CN208608987U - Communication module based on the channel USB - Google Patents
Communication module based on the channel USB Download PDFInfo
- Publication number
- CN208608987U CN208608987U CN201821539981.7U CN201821539981U CN208608987U CN 208608987 U CN208608987 U CN 208608987U CN 201821539981 U CN201821539981 U CN 201821539981U CN 208608987 U CN208608987 U CN 208608987U
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- Prior art keywords
- usb
- communication
- filter circuit
- module
- capacitor
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Abstract
The utility model relates to fields of communication technology, the utility model is to solve the problems, such as how to eliminate communication module electromagnetic interference signal, it is proposed a kind of communication module based on the channel USB, including control module and communication chip, the control module is connect by USB with communication chip, it further include the filter circuit for being set to USB transmission line road, the filter circuit includes first resistor, second resistance, first capacitor and the second capacitor, by increasing RC filter circuit on USB outlet line, RC filter circuit strong interference immunity, there is preferable low frequency performance, electromagnetic interference signal on USB outlet line can effectively be inhibited, achieve the effect that improve communication module receiving sensitivity, to improve data transfer distance, suitable for bluetooth module or WIFI module based on USB transmission.
Description
Technical field
The utility model relates to fields of communication technology, relate in particular to a kind of communication module.
Background technique
Bluetooth and WiFi technology are widely used in various electronic equipments at present, many electronic equipments need through bluetooth or
WIFI realizes communication, and controller by the channel USB controls Bluetooth chip or when WIFI chip data transmission, since it is by interior
The influence of portion's power circuit, the channel USB, which controls signal transmssion line road, can generate many electromagnetic interference signals influence data
Receiving sensitivity, to influence the data transmission distance of communication module.
Utility model content
The purpose of this utility model is to solve the problems, such as how to eliminate communication module electromagnetic interference signal, proposes a kind of base
Communication module in the channel USB.
The utility model solves technical solution used by above-mentioned technical problem: the communication module based on the channel USB, packet
Control module and communication chip are included, the control module is connect by the channel USB with communication chip, and the channel USB includes
USB_DP route and USB_DM route, further include the filter circuit being set on the channel USB, and the filter circuit includes the first electricity
Resistance, second resistance, first capacitor and the second capacitor, the first resistor are connected with USB_DP route, the second resistance with
The series connection of USB_DM route, one end of the first capacitor and USB_DM connection, the other end are connect with one end of the second capacitor
And it is grounded, the other end and USB_DP connection of the second capacitor.
Further, further to inhibit to interference signal, the filter circuit is defeated close to the data of communication module
Outgoing interface.
Specifically, being save the cost, the communication module is bluetooth module or WIFI module；
The communication chip is Bluetooth chip or WIFI chip.
The beneficial effects of the utility model are: the communication module described in the utility model based on the channel USB, by
Increase RC filter circuit on the channel USB, RC filter circuit strong interference immunity has preferable low frequency performance, can be on the channel USB
Electromagnetic interference signal effectively inhibited, achieve the effect that improve communication module receiving sensitivity, thus improve data transfer
Distance, and cost is relatively low.
Detailed description of the invention
Fig. 1 is the electrical block diagram of the communication module described in the utility model based on the channel USB；
Description of symbols:
R1- first resistor；R2- second resistance；C1- first capacitor；The second capacitor of C2-.
Specific embodiment
The embodiments of the present invention is described in detail below in conjunction with attached drawing.
Communication module described in the utility model based on the channel USB, as shown in Figure 1, including control module and communication core
Piece, the control module are connect by the channel USB with communication chip, and the channel USB includes USB_DP route and USB_DM line
Road, further includes the filter circuit being set on the channel USB, and the filter circuit includes first resistor R1, second resistance R2, first
Capacitor C1 and the second capacitor C2, the first resistor R1 connect with USB_DP route, the second resistance C2 and USB_DM route
Series connection, one end of the first capacitor C1 and USB_DM connection, one end connect and ground of the other end and the second capacitor C2,
The other end and USB_DP connection of second capacitor C2, control module is connect by the channel USB with communication chip, to control
Communication chip completes the transmission of data, includes USB_DP route and USB_DM route, USB_DP route (USB in the channel USB
Data plus) indicate that data line D+, the USB_DM route (USB data minus) of USB indicates the data line D- of USB, in USB
Series filtering resistance and parallel filtering capacitor on data line and D+ and data line D- carry out the frequency that cutoff frequency is higher than useful signal
Signal, realize effective inhibition to electromagnetic interference, in a particular application, pass through the reception spirit that test mould group tests communication module
Sensitivity, so that it is determined that the choosing value of filter resistance and filter capacitor in filter circuit, the parameter of filter circuit is according to the actual situation
It selects.
Preferably, for the filter circuit close to the data output interface of communication module, communication module generally passes through USB
Connector transmits data, suppression of the filter circuit closer to USB connector, to interference signal as data output interface
Effect processed is better.
Preferably, the communication module is bluetooth module or WIFI module, and the communication chip is Bluetooth chip or WIFI
Chip, bluetooth module and WIFI module are the most commonly used communication modules, on increasing in bluetooth module or WIFI module
Filter circuit is stated, the data transmission distance of bluetooth module or WIFI module can be improved under the premise of lower cost.
Claims (3)
1. based on the communication module in the channel USB, including control module and communication chip, the control module by the channel USB with
Communication chip connection, the channel USB includes USB_DP route and USB_DM route, which is characterized in that further includes being set to USB
Filter circuit on channel, the filter circuit include first resistor, second resistance, first capacitor and the second capacitor, and described
One resistance is connected with USB_DP route, and the second resistance is connected with USB_DM route, one end of the first capacitor and USB_
One end connect and ground of DM connection, the other end and the second capacitor, the other end and USB_DP connection of the second capacitor.
2. the communication module as described in claim 1 based on the channel USB, which is characterized in that the filter circuit is close to communication
The data output interface of module.
3. the communication module as described in claim 1 based on the channel USB, which is characterized in that the communication module is bluetooth mould
Block or WIFI module；
The communication chip is Bluetooth chip or WIFI chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821539981.7U CN208608987U (en) | 2018-09-19 | 2018-09-19 | Communication module based on the channel USB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821539981.7U CN208608987U (en) | 2018-09-19 | 2018-09-19 | Communication module based on the channel USB |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208608987U true CN208608987U (en) | 2019-03-15 |
Family
ID=65681111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821539981.7U Active CN208608987U (en) | 2018-09-19 | 2018-09-19 | Communication module based on the channel USB |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208608987U (en) |
-
2018
- 2018-09-19 CN CN201821539981.7U patent/CN208608987U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | "change of name, title or address" | ||
| CP03 | "change of name, title or address" |
Address after: 621000 Sichuan Ailian Technology Co., Ltd Patentee after: Sichuan Ailian Technology Co., Ltd Address before: 621000 Mianyang city of Sichuan Province, Sichuan Industrial Park, love science and Technology Co. Patentee before: SICHUAN AI-LINK TECHNOLOGY Co.,Ltd. |