A power consumption adaptive circuit and method for microSD type wireless access equipment
A wireless access device, self-adaptive adjustment technology, applied in wireless communication, power management, electrical components and other directions, can solve the problem of reducing the transmission power of the network card, the network card cannot work normally, reducing the wireless working distance of the wireless LAN card, etc. Powerful effect
Inactive Publication Date: 2016-01-20
LZEAL INFORMATION TECH +1
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Problems solved by technology
[0006] Under different transmission power conditions, the maximum working current of the wireless LAN card is between tens of mA and hundreds of mA. When the wireless LAN card exceeds the load capacity of the mobile phone, it will directly cause the network card to fail to work normally.
In order to improve the applicability of the wireless LAN card and its compatibility with various mobile phone models, one method is to reduce the transmission power of the network card and reduce the maximum operating current of the card to below 200mA. However, this method will directly reduce the wireless LAN card. Wireless working distance
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[0020] The microSD type wireless access device of the present invention is a wireless network card with the same size and specification as the standard microSD card. The device can be loaded and removed from the microSD card slot in a handheld mobile terminal (such as a mobile phone), and can independently access the wireless network, and can exchange data and commands with the handheld device through the SDIO interface.
[0021] figure 1 It is a schematic structural diagram of a microSD wireless access device and a handheld mobile terminal thereof according to an embodiment of the present invention. figure 1 The handheld mobile terminal 110 includes a mobile phone SD interface 111 and a mobile phone power supply circuit 112 , and the microSD wireless access device 120 includes a sampling circuit 121 , a main control circuit 122 and a radio frequency circuit 123 .
[0022] The mobile phone SD interface 111 is a common SDIO interface, through which the handheld mobile terminal...
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The invention relates to a wireless local area network, in particular to a power consumption adaptive circuit and method for microSD (micro Secure Digital) wireless access equipment. The power consumption adaptive circuit comprises a sampling circuit and a master control circuit, wherein the sampling circuit is used for sampling interface voltage of a terminal to which the microSD wireless access equipment belongs in real time and transmitting the sampled voltage to the master control circuit. The level of transmitted power of the microSD wireless access equipment is adaptively adjusted by the master control circuit according to a variation situation of the sampled voltage, so that the transmitted power of the microSD wireless access equipment is the maximum under the condition that working current of the wireless access equipment is less than load current of the terminal to which the wireless access equipment belongs. The circuit and the method disclosed by the invention are suitable for all pieces of terminal equipment requiring the wireless local area network and SDIO (Secure Digital Input Output) card slots.
Description
technical field [0001] The present invention relates to wireless access equipment, in particular to the field of power consumption of wireless access equipment. Background technique [0002] The microSD card is a very small flash memory card, its volume is 15mmx11mmx1mm, which is the smallest memory card currently. The microSD card format was created by SanDisk and is supported by most current mobile phones. [0003] The mircoSD card is widely used in mobile phone terminals as an auxiliary storage device for mobile phones. The design of its working current refers to the SD interface standard. The average current is generally 20mA (mA) to 30mA, and the maximum current does not exceed 200mA. [0004] The load capacity of the SD interface of the mobile phone terminal is usually between 200mA and 300mA, and individual models exceed 300mA. Since the maximum current of the microSD card does not exceed 200mA, the working current of the microSD card does not exceed the load capaci...
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IPC IPC(8): H04W52/04H04W88/02
Inventor 王峥张溯许操梁上泉
Owner LZEAL INFORMATION TECH