CN103064496B - The control circuit of power supply output - Google Patents
The control circuit of power supply output Download PDFInfo
- Publication number
- CN103064496B CN103064496B CN201210563755.3A CN201210563755A CN103064496B CN 103064496 B CN103064496 B CN 103064496B CN 201210563755 A CN201210563755 A CN 201210563755A CN 103064496 B CN103064496 B CN 103064496B
- Authority
- CN
- China
- Prior art keywords
- coupled
- circuit
- switch module
- power supply
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention provides the control circuit that a kind of power supply exports, comprising: controlled circuit, it has the first end, the second end and the 3rd end；Output circuit, it has the first end and in order to export the second end of the first power supply signal；First input circuit, its first end having to receive the first control signal and the second end；And second input circuit, its the first end having to receive the second control signal and in order to export the second end of second source signal, wherein, second end of this first input circuit and the second end of this second input circuit, being respectively coupled to the first end and second end of this controlled circuit, the 3rd end of this controlled circuit is coupled to the first end of this output circuit.The control circuit of the power supply output of the present invention can provide its required power supply to reduce the inconvenience of user with main frame when being connected with external device (ED) or equipment (such as CRT monitor, liquid crystal display or scialyscope) simultaneously.
Description
Technical field
The present invention, about a kind of control circuit, refers in particular to the control circuit exported about a kind of power supply.
Background technology
Along with a large amount of development and the universalness of the electronic installation products such as PC, notebook computer or panel computer, and the external device (ED)s such as miscellaneous external or terminal or equipment also get more and more.But, need traditionally to use plurality of transformator or power line to provide power supply to give external device (ED) or equipment, so, there is higher cost and the shortcoming additionally taken up room.
Wherein, display device, such as CRT monitor, liquid crystal display or scialyscope, its major function is show image, it is said that in general, be provided with an image input adapter, such as D-sub joint or VGA joint on a side surface of display device, its main purpose is that the image out splice going splice (D-sub joint or VGA joint) with a main frame combines, in order to receive the signal of video signal that this signal source of supply is exported.
But, display device itself have to can perform image display through the power supply supply of extra transformator or power line, but the image out splice going splice of current all of main frame (including D-sub joint or VGA joint) does not the most have function of supplying power, therefore the necessary external transformer of display device or power line, to supply the power supply requirement of display device, its result will result in user inconvenience on using, and the cost that maker is on manufacturing increases.
Thus, how the control circuit of a kind of power supply output is set in main frame, in order to solve above-mentioned the problems of the prior art, has become the technical problem that practitioner in the art is urgently to be resolved hurrily in fact.
Summary of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide the control circuit of a kind of power supply output, is used for solving prior art Computer main frame and uses the problems such as inconvenience when being connected with external device (ED).
For achieving the above object and other relevant purposes, the present invention provides the control circuit that a kind of power supply exports, described control circuit to include: controlled circuit, and it has the first end, the second end and the 3rd end；Output circuit, it has the first end and in order to export the second end of the first power supply signal；First input circuit, its first end having to receive the first control signal and the second end；And second input circuit, its the first end having to receive the second control signal and in order to export the second end of second source signal, wherein, second end of this first input circuit and the second end of this second input circuit, being respectively coupled to the first end and second end of this controlled circuit, the 3rd end of this controlled circuit is coupled to the first end of this output circuit.
The present invention reoffers the control circuit of a kind of power supply output, and described control circuit includes: the first switch module, second switch assembly, the 3rd switch module, diode, first input end, the second input, the first outfan and the second outfan；Wherein the first end of this first switch module is coupled to this first input end, in order to be received from the first control signal of this first input end input, second end of this first switch module is coupled to the second end of the 3rd switch module, and the 3rd end of this first switch module is coupled to earth terminal；Wherein the first end of this second switch assembly is coupled to this second input, in order to be received from the second control signal of this second input input, second end of this second switch assembly is coupled to system power supply, and the 3rd end of this second switch assembly is coupled to this earth terminal；Wherein the first end of the 3rd switch module is coupled to the second end of this second switch assembly, and the second end of the 3rd switch module is coupled to this first outfan, and the 3rd end of the 3rd switch module is coupled to system power supply；And this diode, it is coupled between the first end of this second switch assembly and this second outfan.
As it has been described above, the control circuit of the power supply output of the present invention, its required power supply can be provided to reduce the inconvenience of user with main frame when being connected with external device (ED) or equipment (such as CRT monitor, liquid crystal display or scialyscope) simultaneously.
Accompanying drawing explanation
Fig. 1 is the block chart of the control circuit according to one of present invention example.
Fig. 2 is the circuit diagram of the control circuit according to one of present invention example.
Fig. 3 A is the flow chart of the operational approach of the control circuit according to one of present invention example.
Fig. 3 B is the flow chart of another operational approach of the control circuit according to one of present invention example.
Element numbers explanation
100: control circuit
110: input circuit
120: input circuit
130: controlled circuit
140: output circuit
200: control circuit
210: input circuit
220: input circuit
230: controlled circuit
240: output circuit
A1, b1, c1, d1: the first end
A2, b2, c2, d2: the second end
C3: the three end
C1: electric capacity
D: drain electrode
D1: diode
FS1: fuse switch
G: grid
I1: input
I2: input
O1: outfan
O2: outfan
Q1, Q2, Q3: transistor
R1, R2, R3, R4, R5: resistance
S: source electrode
P3V3_STBY: cresset display device
VIN: system power supply
Detailed description of the invention
Reference will now be made in detail present invention example of explanation in alterations.To the greatest extent its may, all graphic middle by according to identical element numbers to represent same or similar parts.
When and when reading with each alterations, the detailed description of the preferable example of the present invention can be better understood upon.It will be appreciated that the present invention is not limited to accurate be set with mode and the apparatus painted.Furthermore, it will be understood that to simple and clear in order to illustrate, be shown in graphic in assembly be not necessarily to scale relative to each other.Such as, in order to clearly show that details in figure, the size of some assembly may have been amplified relative to other assemblies.
Fig. 1 is the block chart of the control circuit 100 according to the present invention one example.Control circuit 100 can comprise input circuit 110, input circuit 120, controlled circuit 130 and output circuit 140, wherein this controlled circuit 130 is respectively coupled to this input circuit 110 and this input circuit 120, to receive respectively from input circuit 110 and one first signal of input circuit 120 and a secondary signal, and judge whether to be sent to be coupled to by a power output signal output circuit 140 of controlled circuit 130.If output circuit 140 receives the power output signal from controlled circuit 130, then output circuit 140 exports a rated voltage or electric current to a load；Otherwise this output circuit 140 does not export offer any voltage or electric current.
Next the circuit implementation of control circuit 100 is further illustrated, please refer to the circuit diagram that Fig. 1 and Fig. 2, Fig. 2 are the control circuit 200 according to the present invention one example.Refer to Fig. 2, control circuit 200 can comprise controlled circuit 230, and it has the first end c1, the second end c2 and the 3rd end c3；Output circuit 240, it has the first end d1, and in order to export the second end d2 of one first power supply signal；Input circuit 210, its first end a1 having to receive one first control signal, and the second end a2；And input circuit 220, its the first end b1 having to receive one second control signal, and in order to export the second end b2 of a second source signal, the wherein second end a2 and the second end b2 of input circuit 220 of this input circuit 210, being respectively coupled to the first end c1 and the second end c2 of controlled circuit 230, the 3rd end c3 of controlled circuit 230 is coupled to the first end d1 of output circuit 240.
The first end that wherein input circuit 210 comprises switch module Q1, switch module Q1 is coupled to the first end a1 of this input circuit 210, and the 3rd end of switch module Q1 is coupled to an earth terminal；And resistance R1, between its second end being coupled to switch module Q1 and the second end a2 of input circuit 210, the resistance of resistance R1 can be in the present embodiment but be not limited to a kilooersted nurse (1K Ω).
Wherein input circuit 220 comprises resistance R2, and it is coupled between the first end b1 of input circuit 220 and a cresset display device (P3V3_STBY), and the resistance of resistance R2 can be in the present embodiment but be not limited to 1K Ω；3rd resistance R3, it is coupled between the first end b1 and this earth terminal of input circuit 220, and the resistance of resistance R3 can be in the present embodiment but be not limited to 1M Ω；Resistance R4, it is coupled between the first end b1 of input circuit 220 and the second end b2 of input circuit 220, and the resistance of resistance R4 can be in the present embodiment but be not limited to 33 Ω；And diode D1, this diode D1 positive terminal (+) be coupled to the second end b2, this diode D1 of input circuit 220 negative pole end (-) be used for export this second source signal.
The first end that wherein controlled circuit 230 comprises switch module Q2, switch module Q2 is coupled to the second end c2 of controlled circuit 230, and the 3rd end of switch module Q2 is coupled to an earth terminal；Resistance R5, it is coupled between second end of switch module Q2 and system power supply VIN, and the resistance of resistance R5 can be in the present embodiment but be not limited to 10K Ω；And first end of switch module Q3, switch module Q3 is coupled to second end of switch module Q2, second end of switch module Q3 is coupled to the first end and the 3rd end c3 of controlled circuit 230, and the 3rd end of switch module Q3 is coupled to this system power supply VIN.
Wherein output circuit 240 comprises electric capacity C1, and it is coupled between the first end d1 and the earth terminal of output circuit 240, and the capacitance of electric capacity C1 can be in the present embodiment but be not limited to 1 μ F；And fuse switch FS1, it is coupled between the first end b1 of output circuit 240 and the second end b2.
Above-mentioned switch module Q1, Q2 and Q3 can be but be not limited to NMOS field-effect transistor, PMOS field-effect transistor, Bipolar transistor or other.And when above-mentioned switch module uses NMOS or PMOS, the most corresponding grid of NMOS or PMOS of the first end of above-mentioned switch module, the second end and the 3rd end, drain electrode and source electrode.
Fig. 3 A and 3B is the flow chart of the operational approach of the control circuit according to the present invention one example.Referring to Fig. 2 Yu Fig. 3 A, in step 301, the input i1 of input circuit 210 receives one first control signal；In step 302, when input i1 receives this first control signal, judge that this first control signal is high levle or low level, if high levle, in step 303, turn on switch module Q1, the most whether the 3rd switch module Q3 turns on, in step 308, the outfan o1 of output circuit 240 exports without any power supply signal, then terminate whole control flow；If the first control signal is low level, the most in step 304, switch module Q1 is ended, then in step 305, when input i2 reception one second control signal of input circuit 220 is low level, within step 306, the outfan o2 of input circuit 220 is because of low level, therefore the output of non-transformer signal, in step 307, also because of low level, and ending switch module Q2, then switch module Q3 is also switched off, in step 308, the outfan o1 of output circuit 240 exports without any power supply signal, then terminate whole control flow.
Next referring to Fig. 2 Yu Fig. 3 B, in step 401, when input i1 reception one first control signal of input circuit 210 is low level, the most in step 402, switch module Q1 is ended, then in step 403, when input i2 reception one second control signal of input circuit 220 is high levle, in step 404, because first end of switch module Q2 is high levle, therefore outfan o2 exports a second source signal, the most in step 405, also because this second control signal is high levle, then switch module Q2 conducting, then switch module Q3 is also switched on, therefore in a step 406, this outfan o1 exports one first power supply signal, set complete, then terminate whole control flow.
When illustrating the representative example of the present invention, the operational approach of the present invention and/or process may be rendered as the step of a particular sequence by this specification.But, owing to the method or process are not rely on the particular order of this step herein, thus the method or process are not intended to be limited to the particular sequence of this step.Usual skill in technique should be understood that the step that also can use other sequences.Therefore, the particular order of this step of this specification is not construed as being the restriction to claim.Additionally, be not intended to be limited to perform its each step with this order about the method for the present invention and/or the claim of process, and those skilled in the art can be readily understood upon, and such sequence can be varied from and still fall within the spirit and scope of the present invention.
Those skilled in the art should be understood that under the conditions of without departing substantially from the extensive inventive concept of examples detailed above, such example can be made change.It will be understood, therefore, that the present invention is not limited only to disclosed instantiation, but it is intended to belong to all modifications in the spirit and scope of the present invention defined in claims of the present invention.
Claims (8)
1. the control circuit of a power supply output, it is characterised in that described control circuit includes:
Controlled circuit, it has the first end, the second end and the 3rd end；
Output circuit, it has the first end and in order to export the second end of the first power supply signal；
First input circuit, its first end having to receive the first control signal and the second end；And
Second input circuit, its first end having to receive the second control signal and in order to export the second end of second source signal,
Wherein, the second end of this first input circuit and the second end of this second input circuit, it is respectively coupled to the first end and second end of this controlled circuit, the 3rd end of this controlled circuit is coupled to the first end of this output circuit；
Described first input circuit includes the first switch module, and the first end of this first switch module is coupled to the first end of this first input circuit, and the 3rd end of this first switch module is coupled to earth terminal；And
Described controlled circuit includes second switch assembly, and the first end of this second switch assembly is coupled to the second end of this controlled circuit, and the 3rd end of this second switch assembly is coupled to earth terminal；
Described controlled circuit also includes the 3rd switch module, and the first end of the 3rd switch module is coupled to the second end of this second switch assembly；
Wherein, this first control signal is low level, and when this second control signal is high levle, then this first switch module cut-off, the first end of this second switch assembly is high levle, and this second outfan exports a second source signal；
This first control signal is low level, and when this second control signal is high levle, then the cut-off of this first switch module, this second switch element turns, the 3rd switch module is also switched on, this first outfan output one first power supply signal.
The control circuit of power supply the most according to claim 1 output, it is characterised in that: this first input circuit also includes:
First resistance, it is coupled between the second end of this first switch module and the second end of this first input circuit.
The control circuit of power supply the most according to claim 1 output, it is characterised in that: this second input circuit includes:
Second resistance, it is coupled between the first end of this second input circuit and cresset display device；
3rd resistance, it is coupled between the first end of this second input circuit and this earth terminal；
4th resistance, it is coupled between the first end of this second input circuit and the second end of this second input circuit；And
Diode, the positive terminal of this diode is coupled to the second end of this second input circuit, and the negative pole end of this diode is used for exporting this second source signal.
The control circuit of power supply the most according to claim 1 output, it is characterised in that: this controlled circuit also includes:
5th resistance, it is coupled between the second end of this second switch assembly and the first power supply；And
Second end of the 3rd switch module is coupled to the first end and the 3rd end of this controlled circuit, and the 3rd end of the 3rd switch module is coupled to the second power supply.
The control circuit of power supply the most according to claim 4 output, it is characterised in that:
This second switch assembly is NMOS field-effect transistor, and the first end of this second switch assembly, the second end and the 3rd end are respectively to should the grid of NMOS field-effect transistor, drain electrode and source electrode；
3rd switch module is PMOS field-effect transistor, and the first end of the 3rd switch module, the second end and the 3rd end are respectively to should the grid of PMOS field-effect transistor, drain electrode and source electrode；
This first power supply and this second power supply are system power supply.
The control circuit of power supply the most according to claim 1 output, it is characterised in that: this output circuit includes:
Electric capacity, it is coupled between the first end of this output circuit and this earth terminal；And
Fuse switch, it is coupled between the first end of this output circuit and the second end.
7. the control circuit of a power supply output, it is characterised in that described control circuit includes:
First switch module, second switch assembly, the 3rd switch module, diode, first input end, the second input, the first outfan and the second outfan；
Wherein the first end of this first switch module is coupled to this first input end, in order to be received from the first control signal of this first input end input, second end of this first switch module is coupled to the second end of the 3rd switch module, and the 3rd end of this first switch module is coupled to earth terminal；
Wherein the first end of this second switch assembly is coupled to this second input, in order to be received from the second control signal of this second input input, second end of this second switch assembly is coupled to system power supply, and the 3rd end of this second switch assembly is coupled to this earth terminal；
Wherein the first end of the 3rd switch module is coupled to the second end of this second switch assembly, and the second end of the 3rd switch module is coupled to this first outfan, and the 3rd end of the 3rd switch module is coupled to system power supply；And
This diode, is coupled between the first end of this second switch assembly and this second outfan；
Wherein, this first control signal is low level, and when this second control signal is high levle, then this first switch module cut-off, the first end of this second switch assembly is high levle, and this second outfan exports a second source signal；
This first control signal is low level, and when this second control signal is high levle, then the cut-off of this first switch module, this second switch element turns, the 3rd switch module is also switched on, this first outfan output one first power supply signal.
The control circuit of power supply the most according to claim 7 output, it is characterized in that: this first switch module and this second switch assembly are NMOS field-effect transistor, this first switch module and its respective first end of this second switch assembly, the second end and the 3rd end are respectively to should the grid of NMOS field-effect transistor, drain electrode and source electrode；Wherein the 3rd switch module is PMOS field-effect transistor, and the first end of the 3rd switch module, the second end and the 3rd end are respectively to should the grid of PMOS field-effect transistor, drain electrode and source electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210563755.3A CN103064496B (en) | 2012-12-21 | 2012-12-21 | The control circuit of power supply output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210563755.3A CN103064496B (en) | 2012-12-21 | 2012-12-21 | The control circuit of power supply output |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103064496A CN103064496A (en) | 2013-04-24 |
| CN103064496B true CN103064496B (en) | 2016-08-03 |
Family
ID=48107151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210563755.3A Active CN103064496B (en) | 2012-12-21 | 2012-12-21 | The control circuit of power supply output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103064496B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112139065A (en) * | 2020-09-16 | 2020-12-29 | 华兰生物工程重庆有限公司 | Sorting system and sorting method for raw material plasma |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1379331A (en) * | 2001-04-02 | 2002-11-13 | 华邦电子股份有限公司 | Method and circuit for automatically detecting and using image output terminal |
| TW201023157A (en) * | 2008-12-12 | 2010-06-16 | Innolux Display Corp | Liquid crystal display device connecting external image signal source |
| CN102034445A (en) * | 2009-09-28 | 2011-04-27 | 群康科技(深圳)有限公司 | Power supply circuit of liquid crystal display |
| EP2536010A2 (en) * | 2011-06-14 | 2012-12-19 | Samsung Electro-Mechanics Co., Ltd | Power generating circuit and switching circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI443500B (en) * | 2008-06-30 | 2014-07-01 | Asustek Comp Inc | Power supply system, computer thereof and power supplying method of computer |
-
2012
- 2012-12-21 CN CN201210563755.3A patent/CN103064496B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1379331A (en) * | 2001-04-02 | 2002-11-13 | 华邦电子股份有限公司 | Method and circuit for automatically detecting and using image output terminal |
| TW201023157A (en) * | 2008-12-12 | 2010-06-16 | Innolux Display Corp | Liquid crystal display device connecting external image signal source |
| CN102034445A (en) * | 2009-09-28 | 2011-04-27 | 群康科技(深圳)有限公司 | Power supply circuit of liquid crystal display |
| EP2536010A2 (en) * | 2011-06-14 | 2012-12-19 | Samsung Electro-Mechanics Co., Ltd | Power generating circuit and switching circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103064496A (en) | 2013-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107807893A (en) | USB c-type module | |
| CN107316598B (en) | Hot-plug short circuit control device and method | |
| CN101131487A (en) | Power supply circuit and LCD using the same | |
| CN109410824A (en) | Display device drive system and display-apparatus driving method | |
| CN102213974A (en) | Computer motherboard | |
| CN205211235U (en) | Large -scale road maintaining tamping car teaching platform | |
| CN101546216A (en) | Reset circuit | |
| CN106849638B (en) | A kind of power circuit and liquid crystal display | |
| CN202435503U (en) | Liquid crystal display (LCD) screen circuit and television | |
| CN103064496B (en) | The control circuit of power supply output | |
| CN103869885A (en) | Expansion card and mainboard supporting expansion card | |
| CN210431637U (en) | Device for realizing double-screen different display function | |
| CN105676986A (en) | Interface switching system for electronic equipment | |
| CN104038207A (en) | Switchover circuit and electronic device | |
| CN207233362U (en) | A kind of LED display power supply module, LED display control system and LED display | |
| CN108172178B (en) | Power supply circuit of time schedule controller and liquid crystal display device | |
| CN112750388A (en) | Test method | |
| CN213126208U (en) | Signal switching device and system | |
| CN103064518B (en) | Video interface with power supply function and operation method thereof | |
| CN101998033A (en) | Electronic equipment and mother board thereof | |
| CN104252216A (en) | Anti-creeping USB (universal serial bus) power supply circuit | |
| CN105676948A (en) | Power conditioning circuit and all-in-one machine provided with power conditioning circuit | |
| US20130171841A1 (en) | Test device for testing usb sockets | |
| CN103929061A (en) | Constant flow source with single power supply adjustable | |
| CN105679218A (en) | Time delay circuit and test tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |