CN200990057Y - Main board protection circuit - Google Patents
Main board protection circuit Download PDFInfo
- Publication number
- CN200990057Y CN200990057Y CN 200620145405 CN200620145405U CN200990057Y CN 200990057 Y CN200990057 Y CN 200990057Y CN 200620145405 CN200620145405 CN 200620145405 CN 200620145405 U CN200620145405 U CN 200620145405U CN 200990057 Y CN200990057 Y CN 200990057Y
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- CN
- China
- Prior art keywords
- circuit
- triode
- processing unit
- central processing
- mainboard
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Abstract
A protection circuit for motherboard is used to protect the motherboard with the CPU not inserted. The protection circuit for motherboard comprises a start switch and a CPU socket circuit; the start switch is provided with an earth terminal and an output terminal that outputs the signal of starting, wherein the earth terminal and the output terminal can be communicated with each other when being actuated; the protection circuit for motherboard further comprises a switching circuit which is connected between the earth terminal and the ground and a control circuit that controls the switching circuit to be turned on and cut off according to the condition that whether the CPU is inserted and connected; one terminal of the control circuit is connected with the CPU socket circuit to monitor whether the CPU is inserted and connected; the other terminal of the control circuit is connected with the switching circuit. The protection circuit for motherboard does not turn on the power supply on the condition that the CPU is not arranged on the motherboard and thus protects the motherboard.
Description
Technical field
The utility model relates to a kind of mainboard holding circuit, particularly about a kind of circuit of protecting the mainboard of Lou having inserted assembly.
Background technology
In the computer main board production run, usually to test the function of computer main board, when testing, need assembling central processing unit and memory bar etc.; Because human factor, when test, sometimes forget at computer main board and assemble central processing unit and the operation of starting shooting, this moment, the input/output port controller of computer can't discern whether assembled central processing unit and turn-on power makes computer main board energising, computer main board top supply voltage is by the central processing unit feedback regulation, it is unstable because do not feed back to make some voltage when not having central processing unit, high pressure may be produced, thereby chip and part on the computer main board may be damaged.
Summary of the invention
In view of above content, be necessary to provide a kind of circuit of Lou inserting the mainboard of central processing unit of protecting.
A kind of mainboard holding circuit; be used to protect the mainboard of Lou plugging in central processing unit; described mainboard holding circuit comprises a start switch and a central processing unit socket circuit; described start switch is provided with the output terminal that the earth terminal and that can connect is mutually exported starting-up signal by start the time; described mainboard holding circuit comprises that also one is connected in the control circuit that the on-off circuit and between described earth terminal and the ground makes described on-off circuit conducting and ends according to the described central processing unit of whether pegging graft; one end of described control circuit connects described central processing unit socket circuit and monitors the described central processing unit of whether pegging graft, and the other end of described control circuit connects described on-off circuit.
Compared to prior art; described mainboard holding circuit has or not the grafting central processing unit to control the earth terminal ground connection of described start switch according to the central processing unit socket circuit; when the central processing unit socket circuit is not pegged graft central processing unit; the earth terminal of described start switch is earth-free and can't start shooting, thereby can protect mainboard.
Description of drawings
The utility model will be further described in conjunction with embodiment with reference to the accompanying drawings.
Fig. 1 is the circuit diagram of the utility model mainboard holding circuit preferred embodiment.
Embodiment
See also Fig. 1, the preferred embodiment of the utility model mainboard holding circuit comprises a start switch 10, an on-off circuit 20, a control circuit 30, a power-supply controller of electric 40 and a central processing unit socket circuit 50.
Described on-off circuit 20 comprises one first on-off element, a resistance R 11, a resistance R 12 and one first stabilized power source V1; In the present embodiment, first on-off element is one first triode Q1; The collector of the first triode Q1 connects the first stabilized power source V1 by resistance R 12, the grounded emitter of the first triode Q1, and resistance R 11 is connected between the emitter and base stage of the first triode Q1, and the base stage of the first triode Q1 connects control circuit 30.
In the present embodiment, the first triode Q1 and the second triode Q2 are NPN type triode.
Below introduce the course of work of this mainboard holding circuit.
When central processing unit is unkitted when placing on the central processing unit socket circuit 50; link 52 makes the second triode Q2 conducting for high level; the grounded collector of the second triode Q2 and be set to low level; the base stage of the first triode Q1 that links to each other with the collector of the second triode Q2 is a low level; the first triode Q1 ends; the earth terminal 11 of start switch 10 is set to high level owing to being connected to the first stabilized power source V1; even start this moment is started shooting switch 10 and is connected earth terminal 11 and output terminal 12; output terminal 12 still is a high level; can't trigger power-supply controller of electric 40; power supply unit 70 can not powered, thereby can't start shooting and mainboard is protected.
When central processing unit is installed on described central processing unit socket circuit 50, link 52 is a low level, the base stage of the second triode Q2 that links to each other with link 52 is that low level is ended the second triode Q2, the current collection of the second triode Q2 that links to each other with the 3rd stabilized power source V3 is high level very, the base stage of the first triode Q1 that links to each other with the collector of the second triode Q2 is a high level, the first triode Q1 conducting, the grounded collector of the first triode Q1 and be set to low level, the earth terminal 11 of the start switch 10 that links to each other with the collector of the first triode Q1 is low level, start this moment is started shooting switch 10 and is connected earth terminal 11 and output terminal 12, output terminal 12 outputs one low level starting-up signal is given power-supply controller of electric 40, power-supply controller of electric 40 makes power supply unit 70 power supplies, thus normal boot-strap.
Claims (8)
1. mainboard holding circuit; be used to protect the mainboard of Lou plugging in central processing unit; described mainboard holding circuit comprises a start switch and a central processing unit socket circuit; described start switch is provided with the output terminal that the earth terminal and that can connect is mutually exported starting-up signal by start the time; it is characterized in that: described mainboard holding circuit comprises that also one is connected in the control circuit that the on-off circuit and between described earth terminal and the ground makes described on-off circuit conducting and ends according to the described central processing unit of whether pegging graft; one end of described control circuit connects described central processing unit socket circuit and monitors the described central processing unit of whether pegging graft, and the other end of described control circuit connects described on-off circuit.
2. mainboard holding circuit as claimed in claim 1; it is characterized in that: described on-off circuit comprises one first triode; the collector of described first triode connects the earth terminal of described start switch; and be connected to one first stabilized power source by a resistance; the emission collection ground connection of described first triode, the base stage of described first triode connects described control circuit.
3. mainboard holding circuit as claimed in claim 2 is characterized in that: a resistance is connected between the emitter and base stage of described first triode.
4. mainboard holding circuit as claimed in claim 1 is characterized in that: described central processing unit socket circuit be provided with one behind the described central processing unit of pegging graft the link of ground connection, described control circuit is connected in described link.
5. mainboard holding circuit as claimed in claim 4; it is characterized in that: described control circuit comprises one second triode; the collector of described second triode connects described on-off circuit; and be connected to one the 3rd stabilized power source by a resistance; the grounded emitter of described second triode; base stage connects the link of described central processing unit socket circuit, and is connected to one the 4th stabilized power source by a resistance.
6. mainboard holding circuit as claimed in claim 5 is characterized in that: a resistance is connected between the emitter and base stage of described second triode.
7. mainboard holding circuit as claimed in claim 1 is characterized in that: the output terminal of described start switch is connected in one second stabilized power source by a resistance.
8. mainboard holding circuit as claimed in claim 7 is characterized in that: the output terminal of described start switch connects an input end of a power-supply controller of electric that can be triggered by low level signal, and an output terminal of described power-supply controller of electric connects a power supply unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620145405 CN200990057Y (en) | 2006-12-29 | 2006-12-29 | Main board protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620145405 CN200990057Y (en) | 2006-12-29 | 2006-12-29 | Main board protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200990057Y true CN200990057Y (en) | 2007-12-12 |
Family
ID=38941093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620145405 Expired - Fee Related CN200990057Y (en) | 2006-12-29 | 2006-12-29 | Main board protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200990057Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105701425A (en) * | 2014-11-28 | 2016-06-22 | 鸿富锦精密工业(武汉)有限公司 | Electronic equipment, and mainboard and protection circuit thereof |
| CN106201758A (en) * | 2016-07-15 | 2016-12-07 | 浪潮电子信息产业股份有限公司 | The method and device that a kind of server node hard disk powers on |
-
2006
- 2006-12-29 CN CN 200620145405 patent/CN200990057Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105701425A (en) * | 2014-11-28 | 2016-06-22 | 鸿富锦精密工业(武汉)有限公司 | Electronic equipment, and mainboard and protection circuit thereof |
| CN105701425B (en) * | 2014-11-28 | 2020-04-28 | 鸿富锦精密工业(武汉)有限公司 | Electronic equipment and mainboard and protection circuit thereof |
| CN106201758A (en) * | 2016-07-15 | 2016-12-07 | 浪潮电子信息产业股份有限公司 | The method and device that a kind of server node hard disk powers on |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: CO-PATENTEE TO: FOXCONN PRECISE INDUSTRY STOCK CO., LTD. ^ |
|
| CU01 | Correction of utility model |
Correction item: Co-patentee Correct: Hon Hai Precision Industry Co Number: 50 Page: The title page Volume: 23 |
|
| CU03 | Publication of corrected utility model |
Correction item: Co-patentee Correct: Hon Hai Precision Industry Co Number: 50 Volume: 23 |
|
| ERR | Gazette correction |
Free format text: CORRECT: CO-PATENTEE; FROM: NONE ^ TO: FOXCONN PRECISE INDUSTRY STOCK CO., LTD. ^ |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071212 Termination date: 20100129 |