Wireless network adapter over current protection method and device
A wireless network card and overcurrent protection technology, applied in emergency protection circuit devices, emergency protection devices with automatic disconnection, circuit devices, etc., can solve problems such as high device cost, damage to computers, and complicated overcurrent protection methods, and achieve Simple, structured effect
Inactive Publication Date: 2008-02-20
ZTE CORP
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Problems solved by technology
[0005] In view of this, the main purpose of the present invention is to provide a method and device for overcurrent protection of a wireless network card, which can solve the problem that the wireless network card in the prior art is prone to excessive current damage to the computer, or the overcurrent protection method is complicated and the device cost high problem
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[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0023] As shown in FIG. 1, the wireless network card overcurrent protection device of the present invention includes a power supply enabling unit 101, a level shifting unit 102, an enabling level shifting unit 103, a PM 104, and a current acquisition unit 105, wherein,
[0024] The power supply enabling unit 101 is configured to turn on and off the power supply circuit according to the enable signal sent by the PM104 or the enable level conversion unit 103;
[0025] The level conversion unit 102 is used to complete the conversion between the computer output level and the wireless network card input level when the power supply enabling unit 101 turns on the power supply circuit, if the computer output level is equal to the required wireless network card input level , for example, both are 5V, then this unit can be omitted;
[0026] En...
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The utility model relates to an overcurrent protection method and an overcurrent protection unit for a wireless network card; wherein, the method is characterized in comprising the following steps: a power management unit of the wireless network card monitors whether the wireless network card is connected with a computer, and executes a power supply step and a monitoring step if the wireless network card is connected with the computer, otherwise continues monitoring; the power management unit of the wireless network card controls the break-over of the feed circuit, supplies power for the wireless network card, and monitors current of the supply; the utility model judges whether the supply current is grater than the rated threshold value or not, and the feed circuit stops supplying power for the wireless network card controlled by the power management unit of the wireless network card if the supply current is grater than the rated threshold value, otherwise continues supplying power and monitoring the current of the supply. The overcurrent protection method for a wireless network card can effectively make use of the charging management function of the power management unit of the wireless network card, and realize the goal of overcurrent protection of the wireless network card; in addition, the utility has the advantages of convenience, swiftness and easy realization.
Description
technical field [0001] The invention relates to overcurrent protection technology, in particular to a method and device for overcurrent protection of a wireless network card. Background technique [0002] With the development of wireless network technology, wireless network is more and more adopted by people due to its advantages of convenience and speed. Among them, wireless network card, as a wireless network access device of computer system, has also been widely used. In the case of weak signals, the wireless network card will increase the transmission power of its radio frequency unit in order to ensure the communication quality, resulting in a large working current of the wireless network card, even greater than the output current provided by the computer. In this case, it will cause the computer to Display blue screen error or reset and restart, and even damage the computer, so it is very necessary to adopt overcurrent protection measures for the wireless network card....
Claims
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Login to View More IPC IPC(8): H04L12/02H02H7/20H02H3/26
Inventor 李启瑞郑国敏姜宁波左向民时慧钦
Owner ZTE CORP