CN105391657A - Anti-interference apparatus of series signal and network equipment - Google Patents
Anti-interference apparatus of series signal and network equipment Download PDFInfo
- Publication number
- CN105391657A CN105391657A CN201510759462.6A CN201510759462A CN105391657A CN 105391657 A CN105391657 A CN 105391657A CN 201510759462 A CN201510759462 A CN 201510759462A CN 105391657 A CN105391657 A CN 105391657A
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- China
- Prior art keywords
- serial interface
- resistance
- interface signal
- jamming
- amplifying unit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/10—Packet switching elements characterised by the switching fabric construction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/30—Peripheral units, e.g. input or output ports
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
The invention provides an anti-interference apparatus of a series signal and network equipment. The anti-interference apparatus comprises an amplification unit and a feedback unit. The amplification unit is used for carrying out amplification processing on an inputted series signal to generate an output signal; and the feedback signal connected to the output terminal of the amplification unit is used for feeding back the output signal to a control terminal of the amplification unit. According to the anti-interference apparatus and the network equipment, the amplification unit carries out amplification processing on the inputted series signal, thereby improving the anti-interference performance of the series signal. Besides, the feedback unit carries out feeding back on the outputted signal, thereby enhancing stability of the outputted signal.
Description
Technical field
The present invention relates to electronic circuit technology field, particularly relate to a kind of means for anti-jamming and the network equipment of rs 232 serial interface signal.
Background technology
Along with the develop rapidly of the communication technology, increasing enterprise needs to use switch.Can webmaster type switch except functional area, general also have serial ports and management network port.Wherein, serial ports is the interface that single plate hardware is debugged and positioning problems is the most frequently used, the most basic, is also the most frequently used debugging interface.Serial port data line generally receives serial ports pin corresponding to CPU on pcb board.
The CPU rs 232 serial interface signal of switch is Transistor-Transistor Logic level, from the serial ports pin of CPU out after, possibly through long-distance transmissions, just can receive on the corresponding pin of TTL-RS232 level transferring chip.
Existing technology is directly added in serial port chip by the rs 232 serial interface signal of CPU, therebetween without any signal transacting and safeguard measure.The area of present enterprise network exchanger circuit plate is general all larger, and the transmission range of rs 232 serial interface signal line is distant, and the environment in switch chassis is comparatively severe, and make serial data be vulnerable to interference, the data of transmission likely can be made mistakes.
Therefore, the interference free performance how improving signal just becomes one of those skilled in the art's problem demanding prompt solution.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of means for anti-jamming and the network equipment of rs 232 serial interface signal, for solving the problem of rs 232 serial interface signal poor anti jamming capability in prior art.
For achieving the above object and other relevant objects, the invention provides a kind of means for anti-jamming of rs 232 serial interface signal, the means for anti-jamming of described rs 232 serial interface signal comprises: amplifying unit, processes for carrying out to the rs 232 serial interface signal of input amplifications with generating output signal; Feedback unit, is connected to the output of described amplifying unit, for described output signal being fed back to the control end of amplifying unit.
In one embodiment of the invention, described amplifying unit comprises integrated operational amplifier, and the in-phase input end of described integrated operational amplifier is for receiving described rs 232 serial interface signal; The inverting input of described integrated operational amplifier, as the control end of described amplifying unit, connects described feedback unit.
In one embodiment of the invention, described amplifying unit also comprises: the first resistance, and the first end of described first resistance is for receiving described rs 232 serial interface signal, and the second end of described first resistance connects the in-phase input end of described integrated operational amplifier.
In one embodiment of the invention, described feedback unit comprises: the second resistance and the 3rd resistance; The first end of described second resistance connects the output of described amplifying unit, and the second end of described second resistance connects the described first end of the 3rd resistance and the control end of described amplifying unit; Second end ground connection of described 3rd resistance.
In one embodiment of the invention, the resistance of described second resistance and described 3rd resistance is all adjustable.
In one embodiment of the invention, described rs 232 serial interface signal is Transistor-Transistor Logic level signal.
The invention provides a kind of network equipment, the described network equipment comprises the means for anti-jamming of the rs 232 serial interface signal as described in aforementioned any one.
In one embodiment of the invention, the described network equipment is switch.
As mentioned above, the means for anti-jamming of rs 232 serial interface signal of the present invention and the network equipment, have following beneficial effect:
The means for anti-jamming of rs 232 serial interface signal of the present invention carries out amplification process, to improve its interference free performance to rs 232 serial interface signal; Further, by feedback unit, the output signal after amplifying is fed back, thus improves stability and the reliability of device.
Accompanying drawing explanation
Fig. 1 is shown as the circuit diagram of the means for anti-jamming of rs 232 serial interface signal of the present invention.
Element numbers explanation
11 amplifying units
12 feedback units
U1 integrated operational amplifier
R1 first resistance
R2 second resistance
R3 the 3rd resistance
GND ground
Embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this specification can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this specification also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.It should be noted that, when not conflicting, the feature in following examples and embodiment can combine mutually.
It should be noted that, the diagram provided in following examples only illustrates basic conception of the present invention in a schematic way, then only the assembly relevant with the present invention is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
Refer to Fig. 1, the invention provides a kind of means for anti-jamming of rs 232 serial interface signal, the means for anti-jamming of described rs 232 serial interface signal comprises:
Amplifying unit 11, for carrying out amplification process with generating output signal to the rs 232 serial interface signal of input;
Feedback unit 12, is connected to the output of described amplifying unit, for described output signal being fed back to the control end of amplifying unit.
In the present embodiment, described amplifying unit 11 comprises integrated operational amplifier U1, and the in-phase input end P of described integrated operational amplifier U1 is for receiving described rs 232 serial interface signal; The inverting input N of described integrated operational amplifier U1, as the control end of described amplifying unit 11, connects described feedback unit 12.
In the present embodiment, described amplifying unit 11 also comprises: the first resistance R1, and the first end of described first resistance R1 is for receiving described rs 232 serial interface signal, and second end of described first resistance R1 connects the in-phase input end P of described integrated operational amplifier U1.
In the present embodiment, described feedback unit 12 comprises: the second resistance R2 and the 3rd resistance R3; The first end of described second resistance R2 connects the output OUT of described amplifying unit 11, and second end of described second resistance R2 connects the described first end of the 3rd resistance R3 and the control end of described amplifying unit 11; The second end ground connection GND of described 3rd resistance R3.
In the present embodiment, described rs 232 serial interface signal is Transistor-Transistor Logic level signal; Namely the signal that the input IN of described amplifying unit 11 receives is TTL signal; After the amplifying unit and feedback unit of the present embodiment, rs 232 serial interface signal is converted to the stronger level of antijamming capability.
The means for anti-jamming of the rs 232 serial interface signal of the present embodiment, is amplified signal by operational amplifier, and by after the feedback of R2 and R3, can obtain stable output signal, thus extends the transmission range of rs 232 serial interface signal.
In the present embodiment, the resistance of described second resistance R2 and described 3rd resistance R3 is all adjustable.The level magnitudes of rs 232 serial interface signal after the means for anti-jamming conversion of the rs 232 serial interface signal of the present embodiment by feedback network in the resistance of the second resistance R2 and the 3rd resistance R3 determine.That is, Vo=(1+R2/R1) Vi; Wherein, Vo represents the magnitude of voltage that the output of amplifying unit 11 exports, and Vi represents the magnitude of voltage of the rs 232 serial interface signal that amplifying unit 11 receives.In actual applications, according to actual needs, by adjusting the resistance of R2 and R3, suitable rs 232 serial interface signal amplitude can be obtained.Rs 232 serial interface signal level magnitudes is determined by the resistance of feedback network, has larger flexibility.
The present invention also provides a kind of network equipment, and the described network equipment comprises the means for anti-jamming of aforesaid rs 232 serial interface signal.In the present embodiment, the described network equipment is switch.Certainly, the described network equipment can also be other equipment, and it should not be limited to switch device.
In sum, the means for anti-jamming of rs 232 serial interface signal of the present invention and the network equipment not only substantially increase the antijamming capability of rs 232 serial interface signal but also extend rs 232 serial interface signal transmission range, can also regulate the signal exported according to actual needs simultaneously, thus improve the flexibility of output signal.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (8)
1. a means for anti-jamming for rs 232 serial interface signal, is characterized in that, the means for anti-jamming of described rs 232 serial interface signal comprises:
Amplifying unit, for carrying out amplification process with generating output signal to the rs 232 serial interface signal of input;
Feedback unit, is connected to the output of described amplifying unit, for described output signal being fed back to the control end of amplifying unit.
2. the means for anti-jamming of rs 232 serial interface signal according to claim 1, is characterized in that: described amplifying unit comprises integrated operational amplifier, and the in-phase input end of described integrated operational amplifier is for receiving described rs 232 serial interface signal; The inverting input of described integrated operational amplifier, as the control end of described amplifying unit, connects described feedback unit.
3. the means for anti-jamming of rs 232 serial interface signal according to claim 2, it is characterized in that: described amplifying unit also comprises: the first resistance, the first end of described first resistance is for receiving described rs 232 serial interface signal, and the second end of described first resistance connects the in-phase input end of described integrated operational amplifier.
4. the means for anti-jamming of rs 232 serial interface signal according to claim 1, is characterized in that: described feedback unit comprises: the second resistance and the 3rd resistance; The first end of described second resistance connects the output of described amplifying unit, and the second end of described second resistance connects the described first end of the 3rd resistance and the control end of described amplifying unit; Second end ground connection of described 3rd resistance.
5. the means for anti-jamming of rs 232 serial interface signal according to claim 4, is characterized in that: the resistance of described second resistance and described 3rd resistance is all adjustable.
6. the means for anti-jamming of rs 232 serial interface signal according to claim 1, is characterized in that: described rs 232 serial interface signal is Transistor-Transistor Logic level signal.
7. a network equipment, is characterized in that: the described network equipment comprises the means for anti-jamming of the rs 232 serial interface signal according to any one of claim 1-6.
8. the network equipment according to claim 7, is characterized in that, the described network equipment is switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510759462.6A CN105391657A (en) | 2015-11-09 | 2015-11-09 | Anti-interference apparatus of series signal and network equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510759462.6A CN105391657A (en) | 2015-11-09 | 2015-11-09 | Anti-interference apparatus of series signal and network equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105391657A true CN105391657A (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510759462.6A Pending CN105391657A (en) | 2015-11-09 | 2015-11-09 | Anti-interference apparatus of series signal and network equipment |
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| CN202014233U (en) * | 2010-12-24 | 2011-10-19 | 海信（山东）空调有限公司 | Digital signal communication circuit and air conditioner equipped therewith |
| CN102590649A (en) * | 2011-09-28 | 2012-07-18 | 上海久创电气自动化设备有限公司 | Low-voltage detection system and method |
| CN202710054U (en) * | 2012-06-18 | 2013-01-30 | 北京空间机电研究所 | Signal processing circuit for space remote sensing camera |
| CN204556716U (en) * | 2015-02-02 | 2015-08-12 | 国家电网公司 | A kind of heavy current electrokinetic cell high precision collecting system |
| CN104837235A (en) * | 2014-02-11 | 2015-08-12 | 马跃 | Serial port protecting circuit of LED display screen control card |
| CN104901677A (en) * | 2014-03-05 | 2015-09-09 | 北京兆易创新科技股份有限公司 | Input-output interface device and chip system |
-
2015
- 2015-11-09 CN CN201510759462.6A patent/CN105391657A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202014233U (en) * | 2010-12-24 | 2011-10-19 | 海信（山东）空调有限公司 | Digital signal communication circuit and air conditioner equipped therewith |
| CN102590649A (en) * | 2011-09-28 | 2012-07-18 | 上海久创电气自动化设备有限公司 | Low-voltage detection system and method |
| CN202710054U (en) * | 2012-06-18 | 2013-01-30 | 北京空间机电研究所 | Signal processing circuit for space remote sensing camera |
| CN104837235A (en) * | 2014-02-11 | 2015-08-12 | 马跃 | Serial port protecting circuit of LED display screen control card |
| CN104901677A (en) * | 2014-03-05 | 2015-09-09 | 北京兆易创新科技股份有限公司 | Input-output interface device and chip system |
| CN204556716U (en) * | 2015-02-02 | 2015-08-12 | 国家电网公司 | A kind of heavy current electrokinetic cell high precision collecting system |
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Application publication date: 20160309 |
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