX, accurate temperature detection of the radio frequency PA is realized under the condition of the ADC port limit of the temperature sampling of the PA in the MCU. No additional complexity is needed in the software layer to support the temperature detection function of the PA. Simplify the design, reduce the cost and development cycle. Through effective temperature monitoring, it is helpful to find out the problem of PA overheating in time, so as to take corresponding measures (such as reducing power consumption or heat dissipation), protect the PA from damage, prolong the service life, and improve the overall stability and reliability.

[0068] In another embodiment, referring to Figure 4 , the number of the first temperature detection devices 10 and the second temperature detection devices 20 is multiple;

[0069] The switch component 30 comprises:

[0070] The second switch device 32 comprises a first end and a plurality of second ends, the first end of the second switch device 32 is electrically connected with the input end of the temperature controller, and the plurality of second ends of the second switch device 32 are connected with the plurality of first temperature detection devices 10 and the plurality of second temperature detection devices 20 one by one.

[0071] Among them, the switch component 30 comprises one or more combinations of single-pole multi-throw switch, multi-way switch, gating chip.

[0072] In the embodiment, the first end of the second switch device 32 is connected with the temperature controller MCU, and the plurality of first temperature detection devices 10 and the plurality of second temperature detection devices 20 are connected with different second ends of the second switch device 32 respectively. It should be noted that the number of the second end of the second switch device 32 needs to be greater than or equal to the sum of the number of the first switch device 31 and the second switch device 32, so as to meet the demand of temperature detection of the plurality of power amplifiers.

[0073] Taking the example of needing to support temperature detection of four PAs at the same time, the four PAs are LMH PA1, UHB PA1, LMH PA2, and UHB PA2, and the four temperature detection devices are T1, T2, T3, and T4. Only need to set the four temperature detection devices in one-to-one correspondence with the siege power amplifiers, electrically connect the output ends of T1, T2, T3, and T4 to the second end of the second switching device 32, and electrically connect the first end of the second switching device 32 to the temperature controller. In this way, the temperature controller can control the second switching device 32 to turn on the path between the temperature controller and the output end of any one of the temperature detection devices, so as to realize temperature detection of multiple power amplifiers.

[0074] Through the above setting, the scheme utilizes the switching assembly 30 to realize multiplexing, and only one ADC interface of an MCU is needed to realize temperature monitoring of multiple PAs. The demand for hardware resources is greatly reduced. Since it is not necessary to additionally increase an ADC interface or other complex hardware circuit, the physical design and wiring of the entire system become simpler, and the development cost and difficulty are reduced.

[0075] The utility model also provides a radio frequency module which comprises the temperature detection circuit, and a temperature controller and multiple power amplifiers.

[0076] The first temperature detection device 10 and the second temperature detection device 20 of the temperature detection circuit are arranged close to any two of the multiple power amplifiers.

[0077] The input end of the temperature controller is an analog / digital converter interface.

[0078] In the embodiment, the first temperature detection device 10 and the second temperature detection device 20 can be used for detecting power amplifiers working in different frequency bands, respectively. For example, the first temperature detection device 10 is used for temperature detection of a PA working in an LMH frequency band, and the second temperature detection device 20 is used for temperature detection of a PA working in a UHB frequency band. Alternatively, the first temperature detection device 10 is used for temperature detection of a PA working in a UHB frequency band, and the second temperature detection device 20 is used for temperature detection of a PA working in an LMH frequency band. The analog / digital converter (ADC) interface of the temperature controller converts the analog signals obtained from the temperature detection devices into digital signals, so that the temperature controller MCU can process the digital temperature data and perform corresponding control or alarm operations. For example, the MCU can determine whether it is necessary to take temperature control actions according to a preset temperature threshold, such as adjusting the working state of the PA to prevent overheating or triggering an alarm to notify a user that the device is in a dangerous temperature range.

[0079] Therefore, the accurate temperature detection of the multiple power amplifiers is realized, and problems such as overheating can be found in time, so that corresponding measures (such as reducing power consumption or heat dissipation) can be taken, the equipment is protected from damage, the service life is prolonged, and the stability and reliability of work are improved.

[0080] It is worth noting that, since the radio frequency module of the present application includes the temperature detection circuit described above, the embodiments of the radio frequency module of the present application include all the technical solutions of all the embodiments of the temperature detection circuit described above, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0081] The utility model also proposes an electronic equipment, including any one of the temperature detection circuit described above, or including the radio frequency module described above.

[0082] It is worth noting that, since the electronic equipment of the present application includes the temperature detection circuit described above, or the radio frequency module described above, the embodiments of the electronic equipment of the present application include all the technical solutions of all the embodiments of the temperature detection circuit or the radio frequency module described above, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0083] The above is only optional embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent mechanism transformation or direct / indirect application in other related technical fields under the inventive concept of the utility model is included in the range of the utility model.

Claims

1. A temperature detection circuit, characterized by comprising: The application is applied to a radio frequency module, the radio frequency module comprises a temperature controller and a plurality of power amplifiers, and the temperature detection circuit comprises: a first temperature detection device, which is arranged close to one of the plurality of power amplifiers and is used for detecting the temperature of the power amplifier arranged close thereto; a second temperature detection device, which is arranged close to another of the plurality of power amplifiers and is used for detecting the temperature of the power amplifier arranged close thereto; a switch assembly, which has a first end and two second ends, the first end is electrically connected with an input end of the temperature controller, and the two second ends are respectively electrically connected with the first temperature detection device and the second temperature detection device; the switch assembly is used for turning on the electrical connection between the first end and any one of the second ends, and turning off the electrical connection between the first end and the other second end, so as to output a corresponding temperature detection signal to the temperature controller.

2. The temperature detection circuit according to claim 1, wherein The temperature detection circuit further comprises: a control circuit, a control end of the control circuit is electrically connected with a controlled end of the switch assembly; the control circuit is used for controlling the switch assembly to turn on the electrical connection between the first end and any one of the second ends, and turn off the electrical connection between the first end and the other second end.

3. The temperature detection circuit according to claim 1, wherein The number of the first temperature detection device and the second temperature detection device is both a plurality; the switch assembly comprises a plurality of first switch devices, and two second ends of each first switch device are respectively connected with a first temperature detection device and a second temperature detection device.

4. The temperature detection circuit according to claim 3, wherein The switch assembly comprises one or more combinations of a single-pole double-throw switch, a multi-way selection switch and a gating chip.

5. The temperature sensing circuit of claim 1, wherein, The number of the first temperature detection device and the second temperature detection device is both a plurality; the switch assembly comprises: a second switch device, which comprises a first end and a plurality of second ends, the first end of the second switch device is electrically connected with an input end of the temperature controller, and the plurality of second ends of the second switch device are connected with a plurality of first temperature detection devices and a plurality of second temperature detection devices in one-to-one correspondence.

6. The temperature sensing circuit of claim 5, wherein, The switch assembly comprises one or more combinations of a single-pole multi-throw switch, a multi-way selection switch and a gating chip.

7. The temperature detection circuit according to any one of claims 1 to 6, wherein The first temperature detection device and the second temperature detection device respectively comprise any one or more combinations of a thermistor, a thermocouple and an infrared temperature sensor.

8. A radio frequency module, characterized by The temperature detection circuit comprises any one of claims 1 to 7, and a temperature controller and a plurality of power amplifiers; The first temperature detection device and the second temperature detection device of the temperature detection circuit are arranged close to any two of the plurality of power amplifiers.

9. The radio module of claim 8, wherein the first and second conductive layers are formed of a conductive material selected from the group consisting of copper, aluminum, silver, gold, and combinations thereof. The input end of the temperature controller is an analog / digital converter interface.

10. An electronic device, comprising: The electronic device comprises the temperature detection circuit of any one of claims 1 to 7, or comprises the radio frequency module of any one of claims 8 to 9.

Images