WO2016045093A1 - Terminal d'accès à internet sans fil, appareil de commande de limitation de courant et procédé de commande de limitation de courant - Google Patents

Terminal d'accès à internet sans fil, appareil de commande de limitation de courant et procédé de commande de limitation de courant Download PDF

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Publication number
WO2016045093A1
WO2016045093A1 PCT/CN2014/087566 CN2014087566W WO2016045093A1 WO 2016045093 A1 WO2016045093 A1 WO 2016045093A1 CN 2014087566 W CN2014087566 W CN 2014087566W WO 2016045093 A1 WO2016045093 A1 WO 2016045093A1
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Prior art keywords
circuit
current
value
current limiting
radio frequency
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PCT/CN2014/087566
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English (en)
Chinese (zh)
Inventor
田丰
郭智
董峰
杨帆
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华为技术有限公司
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Priority to PCT/CN2014/087566 priority Critical patent/WO2016045093A1/fr
Publication of WO2016045093A1 publication Critical patent/WO2016045093A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a wireless internet terminal, a current limiting control device, and a current limiting control method.
  • a PC personal computer
  • a wireless Internet terminal such as a notebook computer, a pad, a tablet computer, etc.
  • a USB wireless Internet terminal is plug and play, providing a convenient and fast wireless Internet access experience for the user.
  • the power supply of the wireless internet terminal is provided by the USB interface of the PC to provide a standard voltage of 5V. Since the design of USB power supply capability is different for each PC manufacturer, the maximum current value that can be supplied is different. If the current demand of the wireless Internet terminal exceeds the power supply capability of the PC connected to it in some usage scenarios, the PC may crash due to the inability to load, and the wireless Internet terminal cannot cooperate with it.
  • the prior art adds a current limiting protection to the circuit design of the wireless internet terminal, and sets the current limiting value of the wireless internet terminal through the current limiting chip or the power management chip.
  • the current of the wireless internet terminal does not exceed the current limit value, thereby protecting the normal operation of the PC.
  • the current limit value is preset and cannot be automatically adjusted according to the power supply capability of the PC.
  • the current limit setting of the wireless Internet terminal is greater than the power supply capability of the PC, since the current does not reach the demand of the wireless Internet terminal, the power supply voltage of the wireless Internet terminal may fall due to abnormal operation, or the USB output protection of the PC may be directly disconnected.
  • the terminal In the case of power supply; when the current limit value of the wireless internet terminal is less than the USB current limit value of the PC end or the upper limit of the output capability is not reached, the terminal cannot fully utilize the power that the PC can provide.
  • the wireless internet terminal in the prior art has a technical problem that the current limit value cannot be adjusted according to the power supply capability of the PC.
  • the embodiments of the present invention provide a wireless network access terminal, a current limiting control device, and a current limiting control method, to solve the technical problem that the current limiting value cannot be adjusted according to the power supply capability of the PC in the prior art.
  • an embodiment of the present invention provides a wireless internet terminal, including:
  • a current limiting control circuit for limiting the operating current of the wireless internet terminal
  • a detection circuit connected to the output end of the current limiting control circuit for detecting a voltage value at an output end of the current limiting control circuit
  • a DC voltage conversion circuit connected to the output end of the current limiting control circuit for converting and outputting a current voltage output by the current limiting control circuit
  • a radio frequency circuit connected to the output end of the DC voltage conversion circuit for transmitting and receiving signals when the wireless internet terminal is working normally;
  • a load circuit connected to an output end of the DC voltage conversion circuit for providing a load when the wireless network terminal is powered on; wherein a maximum load current value of the load circuit and a maximum operating current value of the RF circuit Similarly, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
  • the processor is connected to one end of the current limiting control circuit, the detecting circuit, the DC voltage converting circuit, the load circuit and the RF circuit, respectively, when the wireless internet terminal is powered on, Turning off the RF circuit, turning on the load circuit, and controlling the current of the current limiting control circuit to gradually increase from the initial current value by a preset step value, and sequentially obtaining the voltage value detected by the detecting circuit; When the obtained voltage value falls to a preset threshold value, obtaining a current value currently provided by the current limiting control circuit as a current limiting value, and limiting, by the current limiting control circuit, an operating current value of the wireless internet terminal Less than or equal to the current limit value.
  • the processor is further configured to:
  • the detecting circuit specifically includes:
  • At least two series resistors wherein one end of the first one of the at least two series resistors is connected to an output of the current limiting control circuit, the other end of the first resistor and the at least two series resistors One end of the second resistor is connected, the other end of the second resistor is grounded, and an analog-to-digital conversion interface of the processor is connected to one end of the second resistor, and the voltage value on the second resistor is The analog to digital conversion interface operates within a range of operating levels.
  • the preset threshold value is specifically 4.75v.
  • the initial current value is specifically a minimum current value of the wireless internet terminal when operating at a baseband .
  • the embodiment of the present invention provides a current limiting control method for a wireless internet terminal, where the wireless internet terminal includes a current limiting control circuit, a detecting circuit, and a radio frequency circuit, and the detecting circuit and the radio frequency circuit are both The outputs of the current limiting control circuit are connected, and the method includes:
  • a maximum load current value of the load circuit is the same as a maximum operating current value of the radio frequency circuit, or
  • the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
  • the method further includes:
  • the preset threshold value is specifically 4.75v.
  • an embodiment of the present invention provides a current limiting control device for a wireless internet terminal, where the wireless internet terminal includes a current limiting control circuit, a detecting circuit, and a radio frequency circuit, and the detecting circuit and the radio frequency circuit are both configured to limit current
  • the outputs of the control circuit are connected, and the device comprises:
  • a switch control unit configured to turn off the radio frequency circuit and turn on the load circuit when the wireless internet terminal is powered on; wherein a maximum load current value of the load circuit and a maximum operating current value of the radio frequency circuit Similarly, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
  • control unit configured to: when the wireless network terminal is powered on, when the current for controlling the current limiting control circuit is gradually increased from the initial current value by a preset step value, the detection circuit sequentially obtains The voltage value;
  • a current limiting value obtaining unit configured to obtain a current value currently provided by the current limiting control circuit as a current limiting value when the voltage value obtained by the control unit falls to a preset threshold value
  • the control unit is further configured to limit, by the current limiting control circuit, that an operating current value of the wireless internet terminal is less than or equal to the current limiting value.
  • the method further includes: a radio frequency power obtaining unit, configured to obtain the radio frequency after the current limiting value obtaining unit obtains the current value currently provided by the current limiting control circuit The maximum RF power of the circuit when operating in a current range less than or equal to the current limit value;
  • the switch control unit is further configured to turn off the load circuit, turn on the radio frequency circuit, and control the radio frequency circuit to transmit and receive signals according to a power that does not exceed the maximum radio frequency power.
  • the preset threshold is specifically 4.75v.
  • the processor By setting a detection circuit and a load circuit at the output end of the current limiting control circuit of the wireless internet terminal, when the wireless power terminal is powered on, the processor starts the load circuit to simulate the load of the wireless circuit of the wireless internet terminal, and gradually increases the current limiting control.
  • the current of the circuit corresponds to the voltage at the output of the current limiting control circuit to detect the power supply capability of the interface provided by the PC.
  • the voltage at the output of the current limiting control circuit falls to a preset threshold, the current corresponding to the current limiting control circuit is obtained.
  • the value is the current supply current of the currently connected PC as the current limit value of the current limiting control circuit, thereby solving the technical problem that the wireless internet terminal in the prior art cannot adjust the current limit value according to the power supply capability of the PC, and improves the wireless Internet access. Terminal utilization of power.
  • FIG. 1 is a schematic circuit diagram of a wireless internet terminal according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of a detection circuit according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic diagram of a load circuit according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic flowchart of a current limiting control method according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of a current limiting control apparatus according to Embodiment 3 of the present invention.
  • the embodiment of the present invention provides a wireless internet terminal, a current limiting control device, and a current limiting control method.
  • an embodiment of the present application provides a wireless internet terminal, including:
  • the current limiting control circuit 11 is configured to provide a working current for the wireless internet terminal and limit the working current of the wireless internet terminal;
  • the detecting circuit 12 is connected to the output end of the current limiting control circuit 11 for detecting the voltage value of the output end of the current limiting control circuit;
  • the DC voltage conversion circuit 13 is connected to the output end of the current limiting control circuit 11 for converting and outputting the current voltage output by the current limiting control circuit 11;
  • the RF circuit 14 is connected to the output end of the DC voltage conversion circuit 13 for transmitting and receiving signals when the wireless Internet terminal is working normally;
  • the load circuit 15 is connected to the output end of the DC voltage conversion circuit 13 for providing a load when the wireless network terminal is powered on; wherein the maximum load current value of the load circuit and the maximum operation of the RF circuit The current values are the same, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
  • the processor 16 is respectively connected to one ends of the current limiting control circuit 11, the detecting circuit 12, the DC voltage converting circuit 13, the load circuit 15, and the RF circuit 14 for use in the wireless Internet access
  • the RF circuit 14 is turned off, the load circuit 15 is turned on, and the current of the current limiting control circuit 11 is controlled to gradually increase from the initial current value according to the preset step value.
  • the voltage value detected by the detecting circuit 12 when the obtained voltage value falls to a preset threshold value, obtains a current value currently provided by the current limiting control circuit 11 as a current limiting value, and passes the current limiting
  • the control circuit 11 limits the operating current value of the wireless internet terminal to be less than or equal to the current limit value.
  • the wireless internet terminal provided by the embodiment of the present invention may specifically be a USB wireless internet terminal, and may be connected to a USB interface of the PC through a USB interface.
  • the USB interface of the PC end can generally provide a 5V constant voltage power supply to the wireless internet terminal within the range of its power supply capability.
  • one input of the current limiting control circuit 11 is connected to the processor 16, and the other input is wireless.
  • the USB interface of the Internet terminal is connected to connect with the USB of the PC, thereby limiting the working current of the wireless Internet terminal.
  • the current limiting control circuit 11 can be composed of a current limiting chip and a resistor array for limiting the working current of the wireless internet terminal, and avoiding that the working circuit of the wireless internet terminal is too large to exceed the power supply capability of the USB interface of the PC end and can not be loaded and crash.
  • the output of the current limiting control circuit 11 is connected to the input of the detecting circuit 12 and the input of the DC voltage converting circuit 13.
  • the detecting circuit 12 may include at least two series resistors, wherein one end of the first resistor of the at least two series resistors is connected to an output end of the current limiting control circuit 11, and the first resistor is further One end is connected to one end of the second one of the at least two series resistors, the other end of the second resistor is grounded, and an analog-to-digital conversion interface of the processor 16 is connected to one end of the second resistor, The voltage value divided on the second resistor is within the operating level range of the analog to digital conversion interface.
  • FIG. 2 is a detection circuit 12 including two resistors.
  • the first resistor 121 is connected in series with the second resistor 122.
  • One end 121a of the first resistor 121 is connected to the output end of the current limiting control circuit 11, the other end 122b of the second resistor 122 is grounded, and the one end 122a of the second resistor 122 is also connected to the processor.
  • the analog-to-digital conversion interface of 16 is connected, that is, the detection circuit 12 can be a voltage dividing circuit.
  • the working level range of the analog-to-digital conversion interface of the processor 16 may be lower than the voltage of the output terminal of the current limiting control circuit 11, so the voltage of the voltage detecting signal input to the analog-to-digital conversion interface by the voltage dividing circuit is used. Control is within the operating level range of the analog to digital conversion interface.
  • the detection circuit 12 can be equal to two resistance values.
  • the resistors are connected in series such that the voltage of one end 122a of the second resistor 122 is 2.25v to 2.48v, which is in accordance with the operation requirements of the analog-to-digital conversion interface of the processor 16.
  • the processor 16 can obtain the voltage of the output terminal of the current limiting control circuit 11 by Ohm's law calculation according to the voltage at the output of the detecting circuit 12. For example, if the voltage of the second resistor 122 in FIG. 2 is 2.4 volts, the voltage at the output of the current limiting control circuit 11 obtained by Ohm's law calculation is 4.8 volts.
  • the DC voltage conversion circuit 13 can specifically be a chip DC/DC (direct current to direct Current, DC voltage to DC voltage), used to convert the DC voltage provided at the output of the current limiting control circuit 11 into a DC voltage suitable for the operation of the RF circuit of the wireless Internet terminal, such as converting a fixed DC piezoelectric to a variable DC voltage.
  • DC/DC direct current to direct Current, DC voltage to DC voltage
  • the output of the DC voltage conversion circuit 13 is connected to the input of the RF circuit 14 and the input of the load circuit 15.
  • the load circuit 15 can be a fixed current load with a large current flow, such as a resistor with a large resistance value, wherein the maximum load current value of the load circuit 15 is the same as the maximum operating current value of the RF circuit, and is used to simulate the operation of the RF circuit 14. .
  • the load circuit 15 can also be a dynamic current load, simulating the dynamic power consumption of the RF circuit 14 operating timing. At this time, the impedance value of the load circuit 15 is the same as the impedance value of the RF circuit 14. The impedance value of the RF circuit 14 dynamically changes with the RF operation timing.
  • the impedance value of the load circuit 15 also dynamically changes according to the same timing, and the analog RF circuit 14 operates more accurately.
  • the embodiment of the present application provides a load instead of the radio frequency circuit 14 when the load circuit 15 is powered on, so that the changed current affects the stability of the operation of the radio frequency circuit 14 during the power-on detection.
  • FIG. 3 is an example of a circuit when the load circuit 15 is a dynamic current load.
  • the load circuit 15 includes n parallel resistors, n is an integer greater than or equal to 2, one end of each resistor is connected to the output end of the DC voltage conversion circuit 13, and the other end is grounded through a switch, and the control terminal of each switch and the processor 16 A GPIO (general purpose input output) interface is connected, and the processor 16 can control the on/off of the switch through the GPIO interface, thereby changing the load value of the load circuit and simulating the impedance value of the RF circuit 14.
  • GPIO general purpose input output
  • the processor 16 is connected to the input of the load circuit 15, the input of the RF circuit 14, the output of the detection circuit 12 (i.e., the end 122a of the second resistor) and the input of the current limiting control circuit 11, respectively.
  • the digital-to-analog conversion interface of the processor 16 is connected to the control end of the current limiting control circuit 11, and the processor 16 can output a current-limit value control signal through the digital-to-analog conversion interface to control the current limiting value of the current limiting control circuit 11.
  • the wireless internet terminal includes two working states: a power-on detection state and a normal working state.
  • the processor 16 performs the following steps:
  • Step 1 Turn off the RF circuit 14, turn on the load circuit 15, and start the baseband operation.
  • the baseband is a circuit other than the RF circuit 14 of the wireless Internet terminal.
  • Step 2 The processor 16 controls the current of the current limiting control circuit 11 to gradually increase from the initial current value by a preset step value by the current limit value control signal to detect the power supply capability of the PC end.
  • the initial current value may be the minimum current value of the wireless internet terminal when working at the baseband to ensure normal operation of the baseband.
  • Step 3 When the current of the control signal control current limiting control circuit 11 is gradually increased from the initial current value by the preset step value, the processor 16 sequentially obtains the voltage value detected by the detecting circuit 12.
  • the current of the current limiting control circuit 11 When the current of the current limiting control circuit 11 is gradually increased, the power consumption of the wireless internet terminal is gradually increased, and the power supply capability of the PC terminal is also higher and higher.
  • the power consumption of the wireless internet terminal exceeds the power supply capability of the PC, the current limiting A large voltage drop is generated at the output of the control circuit 11, and step 4 is continued for this purpose.
  • Step 4 When the voltage value detected by the detecting circuit 12 (ie, the voltage value at the output end of the current limiting control circuit 11) falls to a preset threshold value, the current value currently provided by the current limiting control circuit 11 is obtained as a time limit flow control circuit.
  • the current limiting value of 11 is limited, and the current limiting value of the wireless internet terminal is limited by the current limiting control circuit 11 to be less than or equal to the current limiting value.
  • the processor 16 can measure the data multiple times and perform an algorithmic processing to obtain a more accurate voltage value at the output of the current limiting control circuit 11.
  • the processor 16 may specifically output a current limit value control signal through the digital-to-analog conversion interface to control the current limit value of the current limiting control circuit 11.
  • the preset threshold may be specifically 4.75v.
  • the current currently provided by the current limiting control circuit 11 ie, the current of the wireless internet terminal
  • the current limiting control circuit 11 is set as the current limiting value of the current limiting control circuit 11, so that the current limiting value of the wireless internet terminal is not limited by the current limiting control circuit 11 to exceed the current limiting value.
  • the current limit value is adjusted according to the maximum power supply capacity of the PC, and the wireless network terminal in the prior art cannot adjust the current limit value according to the power supply capability of the PC.
  • the technical problem has improved the utilization of the power supply by the wireless internet terminal. Therefore, the wireless internet terminal provided by the embodiment of the present application can be applied to different power supply capabilities. On the PC side, ensure that the wireless Internet terminal can work with more PCs.
  • the wireless network terminal After the power-on detection is completed, the wireless network terminal obtains the current limit value of the adapted PC, turns off the load circuit 15, turns on the RF circuit 14, and enters a normal working state. Further, after obtaining the current value currently provided by the current limiting control circuit, the processor 16 may obtain the maximum RF power when the radio frequency circuit 14 operates in a current range less than or equal to the current limiting value; The load circuit 15 turns on the radio frequency circuit 14 and controls the radio frequency circuit 14 to transmit and receive signals according to the power of the maximum radio frequency, so that the current demand of the wireless internet terminal is matched with the power supply capability of the PC, and the wireless internet terminal is operated. Best performance.
  • the embodiment of the present application provides a current limiting control method, which is applied to the wireless Internet access terminal, where the wireless Internet access terminal includes a current limiting control circuit, a detection circuit, and a radio frequency. a circuit, the detection circuit and the radio frequency circuit are both connected to an output of the current limiting control circuit, the method comprising:
  • Step 401 Turn off the radio frequency circuit to turn on the load circuit when the wireless internet terminal is powered on, wherein a maximum load current value of the load circuit is the same as a maximum operating current value of the radio frequency circuit, or The impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
  • Step 402 When the current of the current limiting control circuit is gradually increased from the initial current value according to the preset step value, the voltage value of the output end of the current limiting control circuit detected by the detecting circuit is sequentially obtained;
  • Step 403 When the obtained voltage value falls to a preset threshold, obtaining a current value currently provided by the current limiting control circuit as a current limiting value;
  • Step 404 Limit, by the current limiting control circuit, that an operating current value of the wireless internet terminal is less than or equal to the current limiting value.
  • the method further includes:
  • the preset threshold of the wireless internet terminal may specifically be 4.75v.
  • the wireless network terminal includes a current limiting control circuit, a detection circuit, and a radio frequency circuit, and the detection circuit and the radio frequency circuit are both connected to an output end of the current limiting control circuit, and the current limiting control device includes:
  • the switch control unit 51 is configured to: when the wireless internet terminal is powered on, turn off the radio frequency circuit, and turn on the load circuit; wherein a maximum load current value of the load circuit and a maximum operating current of the radio frequency circuit The values are the same, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
  • control unit 52 configured to control, when the current of the current limiting control circuit is gradually increased from the initial current value by a preset step value, sequentially obtaining the voltage value of the output end of the current limiting control circuit detected by the detecting circuit ;
  • the current limit value obtaining unit 53 is configured to obtain, as the current limit value, a current value currently provided by the current limiting control circuit when the voltage value obtained by the control unit falls to a preset threshold value;
  • the control unit 52 is further configured to limit, by the current limiting control circuit, that an operating current value of the wireless internet terminal is less than or equal to the current limiting value.
  • the current limiting control apparatus provided by the embodiment of the present application further includes a radio frequency power obtaining unit, configured to obtain the current value after the current limiting value obtaining unit obtains the current value currently provided by the current limiting control circuit.
  • a radio frequency power obtaining unit configured to obtain the current value after the current limiting value obtaining unit obtains the current value currently provided by the current limiting control circuit.
  • the switch control unit 51 is further configured to turn off the load circuit, turn on the radio frequency circuit, and control the radio frequency circuit to transmit and receive signals according to the maximum radio frequency.
  • the preset threshold of the wireless internet terminal may specifically be 4.75v.
  • the processor By setting a detection circuit and a load circuit at the output end of the current limiting control circuit of the wireless internet terminal, when the wireless power terminal is powered on, the processor starts the load circuit to simulate the load of the wireless circuit of the wireless internet terminal, and gradually increases the current limiting control.
  • the current of the circuit corresponds to the voltage at the output of the current limiting control circuit to detect the power supply capability of the interface provided by the PC.
  • the voltage at the output of the current limiting control circuit falls to a preset threshold, the current corresponding to the current limiting control circuit is obtained.
  • the value is the current supply current of the currently connected PC as the current limit value of the current limiting control circuit, thereby solving the technical problem that the wireless internet terminal in the prior art cannot adjust the current limit value according to the power supply capability of the PC, and improves the wireless Internet access. Terminal utilization of power.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Abstract

La présente invention concerne un terminal d'accès à Internet sans fil, un appareil de commande de limitation de courant et un procédé de commande de limitation de courant. Le terminal d'accès à Internet sans fil comprend un circuit de commande de limitation de courant, un circuit de détection, un circuit de conversion de tension à courant continu, un circuit de fréquence radio, un circuit de charge et un processeur ; une valeur de courant de charge maximum du circuit de charge est identique à une valeur de courant de fonctionnement maximum du circuit de fréquence radio, ou une valeur de résistance du circuit de charge est identique à une valeur de résistance du circuit de fréquence radio ; le processeur sert à fermer le circuit de fréquence radio et à ouvrir le circuit de charge lorsque le terminal d'accès à Internet sans fil est mis sous tension afin d'être détecté, à commander le courant du circuit de commande de limitation de courant de manière à ce qu'il augmente progressivement d'une valeur de courant initiale conformément à une valeur d'étape prédéfinie, et à obtenir de manière séquentielle une valeur de tension détectée par le circuit de détection ; et lorsque la valeur de tension obtenue est réduite à une valeur seuil prédéfinie, la valeur de courant actuellement fournie par le circuit de commande de limitation de courant est utilisée en tant que valeur de limitation de courant. Au moyen de la solution technique, le problème technique dans l'état de la technique selon lequel le terminal d'accès à Internet sans fil ne peut pas régler la valeur de limitation du courant en fonction de la capacité d'alimentation d'un PC est résolu.
PCT/CN2014/087566 2014-09-26 2014-09-26 Terminal d'accès à internet sans fil, appareil de commande de limitation de courant et procédé de commande de limitation de courant WO2016045093A1 (fr)

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CN107042804A (zh) * 2017-05-04 2017-08-15 山东省科学院自动化研究所 一种抛负载脉冲防护装置
CN107042804B (zh) * 2017-05-04 2023-05-26 山东省科学院自动化研究所 一种抛负载脉冲防护装置
CN117412265A (zh) * 2023-10-18 2024-01-16 广州通则康威科技股份有限公司 一种tdd制式lte-r数据终端的功率线性控制方法及装置
CN117412265B (zh) * 2023-10-18 2024-03-29 广州通则康威科技股份有限公司 一种lte-r数据终端的功率线性控制方法及装置

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