CN204028765U - A kind of booting computer circuit - Google Patents
A kind of booting computer circuit Download PDFInfo
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- CN204028765U CN204028765U CN201420471006.2U CN201420471006U CN204028765U CN 204028765 U CN204028765 U CN 204028765U CN 201420471006 U CN201420471006 U CN 201420471006U CN 204028765 U CN204028765 U CN 204028765U
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- circuit
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Abstract
The utility model discloses a kind of booting computer circuit, belong to booting computer circuit engineering field.This boot-strap circuit comprises a RC charge-discharge circuit and a start electrical level output circuit, and described RC charge-discharge circuit is connected with start electrical level output circuit, and this boot-strap circuit also comprises an automatic electrification circuit; Described automatic electrification circuit comprises the first resistance, the second resistance, the 3rd resistance, electric capacity, diode, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor.The utility model can realize automatic turn-on function after computer falls instantaneously, and being convenient to some needs to stand in the teacher that computer taught by magic lantern at a distance and use.
Description
Technical field
The utility model relates to a kind of booting computer circuit, belongs to booting computer circuit engineering field.
Background technology
At present, computer has become people's work and requisite the same equipment in life.Existing booting computer circuit is made up of a RC charge-discharge circuit and a start electrical level output circuit, and during booting computer, start electrical level output circuit can export a level from low to high under the effect of RC charge-discharge circuit, thus is started by computer main board.But, in the process using computer, there is the situation of power supply instant power-down sometimes, because the electric capacity in RC charge-discharge circuit has little time tele-release light in power down instantaneously, therefore when powering on again after power supply instant power-down, start electrical level output circuit cannot export a level from low to high, and this makes computer can not realize Auto Power On after instant power-down, and this needs to stand in computer at a distance by very inconvenient teacher that magic lantern is taught for some.
Summary of the invention
The utility model, for the problem in background technology, proposes a kind of booting computer circuit.
The utility model, for overcoming the above problems, adopts following technical scheme:
A kind of booting computer circuit, comprise a RC charge-discharge circuit and a start electrical level output circuit, described RC charge-discharge circuit is connected with start electrical level output circuit, and this boot-strap circuit also comprises an automatic electrification circuit, described automatic electrification circuit comprises the first resistance, second resistance, 3rd resistance, electric capacity, diode, first metal-oxide-semiconductor and the second metal-oxide-semiconductor, described one end of first resistance is connected with the anode of diode, the negative electrode of diode connects one end of electric capacity and one end of the second resistance respectively, the other end of the second resistance connects the grid of the first metal-oxide-semiconductor and the drain electrode of the second metal-oxide-semiconductor respectively, the grid of the second metal-oxide-semiconductor is connected with one end of the 3rd resistance, the drain electrode of the first metal-oxide-semiconductor is connected with the discharge end of RC charge-discharge circuit, the other end of the first resistance and the other end of the 3rd resistance all access power supply, the other end of electric capacity, the source electrode of the first metal-oxide-semiconductor and the source grounding of the second metal-oxide-semiconductor.
Preferably, described diode adopts schottky diode.
Technique effect:
1, the utility model can realize automatic turn-on function after computer falls instantaneously, and being convenient to some needs to stand in the teacher that computer taught by magic lantern at a distance and use.
2, the utility model is novel, practical function, with low cost, is convenient to promote.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, introduction is in further detail done to the technical solution of the utility model:
As shown in Figure 1, comprise a RC charge-discharge circuit 1 and a start electrical level output circuit 2, described RC charge-discharge circuit 1 is connected with start electrical level output circuit 2 structure of the present utility model, and this boot-strap circuit also comprises an automatic electrification circuit 3, described automatic electrification circuit 3 comprises the first resistance R1, second resistance R2, 3rd resistance R3, electric capacity C1, diode D1, first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2, one end of described first resistance R1 is connected with the anode of diode D1, the negative electrode of diode D1 connects one end of electric capacity C1 and one end of the second resistance R2 respectively, the other end of the second resistance R2 connects the grid of the first metal-oxide-semiconductor Q1 and the drain electrode of the second metal-oxide-semiconductor Q2 respectively, the grid of the second metal-oxide-semiconductor Q2 is connected with one end of the 3rd resistance R3, the drain electrode of the first metal-oxide-semiconductor Q1 is connected with the discharge end of RC charge-discharge circuit 1, the other end of the first resistance R1 and the other end of the 3rd resistance R3 all access power supply, the other end of electric capacity C1, the source electrode of the first metal-oxide-semiconductor Q1 and the source grounding of the second metal-oxide-semiconductor Q2.
Described diode D1 adopts schottky diode, at shutdown transient electric capacity C1, electric current is poured in down a chimney the resistance R1 that wires back for preventing; Described first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 all adopts N-channel MOS pipe.
When normally powering on, electric capacity C1 charges, the grid of metal-oxide-semiconductor Q2 is high level, metal-oxide-semiconductor Q2 conducting, and the grid of metal-oxide-semiconductor Q1 is pulled to low level, metal-oxide-semiconductor Q1 disconnects, therefore, when normally powering on, automatic electrification circuit 3 does not have any impact to RC charge-discharge circuit 1 and start electrical level output circuit 2, start electrical level output circuit 2 exports a level from low to high under the effect of RC charge-discharge circuit 1, detailed process is as follows: when normally powering on, electric capacity C2 starts charging, metal-oxide-semiconductor Q3 disconnects, the grid of metal-oxide-semiconductor Q4 is high level, metal-oxide-semiconductor Q4 conducting, the drain electrode output low level of metal-oxide-semiconductor Q4, after electric capacity C2 charges, metal-oxide-semiconductor Q3 conducting, and the grid of metal-oxide-semiconductor Q4 is pulled to low level, metal-oxide-semiconductor Q4 disconnects, the drain electrode of metal-oxide-semiconductor Q4 exports high level.
When power supply instant power-down, the grid of metal-oxide-semiconductor Q2 is low level, and metal-oxide-semiconductor Q2 disconnects, simultaneously, electric capacity C1 discharges, and the grid of metal-oxide-semiconductor Q1 is high level, metal-oxide-semiconductor Q1 conducting, and by the tele-release light of electric capacity C2, so, when powering on after power supply instant power-down, electric capacity C2 can continue charging again, to ensure that start electrical level output circuit 2 exports a level from low to high under the effect of RC charge-discharge circuit 1, thus realize automatic turn-on function.
Claims (2)
1. a booting computer circuit, comprise a RC charge-discharge circuit (1) and start electrical level output circuit (2), described RC charge-discharge circuit (1) is connected with start electrical level output circuit (2), it is characterized in that: also comprise an automatic electrification circuit (3), described automatic electrification circuit (3) comprises the first resistance (R1), second resistance (R2), 3rd resistance (R3), electric capacity (C1), diode (D1), first metal-oxide-semiconductor (Q1) and the second metal-oxide-semiconductor (Q2), one end of described first resistance (R1) is connected with the anode of diode (D1), the negative electrode of diode (D1) connects one end of electric capacity (C1) and one end of the second resistance (R2) respectively, the other end of the second resistance (R2) connects the grid of the first metal-oxide-semiconductor (Q1) and the drain electrode of the second metal-oxide-semiconductor (Q2) respectively, the grid of the second metal-oxide-semiconductor (Q2) is connected with one end of the 3rd resistance (R3), the drain electrode of the first metal-oxide-semiconductor (Q1) is connected with the discharge end of RC charge-discharge circuit (1), the other end of the first resistance (R1) and the other end of the 3rd resistance (R3) all access power supply, the other end of electric capacity (C1), the source electrode of the first metal-oxide-semiconductor (Q1) and the source grounding of the second metal-oxide-semiconductor (Q2).
2. a kind of booting computer circuit according to claim 1, is characterized in that: described diode (D1) adopts schottky diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420471006.2U CN204028765U (en) | 2014-08-20 | 2014-08-20 | A kind of booting computer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420471006.2U CN204028765U (en) | 2014-08-20 | 2014-08-20 | A kind of booting computer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204028765U true CN204028765U (en) | 2014-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420471006.2U Expired - Fee Related CN204028765U (en) | 2014-08-20 | 2014-08-20 | A kind of booting computer circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204028765U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105700985A (en) * | 2016-01-15 | 2016-06-22 | 合肥联宝信息技术有限公司 | Notebook computer loop test tool |
| CN110928389A (en) * | 2019-11-08 | 2020-03-27 | 山东超越数控电子股份有限公司 | Circuit for automatically starting up loongson mainboard after power-on |
-
2014
- 2014-08-20 CN CN201420471006.2U patent/CN204028765U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105700985A (en) * | 2016-01-15 | 2016-06-22 | 合肥联宝信息技术有限公司 | Notebook computer loop test tool |
| CN110928389A (en) * | 2019-11-08 | 2020-03-27 | 山东超越数控电子股份有限公司 | Circuit for automatically starting up loongson mainboard after power-on |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20170820 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |