CN1652061A - Computer host board and its power controller - Google Patents

Computer host board and its power controller Download PDF

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Publication number
CN1652061A
CN1652061A CN 200510058959 CN200510058959A CN1652061A CN 1652061 A CN1652061 A CN 1652061A CN 200510058959 CN200510058959 CN 200510058959 CN 200510058959 A CN200510058959 A CN 200510058959A CN 1652061 A CN1652061 A CN 1652061A
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China
Prior art keywords
voltage level
power
source line
electrically connected
control
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CN 200510058959
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CN100357856C (en
Inventor
谢正立
苏家弘
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Via Technologies Inc
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Via Technologies Inc
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Abstract

The present invention relates to a power supply control device, including a comparison unit, a control unit and a switching unit, in which the comparison unit is respectively electrically connected with a first power line and a second power line, and the first voltage level and second voltage level can produce a comparison signal according to a reference signal. Said control unit is electrically connected with said comparison unit, and can be used for receiving the comparison signal, and can produce a control signal according to the comparison signal, and the switching unit is electrically connected with the control unit, and can be switched on/switched off according to the control signal so as to make first power line and second power line be shorted/broken.

Description

Motherboard and power control thereof
Technical field
The present invention relates to a kind of motherboard and power control thereof, especially relate to the motherboard and the power control thereof of chip with several input power supplys.
Background technology
Along with scientific-technical progress, in present modern information society, various electronic message unit (for example computing machine, mobile phone, network servicer ... Deng) all need various chip to make its operation, therefore how to make the chip normal running, also just become one of most important research and development emphasis of present information industry.
Generally speaking, various chips all are to be installed on the circuit board (for example printed circuit board (PCB)) on hardware, integrated level, minimizing power consumption, the increase arithmetic speed of present industrial community in order to improve chip, therefore the core circuit (core circuit) in the chip all can use lower bias voltage, and the voltage level of the electronic signal of core circuit is also lower, but chip internal also has other circuit of different nature, for example export input circuit (I/O buffer), then need the higher voltage level.Illustrate, all a South Bridge chip can be arranged on the motherboard of general computing machine, its inside has a plurality of Digital Logic (digital logic), and its needed voltage includes 3.3 volts, 2.5 volts voltage level at least, therefore motherboard to I haven't seen you for ages two different power leads of configuration (for example power lead of one 3.3 volts power lead and one 2.5 volts) are connected to South Bridge chip, in order to the voltage of different voltage level to be provided, so that the South Bridge chip operation.
Two power leads should arrive the voltage stabilizing state simultaneously ideally, the Digital Logic of South Bridge chip inside is operated simultaneously, but in fact two power leads time of reaching voltage stabilizing state (arriving 2.5 volts and 3.3 volts) is different usually, (for example above 2 milliseconds) just may cause chip operation undesired when this mistiming is excessive.
Therefore, how providing a kind of long motherboard and power control thereof of mistiming of avoiding two power supplys to arrive voltage stabilizing, is one of current important topic.
Summary of the invention
Because above-mentioned problem, purpose of the present invention is for providing a kind of motherboard and power control thereof that two power leads arrive the mistiming of voltage stabilizing state that shorten.
Therefore, for reaching above-mentioned purpose, power control according to the present invention cooperates with one first power lead and a second source line, and first power lead and second source line are electrically connected to a chip respectively, provide one first voltage level to chip so that see through first power lead, and provide one second transformation level to chip through the second source line.Power control comprises a comparing unit, a control module, a switch element; In the present invention, comparing unit is electrically connected first power lead and second source line and foundation one reference signal, first voltage level and second voltage level respectively, produces a comparison signal; Control module is electrically connected comparing unit, in order to receiving comparison signal, and produces a control signal according to comparison signal; Switch element is electrically connected control module, and according to control signal On/Off, so that short circuit/first power lead and second source line open circuit.
In addition, the present invention also discloses a kind of motherboard, and it comprises a chip, one first power lead, a second source line, a comparing unit, a control module and a switch element.In the present invention, first power lead and second source line are respectively in order to provide one first voltage level and one second voltage level to chip; Comparing unit is electrically connected first power lead and second source line respectively, and according to a reference signal, first voltage level and second voltage level, produces a comparison signal; Control module is electrically connected comparing unit, in order to receiving comparison signal, and produces a control signal according to comparison signal; Switch element is electrically connected control module, and according to control signal On/Off, so that short circuit/first power lead and second source line open circuit.
From the above, because of complying with motherboard of the present invention and power control thereof, utilize a comparing unit, a control module and a switch element to control first power lead and the short circuit between the two of second source line/open circuit, so can effectively avoid the mistiming of first power lead and second source line arrival voltage stabilizing state excessive, and can make that chip operation is normal.
Description of drawings
Figure 1A is the motherboard of the preferred embodiment of the present invention and the calcspar of power control thereof;
Figure 1B is the motherboard of the preferred embodiment of the present invention and the circuit diagram of power control thereof; And
Fig. 2 is power control when operation among Figure 1B, the sequential chart of first power lead and the variation of second source line.
The component symbol explanation:
The 1-motherboard
The 10-power control
The 101-comparing unit
1011-first comparer
1012-second comparer
The 103-control module
The 105-switch element
The 107-reference power source
11-first power lead
13-second source line
The 15-chip
91-first voltage level
92-second voltage level
R 1-the first resistance
R 2-the second resistance
The G-grid
The S-source electrode
The D-drain electrode
V Cc-DC voltage
N P1-node
Embodiment
Hereinafter with reference to correlative type, motherboard and power control thereof according to the preferred embodiment of the present invention are described.
Please refer to shown in Figure 1A and Figure 1B, be the motherboard of the preferred embodiment of the present invention and the calcspar and the circuit diagram of power control thereof.In the present embodiment, have a power control 10 (shown in the dotted line square) in the motherboard 1, and motherboard 1 can be a computer main frame panel.
Motherboard 1 comprises a power control 10, one first power lead 11, a second source line 13 and a chip 15.
Wherein, chip 15 is the semiconductor chips that are arranged on the motherboard 1, for example South Bridge chip or north bridge chips, and chip 15 inside have a plurality of Digital Logic (figure does not show), it is mainly used to carry out data operation and Data Processing etc., and a plurality of Digital Logic in the chip 15 may need 3.3 volts or 2.5 volts voltage level respectively, that is chip 15 may need the voltage level of 3.3 volts and 2.5 volts simultaneously.Palpus attention person though only illustrate 3.3 volts and 2.5 volts among this embodiment, is not limited thereto, and chip 15 can give different voltage levels according to the required bias voltage of Digital Logic.
First power lead 11 is power leads of 3.3 volts on the motherboard, and second source line 13 is power leads of 2.5 volts on the motherboard.In reality is implemented, first power lead 11 and second source line 13 can be a power-supply wiring of motherboard, and be electrically connected to chip 15 respectively, in order to voltage that one first voltage level (3.3 volts) and one second voltage level (2.5 volts) are provided to chip 15, required electricity needs during with 15 operations of supply chip.Generally speaking, first power lead 11 of motherboard 1 arrives voltage stabilizing state (3.3 volts and 2.5 volts) asynchronism(-nization) respectively with second source line 13, has a mistiming between the two.
Power control 10 comprises a comparing unit 101, a control module 103, a switch element 105 and a reference power source 107.Wherein, comparing unit 101 is electrically connected first power lead 11 and second source line 13 respectively, to receive the voltage of first voltage level and second voltage level.In the present embodiment, comparing unit 101 has one first comparer 1011 and one second comparer 1022; First comparer 1011 and second comparer 1012 have two input ends and an output terminal OUT1, OUT2 respectively, and two input ends are respectively a normal phase input end (being denoted as "+" among Figure 1B) and an inverting input (being denoted as "-" among Figure 1B).
Wherein, the normal phase input end of first comparer 1011 is electrically connected first power lead 11, the normal phase input end of second comparer 1012 is electrically connected second source line 13, and inverting input OUT1, the OUT2 of first comparer 1011 and second comparer 1012 are electrically connected to reference power source 107 respectively.First comparer 1011 produces one first comparison signal according to a reference voltage level and first voltage level that reference power source 107 is provided, and in like manner, second comparer 1012 produces one second comparison signal according to the reference voltage level and second voltage level.
Control module 103 is electrically connected comparing units 101, in order to receiving first comparison signal and second comparison signal, and according to first comparison signal and second comparison signal, produces a control signal.In the present embodiment, control module 103 is a Sheffer stroke gate (NAND GATE), and control module 103 has two input ends, be electrically connected the output terminal OUT1 of first comparer 1011 and the output terminal OUT2 of second comparer 1012 respectively, in order to receive first comparison signal and second comparison signal, at this moment, control module 103 produces a control signal according to first comparison signals and second comparison signal.
Switch element 105 is nmos switch elements, and has a grid G, one source pole S, a drain D.Wherein, grid G is electrically connected to control module 103, and source S is electrically connected to first power lead 11 and drain D is electrically connected to second source line 13.Switch element 105 is On/Off according to control signal, when switch element 105 is opened, and then first power lead 11 and 13 both short circuits of second source line; On the contrary, when switch element 105 is closed, then first power lead 11 and second source line 13 both open circuit.In addition, being familiar with this operator, all to understand switch element certainly be a PMOS on-off element (not shown).
Reference power source 107 in the present embodiment can be a direct current power supply V of motherboard 1 Cc, and utilize one first resistance R 1With one second resistance R 2In order to dividing potential drop, make it at a node N P1Reference voltage level can be provided.At this hypothetical reference voltage level is 2.25 volts.The inverting input of first comparer 1011 and second comparer 1012 is linked to node N in addition P1Palpus attention person, the user can adjust first resistance R according to needed reference voltage level 1With second resistance R 2Ratio so that obtain different reference voltage levels, therefore first resistance R 1And second resistance R 2Resistance can select for use according to user's actual demand.
Power control 10 operational scenario of present embodiment are as follows: at first when motherboard 1 will make chip 15 beginning starts, can see through first power lead 11 and begin to provide first voltage level and second voltage level to chip 15 respectively with second source line 13.This moment, first voltage level and second voltage level did not reach voltage stabilizing state (3.3 volts and 2.5 volts) as yet, and did not reach reference voltage level (2.25 volts) as yet yet.The normal phase input end of first comparer 1011 is in order to receive first voltage level, and the inverting input of first comparer 1011 is in order to receive reference voltage level (2.25 volts), then first comparer 1011 begins comparison first voltage level and reference voltage level, produces first comparison signal according to both voltage level and delivers to control module 103.
Again, the normal phase input end of second comparer 1012 is in order to receiving second voltage level, and the inverting input of second comparer 1012 is in order to receive reference voltage (2.25 volts).Then second comparer 1012 begins comparison second voltage level and reference voltage level, produces second comparison signal according to both voltage level and delivers to control module 103.
At this moment, first voltage level and second voltage level all do not reach reference voltage level (2.25 volts), therefore first comparison signal and second comparison signal are all the comparison signal of low voltage level, and the control signal that makes control module 103 produce also is the control signal of low voltage level.Control module 103 control switch unit 105 are opened, this moment first power lead 11 and 13 both short circuits of second source line, and therefore first power lead has identical voltage level at this moment with the second source line.
If first voltage level of first power lead 11 reaches reference voltage level (2.25 volts) earlier, and when second voltage level of second source line 13 does not reach reference voltage level (2.25 volts) as yet, this moment, first comparison signal was the comparison signal of high-voltage level, and second comparison signal is the comparison signal of low voltage level.Control module 103 produces the control signal of low voltage level according to first comparison signals with second comparison signal, open in order to control switch unit 105, makes win power lead 11 and 13 both short circuits of second source line, and both have same voltage level at this moment.In addition, if when second voltage level reaches reference voltage level (2.25 volts) earlier, and when first voltage level does not reach reference voltage level (2.25 volts) as yet, this moment, second comparison signal was the comparison signal of high-voltage level, and first comparison signal is the comparison signal of low voltage level, then control module 103 produces the control signal of low voltage level according to first comparison signal and second comparison signal, open in order to control switch unit 105, make win power lead 11 and 13 both short circuits of second source line, this moment, first power lead had identical voltage level with the second source line.Excessive according to this kind mechanism with the mistiming that first voltage level that prevents to deliver to chip 15 and second voltage level arrive voltage stabilizing state (3.3 volts and 2.5 volts).
In addition, when first voltage level and second voltage level all reach reference voltage level (2.25 volts), first comparer 1011 is first voltage level and reference voltage levels (2.25 volts) relatively, and first comparison signal that produces high-voltage level according to both voltage levels is delivered to control module 103; And second comparer 1012 relatively second voltage level and reference voltage levels (2.25 volts), and deliver to control module 103 according to both second comparison signals of voltage level generation high-voltage level.This moment, control module 103 produced the control signal of the accurate position of high voltage according to first comparison signals and second comparison signal, open in order to control switch unit 105, make first power lead 11 and second source line 13 both for opening circuit, this moment, first power lead and second source line provided first voltage level and second voltage level to chip 15 respectively, and first power lead 11 and second source line 13 arrive voltage stabilizing state (3.3 volts and 2.5 volts) respectively, in order to the electric power of chip 15 to be provided.
As mentioned above, switch element 105 connects first power lead 11 and second source line 13, when both one reference voltage levels of no show still (2.25 volts), make first power lead 11 and 13 both short circuits of second source line, make both arrive reference voltage level (2.25 volts) simultaneously, avoid causing chip 15 internal digital logic malfunctions.
Please refer to shown in Figure 2, during for the power control among Figure 1B 10 operation, the sequential chart that first power lead 11 and second source line 13 change.Wherein, the transverse axis of waveform is the time, and the longitudinal axis is the size of voltage, and among Fig. 2 from top to bottom block curve respectively in order to first voltage level 91 of representing first power lead and second voltage level 92 of second source line.By the sequential chart of Fig. 2, be illustrated the operation of motherboard and the power control thereof of Figure 1B.
At first, at time t 0To t 1During, desire to make chip 15 operation when motherboard 1, can begin to provide first voltage level 91 and second voltage level 92 to chip 15.This moment, first voltage level 91 and second voltage level 92 did not reach reference voltage level (2.25 volts) as yet.First comparer 1011 relatively first voltage level 91 produces first comparison signal with reference voltage level (2.25 volts).Again, second comparer 1012 compares second voltage level 92 and reference voltage level (2.25 volts) generation second comparison signal.This moment, control module 103 was opened in order to control switch unit 105, made first power lead 11 and 13 both short circuits of second source line, and this moment, first voltage level was identical with the voltage level of second voltage level.
At time t 1The time, suppose to reach reference voltage level (2.25 volts) earlier when second voltage level 92 that inputs to second comparer 1012, and when first voltage level 91 that inputs to first comparer 1011 does not reach reference voltage level (2.25 volts) as yet, second comparison signal is the comparison signal of high-voltage level, and first comparison signal is the comparison signal of low voltage level, then control module 103 produces the control signal of low voltage level according to first comparison signal and second comparison signal, open in order to control switch unit 105, so that make win power lead 11 and 13 both short circuits of second source line by switch element 105, second voltage level 92 that be connected to switch element 105 this moment will have identical voltage level with first voltage level 91, therefore can finely tune second voltage level 92 to being lower than 2.25 volts.
At time t 2The time, when first voltage level 91 and second voltage level 92 all reach reference voltage level (2.25 volts), control module 103 produces the control signal of high-voltage levels at this moment, open in order to control switch unit 105, both open circuit to make first power lead 11 and second source line 13, this moment, first voltage level 91 had different voltage levels respectively with second voltage level 92, and at t 3Arrive voltage stabilizing state (3.3 volts and 2.5 volts) respectively.
As mentioned above, by the short circuit of first power lead 11 and second source line 13/open circuit, in order to control the time that first voltage level 91 and second voltage level 92 arrive voltage stabilizing state (3.3 volts and 2.5 volts), and then shorten the mistiming that both arrive the voltage stabilizing state, so it is excessive with the mistiming that second voltage level 92 arrives the voltage stabilizing states to avoid delivering to first voltage level 91 of chip 15, and it is undesired to cause chip 15 to operate.
The above only is an illustrative, and nonrestrictive.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the appended claim its equivalent modifications of carrying out or change.

Claims (10)

1. power control, it cooperates with one first power lead and a second source line, and this first power lead and this second source line are electrically connected to a chip respectively, provide one first voltage level to this chip so that see through this first power lead, and see through this second source line and provide one second voltage level to this chip, this power control comprises:
One comparing unit, it is electrically connected this first power lead and this second source line respectively, and according to a reference signal, this first voltage level and this second voltage level, produces a comparison signal;
One control module, it is electrically connected this comparing unit, in order to receive this comparison signal and to produce a control signal according to this comparison signal; And
One switch element, it is electrically connected this control module, and according to this control signal On/Off, in order to short circuit/this first power lead and this second source line open circuit.
2. power control according to claim 1 more comprises a reference power source, and in order to this reference signal to be provided, this reference signal is a reference voltage level.
3. power control according to claim 1, wherein this comparing unit has one first comparer and one second comparer, and this first comparer is electrically connected this first power lead, and this second comparer is electrically connected this second source line.
4. power control according to claim 1, wherein this control module is a Sheffer stroke gate.
5. power control according to claim 1, wherein this switch element is a nmos switch element or is a PMOS on-off element.
6. motherboard comprises:
One chip;
One first power lead is in order to provide one first voltage level to this chip;
One second source line is in order to provide one second voltage level to this chip;
One comparing unit, it is electrically connected this first power lead and this second source line respectively, and according to a reference signal, this first voltage level and this second voltage level, produces a comparison signal;
One control module, it is electrically connected this comparing unit, in order to receiving this comparison signal, and produces a control signal according to this comparison signal; And
One switch element, it is electrically connected this control module, and according to this control signal On/Off, in order to short circuit/this first power lead and this second source line open circuit.
7. motherboard according to claim 6 more comprises a reference power source, and in order to this reference signal to be provided, this reference signal is a reference voltage level.
8. motherboard according to claim 6, wherein this comparing unit has one first comparer and one second comparer, and this first comparer is electrically connected this first power supply, and this second comparer is electrically connected this second source.
9. motherboard according to claim 6, wherein this control module is a Sheffer stroke gate.
10. motherboard according to claim 6, wherein this switch element is a nmos switch element or is a PMOS on-off element.
CNB2005100589591A 2005-03-25 2005-03-25 Computer host board and its power controller Active CN100357856C (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100555169C (en) * 2006-01-17 2009-10-28 鸿富锦精密工业（深圳）有限公司 Power supply control circuit for microprocessor
CN102073366A (en) * 2010-12-24 2011-05-25 苏州华芯微电子股份有限公司 Method for electrifying computer power supply chip
CN101751107B (en) * 2008-11-28 2011-10-05 英业达股份有限公司 Computer system
CN101763156B (en) * 2008-12-25 2011-11-09 英业达股份有限公司 Computer system and power supply control device thereof
CN102882203A (en) * 2011-07-14 2013-01-16 冠捷投资有限公司 Power transmission system, device and protection circuit with power supply protection function
US8358300B2 (en) 2009-05-08 2013-01-22 Asustek Computer Inc. Display card and display card operating method
CN101882431B (en) * 2009-05-08 2013-08-28 华硕电脑股份有限公司 Display card matching input voltage sources with inconsistent timing to maintain operation and operation method
CN104142709A (en) * 2013-05-09 2014-11-12 鸿富锦精密电子(天津)有限公司 Mainboard
CN108732483A (en) * 2017-04-20 2018-11-02 致茂电子(苏州)有限公司 Have the test device and test method of surging protection
US10802070B2 (en) 2017-04-20 2020-10-13 Chroma Ate Inc. Testing device and testing method with spike protection

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
JP2871309B2 (en) * 1992-07-20 1999-03-17 ヤマハ株式会社 Power supply voltage detection circuit
KR0120606B1 (en) * 1994-12-31 1997-10-30 김주용 Auto mode selecting circuit of semiconductor memory
TW407256B (en) * 1998-10-16 2000-10-01 Samsung Electronics Co Ltd Power supply apparatus of an LCD and voltage sequence control method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100555169C (en) * 2006-01-17 2009-10-28 鸿富锦精密工业（深圳）有限公司 Power supply control circuit for microprocessor
CN101751107B (en) * 2008-11-28 2011-10-05 英业达股份有限公司 Computer system
CN101763156B (en) * 2008-12-25 2011-11-09 英业达股份有限公司 Computer system and power supply control device thereof
US8358300B2 (en) 2009-05-08 2013-01-22 Asustek Computer Inc. Display card and display card operating method
CN101882431B (en) * 2009-05-08 2013-08-28 华硕电脑股份有限公司 Display card matching input voltage sources with inconsistent timing to maintain operation and operation method
CN102073366A (en) * 2010-12-24 2011-05-25 苏州华芯微电子股份有限公司 Method for electrifying computer power supply chip
CN102882203A (en) * 2011-07-14 2013-01-16 冠捷投资有限公司 Power transmission system, device and protection circuit with power supply protection function
CN104142709A (en) * 2013-05-09 2014-11-12 鸿富锦精密电子(天津)有限公司 Mainboard
CN108732483A (en) * 2017-04-20 2018-11-02 致茂电子(苏州)有限公司 Have the test device and test method of surging protection
US10802070B2 (en) 2017-04-20 2020-10-13 Chroma Ate Inc. Testing device and testing method with spike protection

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