CN1475888A - CPU working voltage supplying method and circuit - Google Patents
CPU working voltage supplying method and circuit Download PDFInfo
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- CN1475888A CN1475888A CNA021305242A CN02130524A CN1475888A CN 1475888 A CN1475888 A CN 1475888A CN A021305242 A CNA021305242 A CN A021305242A CN 02130524 A CN02130524 A CN 02130524A CN 1475888 A CN1475888 A CN 1475888A
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Abstract
A method and circuit for supplying the working voltage to CPU features use of a primary power supply for normally supplying working voltage to CPU and a secondary power supply controlled by a controller to supply working voltage to CPU. Its steps include detecting the actual and rated working voltage of CPU, comparting them, and driving the secondary power supply to supply working voltage to CPU if the actual working voltage is lower than rated one.
Description
Technical field
The present invention relates to a kind of CPU working voltage supplying method and circuit, this refers to that especially a kind of to utilize testing circuit to learn that the host CPU power circuit takes place unusual, and make a spare CPU power circuit supply CPU required operating voltage immediately, thereby keep the CPU operate as normal.
Background technology
CPU (Center Processing Unit, central processing unit) be to be responsible for carrying out mission criticals such as computing, logic determines and control items of equipment in the computer system, make people to utilize and successfully use various system programs, application software, and operate various peripheral units, to finish complicated work.Be the importance of CPU to a computer system, the brain of the class of often making things difficult for others is likened, to show its importance.
The same with other driving component, CPU must obtain enough operating voltage can normal operation, this operating voltage system is by providing on the motherboard, but the rated operational voltage that various CPU adopted is also inequality, so the suitable voltage of the essential supply of motherboard just can be kept CPU in operate as normal.For reaching this purpose, one operating voltage supply circuit all can be set on the motherboard, this operating voltage supply circuit only comprises one group of cpu power circuit at present, so as to the direct supply that power supply unit produced with computing machine, further converts the needed operating voltage of CPU to.
Owing on novel C PU such as Pentium 4/III, Celeron, Athlon, Duron, all can possess one group of voltage (Voltage ID) pin, CPU can give motherboard by this Voltage ID pin transmission signal, allows motherboard know the rated operational voltage that this CPU needs.Therefore, on the present motherboard, the capital is provided with cpu power circuit 80 as shown in Figure 5, wherein, power supply unit is sent needed direct supply and is supplied to Vcc and Vin respectively, and above-mentioned voltage via CPU (Voltage ID) signal that pin sent out inputs to this PWM controller (PWM Controller).After this PWM controller receives the signal that this voltage pin sent out, can control the MOS assembly on this cpu power circuit 80, to export the voltage level that conforms to this CPU rated voltage, i.e. Shi Ji operating voltage, this operating voltage promptly is to be delivered to the operating voltage input pin of this CPU by Vout, is operate as normal to provide enough operating voltage to make this CPU.
Above-mentioned existing cpu power circuit 80 is because of making it be widely used on the motherboard according to the different operating voltage of being exported of adjusting automatically of CPU kind.Yet, because whole operating voltage supply circuit only has one group of cpu power circuit 80, therefore, when this cpu power circuit 80 because of wherein partly assembly is impaired or quality is unstable can't stably supply enough operating voltage even be unable to supply operating voltage the time, CPU promptly can't normal operation, and then causes whole computer system to use.When aforementioned circumstances takes place, for relying on dark people of computing machine day, will cause sizable inconvenience and make us puzzlement endlessly.
Therefore, how to provide a kind of CPU working voltage supplying method and circuit person that can effectively address the above problem a little, showing is the task of top priority.
Summary of the invention
In view of above-mentioned, technical matters to be solved by this invention provides a kind of CPU working voltage supplying method and circuit, so as to CPU stably is provided required operating voltage, thereby keeps the CPU operate as normal.
To achieve these goals, the invention provides the spare CPU power circuit of a host CPU power circuit and at least one group, make this host CPU power circuit directly supply CPU required operating voltage again, and make this spare CPU power circuit wouldn't supply CPU required operating voltage.Then, obtain a CPU real work voltage and a CPU rated operational voltage from CPU, and relatively this CPU real work voltage and this CPU rated operational voltage.When if this CPU real work voltage reaches predetermined degree less than this CPU rated operational voltage, even this spare CPU power circuit begins to supply CPU required operating voltage, otherwise, still make this host CPU power circuit directly supply CPU required operating voltage.
Then comprise as for this circuit:
One host CPU power circuit directly provides CPU required operating voltage.
At least one spare CPU power circuit, needing can provide CPU required operating voltage via the control circuit beginning.
One circuit for detecting, can from this CPU, obtain a rated operational voltage and a real work voltage respectively, and when this real work voltage reaches predetermined degree less than this nominal operation pressure, this spare CPU power circuit drives this control circuit, so that can be supplied this CPU required operating voltage via this control circuit.
Be to utilize said method and circuit, can make computing machine when each start, by the required operating voltage of this host CPU power circuit supply CPU, and when as long as this host CPU power circuit can't stably provide enough operating voltage for some reason (taking place unusually), detected circuit predicts immediately, and, make this spare CPU power circuit can in time supply CPU required operating voltage, to keep the operate as normal of CPU so as to driving this control circuit.
For further specifying content of the present invention and demand benefit, below lift a preferred embodiment and conjunction with figs. and describe in detail, the embodiment that is taken off for expressing the usefulness of idea of the present invention, is not in order to claim of the present invention is done any type of restriction only.
Description of drawings
Fig. 1 is the circuit block diagram of the present invention's first preferred embodiment.
Fig. 2 is the circuit block diagram of the present invention's second preferred embodiment.
Fig. 3 is the floor map of the present invention's the 3rd preferred embodiment.
Fig. 4 is the stereo appearance figure of the present invention's the 4th preferred embodiment.
Fig. 5 is the calcspar of existing CPU operating voltage supply circuit.
Embodiment
At Fig. 1, Fig. 2, Fig. 3, among Fig. 4 and Fig. 5, a kind of CPU operating voltage supply circuit 1 involved in the present invention comprises following element: CPU10, voltage pin 11, operating voltage input pin 12, host CPU power circuit 20, input end 21, output terminal 22, spare CPU power circuit 30, input end 31, output terminal 32, control circuit 40,40 ', output terminal 41,41 ', first input end 42,42 ', second input end 43,43 ', the 3rd input end 44 ', circuit for detecting 50, first input end 51, second input end 52, output terminal 53, motherboard 60,60 ', PCI slot 61 ', plug-in card 70.The present invention also provides a kind of CPU working voltage supplying method, comprising:
(a) provide the spare CPU power circuit 30 of a host CPU power circuit 20 and at least one group;
(b) obtain a CPU real work voltage Vcore, can obtain on the operating voltage input pin 12 by CPU;
(c) obtain a CPU rated operational voltage Vid, can obtain on the voltage pin 11 (Voltage ID) by CPU;
(d) relatively this CPU real work voltage Vcore and this CPU rated operational voltage Vid, when if this CPU real work voltage Vcore reaches predetermined degree less than this CPU rated operational voltage Vid, for example: Vcore＜Vid * 80% makes this spare CPU power circuit begin to supply CPU required operating voltage.
By above-mentioned step, can make computing machine when each start, by the required operating voltage of this host CPU power circuit supply CPU, and when as long as this host CPU power circuit can't provide enough operating voltage for some reason (taking place unusual), can supply CPU required operating voltage by this spare CPU power circuit immediately, thereby keep the operate as normal of CPU.
Moreover, see also Fig. 1, be the operating voltage supply circuit of a kind of CPU, this CPU (10) has a Voltage ID voltage pin 11 and operating voltage input pin 12 at least, and this operating voltage supply circuit 1 is to comprise:
One host CPU power circuit 20 is that this CPU10 directly is provided required operating voltage.
At least one spare CPU power circuit 30, needing can provide this CPU10 required operating voltage via 40 beginnings an of control circuit.
One testing circuit 50, can on the Voltage ID voltage pin 11 of this CPU and operating voltage input pin 12, obtain a rated operational voltage and a real work voltage respectively, and when this real work voltage reaches predetermined degree less than this nominal operation pressure, this spare CPU power circuit 30 drives this control circuit 40, so that can be supplied this CPU10 required operating voltage via this control circuit 40.
Further specify its course of work below:
This host CPU power circuit 20, comprise that an input end 21 electricity are connected to the Voltage ID voltage pin 11 of this CPU10, and an output terminal 22 electricity are connected to the operating voltage input pin 12 of this CPU10, according to interrogating with operating voltage that corresponding numerical value is provided to this CPU10 of this Voltage ID voltage pin 11.
This spare CPU power circuit 30 comprise that an input end 31 electricity are connected to the Voltage ID voltage pin 11 of this CPU10, and an output terminal 32 can interrogating so that the operating voltage of corresponding numerical value to be provided according to this Voltage ID voltage pin 11.
This control circuit 40 comprises that an output terminal 41 electricity are connected to output terminal 32 and this spare CPU power circuit 30 of one second input end, 43 may command that the operating voltage input pin 12 of this CPU10, a first input end 42 electricity be connected to this spare CPU power circuit 30 and whether can supply power to this CPU10.
This testing circuit 50 comprises:
One first input end, 51 electricity are connected to the Voltage ID voltage pin 11 of this CPU10, to obtain the rated operational voltage of this CPU;
One second input end, 52 electricity are connected to the operating voltage input pin 12 of this CPU10, to obtain the real work voltage of this CPU;
One output terminal, 53 electricity are connected to second input end 43 of this control circuit 40, can press the predetermined degree that reaches less than this nominal operation in this real work voltage, for example: this real work voltage was pressed 80% o'clock less than this nominal operation, this spare CPU power circuit 30 drives this control circuit 40, so that can be supplied this CPU10 required operating voltage via this control circuit 40.
Borrow the design of foregoing circuit, when this host CPU power circuit 20 breaks down and can't stablize the enough operating voltage of supply the time, utilize this testing circuit 50 can understand this unusual condition immediately, and control signal to second input end 43 of this control circuit 40 immediately by output terminal 53 output one of this testing circuit 50, make the output terminal 41 of this control circuit 40 constitute conducting with first input end 42, at this moment, this spare CPU power circuit 30 can be supplied this CPU10 required operating voltage via this control circuit 40, to keep this CPU10 operate as normal.
See also embodiment shown in Figure 2, its haply with on to take off embodiment similar, difference only is the part of this control circuit 40 ', promptly this control circuit 40 ' is to comprise that an output terminal 41 ' electricity is connected to the operating voltage input pin 12 of this CPU10, one first input end, 42 ' electricity is connected to the output terminal 32 of this spare CPU power circuit 30, one second input end, 43 ' electricity is connected to the output terminal 22 of this host CPU power circuit 20, and whether this spare CPU power circuit 30 of one the 3rd input end, 44 ' may command can supply power to this CPU10, and the 3rd defeated end 44 ' and electricity are connected to the output terminal 53 of this circuit for detecting 50.Though slightly different in the wiring, only it is made flowing mode and purpose and all is same as routinely, needn't give unnecessary details.
What again, need subsidiary were carried is that above-mentioned operating voltage supply circuit 1 can be located on the motherboard 60, referring to Fig. 3.In addition, see also Fig. 4, this spare CPU power circuit 30, control circuit 40 and testing circuit 50 can be located on the plug-in card 70 with on the PCI slot 61 ' that is plugged in another motherboard 60 '.
Claims (6)
1, a kind of CPU working voltage supplying method is characterized in that: comprise the steps:
(a) provide the spare CPU power circuit of a host CPU power circuit and at least one group;
(b) obtain a CPU real work voltage;
(c) obtain a CPU rated operational voltage;
(d) relatively this CPU real work voltage and this CPU rated operational voltage when if this CPU real work voltage reaches predetermined degree less than this CPU rated operational voltage, make this spare CPU power circuit begin to supply CPU required operating voltage.
2, the operating voltage supply circuit of a kind of CPU is supplied an operating voltage and is given this CPU, and this operating voltage supply circuit is characterized in that comprising:
One host CPU power circuit directly provides this CPU required operating voltage;
At least one spare CPU power circuit, needing can provide this CPU required operating voltage via the control circuit beginning;
One testing circuit, can from this CPU, obtain a rated operational voltage and a real work voltage respectively, and when this real work voltage reaches predetermined degree less than this nominal operation pressure, this spare CPU power circuit drives this control circuit, so that can be supplied this CPU required operating voltage via this control circuit.
3, the operating voltage supply circuit of a kind of CPU, this CPU have a Voltage ID voltage pin and operating voltage input pin at least, and it is characterized in that: this operating voltage supply circuit comprises:
One host CPU power circuit, comprise that an input end electricity is connected to the Voltage ID voltage pin of this CPU and operating voltage that an output terminal electricity is connected to this CPU input pin, according to interrogating with operating voltage that corresponding numerical value is provided of this Voltage ID voltage pin to this CPU;
One spare CPU power circuit, comprising that an input end electricity is connected to the Voltage ID voltage pin of this CPU and an output terminal can interrogating so that the operating voltage of corresponding numerical value to be provided according to this Voltage ID voltage pin;
One control circuit comprises that an output terminal electricity is connected to output terminal and this spare CPU power circuit of one second input end may command that the operating voltage input pin of this CPU, a first input end electricity be connected to this spare CPU power circuit and whether can supplies power to this CPU;
One testing circuit comprises:
One first input end electricity is connected to the Voltage ID voltage pin of this CPU, to obtain the rated operational voltage of this CPU;
One second input end electricity is connected to the operating voltage input pin of this CPU, to obtain the real work voltage of this CPU;
One output terminal electricity is connected to second input end of this control circuit, can be when this real work voltage reaches predetermined degree less than this nominal operation pressure, this spare CPU power circuit drives this control circuit, so that can be supplied this CPU required operating voltage via this control circuit.
4, the operating voltage supply circuit of a kind of CPU, this CPU have a Voltage ID pin and operating voltage input pin at least, and it is characterized in that: this operating voltage supply circuit comprises:
One host CPU power circuit, comprising that an input end electricity is connected to the Voltage ID voltage pin of this CPU and an output terminal can interrogating so that the operating voltage of corresponding numerical value to be provided according to this Voltage ID voltage pin;
One spare CPU power circuit, comprising that an input end electricity is connected to the Voltage ID voltage pin of this CPU and an output terminal can interrogating so that the operating voltage of corresponding numerical value to be provided according to this Voltage ID pin;
One control circuit comprises that operating voltage input pin, the first input end electricity that an output terminal electricity is connected to this CPU is connected to the output terminal of this spare CPU power circuit, whether output terminal and this spare CPU power circuit of one the 3rd input end may command that one second input end electricity is connected to this host CPU power circuit can supply power to this CPU; One testing circuit comprises:
One first input end electricity is connected to the Voltage ID voltage pin of this CPU, to obtain the rated operational voltage of this CPU;
One second input end electricity is connected to the operating voltage input pin of this CPU, to obtain the real work voltage of this CPU;
One output terminal electricity is connected to the 3rd input end of this control circuit, can be when this real work voltage reaches predetermined degree less than this nominal operation pressure, this spare CPU power circuit drives this control circuit, so that can be supplied this CPU required operating voltage via this control circuit.
5, as the operating voltage supply circuit of CPU as described in the claim 2,3 or 4, it is characterized in that: this operating voltage supply circuit can be located on the motherboard.
6, as the operating voltage supply circuit of CPU as described in the claim 2,3 or 4, it is characterized in that: this spare CPU power circuit, control circuit, and circuit for detecting can be located on the plug-in card with on the PCI slot that is inserted in a motherboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02130524 CN1224882C (en) | 2002-08-14 | 2002-08-14 | CPU working voltage supplying method and circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02130524 CN1224882C (en) | 2002-08-14 | 2002-08-14 | CPU working voltage supplying method and circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1475888A true CN1475888A (en) | 2004-02-18 |
| CN1224882C CN1224882C (en) | 2005-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02130524 Expired - Fee Related CN1224882C (en) | 2002-08-14 | 2002-08-14 | CPU working voltage supplying method and circuit |
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| Country | Link |
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| CN (1) | CN1224882C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344810B (en) * | 2007-07-09 | 2010-07-21 | 华硕电脑股份有限公司 | Motherboard and its power supply module |
| CN102207742A (en) * | 2010-03-30 | 2011-10-05 | 鸿富锦精密工业（深圳）有限公司 | Voltage control device |
| CN102221868A (en) * | 2010-04-15 | 2011-10-19 | 鸿富锦精密工业（深圳）有限公司 | Standby power generating circuit |
| CN102789299A (en) * | 2011-05-18 | 2012-11-21 | 鸿富锦精密工业（深圳）有限公司 | CPU voltage protecting circuit |
| CN104570829A (en) * | 2014-11-19 | 2015-04-29 | 苏州市欧康诺电子科技有限公司 | High-reliability UV safety protection system |
-
2002
- 2002-08-14 CN CN 02130524 patent/CN1224882C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344810B (en) * | 2007-07-09 | 2010-07-21 | 华硕电脑股份有限公司 | Motherboard and its power supply module |
| CN102207742A (en) * | 2010-03-30 | 2011-10-05 | 鸿富锦精密工业（深圳）有限公司 | Voltage control device |
| CN102207742B (en) * | 2010-03-30 | 2014-01-15 | 鸿富锦精密工业（深圳）有限公司 | Voltage control device |
| CN102221868A (en) * | 2010-04-15 | 2011-10-19 | 鸿富锦精密工业（深圳）有限公司 | Standby power generating circuit |
| CN102789299A (en) * | 2011-05-18 | 2012-11-21 | 鸿富锦精密工业（深圳）有限公司 | CPU voltage protecting circuit |
| CN102789299B (en) * | 2011-05-18 | 2015-03-25 | 鸿富锦精密工业（深圳）有限公司 | CPU voltage protecting circuit |
| CN104570829A (en) * | 2014-11-19 | 2015-04-29 | 苏州市欧康诺电子科技有限公司 | High-reliability UV safety protection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1224882C (en) | 2005-10-26 |
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