CN101290738A - Drive circuit - Google Patents
Drive circuit Download PDFInfo
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- CN101290738A CN101290738A CNA2007100966290A CN200710096629A CN101290738A CN 101290738 A CN101290738 A CN 101290738A CN A2007100966290 A CNA2007100966290 A CN A2007100966290A CN 200710096629 A CN200710096629 A CN 200710096629A CN 101290738 A CN101290738 A CN 101290738A
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- impact damper
- conducting
- level shifter
- driving circuit
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Abstract
The invention provides a drive circuit, which comprises an electrical level shifter, a buffer and a switch, wherein the switch is coupled between the electrical level shifter and the buffer; moreover, the switch is not switched into conduction during the polling of the electrical level shifter, and is switched into conduction when the polling of the electrical level shifter is finished. Therefore, the electrical level shifter and the buffer have different polling time, thereby avoiding the influence on the polling capacity of the electrical level shifter caused by heavy current due to simultaneous turnon.
Description
Technical field
The present invention relates to a kind of display, and be particularly related to a kind of driving circuit of display.
Background technology
Please refer to Fig. 1, Fig. 1 is the driving circuit figure that is used for display according to conventional art.Driving circuit 100 comprises bolt-lock unit 105, low pressure buffer device 110, level shifter 120 and impact damper 130.Level shifter (level shifter) 120 can be converted to input voltage VIN the output voltage VO UT with big voltage swing.
When the voltage level of input voltage VIN changed, level shifter 120 can carry out transition action (be converted to electronegative potential or be converted to noble potential by electronegative potential by noble potential) simultaneously with impact damper 130.In the polling of level shifter 120, level shifter 120 and impact damper 130 may be because being in elicit illness state (tri-state) the big electric current of conducting, and then earth terminal caused pressure drop.Because the current path in the chip has dead resistance, the big electric current of level shifter 120 and 130 conductings of impact damper can be drawn high the voltage level of earth terminal.If the transition ability of level shifter 120 is not good, promptly possible pressure drop because of earth terminal, and can't finish transition smoothly.
In circuit design, for example the driving circuit of LCD normally is made up of a plurality of level shifters and impact damper, and when carrying out transition, the electric current of institute's conducting is bigger, makes the voltage of earth terminal raise.At this moment, level shifter also can't be finished the transition action smoothly with regard to easier being affected.
Summary of the invention
The invention provides a kind of driving circuit, allow level shifter and impact damper not carry out transition simultaneously, avoid producing big electric current and influence the transition action of level shifter.
The present invention provides a kind of driving circuit in addition, and a switch is set between level shifter and impact damper, allows impact damper not carry out the transition action simultaneously with level shifter, to avoid influencing the transition action of level shifter.
The present invention provides a kind of driving circuit again, enable buffer again after level shifter is finished transition, and the big electric current that is produced when avoiding transition simultaneously is to promote the transition ability of driving circuit.
For reaching above-mentioned and other purpose, the present invention proposes a kind of driving circuit, comprises level shifter, impact damper and first switch.Wherein, level shifter is in order to the voltage level of conversion input voltage, and first switch is coupled between level shifter and the impact damper, not conducting when level shifter carries out transition, and conducting after level shifter is finished transition.
Above-mentioned driving circuit more comprises second switch in one embodiment, is coupled between the input end of operating voltage and impact damper.Wherein, when first switch conduction, not conducting of second switch, when the first not conducting of switch, the second switch conducting.
The present invention proposes a kind of driving circuit, comprises level shifter, first impact damper, second impact damper, first switch and second switch.Level shifter is in order to the voltage level of conversion input voltage.First switch is coupled between the level shifter and first impact damper, and second switch couples between first impact damper and second impact damper.Not conducting when first switch and second switch carry out transition at level shifter, and conducting after level shifter is finished transition.
Above-mentioned driving circuit more comprises the 3rd switch in one embodiment, is coupled between the input end of the operating voltage and first impact damper.Wherein, when first switch conduction, the 3rd not conducting of switch, when the first not conducting of switch, the 3rd switch conduction.
The present invention proposes a kind of driving circuit, comprises level shifter, impact damper and switch.Level shifter is in order to the voltage level of conversion input voltage.Impact damper is coupled to the output terminal of level shifter.Switch is coupled between the power end of operating voltage and impact damper, in order to the power supply supply time of controller buffer.Not conducting when switch carries out transition at level shifter, and conducting after level shifter is finished transition, the time of carrying out transition with delay buffer.
The present invention proposes a kind of driving circuit in addition and comprises level shifter, impact damper and switch.Level shifter is in order to the voltage level of conversion input voltage, and impact damper is coupled to the output terminal of level shifter.Switch is coupled between earth terminal and the impact damper.Not conducting when switch carries out transition at level shifter, and conducting after level shifter is finished transition cause the pressure drop of earth terminal to avoid the transition simultaneously of level shifter and impact damper.
The present invention reintroduces a kind of driving circuit in addition and comprises level shifter, impact damper, first resistance, second resistance, first switch and second switch.Level shifter is in order to the voltage level of conversion input voltage.Impact damper is coupled to the output terminal of level shifter, and operates between operating voltage and the earth terminal.First resistance couples between operating voltage and the impact damper.Second resistance is coupled between earth terminal and the impact damper.First switch in parallel is in first resistance.Second switch is parallel to second resistance.Not conducting when first switch and second switch carry out transition at level shifter, and conducting after level shifter is finished transition are to reduce the electric current that impact damper carries out the conducting of transition time institute.
Comprehensively above-mentioned, the present invention separates the level shifter and the transition time of impact damper, avoids the big electric current that simultaneously transition caused and influences the voltage level of earth terminal.Therefore, level shifter can carry out the transition action under normal bias voltage, allow driving circuit have better transition ability.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment of the present invention cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is the driving circuit figure according to conventional art.
Fig. 2 is driving circuit figure according to an embodiment of the invention.
Fig. 3 (a) is driving circuit figure according to another embodiment of the present invention.
Fig. 3 (b) is driving circuit signal timing diagram according to another embodiment of the present invention.
Fig. 3 (c), Fig. 4 (a) to Fig. 4 (d), Fig. 5 (a) to Fig. 5 (d) and Fig. 6 be driving circuit figure according to the embodiment of the invention.
The reference numeral explanation
100,200,300,301,400-403,500-503,600: driving circuit
105,210,310,410,505,531,605: fasten lock unit
110,230,320,533: the low pressure buffer device
120,240,330,420,510,535,610: level shifter
130,220,340,430,440,520,537,539,620: impact damper
IDD: leakage current
IN: first input voltage
INB: second input voltage
R1, R2: resistance
S2-S25: switch
T1, t2: time point
T: time durations
VC: control signal
VD, VDD, VS, VSS: operating voltage
VIN: input voltage
VL: translation voltage
VOUT, VOUT ': output voltage
Embodiment
Fig. 2 is driving circuit figure according to an embodiment of the invention.Driving circuit 200 comprises bolt-lock unit 210, low pressure buffer device 230, level shifter 240, switch S 2 and impact damper 220, and wherein switch S 2 is coupled between the input end of level shifter 240 and impact damper 220.Level shifter 240 and impact damper 220 operate between operating voltage VDD and the operating voltage VSS, and bolt-lock unit 210 and low pressure buffer device 230 then operate between operating voltage VD and the operating voltage VS.Operating voltage VDD can be greater than operating voltage VD, and operating voltage VSS can be less than operating voltage VS.Low pressure buffer device 230 can be constituted by inverter circuit with impact damper 220.
Bolt-lock unit 210 receives an input voltage VIN, in order to the bolt-lock input voltage VIN.Low pressure buffer device 230 sees through bolt-lock unit 210 and receives input voltage VIN, and the output-input voltage VIN and the second input voltage INB, and wherein the first input voltage IN and the second input voltage INB are anti-phase each other.When level shifter 240 carries out transition when action, switch S 2 not conductings this moment, level shifter 240 produces a translation voltage VL after finishing transition according to the first input voltage IN and the second input voltage INB.Then, actuating switch S2 allows impact damper 220 receive translation voltage VL to carry out transition and to produce an output voltage VO UT according to this.Because the transition of level shifter 240 and impact damper 220 is not simultaneously, produce the big electric current of moment between therefore can avoiding at the same time and cause the pressure drop of earth terminal to improve, make level shifter 240 have better transition ability.
Fig. 3 (a) is driving circuit figure according to another embodiment of the present invention.Driving circuit 300 comprises bolt-lock unit 310, low pressure buffer device 320, level shifter 330, switch S 3, S4 and impact damper 340, wherein switch S 3 is coupled between the input end of level shifter 330 and impact damper 340, and switch S 4 is coupled between the input end of operating voltage VDD and impact damper 340.Bolt-lock unit 310 receives an input voltage VIN, and in order to the bolt-lock input voltage VIN and export a control signal VC, and control signal VC also can be produced by alternate manner.Driving circuit 300 sees through fastens lock unit 310 reception input voltage VIN.Bolt-lock unit 310 and low pressure buffer device 320 operate between operating voltage VD and the operating voltage VS, and level shifter 330 and impact damper 340 operate between operating voltage VDD and the operating voltage VSS.At this similarly, operating voltage VDD can be greater than operating voltage VD, and operating voltage VSS can be less than operating voltage VS, and operating voltage VS and operating voltage VSS can be earth terminal voltage.
In the application of a lot of circuit, for example the driving circuit of LCD screen fastens lock unit 310 and be commonly used to fasten the lock input voltage VIN, and in the present embodiment, input voltage VIN is between operating voltage VD and operating voltage VS.When fastening the input voltage VIN of the lock unit 310 output locks of fastening, control signal VC can be fastened lock unit 310 simultaneously and be enabled.Therefore, the switch S 3 in the driving circuit 300, S4 can judge the opportunity of conducting via control signal VC, to avoid level shifter 330 and impact damper 340 transition take place simultaneously.
In driving circuit 300,320 of low pressure buffer devices are used for receiving fastens the input voltage VIN that lock unit 310 is provided, and exports the first input voltage IN and the second input voltage INB according to this, and wherein, the first input voltage IN and the second input voltage INB are anti-phase each other.When fastening lock unit 310 output-input voltage VIN, driving circuit 300 is according to control signal VC not actuating switch S3 but actuating switch S4.Because switch S 3 not conductings, so impact damper 340 can not carry out the transition action along with the output of level shifter 330, and actuating switch S4 then can make the input end of impact damper 340 maintain high-voltage level, avoids becoming floating.After level shifter 330 was finished transition, driving circuit 300 actuating switch S3 and off switch S4 allowed impact damper 340 receive translation voltage VL carrying out transition, and produce output voltage VO UT.Because the transition of level shifter 330 and impact damper 340 is not simultaneously, can avoid producing the big electric current of moment and causing the pressure drop of earth terminal with the time, have influence on the transition ability of level shifter 330 then.
Fig. 3 (b) is the signal timing diagram of driving circuit.Please be simultaneously with reference to Fig. 3 (a) and Fig. 3 (b).Among Fig. 3 (a), switch S 3 is that suspension control signal VC controls with the turn-on action of switch S 4.At time point t1, fasten the input voltage VIN that lock unit 310 exported and rise to high-voltage level by low voltage level, at this moment, the first input voltage IN is a high-voltage level by low-voltage level conversion thereupon, and control signal VC enables.When level shifter 330 began to carry out transition, so translation voltage VL is converted to high-voltage level gradually in time durations T, its slewing rate was decided by the transition ability of level shifter 330.Carry out in the process of transition at level shifter 330, just in the time durations T, actuating switch S3 not, and actuating switch S4.After level shifter 330 is finished transition, just after the time point t2, actuating switch S3, not actuating switch S4.Therefore.It is high-voltage level that output voltage VO UT can just begin by low-voltage level conversion after time point t2.
As mentioned above, carry out in the process of transition at level shifter 330, level shifter 330 can produce leakage current IDD because of transition, and the voltage end of operating voltage VSS can rise because of leakage current IDD.This is because have the relation of dead resistance on the guiding path of electric current, when the electric current of conducting rises, just can produce the phenomenon of pressure drop.If the voltage level ascensional range of operating voltage VSS is excessive, influence the transition ability of level shifter 330 exactly, make translation voltage VL can't reach the suitable voltage level that rises or descend.Present embodiment is also applicable to the situation that is converted to low voltage level by high-voltage level, has in the present technique field and knows the knowledgeable usually, should know by inference easily via exposure of the present invention, do not add tired stating at this.
Fig. 3 (c) is driving circuit figure according to another embodiment of the present invention.Fig. 3 (c) driving circuit 301 is similar to the driving circuit 300 of Fig. 3 (a), and the main switch S 5 of difference in Fig. 3 (c) is to be coupled between the input end of operating voltage VSS and impact damper 340.Can utilize control signal VC equally, when level shifter 330 when carrying out transition, switch S 3 not conductings, and switch S 5 conductings can avoid the input end of impact damper 340 to produce floating.When level shifter 330 after transition, switch S 3 can conductings, and switch S 5 not conductings make the input end of impact damper 340 receive translation voltage VL.In addition, the control of switch S 3, switch S 5 not necessarily will be used control signal VC, also can implement by other control signal.
And, being used for driving the driving circuit of display panel, level more comprises digital/analog converter thereafter, receiving the digital signal that output voltage VO UT was constituted by a plurality of impact dampers, and converts it to aanalogvoltage, to drive display panel.In one embodiment, output voltage VO UT more must pass through another impact damper, just is input to digital/analog converter then.Fig. 4 (a) is driving circuit figure according to another embodiment of the present invention.Driving circuit 400 comprises bolt-lock unit 410, level shifter 420, impact damper 430,440 and switch S 6, S7, S8 and S9.Wherein, the output voltage VO UT that exported of impact damper 430 more produces output voltage VO UT ' through impact damper 440.Switch S 6 is coupled between level shifter 420 and the impact damper 430, and switch S 8 is coupled between the impact damper 430,440.Switch S 7 is coupled between the input end of operating voltage VDD and impact damper 430, and switch S 9 is coupled between the input end of operating voltage VDD and impact damper 440.Bolt-lock unit 410 and level shifter 420 operate between operating voltage VD and the operating voltage VS, impact damper 430,440 operates between operating voltage VDD and the operating voltage VSS, and the embodiment of impact damper 430, impact damper 440 also can be constituted by inverter circuit.
As mentioned above, switch S 6, S8 are preventing that impact damper 430,440 and level shifter 420 from carrying out transition simultaneously, can not conducting when level shifter 420 carries out transition.And switch S 7, S9 mainly are the states that produces suspension joint at the input end of avoiding impact damper 430,440, can conducting when level shifter 420 carries out transition.Switch S 7, S9 not only can be arranged between the input end of operating voltage VDD and impact damper 430,440, also can be arranged on the input end of operating voltage VSS and impact damper 430,440, have the function that the input end of avoiding impact damper 430,440 produces floating equally.The configuration mode of other driving circuit 401 to 403 then as Fig. 4 (b) to shown in Fig. 4 (d), have in the present technique field and to know the knowledgeable usually, via exposure of the present invention, should know its embodiment easily by inference, do not add tired stating at this.
In another embodiment of the present invention, Fig. 4 (a) also can take the mode of conducting in regular turn to adjust the time that impact damper 430,440 carries out transition to switch S 6, the S8 among Fig. 4 (d), switch S 6, S8 only need the corresponding time of adjusting conducting and not conducting at this moment, can avoid the input end generation floating of impact damper 430,440.Have in the present technique field and to know the knowledgeable usually,, should know its embodiment easily by inference, do not add tired stating at this via exposure of the present invention.
In another embodiment of the present invention, can utilize the transition time that whether enables controller buffer of impact damper, shown in Fig. 5 (a), Fig. 5 (b), Fig. 5 (c) and Fig. 5 (d).Fig. 5 (a) is driving circuit figure according to another embodiment of the present invention.Driving circuit 500 comprises bolt-lock unit 505, level shifter 510, impact damper 520 and switch S 16, and wherein switch S 16 is coupled between the power end of operating voltage VDD and impact damper 520, in order to the power supply supply time of controller buffer 520.When level shifter 510 carried out transition, switch S 16 not conductings made impact damper 520 be in disabled state and can't carry out transition along with the output of level shifter 510.After level shifter 510 is finished transition, switch S 16 conductings, impact damper 520 carries out corresponding transition action according to the output of level shifter 510 again.In addition, referring again to the driving circuit 501 of Fig. 5 (b), switch S 17 is coupled between impact damper 520 and the operating voltage VSS, and its principle of operation is similar, does not add tired stating at this.
Please refer to Fig. 5 (c), driving circuit 502 is the situation of high-voltage level for low-voltage level conversion.Driving circuit 502 comprises bolt-lock unit 531, low pressure buffer device 533, level shifter 535, impact damper 537,539 and switch S 20, S21 and S22.Wherein, switch S 20 is coupled between the power end of operating voltage VDD and impact damper 537, and switch S 20 is in order to the power supply supply time of controller buffer 537.When level shifter 535 carried out transition, switch S 20 not conductings made impact damper 537 be in disabled state and can't carry out transition along with the output of level shifter 535.After level shifter 535 is finished transition, switch S 20 conductings, impact damper 537 carries out corresponding transition action according to the output of level shifter 535 again.The output voltage VO UT of impact damper 537 more must produce output voltage VO UT ' through impact damper 539.Switch S 21 mainly is to prevent that impact damper 537,539 from carrying out transition simultaneously, and for example at switch S actuating switch S21 again after 20 conducting a period of times, and switch S 22 mainly is the state that produces suspension joint at the input end of avoiding impact damper 539.In addition, please refer to Fig. 5 (d), the similar driving circuit 502 of its circuit framework.Both main difference are that driving circuit 503 utilizes switch S 23 to come the power supply supply time of controller buffer 537, and utilize switch S 25 to avoid impact damper 539 to produce suspension joint.The foregoing description is also applicable to the situation that is converted to low voltage level by high-voltage level, has in the present technique field and knows the knowledgeable usually, should know by inference easily via exposure of the present invention, do not add tired stating at this.
Fig. 6 is driving circuit figure according to another embodiment of the present invention.In the present embodiment, utilize resistance R 1, R2 to reduce the electric current of impact damper institute conducting, produce big electric current to avoid driving circuit 600.Driving circuit 600 comprises bolt-lock unit 605, level shifter 610, impact damper 620, resistance R 1, R2 and switch S 18, S19.Wherein, switch S 18 and resistance R 1 coupled in parallel are between operating voltage VDD and impact damper 620, and switch S 19 and resistance R 2 coupled in parallel are between impact damper and operating voltage VSS.Switch S 18 and switch S 19 not conducting when level shifter 610 carries out transition, and conducting after level shifter 610 is finished transition are to reduce the electric current that impact damper 620 carries out the conducting of transition time institute.
In the above-described embodiments, only represent to fasten the operating voltage of lock unit, level shifter and impact damper etc. with operating voltage VD, VDD, VS, VSS, but the present invention is not as limit, operating voltage VS, VSS also can be earth terminal or all the other magnitudes of voltage (as negative value), driving circuit of the present invention is suitable equally, does not add tired stating at this.
Comprehensively above-mentioned, because impact damper of the present invention and level shifter can not carry out transition simultaneously, allow impact damper after level shifter is finished transition, just carry out corresponding transition action.Because the transition of level shifter and impact damper is not simultaneously, therefore can reduce the leakage current of driving circuit when transition, use the transition ability of promoting driving circuit.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any affiliated technical field has knows the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion as the claim person of defining that look the application.
Claims (20)
1. driving circuit comprises:
One level shifter is in order to change the voltage level of an input voltage;
One impact damper; And
One first switch is coupled between this level shifter and this impact damper;
Wherein, this first switch not conducting when this level shifter carries out transition, and conducting after this level shifter is finished transition.
2. driving circuit as claimed in claim 1, more comprise a second switch, this impact damper receives an operating voltage as power supply, this second switch is coupled between the input end of this operating voltage and this impact damper, wherein, when this first switch conduction, this not conducting of second switch, when this not conducting of first switch, this second switch conducting.
3. driving circuit as claimed in claim 1 more comprises a second switch, is coupled between the input end of an earth terminal and this impact damper, wherein, when this first switch conduction, this not conducting of second switch, when this not conducting of first switch, this second switch conducting.
4. driving circuit as claimed in claim 1 more comprises:
One low pressure buffer device, according to this input voltage, export one first input voltage and with anti-phase one second input voltage of this first input voltage to this level shifter, to change the voltage level of this input voltage.
5. driving circuit as claimed in claim 1, wherein, this driving circuit is according to the potential change of this input voltage, optionally this first switch of conducting.
6. driving circuit as claimed in claim 1 more comprises a bolt-lock unit, in order to exporting this input signal to this level shifter, and controls this first switch according to this.
7. circuit as claimed in claim 1, wherein, this impact damper is a phase inverter.
8. driving circuit comprises:
One level shifter is in order to change the voltage level of an input voltage;
One first impact damper and one second impact damper;
One first switch is coupled between this level shifter and this first impact damper; And
One second switch couples between this first impact damper and one second impact damper;
Wherein, this first switch and the not conducting when this level shifter carries out transition of this second switch, and conducting after this level shifter is finished transition.
9. driving circuit as claimed in claim 8 wherein, more comprises one the 3rd switch, be coupled between the input end of an operating voltage and this first impact damper, wherein, when this first switch conduction, the 3rd not conducting of switch, when this not conducting of first switch, the 3rd switch conduction.
10. driving circuit as claimed in claim 8 wherein, more comprises one the 3rd switch, be coupled between the input end of an earth terminal and this first impact damper, wherein, when this first switch conduction, the 3rd not conducting of switch, when the 3rd not conducting of switch, this second switch conducting.
11. driving circuit as claimed in claim 8 wherein, more comprises one the 3rd switch, be coupled between the input end of an operating voltage and this second impact damper, wherein, when this first switch conduction, the 3rd not conducting of switch, when this not conducting of first switch, the 3rd switch conduction.
12. driving circuit as claimed in claim 8 wherein, more comprises one the 3rd switch, be coupled between the input end of an earth terminal and this second impact damper, wherein, when this second switch conducting, the 3rd not conducting of switch, when this not conducting of second switch, the 3rd switch conduction.
13. driving circuit as claimed in claim 8, wherein, this driving circuit is according to the potential change of this input voltage, optionally this first switch of conducting and this second switch.
14. driving circuit as claimed in claim 8 more comprises a bolt-lock unit, in order to exporting this input signal to this level shifter, and controls this first switch and this second switch according to this.
15. driving circuit as claimed in claim 8, wherein, the conducting in regular turn after this level shifter is finished transition of this first switch and this second switch.
16. a driving circuit comprises:
One level shifter is in order to change the voltage level of an input voltage;
One first impact damper is coupled to the output terminal of this level shifter; And
One first switch is coupled between the power end of an operating voltage and this first impact damper, in order to control the power supply supply time of this first impact damper;
Wherein, this first switch not conducting when this level shifter carries out transition, and conducting after this level shifter is finished transition.
17. driving circuit as claimed in claim 16 wherein, more comprises:
One second switch has first end and second end, and first end of this second switch couples the output terminal of this first impact damper;
One second impact damper, the input end of this second impact damper are coupled to second end of this second switch; And
One the 3rd switch is coupled between the input end of this operating voltage and this second impact damper;
Wherein, during this first switch conduction, this second switch conducting makes second impact damper receive the output of this first impact damper, when this second switch conducting, and the 3rd not conducting of switch, when this not conducting of second switch, the 3rd switch conduction.
18. a driving circuit comprises:
One level shifter is in order to change the voltage level of an input voltage;
One first impact damper is coupled to the output terminal of this level shifter; And
One first switch is coupled between an earth terminal and this first impact damper;
Wherein, this first switch not conducting when this level shifter carries out transition, and conducting after this level shifter is finished transition.
19. driving circuit as claimed in claim 18 wherein, more comprises:
One second switch has first end and second end, and first end of this second switch couples the output terminal of this first impact damper;
One second impact damper, the input end of this second impact damper are coupled to second end of this second switch; And
One the 3rd switch is coupled between the input end of this earth terminal and this second impact damper;
Wherein, during this first switch conduction, this second switch conducting makes second impact damper receive the output of this first impact damper, when this second switch conducting, and the 3rd not conducting of switch, when this not conducting of second switch, the 3rd switch conduction.
20. a driving circuit comprises:
One level shifter is in order to change the voltage level of an input voltage;
One impact damper, be coupled to the output terminal of this level shifter and operate in an operating voltage and an earth terminal between;
One first resistance couples between this operating voltage and this impact damper;
One second resistance is coupled between this earth terminal and this impact damper;
One first switch is parallel to this first resistance; And
One second switch is parallel to this second resistance;
Wherein, this first switch and the not conducting when this level shifter carries out transition of this second switch, and conducting after this level shifter is finished transition are to reduce the electric current that this impact damper carries out the conducting of transition time institute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710096629A CN100580752C (en) | 2007-04-19 | 2007-04-19 | Drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710096629A CN100580752C (en) | 2007-04-19 | 2007-04-19 | Drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101290738A true CN101290738A (en) | 2008-10-22 |
| CN100580752C CN100580752C (en) | 2010-01-13 |
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ID=40034976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710096629A Expired - Fee Related CN100580752C (en) | 2007-04-19 | 2007-04-19 | Drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100580752C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195635A (en) * | 2010-03-04 | 2011-09-21 | 联咏科技股份有限公司 | Output buffer circuit capable of improving stability |
-
2007
- 2007-04-19 CN CN200710096629A patent/CN100580752C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195635A (en) * | 2010-03-04 | 2011-09-21 | 联咏科技股份有限公司 | Output buffer circuit capable of improving stability |
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| Publication number | Publication date |
|---|---|
| CN100580752C (en) | 2010-01-13 |
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