CN104902054B - Filter out the method and device of the interference frequency point of mobile terminal - Google Patents
Filter out the method and device of the interference frequency point of mobile terminal Download PDFInfo
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- CN104902054B CN104902054B CN201510353289.XA CN201510353289A CN104902054B CN 104902054 B CN104902054 B CN 104902054B CN 201510353289 A CN201510353289 A CN 201510353289A CN 104902054 B CN104902054 B CN 104902054B
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Abstract
The disclosure is directed to a kind of method and device of interference frequency point for filtering out mobile terminal, to filter out interference signal of the USB line to mobile equipment.The method includes：Determine the signal strength of the interference signal from USB data line and the first center frequency point of the interference signal；It is located at the capacitance of the variable capacitance of the wave invigorating network in the USB data line according to the signal strength and first center frequency point adjustment；The second center frequency point of the wave invigorating network is adjusted according to the capacitance after adjustment, makes first center frequency point identical with second center frequency point.Disclosed technique scheme can save the pcb board arrangement space on mobile terminal, effectively filter out the interference signal that USB charger or notebook generate mobile terminal.
Description
Technical field
This disclosure relates to electronic technology field more particularly to a kind of method and dress of interference frequency point for filtering out mobile terminal
It puts.
Background technology
The more do the more more with the frequency range of mobile phone, and need antenna it is also more and more, antenna for example have 2G/3G/4G and
Wifi and mobile phone institute's use environment become increasingly complex, and the interference that mobile phone is subject to is also more and more, for example, mobile phone passes through USB
Data line charging either by USB line the enterprising edlin of notebook due to USB charger or notebook inherently
Interference can form mobile phone and interfere, and then influence the wireless performance of mobile phone.
Invention content
To overcome the problems in correlation technique, the embodiment of the present disclosure provides a kind of interference frequency point for filtering out mobile terminal
Method and device, to filter out interference signal of the USB line to mobile equipment.
According to the embodiment of the present disclosure in a first aspect, provide it is a kind of filter out mobile terminal interference frequency point method, including：
Determine the signal strength of the interference signal from USB data line and the first center frequency point of the interference signal；
It is located at the wave invigorating network in the USB data line according to the signal strength and first center frequency point adjustment
The capacitance of variable capacitance；
The second center frequency point of the wave invigorating network is adjusted according to the capacitance after adjustment, makes the first center frequency
Point is identical with second center frequency point.
In one embodiment, the signal strength for determining the interference signal from USB data line and the interference signal
The first center frequency point, it may include：
Receive the interference signal of the data port from USB data line；
The first center of the signal strength and the interference signal in the interference signal is detected by frequency spectrum detection circuit
Frequency point.
In one embodiment, it is described that the USB numbers are located at according to the signal strength and first center frequency point adjustment
According to the capacitance of the variable capacitance of the wave invigorating network in line, it may include：
Wave invigorating network in the USB data line is determined according to the signal strength and first center frequency point
The capacitance of the needs of variable capacitance；
The capacitance of variable capacitance in the wave invigorating network is adjusted to the capacitance of the needs.
In one embodiment, the wave invigorating network can be passive twin-T network, and second center frequency point is F=1/2
π (R*C), wherein, R is the resistance value of the resistance in the wave invigorating network, and C is the capacitance of the variable capacitance in the wave invigorating network
Value, π is constant.
According to the second aspect of the embodiment of the present disclosure, a kind of device of interference frequency point for filtering out mobile terminal is provided, including：
First determining module is configured to determine that the signal strength of the interference signal from USB data line and the interference
First center frequency point of signal；
The first adjustment module is configured as the signal strength determined according to first determining module and described first
Center frequency point adjustment is located at the capacitance of the variable capacitance of the wave invigorating network in the USB data line；
It is described sunken to be configured as the capacitance adjustment after being adjusted according to the first adjustment module for second adjustment module
Second center frequency point of wave network makes first center frequency point identical with second center frequency point.
In one embodiment, first determining module may include：
Receiving submodule is configured as receiving the interference signal of the data port from USB data line；
Detection sub-module is configured as the interference for detecting the receiving submodule by frequency spectrum detection circuit and receiving
First center frequency point of signal strength and the interference signal in signal.
In one embodiment, the first adjustment module may include：
Determination sub-module is configured as determining the wave invigorating network according to the signal strength and first center frequency point
Variable capacitance needs capacitance；
Submodule is adjusted, is configured as adjusting the capacitance of the variable capacitance in the wave invigorating network to the determining son
The capacitance of the needs that module determines.
In one embodiment, the wave invigorating network can be passive twin-T network, and second center frequency point is F=1/2
π (R*C), wherein, R is the resistance value of the resistance in the wave invigorating network, and C is the capacitance of the variable capacitance in the wave invigorating network
Value, π is constant.
According to the third aspect of the embodiment of the present disclosure, a kind of device of interference frequency point for filtering out mobile terminal is provided, including：
Processor；
For storing the memory of processor-executable instruction；
Wherein, the processor is configured as：
Determine the signal strength of the interference signal from USB data line and the first center frequency point of the interference signal；
It is located at the wave invigorating network in the USB data line according to the signal strength and first center frequency point adjustment
The capacitance of variable capacitance；
The second center frequency point of the wave invigorating network is adjusted according to the capacitance after adjustment, makes the first center frequency
Point is identical with second center frequency point.
The technical scheme provided by this disclosed embodiment can include the following benefits：Since wave invigorating network is arranged on
In USB data line, so as to save the pcb board arrangement space on mobile terminal；It is real by adjusting the variable capacitance in wave invigorating network
The second center frequency point of wave invigorating network is now adjusted, has effective filtered out what USB charger or notebook generated mobile terminal
Interference signal.
It should be understood that above general description and following detailed description are only exemplary and explanatory, not
The disclosure can be limited.
Description of the drawings
Attached drawing herein is incorporated into specification and forms the part of this specification, shows the implementation for meeting the present invention
Example, and be used to explain the principle of the present invention together with specification.
Figure 1A is the flow chart according to the method for the interference frequency point for filtering out mobile terminal shown in an exemplary embodiment.
Figure 1B is according to the USB data line and the circuit diagram of wave invigorating network shown in an exemplary embodiment.
Fig. 1 C are according to the USB data line and the circuit diagram of wave invigorating network shown in an exemplary embodiment one.
Fig. 2 is the flow chart according to the method for the interference frequency point for filtering out mobile terminal shown in an exemplary embodiment one.
Fig. 3 is according to a kind of block diagram of the device of interference frequency point for filtering out mobile terminal shown in an exemplary embodiment.
Fig. 4 is the frame of the device for the interference frequency point that mobile terminal is filtered out according to the another kind shown in an exemplary embodiment
Figure.
Fig. 5 is the device according to a kind of interference frequency point for being suitable for filtering out mobile terminal shown in an exemplary embodiment
Block diagram.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, example is illustrated in the accompanying drawings.Following description is related to
During attached drawing, unless otherwise indicated, the same numbers in different attached drawings represent the same or similar element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects being described in detail in claims, of the invention.
Figure 1A is according to the flow chart of the method for the interference frequency point for filtering out mobile terminal shown in an exemplary embodiment, figure
1B is according to the USB data line and the circuit diagram of wave invigorating network shown in an exemplary embodiment；This filters out the interference of mobile terminal
Frequency point can be applied on mobile terminals, and as shown in Figure 1A, which includes following
Step S101-S 103：
In step S101, determine in the signal strength of the interference signal from USB data line and the first of interference signal
Heart frequency point.
In one embodiment, the signal strength of the interference signal of USB data line can be detected by frequency spectrum detection circuit
With the first center frequency point F1 of interference signal.
In step s 102, the wave invigorating network being located at according to signal strength and the adjustment of the first center frequency point in USB data line
Variable capacitance capacitance.
In one embodiment, can the required capacitance of wave invigorating network be pushed away come counter according to F1=1/2 π (R*C), for example,
In the case of resistance value R is certain, the first center frequency point F1 is by above-mentioned steps S101 it has been determined that therefore passing through F1=1/2 π
(R*C) it can determine the capacitance in wave invigorating network.
In step s 103, according to the second center frequency point of the capacitance adjustment wave invigorating network after adjustment, make the first center
Frequency point is identical with the second center frequency point.
As shown in Figure 1B, after mobile terminal 10 is connect by USB data line 11 with notebook or USB connector 12,
Frequency spectrum detection circuit 13 identifies the signal strength and the first center frequency point of the interference signal from USB data line 11；Frequency spectrum detection
Signal strength and the first center frequency point are fed back to the control module 14 of variable capacitance, the control module 14 of variable capacitance by circuit 13
Control the capacitance of the variable capacitance in the wave invigorating network 15 in USB data line 11 again according to signal strength and the first center frequency point
Value so as to play the function of the second center frequency point of adjustment wave invigorating network, filters out the multigroup interference generated in USB data line in real time
Clutter.
As shown in Figure 1 C, the series signals of wave invigorating network 15 are connected into the D+/D- ports of USB data line, and USB data line can
The interference frequency point filtered out is the second center frequency point of wave invigorating network 15, the second center frequency point and the resistance value and electricity in wave invigorating network
The calculation formula of capacitance is：F2=1/2 π (R*C)；In one embodiment, wave invigorating network 15 is R/C wave invigorating networks, passes through change
The value of series and parallel resistance capacitance, so as to achieve the effect that adjust the second center frequency point of wave invigorating network 15, and then filter out second
The interference signal in spectral range where center frequency point.
In the present embodiment, since wave invigorating network is arranged in USB data line, so as to save the pcb board cloth on mobile terminal
Office space；The second center frequency point for adjusting wave invigorating network is realized by adjusting the variable capacitance in wave invigorating network, is effective filtered out
The interference signal that USB charger or notebook generate mobile terminal.
In one embodiment, it determines in the signal strength of the interference signal from USB data line and the first of interference signal
Heart frequency point, it may include：
Receive the interference signal of the data port from USB data line；
The first center frequency point of the signal strength and interference signal in interference signal is detected by frequency spectrum detection circuit.
In one embodiment, the wave invigorating network being located at according to signal strength and the adjustment of the first center frequency point in USB data line
Variable capacitance capacitance, it may include：
The need of the variable capacitance for the wave invigorating network being located in USB data line are determined according to signal strength and the first center frequency point
The capacitance wanted；
The capacitance of variable capacitance in wave invigorating network is adjusted to the capacitance of needs.
In one embodiment, wave invigorating network can be passive twin-T network, and the second center frequency point is F=1/2 π (R*C),
Wherein, R is the resistance value of the resistance in wave invigorating network, and C is the capacitance of the variable capacitance in wave invigorating network, and π is constant.
The specific interference frequency point for how filtering out mobile terminal, please refer to subsequent embodiment.
So far, the above method that the embodiment of the present disclosure provides, can save the pcb board arrangement space on mobile terminal, have
Effect filters out the interference signal that USB charger or notebook generate mobile terminal.
The technical solution of embodiment of the present disclosure offer is provided below with specific embodiment.
Fig. 2 is the flow chart according to the method for the interference frequency point for filtering out mobile terminal shown in an exemplary embodiment one；
The present embodiment utilize the embodiment of the present disclosure provide the above method, for how adjusting the second center frequency point and combine Figure 1B into
Row exemplary illustration, as shown in Fig. 2, including the following steps：
In step s 201, the interference signal of the data port from USB data line is received.
In one embodiment, interference signal can be that mobile terminal is idiophrenic intrinsic by USB charger or electricity
Interfere the interference signal to mobile terminal formed.
In step S202, pass through the signal strength and the first of interference signal in frequency spectrum detection circuit detection interference signal
Center frequency point.
In one embodiment, frequency spectrum detection circuit may refer to the frequency spectrum detection circuit in the relevant technologies, and the disclosure is herein
No longer it is described in detail.
In step S203, the wave invigorating network in USB data line is determined according to signal strength and the first center frequency point
Variable capacitance capacitance.
The description of step S203 may refer to the description of above-mentioned steps S102, and this will not be detailed here.
In step S204, the capacitance in wave invigorating network is adjusted to capacitance.
In step S205, according to the second center frequency point of the capacitance adjustment wave invigorating network after adjustment, make the first center
Frequency point is identical with the second center frequency point.
As shown in Figure 1B, after mobile terminal 10 is connect by USB data line 11 with notebook or USB connector 12,
Frequency spectrum detection circuit 13 identifies the signal strength and the first center frequency point of the interference signal from USB data line 11；Frequency spectrum detection
Signal strength and the first center frequency point are fed back to the control module 14 of variable capacitance, the control module 14 of variable capacitance by circuit 13
The variable capacitance in the wave invigorating network 15 in USB data line 11 is controlled again according to signal strength and the first center frequency point, so as to rise
To the function of the second center frequency point of adjustment wave invigorating network, the clutter of multigroup interference generated in USB data line is filtered out in real time.
The signal strength and that the present embodiment is detected on the basis of with above-described embodiment by frequency spectrum detection circuit
The capacitance of the variable capacitance of wave invigorating network in one center frequency point control USB data line, realizes the of adjustment wave invigorating network
Two center frequency points are capable of the center frequency point of specific aim filtering interference signals.
Fig. 3 is a kind of block diagram of the device for the interference frequency point that mobile terminal is filtered out according to shown in an exemplary embodiment,
As shown in figure 3, the device for filtering out the interference frequency point of mobile terminal includes：
First determining module 31, the signal strength and interference for being configured to determine that the interference signal from USB data line are believed
Number the first center frequency point；
The first adjustment module 32 is configured as the signal strength and the first center frequency point that are determined according to the first determining module 31
Adjustment is located at the capacitance of the wave invigorating network in USB data line；
Second adjustment module 33 is configured as the of the capacitance adjustment wave invigorating network after being adjusted according to the first adjustment module 32
Two center frequency points filter out, and make the first center frequency point identical with the second center frequency point.
Fig. 4 is the frame of the device for the interference frequency point that mobile terminal is filtered out according to the another kind shown in an exemplary embodiment
Figure, as shown in figure 4, on the basis of above-mentioned embodiment illustrated in fig. 3, in one embodiment, the first determining module 31 may include：
Receiving submodule 311 is configured as receiving the interference signal of the data port from USB data line；
Detection sub-module 312 is configured as the interference letter for detecting receiving submodule 311 by frequency spectrum detection circuit and receiving
First center frequency point of signal strength and interference signal in number.
In one embodiment, the first adjustment module 32 may include：
Determination sub-module 321 is configured as determining the capacitance of wave invigorating network according to signal strength and the first center frequency point；
Submodule 322 is adjusted, is configured as adjusting the capacitance in wave invigorating network into the capacitance determined to determination sub-module 321
Value.
In one embodiment, wave invigorating network can be passive twin-T network, and the second center frequency point is F=1/2 π (R*C),
Wherein, R is the resistance in wave invigorating network, and C is the capacitance value in wave invigorating network, and π is constant.
About the device in above-described embodiment, wherein modules perform the concrete mode of operation in related this method
Embodiment in be described in detail, explanation will be not set forth in detail herein.
Fig. 5 is according to a kind of block diagram suitable for mobile terminal defense device shown in an exemplary embodiment.For example, dress
It can be mobile phone to put 500, computer, digital broadcast terminal, messaging devices, game console, tablet device, medical treatment
Equipment, body-building equipment, personal digital assistant etc..
With reference to Fig. 5, device 500 can include following one or more components：Processing component 502, memory 504, power supply
Component 506, multimedia component 508, audio component 510, the interface 512 of input/output (I/O), sensor module 514 and
Communication component 516.
The integrated operation of 502 usual control device 500 of processing component, such as with display, call, data communication, phase
Machine operates and record operates associated operation.Processing element 502 can refer to including one or more processors 520 to perform
It enables, to perform all or part of the steps of the methods described above.In addition, processing component 502 can include one or more modules, just
Interaction between processing component 502 and other assemblies.For example, processing component 502 can include multi-media module, it is more to facilitate
Interaction between media component 508 and processing component 502.
Memory 504 is configured as storing various types of data to support the operation in equipment 500.These data are shown
Example includes the instruction of any application program or method for operating on device 500, contact data, and telephone book data disappears
Breath, picture, video etc..Memory 504 can be by any kind of volatibility or non-volatile memory device or their group
It closes and realizes, such as static RAM (SRAM), electrically erasable programmable read-only memory (EEPROM) is erasable to compile
Journey read-only memory (EPROM), programmable read only memory (PROM), read-only memory (ROM), magnetic memory, flash
Device, disk or CD.
Electric power assembly 506 provides electric power for the various assemblies of device 500.Electric power assembly 506 can include power management system
System, one or more power supplys and other generate, manage and distribute electric power associated component with for device 500.
Multimedia component 508 is included in the screen of one output interface of offer between described device 500 and user.One
In a little embodiments, screen can include liquid crystal display (LCD) and touch panel (TP).If screen includes touch panel, screen
Curtain may be implemented as touch screen, to receive input signal from the user.Touch panel includes one or more touch sensings
Device is to sense the gesture on touch, slide, and touch panel.The touch sensor can not only sense touch or sliding action
Boundary, but also detect duration and pressure associated with the touch or slide operation.In some embodiments, more matchmakers
Body component 508 includes a front camera and/or rear camera.When equipment 500 is in operation mode, such as screening-mode or
During video mode, front camera and/or rear camera can receive external multi-medium data.Each front camera and
Rear camera can be a fixed optical lens system or have focusing and optical zoom capabilities.
Audio component 510 is configured as output and/or input audio signal.For example, audio component 510 includes a Mike
Wind (MIC), when device 500 is in operation mode, during such as call model, logging mode and speech recognition mode, microphone by with
It is set to reception external audio signal.The received audio signal can be further stored in memory 504 or via communication set
Part 516 is sent.In some embodiments, audio component 510 further includes a loud speaker, for exports audio signal.
I/O interfaces 512 provide interface between processing component 502 and peripheral interface module, and above-mentioned peripheral interface module can
To be keyboard, click wheel, button etc..These buttons may include but be not limited to：Home button, volume button, start button and lock
Determine button.
Sensor module 514 includes one or more sensors, and the state for providing various aspects for device 500 is commented
Estimate.For example, sensor module 514 can detect opening/closed state of equipment 500, and the relative positioning of component, for example, it is described
Component is the display and keypad of device 500, and sensor module 514 can be with 500 1 components of detection device 500 or device
Position change, the existence or non-existence that user contacts with device 500,500 orientation of device or acceleration/deceleration and device 500
Temperature change.Sensor module 514 can include proximity sensor, be configured to detect without any physical contact
Presence of nearby objects.Sensor module 514 can also include optical sensor, such as CMOS or ccd image sensor, for into
As being used in application.In some embodiments, which can also include acceleration transducer, gyro sensors
Device, Magnetic Sensor, pressure sensor or temperature sensor.
Communication component 516 is configured to facilitate the communication of wired or wireless way between device 500 and other equipment.Device
500 can access the wireless network based on communication standard, such as WiFi, 2G or 3G or combination thereof.In an exemplary implementation
In example, communication component 516 receives broadcast singal or broadcast related information from external broadcasting management system via broadcast channel.
In one exemplary embodiment, the communication component 516 further includes near-field communication (NFC) module, to promote short range communication.Example
Such as, NFC module can be based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra wide band (UWB) technology,
Bluetooth (BT) technology and other technologies are realized.
In the exemplary embodiment, device 500 can be believed by one or more application application-specific integrated circuit (ASIC), number
Number processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array
(FPGA), controller, microcontroller, microprocessor or other electronic components are realized, for performing the above method.
In the exemplary embodiment, a kind of non-transitorycomputer readable storage medium including instructing, example are additionally provided
Such as include the memory 504 of instruction, above-metioned instruction can be performed to complete the above method by the processor 520 of device 500.For example,
The non-transitorycomputer readable storage medium can be ROM, random access memory (RAM), CD-ROM, tape, floppy disk
With optical data storage devices etc..
Those skilled in the art will readily occur to the disclosure its after considering specification and putting into practice disclosure disclosed herein
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principle of the disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as illustratively, and the true scope and spirit of the disclosure are by following
Claim is pointed out.
It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by appended claim.
Claims (9)
- A kind of 1. method of interference frequency point for filtering out mobile terminal, which is characterized in that the method includes：Determine the signal strength of the interference signal from USB data line and the first center frequency point of the interference signal；It is described dry Disturb the interference signal that signal is USB charger or computer generates mobile terminal；It is located at the variable of the wave invigorating network in the USB data line according to the signal strength and first center frequency point adjustment The capacitance of capacitance；The second center frequency point of the wave invigorating network is adjusted according to the capacitance after adjustment, make first center frequency point with Second center frequency point is identical.
- 2. the according to the method described in claim 1, it is characterized in that, letter for determining the interference signal from USB data line First center frequency point of number intensity and the interference signal, including：Receive the interference signal of the data port from USB data line；The first center frequency point of the signal strength and the interference signal in the interference signal is detected by frequency spectrum detection circuit.
- It is 3. according to the method described in claim 1, it is characterized in that, described according to the signal strength and first center frequency Point adjustment is located at the capacitance of the variable capacitance of the wave invigorating network in the USB data line, including：The variable of wave invigorating network in the USB data line is determined according to the signal strength and first center frequency point The capacitance of the needs of capacitance；The capacitance of variable capacitance in the wave invigorating network is adjusted to the capacitance of the needs.
- 4. according to the method described in claim 1, it is characterized in that, the wave invigorating network be passive twin-T network, described second Center frequency point is F=1/2 π (R*C), wherein, R is the resistance value of the resistance in the wave invigorating network, and C is in the wave invigorating network The capacitance of variable capacitance, π are constant.
- 5. a kind of device of interference frequency point for filtering out mobile terminal, which is characterized in that described device includes：First determining module is configured to determine that the signal strength of the interference signal from USB data line and the interference signal The first center frequency point；The first adjustment module is configured as the signal strength determined according to first determining module and first center Frequency point adjustment is located at the capacitance of the variable capacitance of the wave invigorating network in the USB data line；Second adjustment module is configured as the capacitance after being adjusted according to the first adjustment module and adjusts the trap net Second center frequency point of network makes first center frequency point identical with second center frequency point.
- 6. device according to claim 5, which is characterized in that first determining module includes：Receiving submodule is configured as receiving the interference signal of the data port from USB data line；Detection sub-module is configured as the interference signal for detecting the receiving submodule by frequency spectrum detection circuit and receiving In signal strength and the interference signal the first center frequency point.
- 7. device according to claim 5, which is characterized in that the first adjustment module includes：Determination sub-module, be configured as according to the signal strength and first center frequency point determine the wave invigorating network can Become the capacitance of the needs of capacitance；Submodule is adjusted, is configured as adjusting the capacitance of the variable capacitance in the wave invigorating network to the determination sub-module The capacitance of the determining needs.
- 8. device according to claim 5, which is characterized in that the wave invigorating network be passive twin-T network, described second Center frequency point is F=1/2 π (R*C), wherein, R is the resistance value of the resistance in the wave invigorating network, and C is in the wave invigorating network The capacitance of variable capacitance, π are constant.
- 9. a kind of device of interference frequency point for filtering out mobile terminal, which is characterized in that described device includes：Processor；For storing the memory of processor-executable instruction；Wherein, the processor is configured as：Determine the signal strength of the interference signal from USB data line and the first center frequency point of the interference signal；It is located at the variable of the wave invigorating network in the USB data line according to the signal strength and first center frequency point adjustment The capacitance of capacitance；The second center frequency point of the wave invigorating network is adjusted according to the capacitance after adjustment, make first center frequency point with Second center frequency point is identical.
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| CN105357355B (en) * | 2015-11-10 | 2018-06-12 | 广东欧珀移动通信有限公司 | The control method of communication terminal and its antenna assembly working condition, control device |
| CN106454944A (en) * | 2016-09-20 | 2017-02-22 | 乐视控股（北京）有限公司 | Data transmission method, apparatus and terminal |
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| EP2225805A4 (en) * | 2007-12-28 | 2011-12-28 | Autosplice Inc | Low-cost connector apparatus and methods for use in high-speed data applications |
| US20100002815A1 (en) * | 2008-07-01 | 2010-01-07 | Qualcomm Incorporated | Dynamic filtering for adjacent channel interference suppression |
| US8559865B2 (en) * | 2008-07-31 | 2013-10-15 | Qualcomm Incorporated | Method and apparatus for providing jammer detection in a receiver |
| CN101822540A (en) * | 2010-04-28 | 2010-09-08 | 上海诺诚电气有限公司 | Myoelectricity amplifier and method for sampling myoelectricity signals |
| CN103119801B (en) * | 2010-09-22 | 2015-05-20 | 惠普发展公司，有限责任合伙企业 | Modular interface systems and methods |
| US8436679B1 (en) * | 2012-02-13 | 2013-05-07 | King Fahd University Of Petroleum And Minerals | Low frequency notch filter integrated circuit |
| CN202550228U (en) * | 2012-04-25 | 2012-11-21 | 华为终端有限公司 | Universal serial bus (USB) head and USB equipment with same |
| CN203675061U (en) * | 2013-12-19 | 2014-06-25 | 天津光电通信技术有限公司 | Double-T network adjustable wave trap |
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