Method and device for filtering out interference frequency points of mobile terminal
A mobile terminal and interference frequency technology, applied in the electronic field, can solve the problems of mobile phone interference, more and more mobile phone interference, and affecting the wireless performance of mobile phones, so as to save PCB board layout space and filter out interference signals.
Active Publication Date: 2018-07-06
XIAOMI INC
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Problems solved by technology
[0002] As mobile phones have more and more frequency bands, and more and more antennas are needed, such as 2G / 3G / 4G and wifi, and the environment used by mobile phones is becoming more and more complex, and the interference on mobile phones is also increasing. Many, for example, charging a mobile phone through a USB data cable, or editing on a notebook through a USB cable, because the inherent interference of the USB charger or the notebook itself will interfere with the mobile phone, thereby affecting the wireless performance of the mobile phone
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[0043] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.
[0044] Figure 1A is a flow chart of a method for filtering out interference frequency points of a mobile terminal according to an exemplary embodiment, Figure 1B It is a circuit diagram of a USB data line and a notch network shown according to an exemplary embodiment; the method of filtering out interference frequency points of a mobile terminal can be applied to a mobile terminal, such as Fi...
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The disclosure relates to a method and device for filtering out interference frequency points of a mobile terminal, which are used to filter out interference signals from a USB line to a mobile device. The method includes: determining the signal strength of the interference signal from the USB data line and the first center frequency point of the interference signal; adjusting the signal located in the USB data line according to the signal strength and the first center frequency point The capacitance value of the variable capacitor of the notch network; adjust the second center frequency point of the notch network according to the adjusted capacitance, so that the first center frequency point is the same as the second center frequency point. The disclosed technical solution can save the layout space of the PCB board on the mobile terminal, and effectively filter out the interference signal generated by the USB charger or the notebook to the mobile terminal.
Description
technical field [0001] The present disclosure relates to the field of electronic technology, and in particular to a method and device for filtering out interference frequency points of a mobile terminal. Background technique [0002] As mobile phones have more and more frequency bands, and more and more antennas are needed, such as 2G / 3G / 4G and wifi, and the environment used by mobile phones is becoming more and more complex, and the interference on mobile phones is also increasing. Many, for example, charging a mobile phone through a USB data cable, or editing on a notebook through a USB cable, the inherent interference of the USB charger or the notebook itself will interfere with the mobile phone, thereby affecting the wireless performance of the mobile phone. Contents of the invention [0003] In order to overcome the problems existing in the related technologies, embodiments of the present disclosure provide a method and device for filtering out interference frequency ...
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IPC IPC(8): H04M1/24H04K3/00
Inventor 曾超张良飞刘志伟
Owner XIAOMI INC