CN104820486A - Computer start circuit capable of preventing parameter missing - Google Patents
Computer start circuit capable of preventing parameter missing Download PDFInfo
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- CN104820486A CN104820486A CN201510215986.9A CN201510215986A CN104820486A CN 104820486 A CN104820486 A CN 104820486A CN 201510215986 A CN201510215986 A CN 201510215986A CN 104820486 A CN104820486 A CN 104820486A
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- resistance
- power supply
- diode
- resistor
- trigger circuit
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Abstract
The invention discloses a computer start circuit capable of preventing parameter missing, which relates to the technical field of computer start circuits. The computer start circuit is characterized in that a power button is respectively connected to an input end of a trigger circuit and one end of a first resistor, and the other end of the first resistor is respectively connected to an input end of a voltage stabilizer and a pin 9 of an ATX (Advanced Technology Extended) power supply; an output end of the voltage stabilizer is connected to a first input end of the trigger circuit, an output end of the trigger circuit is connected to a base of a triode through a second resistor, and a collector of the triode is connected to a pin 14 of the ATX power supply; an anode of a first diode is connected to the pin 9 of the ATX power supply through a fifth resistor, a cathode of the first diode is connected to a cathode of a second diode in parallel and is connected to a parallel end of a third resistor and a fourth resistor, and the anode of the second diode is connected to an anode of a battery through a sixth resistor; the other end of the third resistor is connected to a memory, and the other end of the fourth resistor is connected to an oscillator. The computer start circuit solves the problem of parameter missing of a computer due to instant power down of the power supply.
Description
Technical field
The present invention relates to booting computer circuit engineering field; Especially the booting computer circuit that the anti-parameter that a kind of South Bridge chip controls is lost.
Background technology
Along with popularizing of computer, people more and more be unable to do without computer, and no matter be life or work, computer has become the requisite a kind of instrument of people.Existing booting computer circuit is made up of a RC charge-discharge circuit and a start electrical level output circuit, 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 storer has little time parameter to store in power down instantaneously, therefore can cause the loss of parameter when power supply instant power-down.
Summary of the invention
The object of this invention is to provide the booting computer circuit that a kind of anti-parameter is lost, it can solve existing computer causes the loss of parameter problem when power supply instant power-down.
In order to solve the problem, the technical solution used in the present invention is: the booting computer circuit that this anti-parameter is lost, and comprises key, ATX power supply and the South Bridge chip be made up of trigger circuit, oscillator and storer; Described key enters to hold with the second end of described trigger circuit respectively and one end of the first resistance is connected, and the other end of described first resistance is connected with the input end of voltage stabilizer and the 9th pin of described ATX power supply respectively; The output terminal of described voltage stabilizer is connected with the first input end of described trigger circuit, and the output terminal of described trigger circuit is connected with the base stage of triode by the second resistance, and the collector of described triode is connected with the 14th pin of described ATX power supply; First diode cathode is connected with the 9th pin of described ATX power supply by the 5th resistance, the negative pole of its negative pole and the second diode is in parallel and is connected with the parallel connected end of the 3rd resistance and the 4th resistance, and the positive pole of described second diode passes through the 6th resistance and is connected with the positive pole of battery; The other end of described 3rd resistance is connected with described storer, and the other end of described 4th resistance is connected with described oscillator.
In technique scheme, more specifically scheme can also be: described voltage stabilizer is 1117 low pressure difference linear voltage regulators.
Owing to have employed technique scheme, compared with prior art, the beneficial effect had is in the present invention:
Owing to being the boot-strap circuit that South Bridge chip controls, be provided with the first diode and the second diode, when there is power supply instant power-down, storer provides power supply by battery through the second diode, so the problem that there will not be memory parameter to lose.
Accompanying drawing explanation
Fig. 1 is circuit theory schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
The booting computer circuit that anti-parameter shown in Fig. 1 is lost, comprise the South Bridge chip be made up of trigger circuit 2-1, oscillator 2-2 and storer CMOS, key 1 and ATX power supply 5, key 1 enters to hold with second end of trigger circuit 2-1 respectively and one end of the first resistance R1 is connected, and the other end of the first resistance R1 is connected with the input end of 1117 low pressure difference linear voltage regulators 4 and the 9th pin of ATX power supply 5 respectively; The output terminal of 1117 low pressure difference linear voltage regulators 4 is connected with the first input end of trigger circuit 2-1, and the output terminal of trigger circuit 2-1 is connected with the base stage of triode T by the second resistance R2, and the collector of triode T is connected with the 14th pin of ATX power supply 5; First diode D1 positive pole is connected with the 9th pin of ATX power supply 5 by the 5th resistance R5, the negative pole of its negative pole and the second diode D2 is in parallel and is connected with the parallel connected end of the 3rd resistance R3 and the 4th resistance R4, and the positive pole of the second diode D2 passes through the 6th resistance R6 and is connected with the positive pole of battery; The other end of the 3rd resistance R3 is connected with storer CMOS, and the other end of the 4th resistance R4 is connected with oscillator 2-2.
If key 1 and second end of trigger circuit 2-1 enter to hold and the junction, one end of the first resistance R1 is A point, the contact place of trigger circuit 2-1 and the second resistance R2 is B point.After ATX power supply connects civil power, although power supply is not activated, the 9th pin has the voltage output of 5 volts, is referred to as V Standby.5 volts of V Standbies, after 1117 low pressure difference linear voltage regulators 4, export the voltage supply trigger circuit 2-1 of 3.3 volts.In addition, 5 volts of V Standbies are added to one end of key 1 through the first resistance R1.Press key 1, A point voltage during start to be dragged down, a trigger pip will be produced like this and be input in trigger circuit 2-1.Trigger circuit 2-1 is from B point output logic high, and make triode ON between the emitter junction that this high level is added in triode T, thus the current potential of collector is dragged down, namely such ATX power supply 5 starts working, and exports each group of voltage supply mainboard.
Press key 1, A point voltage during shutdown to be dragged down, a trigger pip will be produced like this and be input in trigger circuit 2-1.Trigger circuit 2-1 makes the voltage of B point overturn after receiving trigger pip, namely being overturn by original logic high is logic low, because triode T emitter junction does not have bias voltage, so triode T ends, the current potential of collector raises, namely the 14th pin current potential of ATX power supply 5 raises, and namely such ATX power supply 5 quits work.
The voltage of the first diode D1 obtains from the 9th pin of ATX power supply 5 through the 5th resistance R5 dividing potential drop, when mainboard has 5 volts of V Standbies, the voltage that the voltage ratio second diode D2 that first diode D1 exports exports is high, therefore the second diode D2 is in cut-off state, and the oscillator 2-2 of South Bridge chip 2 inside and storer CMOS is powered by the first diode D1; When mainboard does not have 5 volts of V Standbies, first diode D1 does not just have voltage to export yet, the oscillator 2-2 of South Bridge chip 2 inside and storer CMOS is powered by the second diode D2 by 3.3 volts of batteries, so just can ensure the normal operation of clock and not make the configuration parameter in storer CMOS lose.
Claims (2)
1. a booting computer circuit for anti-parameter loss, comprises key and ATX power supply, it is characterized in that: also comprise the South Bridge chip be made up of trigger circuit, oscillator and storer; Described key enters to hold with the second end of described trigger circuit respectively and one end of the first resistance is connected, and the other end of described first resistance is connected with the input end of voltage stabilizer and the 9th pin of described ATX power supply respectively; The output terminal of described voltage stabilizer is connected with the first input end of described trigger circuit, and the output terminal of described trigger circuit is connected with the base stage of triode by the second resistance, and the collector of described triode is connected with the 14th pin of described ATX power supply; First diode cathode is connected with the 9th pin of described ATX power supply by the 5th resistance, the negative pole of its negative pole and the second diode is in parallel and is connected with the parallel connected end of the 3rd resistance and the 4th resistance, and the positive pole of described second diode passes through the 6th resistance and is connected with the positive pole of battery; The other end of described 3rd resistance is connected with described storer, and the other end of described 4th resistance is connected with described oscillator.
2. the booting computer circuit of anti-parameter loss according to claim 1, is characterized in that: described voltage stabilizer is 1117 low pressure difference linear voltage regulators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510215986.9A CN104820486A (en) | 2015-05-01 | 2015-05-01 | Computer start circuit capable of preventing parameter missing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510215986.9A CN104820486A (en) | 2015-05-01 | 2015-05-01 | Computer start circuit capable of preventing parameter missing |
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| CN104820486A true CN104820486A (en) | 2015-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510215986.9A Pending CN104820486A (en) | 2015-05-01 | 2015-05-01 | Computer start circuit capable of preventing parameter missing |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201562231U (en) * | 2009-05-15 | 2010-08-25 | 康舒科技股份有限公司 | Power supply unit |
| CN102339119A (en) * | 2011-07-14 | 2012-02-01 | 广州美电贝尔电业科技有限公司 | Intelligent monitoring device for a power supply |
| CN102375770A (en) * | 2010-08-23 | 2012-03-14 | 鸿富锦精密工业（深圳）有限公司 | Computer start-up testing device |
| CN204009746U (en) * | 2014-05-13 | 2014-12-10 | 中兴通讯股份有限公司 | A kind of electronic equipment and auxiliary switch machine thereof |
-
2015
- 2015-05-01 CN CN201510215986.9A patent/CN104820486A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201562231U (en) * | 2009-05-15 | 2010-08-25 | 康舒科技股份有限公司 | Power supply unit |
| CN102375770A (en) * | 2010-08-23 | 2012-03-14 | 鸿富锦精密工业（深圳）有限公司 | Computer start-up testing device |
| CN102339119A (en) * | 2011-07-14 | 2012-02-01 | 广州美电贝尔电业科技有限公司 | Intelligent monitoring device for a power supply |
| CN204009746U (en) * | 2014-05-13 | 2014-12-10 | 中兴通讯股份有限公司 | A kind of electronic equipment and auxiliary switch machine thereof |
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| EXSB | Decision made by sipo to initiate substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150805 |