CN216794162U - Anti-interference circuit and anti-interference data line - Google Patents
Anti-interference circuit and anti-interference data line Download PDFInfo
- Publication number
- CN216794162U CN216794162U CN202123339512.5U CN202123339512U CN216794162U CN 216794162 U CN216794162 U CN 216794162U CN 202123339512 U CN202123339512 U CN 202123339512U CN 216794162 U CN216794162 U CN 216794162U
- Authority
- CN
- China
- Prior art keywords
- line
- data transmission
- data
- controller
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Dc Digital Transmission (AREA)
Abstract
The application relates to an anti-jamming circuit and an anti-jamming data line. Wherein, anti jamming circuit is applied to data transmission line, and data transmission line includes a plurality of differential line pairs, and every differential line pair includes two differential lines, its characterized in that includes: the speed acquisition unit and the variable capacitance units are respectively electrically connected with the controller, each differential line is connected with one end of at least one variable capacitance unit, and the other end of each variable capacitance unit is grounded; the speed acquisition unit is used for acquiring the data transmission speed of the data transmission line and sending the data transmission speed to the controller; and the controller is used for respectively determining the capacitance values of the variable capacitance units according to the data transmission rate and respectively adjusting the variable capacitance units according to the capacitance values. The technical problem that a wide-band signal transmitted by a data interface of an equipment terminal interferes with a wireless WIFI module of the equipment terminal in the related technology is solved.
Description
Technical Field
The application relates to the field of high-frequency data transmission, in particular to an anti-interference circuit and an anti-interference data line.
Background
In recent years, with the rapid update and iteration of electronic products, data interfaces of device terminals (e.g., notebook computers, digital set-top boxes) are becoming more abundant, wherein the data interfaces include usb (universal Serial bus), hdmi (high Definition Multimedia interface), and the like.
If the device terminal accesses the network through Wireless Fidelity (WIFI), the accessed content is displayed through an HDMI interface or data exchange is performed through a USB interface, and if the HDMI interface transmits high-speed audio/video signals or the USB interface transmits high-capacity data exchange signals, the Wireless WIFI is easily subjected to high-speed audio/video signals or radiation interference of the high-capacity data exchange signals due to weak interference resistance, so that noise in the Wireless WIFI signals is greatly improved, and the performance of the Wireless WIFI module is reduced.
Under a general condition, the interference of the output signal of the HDMI to the wireless WIFI signal is reduced by expanding the distance between the HDMI and the wireless WIFI module, or the interference of the output signal of the USB interface to the wireless WIFI signal is reduced by increasing the distance between the USB interface and the wireless WIFI module. However, with the development of the device terminal toward miniaturization, light weight, and multi-functionalization, the number of hardware functional modules in the product increases, the available area of the PCB becomes smaller, and it is not feasible to reduce the interference of the output signal of the interface to the wireless WIFI signal by enlarging the distance.
In the prior art, the anti-interference capability of the wire core in use can be improved and the transmission efficiency of signals can be improved by adding a multilayer structure of an insulating layer, an aluminum foil wave absorbing layer, a woven wave absorbing layer and a rubber protective layer at the wire core connector. However, the method of adding a shielding mode or an aluminum foil wave-absorbing layer at the position of the wire core connector has a single anti-interference effect and only has an effect on the interference of a specific frequency point. Like HDMI output interface data transmission rate is the signal that changes along with the change of the resolution ratio of display, and HDMI output interface signal or USB output interface signal are the interference of a wide band to wireless WIFI signal promptly, so install shielded mode additional at sinle silk interface and can not solve the problem of the interference that the wide band output signal produced wireless WIFI signal.
Aiming at the technical problem that a wide-band signal transmitted by a data interface of an equipment terminal in the related technology generates interference on a wireless WIFI module of the equipment terminal, no effective solution is provided at present.
Disclosure of Invention
The embodiment provides an anti-jamming circuit and an anti-jamming data line, and aims to solve the technical problem that a wide-band signal transmitted by a data interface of an equipment terminal in the related art interferes with a wireless WIFI module of the equipment terminal.
In a first aspect, in this embodiment, an anti-interference circuit is provided, which is applied to a data transmission line including a plurality of differential line pairs, each differential line pair including two differential lines, and includes: the speed acquisition unit and the variable capacitance units are respectively electrically connected with the controller, each differential line is connected with one end of at least one variable capacitance unit, and the other end of each variable capacitance unit is grounded; the rate acquiring unit is used for acquiring the data transmission rate of the data transmission line and sending the data transmission rate to the controller; the controller is configured to determine capacitance values of the plurality of variable capacitance units according to the data transmission rate, and adjust the plurality of variable capacitance units according to the capacitance values.
In some embodiments, the controller further comprises a detection unit, wherein the detection unit is electrically connected with the controller;
the detection unit is used for activating the controller under the condition that an external power supply signal is detected;
and the controller controls the rate acquisition unit to acquire the data transmission rate under the condition of being activated.
In some embodiments, in the case that the data transmission line is a bidirectional transmission line, the detection unit is further configured to obtain a data transmission direction in the data transmission line;
the controller is further configured to determine at least one target differential line pair used for data transmission among the plurality of differential line pairs according to the data transmission direction, and adjust the variable capacitance unit connected to the at least one target differential line pair according to the data transmission rate.
In some embodiments, the variable capacitor unit includes a switch array unit and a capacitor array unit, and the capacitance value of the variable capacitor is adjusted by adjusting the on or off of a switch in the switch array unit.
In some of these embodiments, the data transmission line further comprises at least one auxiliary signal line, the data transmission rate on the at least one auxiliary signal line being lower than the data transmission rate on the differential line;
the rate obtaining unit comprises a decoding module, the decoding module is connected in series in the at least one auxiliary signal line, and the decoding module is used for obtaining the data transmission rate on the at least one auxiliary signal line or determining the transmission rate on the auxiliary signal line according to the resolution of a display connected with the data transmission line.
In some of these embodiments, the auxiliary signal line comprises I2And C, a bus.
In some embodiments, the data transmission line further includes a configuration channel port, the configuration channel port is configured to determine different transmission modes of the data transmission line, and the decoding module is further configured to obtain the transmission mode of the data transmission line from the configuration channel port and determine the data transmission rate according to a manner matching the transmission mode.
In a second aspect, there is provided in this embodiment a tamper resistant data line comprising the tamper resistant circuit of the first aspect.
In some of these embodiments, both ends of the immunity data line include the immunity circuit.
In some embodiments, two controllers in the anti-jamming data line are respectively provided with a control end, and the two control ends are electrically connected, and when one of the controllers is activated, the activated controller sends an instruction to the other control end through the control end to limit the other controller from being activated.
Compared with the related art, in the anti-interference circuit provided in this embodiment, the transmission rate of the exchange signal of the full-digital video and/or audio or large capacity is acquired by the rate acquisition unit, and the transmission rate is sent to the controller, the controller adjusts the capacitance values of the variable capacitance units to the capacitance value of the ground capacitance corresponding to the current transmission rate according to the transmission rate, and the interference signal generated by the exchange signal of the full-digital video and/or audio or large capacity to the wireless WIFI module is filtered by the variable capacitance units. Through the embodiment, the technical problem that the wide-band signal transmitted by the data interface of the equipment terminal interferes with the wireless WIFI module of the equipment terminal in the related technology is solved, and the performance of the wireless WIFI module is improved.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of a jamming immunity circuit according to one embodiment of the present application;
FIG. 2 is a schematic diagram of a jamming immunity circuit according to yet another embodiment of the present application;
FIG. 3 is a circuit diagram of a tamper resistant circuit according to one embodiment of the present application;
fig. 4 is a schematic wiring diagram of the variable capacitance unit in the HDMI data line core according to an embodiment of the present application;
FIG. 5 is a schematic diagram of the connection of the variable capacitance unit in the USB TYPE-C data line core according to one embodiment of the present application;
FIG. 6 is a schematic diagram of an application of a tamper resistant data line according to an embodiment of the present application.
Detailed Description
For a clearer understanding of the objects, aspects and advantages of the present application, reference is made to the following description and accompanying drawings.
Unless defined otherwise, technical or scientific terms used herein shall have the same general meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" and "an" and "the" and similar referents in the context of this application do not denote a limitation of quantity, either in the singular or the plural. The terms "comprises," "comprising," "has," "having," and any variations thereof, as referred to in this application, are intended to cover non-exclusive inclusions; for example, a process, method, and system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or modules, but may include other steps or modules (elements) not listed or inherent to such process, method, article, or apparatus. Reference throughout this application to "connected," "coupled," and the like is not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference to "a plurality" in this application means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. In general, the character "/" indicates a relationship in which the objects associated before and after are an "or". The terms "first," "second," "third," and the like in this application are used for distinguishing between similar items and not necessarily for describing a particular sequential or chronological order.
The following describes the anti-jamming circuit in detail with reference to the accompanying drawings. Fig. 1 is a schematic structural diagram of an anti-jamming circuit according to an embodiment of the present application, and as shown in fig. 1, in this embodiment, an anti-jamming circuit is provided and applied to a data transmission line, where the data transmission line includes a plurality of differential line pairs, each differential line pair includes two differential lines, and the anti-jamming circuit includes: the speed acquisition unit 200 and the variable capacitance units 300 are respectively electrically connected with the controller 400, each differential line is connected with one end of at least one variable capacitance unit 300, and the other end of the variable capacitance unit 300 is grounded; the rate obtaining unit 200 is configured to obtain a data transmission rate of the data transmission line, and send the data transmission rate to the controller 400; the controller 400 is configured to determine capacitance values of the variable capacitance units 300 according to the data transmission rate, and adjust the variable capacitance units 300 according to the capacitance values.
In one embodiment of the present application, the data transmission line may include a transmission line for transmitting data having a capacity greater than a preset threshold. To the data transmission line of transmission large capacity data, often need higher transmission rate, consequently produce great radiation interference to wireless transmission modules such as WIFI module easily, consequently, the anti-jamming circuit that this application each embodiment provided accords with the user demand of this type of data transmission line more.
In an embodiment of the present application, the data transmission line may include an interface portion and a core portion, wherein the interface portion is configured to be connected to a device and to be adapted to a port in the device. The wire core part is used for transmitting data or electric energy and the like.
The interface of the data transmission line may include a high-definition multimedia interface (i.e., an HDMI interface), and the data line with the HDMI interface is mainly used for transmitting data such as full-digital video and audio. The interface of the data transmission line can also comprise a serial bus interface (namely a USB interface), and the data line with the USB interface is mainly used for transmitting data such as full-digital video and/or audio, wherein the USB interface can comprise USB type-A, USB type-B, USB type-C and the like. Of course, in other embodiments, the data transmission line may also include a transmission line of any other type of interface, and the application is not limited herein.
The data transmission line can comprise a plurality of wire cores, some wire cores are used for transmitting signals, such as a differential wire pair wire core and an auxiliary signal wire core, some wire cores are used for transmitting electric energy, such as a power supply wire core and the like, and different wire cores have different functions. In the embodiment of the present application, the differential line pair includes two differential lines, and the two differential lines transmit differential signals with the same amplitude and opposite phases. The differential line pair has the technical advantages of strong anti-interference capability and reduction or elimination of external common mode noise, and is often used for high-speed transmission of large-capacity data. For example, for a USB data line, fig. 5 is a schematic wiring diagram of the variable capacitance unit in the USB TYPE-C data line core according to the embodiment of the present application, as shown in fig. 5, the USB TYPE-C interface includes 4 pairs of differential lines, where a terminal Tx1+ and a terminal Tx 1-are a pair of differential lines, and the other three pairs of differential lines are respectively: terminal Tx2+ and terminal Tx 2-are a pair of differential lines, terminal Rx1+ and terminal Rx 1-are a pair of differential lines, and terminal Rx2+ and terminal Rx 2-are a pair of differential lines. For the HDMI data line, fig. 4 is a schematic wiring diagram of the variable capacitor unit in the HDMI data line core according to the embodiment of the present application, and as shown in fig. 4, the HDMI interface includes 4 pairs of differential line pairs, which are terminal D0+ and terminal D0-, terminal D1+ and terminal D1-, terminal D2+ and terminal D2-, terminal CLK + and terminal CLK-.
In the embodiment of the present application, the rate obtaining unit 200 may include a circuit module for obtaining the data transmission rate of the data transmission line. Specifically, in an example, taking a transmission line with an HDMI interface as an example, the rate obtaining unit 200 may be a decoding module, and in this embodiment of the present application, the decoding module is connected in series in a data transmission line core and may be used to obtain a data transmission rate on the transmission line, for example, the decoding module may include an electronic Marker Cable chip (e-mark chip). In a specific structure, the rate obtaining unit 200 may be connected in series to the differential core in the data transmission line, and of course, the rate obtaining unit 200 may also be connected in series to the auxiliary signal core. As shown in fig. 3, in a specific example, taking a transmission line with an HDMI interface as an example, the serially connecting the rate obtaining unit 200 to the auxiliary signal line core may include first disconnecting the auxiliary signal line Serial Loop Communication (SCL) core, then serially connecting a pair of terminals D10 and D11 of the rate obtaining unit 200 to both ends of the disconnected auxiliary signal line SCL core, and at the same time, also need to disconnect the auxiliary signal line synchronization Data core (SDA), and serially connecting a pair of terminals D20 and D22 of the rate obtaining unit 200 to both ends of the disconnected auxiliary signal line SDA core, and the rate obtaining unit 200 may obtain the signal transmission rate of the transmission line with the HDMI interface.
In another specific example, the rate obtaining unit 200 may be serially connected to a transmission line having a USB type-C interface for obtaining a signal transmission rate of the transmission line, for example, the rate obtaining unit 200 may be serially connected to an auxiliary signal line core, and the rate obtaining unit 200 may be serially connected to a differential line core, where the present application is described as being serially connected to an auxiliary signal line, the auxiliary signal line SUB1 is first broken, a pair of terminals D10 and D11 of the rate obtaining unit 200 are serially connected to two ends of the broken auxiliary signal line SUB1, and at the same time, the auxiliary signal line SUB2 is broken, and a pair of terminals D20 and D22 of the rate obtaining unit 200 are serially connected to two ends of the broken auxiliary signal line SUB2, and the rate obtaining unit 200 may obtain a signal transmission rate of the transmission line having the interface.
Of course, in other embodiments, the rate obtaining unit 200 may also be connected in series in other types of data transmission lines for obtaining the signal transmission rate on the data transmission line, which is not illustrated here.
In the embodiment of the present application, the controller 400 may include a Single-Chip Microcomputer (e.g., a Single-Chip Microcomputer), a Microprocessor (MPU), a Micro Control Unit (MCU), and any processor, Chip, and the like having a data processing function. Taking a single chip microcomputer as the controller 400 for example, the type of the single chip microcomputer may be AT89C51, the rate obtaining unit 200 is connected to an IO port of the single chip microcomputer, and the single chip microcomputer receives a signal transmission rate on the data transmission line and adjusts the variable capacitance unit 300 according to the signal transmission rate.
In this embodiment of the application, the variable capacitance unit 300 is a capacitance module whose capacitance value can be adjusted within a certain range, there is a corresponding relationship between the transmission rate of data and the capacitance of the variable capacitance unit 300, the corresponding relationship between them can be preset in the memory of the single chip microcomputer, when the single chip microcomputer acquires the transmission rate of data, correspondingly, the capacitance value of the variable capacitance unit 300 is adjusted to the capacitance value corresponding to the current data transmission rate, and the interference signal generated by the wireless WIFI module by the exchange signal of the full-digital video and/or audio or large capacity is filtered by the variable capacitance units 300.
In one specific example, there is a correspondence between the transmission rate and the capacitance of the variable capacitance unit 300 as shown in the following table:
| transmission rate | Variable capacitance value |
| 1.5Gbps～1.8Gbps | 100μF |
| 1.8Gbps～2.5Gbps | 200μF |
| 2.5Gbps～5.0Gbps | 500μF |
| 5.0Gbps～6.5Gbps | 600μF |
| 6.5Gbps～8.5Gbps | 800μF |
The correspondence between the transmission rate and the capacitance of the variable capacitance unit 300 is not limited to the above table, and other correspondence may exist, which is not described in detail in this embodiment.
In this embodiment of the application, what transmit on the differential line is full-digital video and/or audio, or exchange signal with large capacity, because full-digital video and/or audio or exchange signal with large capacity will produce the interference to the WIFI module, resulting in the reduction of the performance of the WIFI module, variable capacitance unit 300 needs to be connected on the differential line for filtering the interference signal that the full-digital video and/or audio or exchange signal with large capacity produced to the WIFI module, so as to improve the performance of the WIFI module.
In this embodiment, the controller 400 obtains the transmission rate of the full digital video and/or audio or large-capacity exchange signal through the rate obtaining unit 200, and the controller 400 adjusts the capacitance values of the variable capacitance units 300 to the capacitance value of the ground capacitance corresponding to the current transmission rate according to the transmission rate of the full digital video and/or audio or large-capacity exchange signal. In one specific example, for example, the variable capacitance unit 300 includes a switch array unit and a capacitance array unit, and the capacitance value of the variable capacitance unit 300 is adjusted by adjusting the closing or opening of switches in the switch array unit. Of course, in other embodiments of the present application, the structure of the variable capacitor unit 300 is not limited to the above-mentioned embodiment, and may be other combinations of switches and capacitors for adjusting the magnitude of the capacitance value, and the variable capacitor unit 300 may also adjust the magnitude of the capacitance value by adjusting the distance between two plates of the capacitor respectively.
In the embodiment of the present application, taking the variable capacitance unit 300 including the switch array unit and the capacitor array unit as an example, the adjustment process of the capacitance value adjustment of the variable capacitance unit 300 is as shown in fig. 3, the switch array unit includes N sets of switches Sw1 to Swn, and the first terminals of the switches of each set are connected in parallel to form a common terminal. The capacitor array unit comprises N groups of capacitors C1 to Cn, a group of capacitors is connected in series corresponding to each group of switches, the capacitance values of each group of capacitors connected with the switch array unit are different, the capacitance values from the capacitor C1 to the capacitor Cn can be sequentially increased, in other embodiments, the capacitance values from the capacitor C1 to the capacitor Cn can be sequentially decreased, in other embodiments, the capacitance values from the capacitor C1 to the capacitor Cn can be any capacitance values, and the capacitance values from the capacitor C1 to the capacitor Cn do not have an increasing or decreasing relationship.
In one specific example, for example, capacitance value of capacitor C1 is 100 μ F, capacitance value of capacitor C2 is 200 μ F, capacitance value of capacitor C3 is 300 μ F, capacitance value of capacitor C4 is 400 μ F, capacitance value of capacitor C5 is 500 μ F, capacitance value of capacitor C6 is 600 μ F, capacitance value of capacitor C7 is 700 μ F, capacitance value of capacitor C8 is 800 μ F, when the rate obtaining unit 200 detects that the current transmission rate is 1.62Gbps, and sends the current transmission rate signal to the controller 400, the controller 400 queries the capacitance value corresponding to the current transmission rate signal, and adjusts the capacitance value of the variable capacitance unit 300 to 100 μ F, that is, the controller 400 controls the switch SW1 in the switch array to close, connects the capacitor C1 into the circuit, interference signals generated by the WIFI wireless module are filtered out by the capacitors C1 in the variable capacitor units 300 from fully digitized video and/or audio or high-capacity exchange signals.
Compared with the related art, in the anti-jamming circuit provided in this embodiment, the rate obtaining unit 200 obtains the transmission rate of the full-digital video and/or audio or large-capacity exchange signal, and sends the transmission rate to the controller 400, the controller 400 adjusts the capacitance values of the plurality of variable capacitance units 300 to the capacitance value of the ground capacitor corresponding to the current transmission rate according to the transmission rate, and the jamming signal generated by the full-digital video and/or audio or large-capacity exchange signal to the wireless WIFI module is filtered by the plurality of variable capacitance units 300. Through the embodiment, the technical problem that the wide-band signal transmitted by the data interface of the equipment terminal interferes with the wireless WIFI module of the equipment terminal in the related technology is solved, and the performance of the wireless WIFI module is improved.
In some embodiments, the immunity circuit further includes a detection unit 100, fig. 2 is a schematic structural diagram of the immunity circuit according to another embodiment of the present application, and as shown in fig. 2, the detection unit 100 is electrically connected to the controller 400; the detection unit 100 is configured to activate the controller 400 when an external power supply signal is detected; the controller 400 controls the rate acquisition unit 200 to acquire the data transmission rate if activated.
In this embodiment of the application, when an external power source is connected to the detection unit 100 for detection, the detection unit 100 sends a signal that the external power source is connected to the controller 400, when the controller 400 obtains that the external power source is connected to the detection unit, the controller 400 is activated, the controller 400 obtains the transmission rate of the exchange signal of full-digital video and/or audio or large capacity through the rate obtaining unit 200, the controller 400 adjusts the capacitance values of the plurality of variable capacitance units 300 to the capacitance value of the ground capacitor corresponding to the current transmission rate according to the transmission rate, and the interference signal generated by the exchange signal of full-digital video and/or audio or large capacity to the WIFI module is filtered through the plurality of variable capacitance units 300. In the embodiment of the present application, the controller 400 does not need to acquire the signal transmission rate of the rate acquiring unit 200 in real time, so that power consumption is greatly reduced.
In some embodiments, in the case that the data transmission line is a bidirectional transmission line, the detection unit 100 is further configured to obtain a data transmission direction in the data transmission line; the controller 400 is further configured to determine at least one target differential line pair used for data transmission among the plurality of differential line pairs according to the data transmission direction, and adjust the variable capacitance unit 300 connected to the at least one target differential line pair according to the data transmission rate.
In this embodiment, the bidirectional transmission line means that data to be transmitted can be read from the device terminal through the data transmission line, and can also be written into the device terminal through the data transmission line.
Since the differential pair of data transmission lines used to read data from the device terminal through the data transmission lines is different from the differential pair of data transmission lines used to write data to the device terminal through the data transmission lines, after the controller 400 acquires the data transmission direction, the controller 400 acquires the differential line pair used for writing or reading data to the device terminal in the data transmission line, the controller 400 obtains the read rate of the data or the write rate of the data according to the rate obtaining unit 200, and the capacitance values of the plurality of variable capacitance units 300 connected to the differential line pair for reading data in the transmission data lines are adjusted to the capacitance value of the ground capacitance corresponding to the current transmission rate according to the reading rate of the data, or the capacitance values of the variable capacitance units 300 connected to the differential line pair for writing data in the transmission data lines are adjusted to the capacitance value of the ground capacitance corresponding to the current transmission rate according to the data writing rate.
In some embodiments, as shown in fig. 3, the data transmission line further includes at least one auxiliary signal line, and the data transmission rate of the at least one auxiliary signal line is lower than the data transmission rate of the differential line; the rate obtaining unit 200 includes a decoding module, which is connected in series to the at least one auxiliary signal line, and the decoding module is configured to obtain a data transmission rate on the at least one auxiliary signal line, or determine a transmission rate on the auxiliary signal line according to a resolution of a display to which the data transmission line is connected.
In this embodiment of the present application, since the data transmission rate on the auxiliary signal line is lower than the data transmission rate on the differential line, the data transmission on the auxiliary signal line is not easily affected by an external interference signal, and the obtained data transmission rate on the auxiliary signal line is close to the true value of the data transmission rate. In an example, the Auxiliary signal line may be an SDA line, a Hot Plug Detection (HPD) line, or a Channel line (CC) configured in the HDMI core, an Auxiliary line (AUX), or the like, where the control signal on the Auxiliary signal line does not interfere with the WIFI signal.
In this embodiment of the application, the decoding module may identify an electronic identity tag of the data transmission line, and the decoding module may enable the device terminal to obtain attributes of each core of the data transmission line, for example, information such as data transmission capability and video transmission capability.
In this embodiment of the present application, the decoding module may also be an E-Marker chip (electronic Marker Cable), and the decoding module may directly read a data transmission rate on the at least one auxiliary signal line, or negotiate a transmission resolution according to a resolution of a display to which the data transmission line is connected, and then convert the transmission resolution into a transmission rate of a differential pair.
In some of these embodiments, the auxiliary signal line comprises I2And C, a bus.
In the embodiment of the application, the decoding module is connected in series with the auxiliary signal line and comprises I2In the C bus, in one example, the D10 pin and the D11 pin of the decode module are connected in series in the SCL line, and the D20 pin and the D22 pin of the decode module are connected in series in the SDA line.
In some embodiments, the data transmission line further includes a configuration channel port, the configuration channel port is configured to determine different transmission modes of the data transmission line, and the decoding module is further configured to obtain the transmission mode of the data transmission line from the configuration channel port and determine the data transmission rate according to a manner matching the transmission mode.
In this embodiment of the present application, the configuration channel port is configured to determine different transmission modes of the data transmission line, in an example, the data transmission line is a core of a USB interface, the configuration channel port is a CC pin, and a transmission attribute of the data transmission core is obtained through the CC pin, for example, the obtained transmission attribute of the data transmission core is a USB Super Speed attribute, and a transmission rate of the transmission core may be obtained through a decoding module.
In another example, when the data transmission line is a line core of a USB interface, the attribute of the data transmission line core acquired through the CC pin is an HDMI attribute, the decoding module negotiates a transmission resolution according to a resolution of a display to which the data transmission line is connected, and then the decoding module converts the transmission resolution into a transmission rate of a differential pair.
In another example, when the data transmission line is a line core of a USB interface, the attribute of the data transmission line core obtained through the CC pin is a Display Port (DP) attribute, and the transmission rate of the data transmission line core is obtained through a decoding module.
In one example, the D10 pin and the D11 pin of the decode module are connected in series in the CC line, the D20 pin and the D22 pin of the decode module are connected in series in the SBU1 line, and the D30 pin and the D33 pin of the decode module are connected in series in the SBU2 line.
In a second aspect, there is provided in this embodiment a tamper resistant data line comprising the tamper resistant circuit of the first aspect.
In some of these embodiments, both ends of the immunity data line include the immunity circuit.
In some embodiments, two controllers 400 in the interference-free data line are respectively provided with a control end, and the two control ends are electrically connected, and when one controller 400 is activated, the activated controller 400 sends a command to the other control end through the control end to limit the activation of the other controller 400.
In some of these embodiments, the tamper resistant data line comprises an HDMI signal transmission line or a USB signal transmission line.
In the embodiment of the present application, the anti-interference data line is an HDMI signal transmission line. Fig. 4 is a schematic wiring diagram of the variable capacitance unit 300 in the HDMI data line core according to the embodiment of the present application, as shown in fig. 3 and fig. 4, there are 8 groups of variable capacitance units 300 connected to the HDMI signal transmission line, one end of each of the 8 groups of variable capacitance units 300 is connected to a differential line, and the other end of each of the 8 groups of variable capacitance units 300 is grounded.
The input end of the detection unit 100 is connected to the 5V power end of the HDMI signal transmission line, the pin D10 and the pin D11 of the decoding module are connected in series to an SCL (Serial Communication Loop) line of the HDMI anti-interference Data line, and the pin D20 and the pin D22 of the decoding module are connected in series to an SDA (Synchronous Data Adapter) line of the HDMI anti-interference Data line.
Fig. 6 is a schematic diagram of an application of the interference-free data line according to the present embodiment, and as shown in fig. 6, in the present embodiment, an application of the HDMI signal transmission line between the device terminal and the display is taken as an example for description.
In this embodiment, an HDMI signal transmission line is connected between a device terminal and a display, if the detection unit 100 acquires a power signal from the HDMI signal transmission line, the controller 400 is activated, the rate acquisition unit 200 starts to detect a data transmission rate on an auxiliary signal line in the HDMI signal transmission line, that is, a pair of pins of the decoding module are connected in series in an SCL line, another pair of pins are connected in series in an SDA line, the decoding module negotiates a transmission resolution according to the resolution of the display, and then the decoding module converts the transmission resolution into a data transmission rate between the device terminal and the display. After the data transmission rate between the device terminal and the display is obtained through control, the controller 400 adjusts the capacitance values of the 8 variable capacitance units 300 to the capacitance value of the ground capacitance corresponding to the data transmission rate according to the data transmission rate between the device terminal and the display. The effect of reducing the interference generated on the wireless WIFI module of the equipment terminal when high-speed audio and video signals are transmitted between the equipment terminal and the display is achieved.
In one example, for example, the decoding module obtains a resolution of 3840 × 2160 of the display, and accordingly, a transmission rate in the HDMI-type signal transmission line is 5.97Gbps, the decoding module reads information corresponding to 5.97Gbps recorded in Flash, further, the controller 400 controls to adjust the capacitance value of the variable capacitance unit 300 so that the ground capacitance of the variable capacitance unit 300 becomes a corresponding capacitance value of 5.97Gbps, therefore, when high-speed audio/video signals are transmitted between the device terminal and the display, interference signals generated on the WIFI module are transmitted to the ground terminal through the 8 variable capacitor units 300, audio data signals between the device terminal and the display are transmitted to the display through the HDMI-type signal transmission line, therefore, the technical effect of filtering interference signals is achieved, interference on the wireless WiFi module is reduced, and the wireless working performance of the terminal equipment is effectively guaranteed.
In the embodiment of the application, the anti-interference data line is a USB TYPE-C signal transmission line. Fig. 5 is a schematic wiring diagram of the variable capacitance unit 300 in the USB TYPE-C anti-interference data core according to the embodiment of the present application, and as shown in fig. 3 and fig. 5, there are 8 groups of variable capacitance units 300 connected to the USB TYPE-C signal transmission line, one end of 8 groups of variable capacitance units 300 are respectively connected to the differential line, and the other end of 8 groups of variable capacitance units 300 is grounded.
The input end of the detection unit 100 is connected with a Vconn power supply end of a USB TYPE-C signal transmission line, a D10 pin and a D11 pin of the decoding module are connected in series in a CC line, a D20 pin and a D22 pin of the decoding module are connected in series in an SBU1 line, and a D30 pin and a D33 pin of the decoding module are connected in series in an SBU2 line.
Fig. 6 is a schematic application diagram of the interference-free data line of the present embodiment, as shown in fig. 6, in the present embodiment, an application of a USB TYPE-C signal transmission line between a device terminal and a display is taken as an example for description.
In this embodiment of the present application, a USB TYPE-C TYPE signal transmission line is connected between a device terminal and a display, if the detection unit 100 acquires a power signal from an HDMI TYPE signal transmission line, the controller 400 is activated, first, an attribute of the USB TYPE-C TYPE signal transmission line is acquired through a CC pin, for example, the USB TYPE-C TYPE signal transmission line is a Super Speed attribute, a transmission rate of the USB TYPE-C TYPE signal transmission line is directly acquired through a decoding module, and after the data transmission rate between the device terminal and the display is obtained through control, the controller 400 adjusts 8 capacitance values of the variable capacitance units 300 to a capacitance value of a ground capacitance corresponding to the transmission rate according to the data transmission rate between the device terminal and the display. The effect of reducing the interference generated on the wireless WIFI module of the equipment terminal when high-speed audio and video signals are transmitted between the equipment terminal and the display is achieved.
If the attribute of acquiring the USB TYPE-C TYPE signal transmission line through the CC pin is the HDMI attribute, the rate acquisition unit 200 starts to detect the data transmission rate on the auxiliary signal line in the USB TYPE-C TYPE signal transmission line, and after the data transmission rate between the device terminal and the display is acquired by control, the controller 400 adjusts the capacitance value of the variable capacitance unit 300 to the capacitance value of the ground capacitance corresponding to the transmission rate according to the data transmission rate between the device terminal and the display. The effect of reducing the interference generated on the wireless WIFI module of the equipment terminal when high-speed audio and video signals are transmitted between the equipment terminal and the display is achieved.
If the attribute of the USB TYPE-C TYPE signal transmission line obtained through the CC pin is a DP (Display Port) attribute, the current working mode of the DP signal is obtained through the decoding module, and then the transmission rate of the USB TYPE-C TYPE signal transmission line is obtained, after the data transmission rate between the device terminal and the Display is obtained, the controller 400 adjusts the capacitance values of 8 variable capacitance units 300 to the capacitance value of the ground capacitance corresponding to the transmission rate according to the data transmission rate between the device terminal and the Display. The effect of reducing the interference generated on the wireless WIFI module of the equipment terminal when high-speed audio and video signals are transmitted between the equipment terminal and the display is achieved.
In one example, for example, the RBR (reduce Bit Rate) mode single line Rate is 1.62Gbps, the HBR (High Bit Rate) mode single line Rate is 2.7Gbps, the HBR2(High Bit Rate2) mode single line Rate is 5.4Gbps, and the HBR3(High Bit Rate3) mode single line Rate is 8.1 Gbps. For example, the single line Rate of the HBR3(High Bit Rate3) mode is 8.1Gbps, the controller 400 controls and adjusts the capacitance value of the variable capacitance unit 300, so that the ground capacitance of the variable capacitance unit 300 becomes the capacitance value of the corresponding ground capacitance of 8.1Gbps, therefore, an interference signal generated to the wireless WIFI module when a High-speed audio/video signal is transmitted between the device terminal and the display is transmitted to the ground terminal through the 8 variable capacitance units 300, and an audio data signal between the device terminal and the display is transmitted to the display through the HDMI type signal transmission line, thereby achieving the technical effect of filtering the interference signal, reducing the interference to the wireless WIFI module, and effectively ensuring the wireless working performance of the terminal device.
It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to be limiting. All other embodiments, which can be derived by a person skilled in the art from the examples provided herein without any inventive step, shall fall within the scope of protection of the present application.
It is obvious that the drawings are only examples or embodiments of the present application, and it is obvious to those skilled in the art that the present application can be applied to other similar cases according to the drawings without creative efforts. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
The term "embodiment" is used herein to mean that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly or implicitly understood by one of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the patent protection. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. An anti-jamming circuit for use in a data transmission line comprising a plurality of differential line pairs, each differential line pair comprising two differential lines, comprising: the speed acquisition unit and the variable capacitance units are respectively electrically connected with the controller, each differential line is connected with one end of at least one variable capacitance unit, and the other end of each variable capacitance unit is grounded;
the rate acquiring unit is used for acquiring the data transmission rate of the data transmission line and sending the data transmission rate to the controller;
the controller is configured to determine capacitance values of the plurality of variable capacitance units according to the data transmission rate, and adjust the plurality of variable capacitance units according to the capacitance values.
2. The immunity circuit of claim 1, further comprising a detection unit, said detection unit being electrically connected to said controller;
the detection unit is used for activating the controller under the condition that an external power supply signal is detected;
and the controller controls the rate acquisition unit to acquire the data transmission rate under the condition of being activated.
3. The immunity circuit of claim 2, wherein, in the case that the data transmission line is a bidirectional transmission line, the detection unit is further configured to obtain a data transmission direction in the data transmission line;
the controller is further configured to determine at least one target differential line pair used for data transmission among the plurality of differential line pairs according to the data transmission direction, and adjust the variable capacitance unit connected to the at least one target differential line pair according to the data transmission rate.
4. The immunity circuit of claim 1, wherein the variable capacitance unit comprises a switch array unit and a capacitance array unit, and the capacitance value of the variable capacitance is adjusted by adjusting the on or off of a switch in the switch array unit.
5. The immunity circuit of claim 1, wherein said data transmission line further comprises at least one auxiliary signal line, said at least one auxiliary signal line having a data transmission rate that is lower than a data transmission rate of said differential line;
the rate obtaining unit comprises a decoding module, the decoding module is connected in series in the at least one auxiliary signal line, and the decoding module is used for obtaining the data transmission rate on the at least one auxiliary signal line or determining the transmission rate on the auxiliary signal line according to the resolution of a display connected with the data transmission line.
6. The immunity circuit of claim 5, wherein said auxiliary signal line comprises I2And C, a bus.
7. The immunity circuit of claim 5, wherein said data transmission line further comprises a configuration channel port, said configuration channel port configured to determine a different transmission mode of said data transmission line, said decoding module further configured to obtain a transmission mode of said data transmission line from said configuration channel port and determine said data transmission rate based on a match with said transmission mode.
8. A tamper-resistant data line, characterized in that it comprises a tamper-resistant circuit according to any one of claims 1 to 7.
9. The tamper-resistant data line of claim 8, wherein both ends of the tamper-resistant data line include the tamper-resistant circuit.
10. The data line of claim 9, wherein two controllers of the data line are each provided with a control terminal, and the two control terminals are electrically connected, and when one of the controllers is activated, the activated controller sends a command to the other control terminal through the control terminals to limit the activation of the other controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123339512.5U CN216794162U (en) | 2021-12-27 | 2021-12-27 | Anti-interference circuit and anti-interference data line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123339512.5U CN216794162U (en) | 2021-12-27 | 2021-12-27 | Anti-interference circuit and anti-interference data line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216794162U true CN216794162U (en) | 2022-06-21 |
Family
ID=82011874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123339512.5U Active CN216794162U (en) | 2021-12-27 | 2021-12-27 | Anti-interference circuit and anti-interference data line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216794162U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117075836A (en) * | 2023-10-16 | 2023-11-17 | 合肥联宝信息技术有限公司 | Anti-interference device for display signal, display and electronic equipment |
-
2021
- 2021-12-27 CN CN202123339512.5U patent/CN216794162U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117075836A (en) * | 2023-10-16 | 2023-11-17 | 合肥联宝信息技术有限公司 | Anti-interference device for display signal, display and electronic equipment |
| CN117075836B (en) * | 2023-10-16 | 2024-02-23 | 合肥联宝信息技术有限公司 | Anti-interference device for display signal, display and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10229770B2 (en) | Unified connector for multiple interfaces | |
| CN205844970U (en) | A kind of display terminal with USB Type C interface and display system | |
| CN216794162U (en) | Anti-interference circuit and anti-interference data line | |
| CN103841316A (en) | Data processing apparatus and related data processing method | |
| CN205142391U (en) | Take HDMI signal converter of connecting wire | |
| KR102251671B1 (en) | Apparatus and method for improving quality of transmission signals, and system therefor | |
| CN201654774U (en) | Data transmission equipment based on USB2.0 | |
| EP2991171A1 (en) | Connector, data transmission device, data reception device, and data transmission and reception system | |
| CN103531977B (en) | Data transmission line | |
| CN216451391U (en) | Exchange control device with high reliability and electromagnetic compatibility | |
| US20140009246A1 (en) | Network signal enhancement circuit assembly | |
| CN106209000B (en) | A kind of filtering unit | |
| CN207319794U (en) | A kind of I for strengthening antijamming capability2C buses | |
| TWI763001B (en) | Signal transmission device capable of transmitting multiple data streams | |
| CN209880110U (en) | High-speed signal transmission device between multi-media navigation split host and display screen | |
| CN100508076C (en) | Method for connecting decoupling shielded cable | |
| CN213934702U (en) | VPX integrated circuit board | |
| CN215499316U (en) | HDMI signal acquisition card | |
| CN201628957U (en) | Host and server | |
| CN206226636U (en) | A kind of all-in-one with wireless screen transmission function | |
| CN218482922U (en) | Multimedia AP equipment with 5G function | |
| CN113329272B (en) | Interface board | |
| CN113986810B (en) | System and method for improving I2C communication performance | |
| CN212659050U (en) | KVM system based on centralized switching equipment | |
| CN205376922U (en) | Intelligence USB data charging wire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |