CN104122968A - Quick discharging device - Google Patents
Quick discharging device Download PDFInfo
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- CN104122968A CN104122968A CN201310143335.4A CN201310143335A CN104122968A CN 104122968 A CN104122968 A CN 104122968A CN 201310143335 A CN201310143335 A CN 201310143335A CN 104122968 A CN104122968 A CN 104122968A
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- effect transistor
- field effect
- resistance
- capacitor
- drain electrode
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- 238000007599 discharging Methods 0.000 title abstract description 3
- 230000005669 field effect Effects 0.000 claims abstract description 93
- 239000003990 capacitor Substances 0.000 claims abstract description 21
- 230000008676 import Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The invention provides a quick discharging device which comprises a first field-effect transistor, a second field-effect transistor, a first capacitor, a diode, a third field-effect transistor and a second capacitor. A grid of the first field-effect transistor is connected with one end of a first resistor, a drain of the first field-effect transistor is connected with a grid of the second field-effect transistor and one end of a third resistor, a source of the second field-effect transistor is connected with a voltage output end, and a source of the first field-effect transistor is connected with the ground. A positive pole of the first capacitor is connected with a drain of the second field-effect transistor, and a negative pole of the first capacitor is connected with a fourth resistor. A positive pole of the diode is connected with the drain of the second field-effect transistor and one end of the fourth resistor, and the negative pole of the diode is connected with one end of a fifth resistor. A grid of the third field-effect transistor is connected with a grid of the fifth resistor and one end of a sixth resistor, a source of the third field-effect transistor is connected with one end of a seventh resistor, and a drain of the third field-effect transistor is connected with the ground. A positive pole of the second capacitor is connected with the drain of the second field-effect transistor, and a negative pole of the second capacitor is connected with the ground.
Description
[Ji Intraoperative field]
The present invention relates to a kind of rapid discharge equipment, can be applicable to PC, notebook computer and computer peripheral device.
[Bei Jing Ji Intraoperative]
In Circuits System, due to the difference of each element work schedule in circuit, and discrete capacitive coupling between circuit and earth terminal, therefore finish after powered-down in system works, need to have and make a time delay operating voltage of system be down to 0 volt, taking computer equipment as example, its system obtains operating voltage about 3.3-5 volt, when approximately needing the time delay of 2 seconds after system closing, just can make operating voltage be down to 0 volt.
Fig. 1 is discharge time and the voltage relationship figure of the discharge circuit of known computer equipment, and as shown in the figure, after computer equipment shutdown, its voltage can be by operating voltage V
0decline, until time delay T
2just can be down to 0 volt.If at the T time delay of computer equipment powered-down
2inside again start system, that is in time T
1again start system and T
1<T
2, because time delay T
2interior voltage is not yet down to 0 volt, still has voltage to exist in the system of computer equipment, when restarting systems, and the surge voltage V of moment formation that not exclusively the remaining voltage of electric discharge can start with voltage that power supply unit provides
p, this surge voltage V
pthe System Operation mistake that easily causes computer equipment, even causes the infringement of computer equipment, for example: storage failure, loudspeaker produce noise.
In sum, how to improve the discharge circuit of computer equipment, make computer equipment be able to electric discharge rapid and safety, be still one and wait the technical task solving.
[summary of the invention]
Therefore, object of the present invention is mainly to provide a kind of discharge circuit that improves computer equipment, makes the computer equipment rapid discharge equipment of electric discharge rapidly.
For achieving the above object, the invention provides a kind of rapid discharge equipment, comprising:
Voltage input end, is connected to power supply;
The first field effect transistor and the second field effect transistor, the grid of described the first field effect transistor connects one end of one first resistance, the other end of this first resistance connects this voltage input end, the drain electrode of this first field effect transistor connects one end of grid and one the 3rd resistance of this second field effect transistor, the source electrode of this second field effect transistor connects this voltage output end, and the source electrode of this first field effect transistor is connected with ground; The first capacitor, its positive pole is connected with the drain electrode of described the second field effect transistor, and its negative pole is connected with one the 4th resistance;
Diode, the positive pole of this diode is connected with one end of the 4th resistance with the drain electrode of described the second field effect transistor, and the negative pole of this diode is connected with one end of one the 5th resistance;
The 3rd field effect transistor, the grid of its grid and the 5th resistance and one the 6th resistance one end be connected, the source electrode of described the 3rd field effect transistor is connected with one end of one the 7th resistance, drain electrode be connected;
The second electric capacity, its positive pole is connected with the drain electrode of this second field effect transistor, and its negative pole is connected with ground.
Especially, described the first field effect transistor is N channel enhancement field effect transistor, and described the second field effect transistor and the 3rd field effect transistor are P-channel enhancement type field effect transistor.
Especially, described rapid discharge equipment has two states:
The first state, described the first field effect transistor and the second field effect transistor conducting, the first capacitor and the charging of the second capacitor, the 3rd field effect transistor is turn-offed, diode reverse cut-off, now this load is normally worked;
The second state, after this load is closed, described the 3rd field effect transistor conducting, diode forward conducting, the first field effect transistor and the second field effect transistor are turn-offed, the first capacitor and the second capacitor discharge, now the operating voltage at these load two ends imports earth terminal, and this load is closed.
Compared to prior art, rapid discharge equipment of the present invention, has improved the discharge circuit of computer equipment, has solved the drawback of discharge delay in prior art, the discharge time while effectively having shortened computer equipment system closing, has improved operational efficiency.
[brief description of the drawings]
Fig. 1 is discharge time and the voltage relationship figure of the discharge circuit of the computer equipment of prior art;
Fig. 2 is the circuit diagram of rapid discharge equipment of the present invention.
[embodiment]
Below, by reference to the accompanying drawings shown in, specific embodiments of the invention are elaborated:
The invention provides a kind of discharge circuit that improves computer equipment, make the computer equipment rapid discharge equipment of electric discharge rapidly, refer to Fig. 2, is the circuit diagram of rapid discharge equipment of the present invention, as shown in the figure, comprising:
Voltage input end V
1, be connected to power supply;
The first field effect transistor 31 and the second field effect transistor 32, the grid of described the first field effect transistor 31 connects one first resistance R
1one end, this first resistance R
1the other end connect this voltage input end V
1, the drain electrode of this first field effect transistor 31 connects grid and one the 3rd resistance R of this second field effect transistor 32
3one end, the source electrode of this second field effect transistor 32 connects this voltage output end V
1, the source electrode of this first field effect transistor 31 is connected with ground;
The first capacitor 34, its positive pole is connected with the drain electrode of described the second field effect transistor 32, its negative pole and one the 4th resistance R
4connect;
Diode 36, the drain electrode of the positive pole of this diode 36 and described the second field effect transistor 32 and the 4th resistance R
4one end be connected, the negative pole of this diode 36 and one the 5th resistance R
5one end connect;
The 3rd field effect transistor 33, its grid and the 5th resistance R
5grid and one the 6th resistance R
6one end connect, the source electrode of described the 3rd field effect transistor 33 and one the 7th resistance R
7one end connect, drain electrode be connected;
The second electric capacity 35, its positive pole is connected with the drain electrode of this second field effect transistor 32, and its negative pole is connected with ground.
In the present embodiment, described the first field effect transistor 31 is N channel enhancement field effect transistor, and described the second field effect transistor 32 and the 3rd field effect transistor 33 are P-channel enhancement type field effect transistor, and described load 2 is a computer equipment.
In the present embodiment, this voltage input end V
1connect one first resistance R
1one end, this first resistance R
1the other end connect one second resistance R
2one end, this second resistance R
2the other end with ground be connected; The 3rd resistance R
3the other end connect voltage output end; The 4th resistance R
4the other end with ground be connected; The 6th resistance R
6the other end be connected with the drain electrode of described the second field effect transistor; The 7th resistance R
7the other end be connected with the drain electrode of described the second field effect transistor.
In the present embodiment, described rapid discharge equipment has two states:
The first state, as described voltage input end V
1when access voltage, this first field effect transistor 31 is high level, this second field effect transistor 32 is low level, therefore described the first field effect transistor 31 and the second field effect transistor 32 conductings, and the 3rd field effect transistor 33 is high level, therefore the 3rd field effect transistor 33 is turn-offed, and diode 36 oppositely ends, now the first capacitor 34 and the second capacitor 35 charge, and this load 2 is normally worked;
The second state, as described voltage input end V
1while not accessing voltage, this first field effect transistor 31 is low level, this second field effect transistor 32 is high level, therefore this first field effect transistor 31 and the second field effect transistor 32 are turn-offed, and the 3rd field effect transistor 33 is low level, therefore the 3rd field effect transistor 33 conductings, diode 36 forward conductions, the first capacitor 34 and the second capacitor 35 discharge, due to R
7be the resistance that a resistance is very little, the operating voltage at these load 2 two ends imports rapidly earth terminal.
Rapid discharge equipment of the present invention, in the time of the voltage of off voltage input end, can rapidly the operating voltage at computer equipment two ends be imported to earth terminal, can shorten because of the computer equipment time delay causing of discharging, therefore after this computer equipment is closed, restart at once the harmful effect that this rapid discharge equipment can avoid surge voltage to produce computer equipment system.Rapid discharge equipment of the present invention does not affect the normal work of the system of computer equipment simultaneously, therefore can avoid unnecessary power attenuation, saves the energy.
By reference to the accompanying drawings the specific embodiment of the present invention and embodiment are described in detail above, but the present invention is not limited to the above-described embodiment and examples, in the ken possessing those skilled in the art, can also make a variety of changes without departing from the inventive concept of the premise.
Claims (5)
1. a rapid discharge equipment, connects a load, it is characterized in that, comprising:
Voltage input end, is connected to power supply;
The first field effect transistor and the second field effect transistor, the grid of described the first field effect transistor connects one end of one first resistance, the other end of this first resistance connects this voltage input end, the drain electrode of this first field effect transistor connects one end of grid and one the 3rd resistance of this second field effect transistor, the source electrode of this second field effect transistor connects this voltage output end, and the source electrode of this first field effect transistor is connected with ground;
The first capacitor, its positive pole is connected with the drain electrode of described the second field effect transistor, and its negative pole is connected with one the 4th resistance;
Diode, the positive pole of this diode is connected with one end of the 4th resistance with the drain electrode of described the second field effect transistor, and the negative pole of this diode is connected with one end of one the 5th resistance;
The 3rd field effect transistor, the grid of its grid and the 5th resistance and one the 6th resistance one end be connected, the source electrode of described the 3rd field effect transistor is connected with one end of one the 7th resistance, drain electrode be connected;
The second electric capacity, its positive pole is connected with the drain electrode of this second field effect transistor, and its negative pole is connected with ground.
2. rapid discharge equipment according to claim 1, is characterized in that, described the first field effect transistor is N channel enhancement field effect transistor, and described the second field effect transistor and the 3rd field effect transistor are P-channel enhancement type field effect transistor.
3. rapid discharge equipment according to claim 1, is characterized in that,
This voltage input end connects one end of one first resistance, and the other end of this first resistance connects one end of one second resistance, and the other end of this second resistance is connected with ground;
The other end of the 3rd resistance connects voltage output end;
The other end of the 4th resistance is connected with ground;
The other end of the 6th resistance is connected with the drain electrode of described the second field effect transistor;
The other end of the 7th resistance is connected with the drain electrode of described the second field effect transistor.
4. rapid discharge equipment according to claim 1, is characterized in that, described rapid discharge equipment has two states:
The first state, described the first field effect transistor and the second field effect transistor conducting, the first capacitor and the charging of the second capacitor, the 3rd field effect transistor is turn-offed, diode reverse cut-off, now this load is normally worked;
The second state, described the 3rd field effect transistor conducting, diode forward conducting, the first field effect transistor and the second field effect transistor are turn-offed, the first capacitor and the second capacitor discharge, now the operating voltage at these load two ends imports earth terminal.
5. rapid discharge equipment according to claim 1, is characterized in that, described load is a computer equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310143335.4A CN104122968A (en) | 2013-04-24 | 2013-04-24 | Quick discharging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310143335.4A CN104122968A (en) | 2013-04-24 | 2013-04-24 | Quick discharging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104122968A true CN104122968A (en) | 2014-10-29 |
Family
ID=51768415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310143335.4A Pending CN104122968A (en) | 2013-04-24 | 2013-04-24 | Quick discharging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104122968A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105867523A (en) * | 2015-01-20 | 2016-08-17 | 鸿富锦精密工业(武汉)有限公司 | Discharging circuit and mainboard using same |
| CN106685200A (en) * | 2016-10-12 | 2017-05-17 | 惠州市安规电子有限公司 | Capacitor quick discharging circuit |
| WO2017219737A1 (en) * | 2016-06-21 | 2017-12-28 | 深圳市九洲电器有限公司 | Discharge circuit and discharge method for set-top box during poweroff |
-
2013
- 2013-04-24 CN CN201310143335.4A patent/CN104122968A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105867523A (en) * | 2015-01-20 | 2016-08-17 | 鸿富锦精密工业(武汉)有限公司 | Discharging circuit and mainboard using same |
| CN105867523B (en) * | 2015-01-20 | 2019-01-22 | 鸿富锦精密工业(武汉)有限公司 | Discharge circuit and main board using the discharge circuit |
| WO2017219737A1 (en) * | 2016-06-21 | 2017-12-28 | 深圳市九洲电器有限公司 | Discharge circuit and discharge method for set-top box during poweroff |
| CN106685200A (en) * | 2016-10-12 | 2017-05-17 | 惠州市安规电子有限公司 | Capacitor quick discharging circuit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141029 |