CN204480241U - A kind of hub control circuit - Google Patents
A kind of hub control circuit Download PDFInfo
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- CN204480241U CN204480241U CN201520104898.7U CN201520104898U CN204480241U CN 204480241 U CN204480241 U CN 204480241U CN 201520104898 U CN201520104898 U CN 201520104898U CN 204480241 U CN204480241 U CN 204480241U
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Abstract
The utility model discloses a kind of hub control circuit, the computer USB interface unit comprising Master Control Center and be connected with described Master Control Center, some expanding USB interface unit, crystal oscillator unit and some power supply input-output units, and, described Master Control Center is also provided with some power conversion units, and described expanding USB interface unit is also provided with and turns DP1 that serial ports control module is connected with USB and to hold and DM1 holds.The beneficial effects of the utility model: this circuit structure is simple and economical and practical, in circuit, electromagnetic interference (EMI) is less simultaneously, therefore has good stability and antijamming capability, and then makes the usability of hub be able to effective raising.
Description
Technical field
The utility model relates to technical field of circuit control, specifically, relates to a kind of hub control circuit.
Background technology
The major function of hub carries out regeneration shaping to the received signal to amplify with the transmission range expanding network, all nodes concentrated on the node centered by it simultaneously.It works in the ground floor of Open System Interconnection reference model, i.e. " Physical layer ".Hub is the same with the transmission medium such as network interface card, netting twine, belongs to the infrastructure device in LAN (Local Area Network), adopts CSMA/CD(and csma/cd technology) media access control mechanism.The each interface of hub simply receives and dispatches bit, receives 1 and just forwards 1, receives 0 and just forwards 0, do not carry out collision detection.
Therefore, the signal amplifying apparatus of a hub mainly multiport, in work when a port accepts is to data-signal, because signal there has been decay in the transmitting procedure from source port to hub, so this signal is just carried out shaping amplification by hub, make the signal regeneration (recovery) be attenuated to state when sending, be and then forwarded on other all in running order ports.Therefore the performance of its control circuit has great impact to its serviceability.Existing hub control circuit ubiquity the comparatively complicated and problem that in circuit, electromagnetic interference (EMI) is larger of structure, thus makes its operating circuit unstable, therefore makes the usability of hub can not get effective lifting.
For the problem described in above-mentioned correlation technique, at present effective solution is not yet proposed.
Utility model content
For problem above-mentioned in correlation technique, the utility model proposes a kind of hub control circuit, effectively can simplify circuit structure, effectively reduce the electromagnetic interference problem in circuit simultaneously, make hub usability more stable.
For realizing above-mentioned technical purpose, the technical solution of the utility model is achieved in that
A kind of hub control circuit, the computer USB interface unit comprising Master Control Center and be connected with described Master Control Center, some expanding USB interface unit, crystal oscillator unit and some power supply input-output units, wherein, be connected with a crystal oscillator between the crystal oscillator input end of described Master Control Center and crystal oscillator output terminal and form described crystal oscillator unit, the REXT end of described Master Control Center is connected with the first resistance of one end ground connection, described first resistance is also connected with the 4th electric capacity that one end is connected with 3.3V power supply input-output unit, the bus power source indication end of described Master Control Center and external reset end be extraneous the second resistance and the 3rd resistance having a termination 3.3V power supply respectively, described computer USB interface unit comprises the upstream port D+ pin with described Master Control Center, upstream port D-pin and Vbus monitor the USB interface one that upstream port is connected, wherein, described upstream port D+ pin connects the USB data line pin one of described USB interface one, described upstream port D-pin connects the USB data line pin two of described USB interface one, described Vbus monitors that upstream port connects the USB power source pin of described USB interface one, and, the 4th resistance is provided with between described upstream port D+ pin and described USB data line pin one, the 5th resistance is provided with between described upstream port D-pin and described USB data line pin two, described Vbus monitors upstream port and is provided with the 6th resistance and the 7th electric capacity of connecting between described USB power source pin, and, the input end of described 6th resistance is also provided with the 7th resistance in parallel and the 8th electric capacity, some described expanding USB interface unit comprise the USB functional module be connected with described Master Control Center downstream port respectively, wherein, described USB functional module comprises USB interface two, the power end of described USB interface two is connected with 5V power supply, the data line pin one of described USB interface two and data line pin two connect the downstream port of described Master Control Center respectively and are also respectively arranged with the 8th resistance and the 9th resistance between itself and described downstream port, simultaneously, described data line pin one and data line pin two also connect the tenth resistance and the 11 resistance that are equipped with ground connection one end, one end correspondence and connect described Master Control Center downstream port respectively, and, described Master Control Center is also provided with some power conversion units, described expanding USB interface unit is also provided with and turns DP1 that serial ports control module is connected with USB and to hold and DM1 holds.
Further, some described power supply input-output units comprise 5V power supply input-output unit, 3.3V power supply input-output unit and 1.8V power supply input-output unit, wherein, described 1.8V power supply input-output unit is also connected with the first electric capacity, and described 5V power supply input-output unit is parallel with the 5th electric capacity and the 6th electric capacity.
Further, some described power conversion units comprise power conversion unit one and power conversion unit two, and wherein, described power conversion unit one is circumscribed with the second electric capacity, and described power conversion unit two is circumscribed with the 3rd electric capacity.
Further, the power end of described USB interface is also provided with the 9th electric capacity.
Further, the overcurrent indication end of described Master Control Center is parallel with the 12 resistance and the tenth electric capacity, and described tenth electric capacity is also in series with the 11 electric capacity in parallel and the 12 electric capacity.
The beneficial effects of the utility model: this circuit structure is simple and economical and practical, in circuit, electromagnetic interference (EMI) is less simultaneously, therefore has good stability and antijamming capability, and then makes the usability of hub be able to effective raising.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the hub control circuit according to the utility model embodiment.
In figure:
1, Master Control Center; 2, crystal oscillator; 3, the first resistance; 4, the 4th electric capacity; 5, the second resistance; 6, the 3rd resistance; 7, USB interface one; 8, the 4th resistance; 9, the 5th resistance; 10, the 6th resistance; 11, the 7th electric capacity; 12, the 7th resistance; 13, the 8th electric capacity; 14, USB functional module; 15, USB interface two; 16,5V power supply; 17, the 8th resistance; 18, the 9th resistance; 19, the tenth resistance; 20, the 11 resistance; 21, DP1 end; 22, DM1 end; 23, the first electric capacity; 24, the 5th electric capacity; 25, the 6th electric capacity; 26, the second electric capacity; 27, the 3rd electric capacity; 28, the 9th electric capacity; 29, the 12 resistance; 30, the tenth electric capacity; 31, the 11 electric capacity; 32, the 12 electric capacity.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain, all belongs to the scope of the utility model protection.
As shown in Figure 1, a kind of hub control circuit according to embodiment of the present utility model, the computer USB interface unit comprising Master Control Center 1 and be connected with described Master Control Center 1, some expanding USB interface unit, crystal oscillator unit and some power supply input-output units, wherein, be connected with a crystal oscillator 2 between the crystal oscillator input end of described Master Control Center 1 and crystal oscillator output terminal and form described crystal oscillator unit, the REXT end of described Master Control Center 1 is connected with the first resistance 3 of one end ground connection, described first resistance 3 is also connected with the 4th electric capacity 4 that one end is connected with 3.3V power supply input-output unit, the bus power source indication end of described Master Control Center 1 and external reset end be extraneous the second resistance 5 and the 3rd resistance 6 having a termination 3.3V power supply respectively, described computer USB interface unit comprises the upstream port D+ pin with described Master Control Center 1, upstream port D-pin and Vbus monitor the USB interface 1 that upstream port is connected, wherein, described upstream port D+ pin connects the USB data line pin one of described USB interface 1, described upstream port D-pin connects the USB data line pin two of described USB interface 1, described Vbus monitors that upstream port connects the USB power source pin of described USB interface 1, and, the 4th resistance 8 is provided with between described upstream port D+ pin and described USB data line pin one, the 5th resistance 9 is provided with between described upstream port D-pin and described USB data line pin two, described Vbus monitors upstream port and is provided with the 6th resistance 10 and the 7th electric capacity 11 of connecting between described USB power source pin, and, the input end of described 6th resistance 10 is also provided with the 7th resistance 12 in parallel and the 8th electric capacity 13, some described expanding USB interface unit comprise the USB functional module 14 be connected with described Master Control Center 1 downstream port respectively, wherein, described USB functional module 14 comprises USB interface 2 15, the power end of described USB interface 2 15 is connected with 5V power supply 16, the data line pin one of described USB interface 2 15 and data line pin two connect the downstream port of described Master Control Center 1 respectively and are also respectively arranged with the 8th resistance 17 and the 9th resistance 18 between itself and corresponding described downstream port, simultaneously, described data line pin one and data line pin two are also connected to the tenth resistance the 19 and the 11 resistance 20 that ground connection one end, one end correspondence connects described Master Control Center 1 downstream port, and, described Master Control Center 1 is also provided with some power conversion units, described expanding USB interface unit be also provided with to turn with USB DP1 that serial ports control module is connected hold 21 and DM1 hold 22.
In addition, in a specific embodiment, some described power supply input-output units comprise 5V power supply input-output unit, 3.3V power supply input-output unit and 1.8V power supply input-output unit, wherein, described 1.8V power supply input-output unit is also connected with the first electric capacity 23, and described 5V power supply input-output unit is parallel with the 5th electric capacity 24 and the 6th electric capacity 25.
In addition, in a specific embodiment, some described power conversion units comprise power conversion unit one and power conversion unit two, and wherein, described power conversion unit one is circumscribed with the second electric capacity 26, and described power conversion unit two is circumscribed with the 3rd electric capacity 27.
In addition, in a specific embodiment, the power end of described USB interface 1 is also provided with the 9th electric capacity 28.
In addition, in a specific embodiment, the overcurrent indication end of described Master Control Center 1 is parallel with the 12 resistance 29 and the tenth electric capacity 30, and described tenth electric capacity 30 is also in series with the 11 electric capacity the 31 and the 12 electric capacity 32 in parallel.
Conveniently understand technique scheme of the present utility model, below by way of in concrete use-pattern, technique scheme of the present utility model is described in detail.
When specifically using, DM1 port, DP1 port and USB turn serial ports control module and are connected, for realizing the communication between host computer, be usb expansion interface unit by Master Control Center by computer USB interface unit extensions simultaneously, thus effectively add the USB interface number of work, thus multiple USB interface can be realized and host computer carries out communication.And then effectively improve the usability of hub control circuit.And this circuit structure is simple, cheap, there is very high economy.
In sum, this circuit structure is simple and economical and practical, and in circuit, electromagnetic interference (EMI) is less simultaneously, therefore has good stability and antijamming capability, and then makes the usability of hub be able to effective raising.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. a hub control circuit, it is characterized in that, the computer USB interface unit comprising Master Control Center (1) and be connected with described Master Control Center (1), some expanding USB interface unit, crystal oscillator unit and some power supply input-output units, wherein, be connected with a crystal oscillator (2) between the crystal oscillator input end of described Master Control Center (1) and crystal oscillator output terminal and form described crystal oscillator unit, the REXT end of described Master Control Center (1) is connected with first resistance (3) of one end ground connection, described first resistance (3) is also connected with the 4th electric capacity (4) that one end is connected with 3.3V power supply input-output unit, the bus power source indication end of described Master Control Center (1) and external reset end be extraneous the second resistance (5) and the 3rd resistance (6) having a termination 3.3V power supply respectively, described computer USB interface unit comprises the upstream port D+ pin with described Master Control Center (1), upstream port D-pin and V
busmonitor the USB interface one (7) that upstream port is connected, wherein, described upstream port D+ pin connects the USB data line pin one of described USB interface one (7), described upstream port D-pin connects described USB interface one (7) USB data line pin two, described V
busmonitor that upstream port connects the USB power source pin of described USB interface one (7), and, the 4th resistance (8) is provided with between described upstream port D+ pin and described USB data line pin one, the 5th resistance (9) is provided with, described V between described upstream port D-pin and described USB data line pin two
busmonitor upstream port and between described USB power source pin, be provided with the 6th resistance (10) and the 7th electric capacity (11) of connecting, and, the input end of described 6th resistance (10) is also provided with the 7th resistance (12) in parallel and the 8th electric capacity (13), some described expanding USB interface unit comprise the USB functional module (14) be connected with described Master Control Center (1) downstream port respectively, wherein, described USB functional module (14) comprises USB interface two (15), the power end of described USB interface two (15) is connected with 5V power supply (16), the data line pin one of described USB interface two (15) and data line pin two connect the downstream port of described Master Control Center (1) respectively and are also respectively arranged with the 8th resistance (17) and the 9th resistance (18) between itself and corresponding described downstream port, simultaneously, described data line pin one and data line pin two are also connected to the tenth resistance (19) and the 11 resistance (20) that ground connection one end, one end correspondence connects described Master Control Center (1) downstream port, and, described Master Control Center (1) is also provided with some power conversion units, described expanding USB interface unit is also provided with and turns the DP1 that serial ports control module is connected with USB and hold (21) and DM1 to hold (22).
2. hub control circuit according to claim 1, it is characterized in that, some described power supply input-output units comprise 5V power supply input-output unit, 3.3V power supply input-output unit and 1.8V power supply input-output unit, wherein, described 1.8V power supply input-output unit is also connected with the first electric capacity (23), and described 5V power supply input-output unit is parallel with the 5th electric capacity (24) and the 6th electric capacity (25).
3. hub control circuit according to claim 1, it is characterized in that, some described power conversion units comprise power conversion unit one and power conversion unit two, wherein, described power conversion unit one is circumscribed with the second electric capacity (26), and described power conversion unit two is circumscribed with the 3rd electric capacity (27).
4. hub control circuit according to claim 1, is characterized in that, the power end of described USB interface one (7) is also provided with the 9th electric capacity (28).
5. hub control circuit according to claim 1, it is characterized in that, the overcurrent indication end of described Master Control Center (1) is parallel with the 12 resistance (29) and the tenth electric capacity (30), further, described tenth electric capacity (30) is also in series with the 11 electric capacity (31) in parallel and the 12 electric capacity (32).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520104898.7U CN204480241U (en) | 2015-02-12 | 2015-02-12 | A kind of hub control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520104898.7U CN204480241U (en) | 2015-02-12 | 2015-02-12 | A kind of hub control circuit |
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| CN204480241U true CN204480241U (en) | 2015-07-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104657315A (en) * | 2015-02-12 | 2015-05-27 | 北京惠朗时代科技有限公司 | Control circuit of hub |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104657315A (en) * | 2015-02-12 | 2015-05-27 | 北京惠朗时代科技有限公司 | Control circuit of hub |
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