CN106253886A - Guard of computer circuit - Google Patents
Guard of computer circuit Download PDFInfo
- Publication number
- CN106253886A CN106253886A CN201610713864.7A CN201610713864A CN106253886A CN 106253886 A CN106253886 A CN 106253886A CN 201610713864 A CN201610713864 A CN 201610713864A CN 106253886 A CN106253886 A CN 106253886A
- Authority
- CN
- China
- Prior art keywords
- threshold comparator
- photoelectrical coupler
- computer
- input end
- resistance
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F17/00—Amplifiers using electroluminescent element or photocell
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manipulation Of Pulses (AREA)
Abstract
The invention discloses a kind of guard of computer circuit, relate to computer equipment manufacturing technology field；There is a photoelectrical coupler, the primary of described photoelectrical coupler is connected with external equipment, the secondary of described photoelectrical coupler is connected with the positive input terminal of threshold comparator, the negative input end of described threshold comparator is connected with the secondary of described photoelectrical coupler by resistance, the negative input end of described threshold comparator is also associated with regulating resistance, being connected with the line of described resistance at the negative input end of described threshold comparator and have electric capacity, the outfan of described threshold comparator is connected with computer.The present invention can solve external equipment affects the problem that computer is properly functioning.
Description
Technical field
The present invention relates to computer equipment manufacturing technology field, a kind of for isolation computer and external equipment
Protection circuit.
Background technology
General computer is unprotected with the connection of external equipment, often makes voltage or the interference subject string of external equipment
Enter in computer, thus affect the properly functioning of computer.
Summary of the invention
It is an object of the invention to provide a kind of guard of computer circuit, it can solve external equipment, and to affect computer normal
The problem run.
In order to solve the problems referred to above, the technical solution used in the present invention is: this guard of computer circuit, has a smooth thermocouple
Clutch, the primary of described photoelectrical coupler is connected with external equipment, and the secondary of described photoelectrical coupler is with threshold comparator just
Input connects, and the negative input end of described threshold comparator is connected with the secondary of described photoelectrical coupler by resistance, described threshold
The negative input end of value comparator is also associated with regulating resistance, at negative input end and the line of described resistance of described threshold comparator
Connecting has electric capacity, the outfan of described threshold comparator to be connected with computer.
Owing to have employed technique scheme, the present invention compared with prior art, has the beneficial effect that the present invention adopts
With photoelectrical coupler as the isolator of computer Yu external equipment, make normal without interference with computer of external equipment interference source
Run.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the present invention.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings:
Guard of computer circuit shown in Fig. 1, has a photoelectrical coupler IC2, and the primary of photoelectrical coupler IC2 is with external equipment even
Connecing, the secondary of photoelectrical coupler IC2 is connected with the positive input terminal of threshold comparator IC1, and the negative input end of threshold comparator IC1 leads to
Crossing the secondary of resistance R1 and photoelectrical coupler IC2 to be connected, the negative input end of threshold comparator IC1 is also associated with regulating resistance R2,
Being connected with the line of resistance R1 at the negative input end of threshold comparator IC1 and have electric capacity C1, resistance R1 and electric capacity C1 forms low pass filtered
Ripple device, stops the false triggering of threshold comparator IC1, and the outfan of threshold comparator IC1 is connected with computer, threshold comparator
The threshold voltage of IC1 is regulated by R2.When external equipment is output as " 0 " state, act on photoelectrical coupler IC2 primary, then light
The secondary conducting of electric coupler IC2, makes threshold comparator IC1 export one state；Otherwise, threshold comparator IC1 output " 0 " state.
Claims (1)
1. a guard of computer circuit, it is characterised in that: there is a photoelectrical coupler (IC2), described photoelectrical coupler (IC2)
Primary is connected with external equipment, and the secondary of described photoelectrical coupler (IC2) is connected with the positive input terminal of threshold comparator (IC1),
The negative input end of described threshold comparator (IC1) is connected with the secondary of described photoelectrical coupler (IC2) by resistance (R1), described
The negative input end of threshold comparator (IC1) is also associated with regulating resistance (R2), at the negative input end of described threshold comparator (IC1)
Being connected with the line of described resistance (R1) and have electric capacity (C1), the outfan of described threshold comparator (IC1) is connected with computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610713864.7A CN106253886A (en) | 2016-08-24 | 2016-08-24 | Guard of computer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610713864.7A CN106253886A (en) | 2016-08-24 | 2016-08-24 | Guard of computer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106253886A true CN106253886A (en) | 2016-12-21 |
Family
ID=57595975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610713864.7A Pending CN106253886A (en) | 2016-08-24 | 2016-08-24 | Guard of computer circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106253886A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5115148A (en) * | 1989-11-02 | 1992-05-19 | Siemens Aktiengesellschaft | Interface between two electrical circuits operated at different operating voltages |
| CN203490693U (en) * | 2013-09-24 | 2014-03-19 | 成都爱信雅克科技有限公司 | Simple computer photoelectric signal transmission interface circuit |
| CN203561685U (en) * | 2013-11-12 | 2014-04-23 | 成都麦客堂信息技术有限公司 | Level detector of computer power supply |
-
2016
- 2016-08-24 CN CN201610713864.7A patent/CN106253886A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5115148A (en) * | 1989-11-02 | 1992-05-19 | Siemens Aktiengesellschaft | Interface between two electrical circuits operated at different operating voltages |
| CN203490693U (en) * | 2013-09-24 | 2014-03-19 | 成都爱信雅克科技有限公司 | Simple computer photoelectric signal transmission interface circuit |
| CN203561685U (en) * | 2013-11-12 | 2014-04-23 | 成都麦客堂信息技术有限公司 | Level detector of computer power supply |
Non-Patent Citations (2)
| Title |
|---|
| 华仔: "计算机光电隔离接口电路图", 《HTTP://TECH.HQEW.COM/CIRCUIT_1408639》 * |
| 张广川，万小松: "《电子电路集第六集》", 28 February 1991, 人民邮电出版社 * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161221 |