CN102353857B - Electric signal detection system - Google Patents
Electric signal detection system Download PDFInfo
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- CN102353857B CN102353857B CN 201110186262 CN201110186262A CN102353857B CN 102353857 B CN102353857 B CN 102353857B CN 201110186262 CN201110186262 CN 201110186262 CN 201110186262 A CN201110186262 A CN 201110186262A CN 102353857 B CN102353857 B CN 102353857B
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- test signal
- signal line
- screen layer
- switch
- electric test
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- Testing Relating To Insulation (AREA)
Abstract
The invention provides an electric signal detection system which comprises a power-up test signal wire and a shielding layer which covers the power-up test signal wire, and further comprises a charge module and a discharge module. The power-up test signal wire is connected with the shielding layer through the charge module; the power-up test signal wire and the shielding layer are electrically connected with the discharge module and grounded through the discharge module. The electric signal detection system provided by the invention has the advantages that the parasitic capacitance is removedby charging the shielding layer through the charge module; after the test, the charge in the shielding layer is led out through the discharging module to prepare for the next test, therefore the power-up detection speed is improved.
Description
Technical field
The invention relates to a kind of electrical signal detection system, particularly a kind of electrical signal detection system that can power up fast.
Background technology
Demand to testing apparatus is very extensive in the world at present, and various testing apparatuss are handled the signal of screen layer can relate to this technology.
The high-speed electrical signals checkout equipment has higher requirement for the signal shielding layer, and good screen layer has greatly weakened the electromagnetic interference (EMI) of suffered other signals of outside of signal wire, and the electromagnetic signal emission of also having lowered circuit own is unlikely to influence other circuit.The screen layer traditional treatment method is appropriate ground connection.But for high speed test equipment, the use of a large amount of screen layers makes distributed capacitance bigger, make like this test signal to power up the time longer, otherwise signal can not be stablized foundation.
Be the structural representation of a kind of high-speed electrical signals detection system in the prior art shown in the accompanying drawing 1, comprise adding electric test signal line 11 and screen layer 12, wherein add the electric test signal line and be external to testing source (not shown), and screen layer 12 ground connection.Obviously, under the situation that adds a high speed test signal, add meeting generation one tangible stray capacitance C between electric test signal line 11 and the screen layer 12, this electric capacity can make the time lengthening that powers up that adds electric test signal line 11.
The shortcoming of prior art is, for high speed test equipment, and the existence of the stray capacitance test speed that slowed down.
Summary of the invention
Technical matters to be solved by this invention is, a kind of electrical signal detection system is provided, and can reduce the stray capacitance between the signal wire and screen layer under the high speed test condition, thereby improve testing efficiency.
In order to address the above problem, the invention provides a kind of electrical signal detection system, comprise adding the electric test signal line and being wrapped in and add the outer screen layer of electric test signal line, further comprise a charging module and a discharge module, the described electric test signal line that adds is connected to screen layer by charging module, add the equal electricity of electric test signal line and screen layer and be connected to discharge module, and by discharge module ground connection.
As optional technical scheme, described charging module comprises an amplifying circuit, and the input end of described amplifying circuit is connected to by one first switch electricity and adds the electric test signal line, and output terminal electricity is connected to screen layer.
As optional technical scheme, described amplifying circuit comprises the multi-stage operational amplifier that series connection arranges.
As optional technical scheme, described discharge module comprises a second switch, one first resistance, one second resistance and a ground-electrode, add the electric test signal line and be connected to ground-electrode and then ground connection by described second switch and the first resistance electricity, screen layer is connected to ground-electrode and then ground connection by the second resistance electricity.
The invention has the advantages that, by charging module is set screen layer is charged to eliminate stray capacitance, and after test finishes, by discharge module the electric charge in the screen layer is derived, ready for test next time, power up detection speed thereby improved.
Description of drawings
It is the structural representation of a kind of electrical signal detection system in the prior art shown in the accompanying drawing 1.
Accompanying drawing 2 is structural representations of the described high-speed electrical signals detection system of the specific embodiment of the invention.
Embodiment
Next introduce the embodiment of a kind of electrical signal detection of the present invention system by reference to the accompanying drawings in detail.
Accompanying drawing 2 is structural representations of the described high-speed electrical signals detection system of the specific embodiment of the invention, comprise and add electric test signal line 11 and screen layer 12, wherein add the electric test signal line and be external to and power up testing source (not shown), also comprise a charging module 21 and a discharge module 23.The described electric test signal line 11 that adds is connected to screen layer 12 by charging module 21, adds electric test signal line 11 and screen layer 12 equal electricity are connected to discharge module 23, and by discharge module 23 ground connection.
When adding electric test signal line 11 and add electrical testing, discharge module 23 ends and charging module 21 work, the electric signal that adds on the electric test signal line 11 acts on screen layer 12 by charging module 21, make screen layer 12 and add electric test signal line 11 equipotentials, avoided parasitic capacitance effect, the signal that adds on the electric test signal line 11 can be stablized rapidly, has improved to power up test speed.
When powering up end of test (EOT), discharge module 23 work and charging module 21 by, the electric charge in the screen layer 12 is discharged rapidly, for test is next time prepared.
Continue with reference to the accompanying drawings 2, in this embodiment, described charging module 21 comprises the amplifying circuit of being made up of first operational amplifier 211 of series connection setting and second operational amplifier 212, the input end of described amplifying circuit is connected to by one first switch, 213 electricity and adds electric test signal line 11, and output terminal electricity is connected to screen layer 12.Amplifying circuit can improve the voltage that is applied on the screen layer 12, improves charge efficiency, so be preferred version.During first switch, 213 closures, charging module 21 is in running order; When first switch 213 disconnected, charging module 21 was in cut-off state.First switch 213 adopts speed-sensitive switch, can further improve the work efficiency of system.In other embodiment, the amplifying circuit that also can adopt other similar structures such as transistor amplifier circuit to replace polystage amplifier to constitute.
Continue with reference to the accompanying drawings 2, in this embodiment, described discharge module 23 comprises a second switch 233, one first resistance 231, one second resistance 232 and a ground-electrode 234, add electric test signal line 11 and be connected to ground-electrode 234 and then ground connection by described second switch 233 and second resistance, 232 electricity, screen layer 12 is connected to ground-electrode and then ground connection by first resistance, 231 electricity.First resistance 231 and second resistance 232 mainly play a protective role when discharge.When second switch 233 closures, discharge module 21 is in running order, adds electric test signal line 11 and the conducting of ground-electrode electricity; When second switch 233 disconnected, discharge module 23 was in cut-off state, added electric test signal line 11 and ground-electrode mutually insulated.Second switch 233 adopts speed-sensitive switch, can further improve the work efficiency of system.In other embodiment, also can further adopt on-off element such as transistor to replace second switch 233 to realize switching functions, and adopt element such as inductance to replace resistance to realize defencive function and be reduced in low frequency or high frequency under ghost effect.
In sum; though the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention; the persond having ordinary knowledge in the technical field of the present invention; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking the claim person of defining that claims apply for.
Claims (2)
1. electrical signal detection system, comprise adding the electric test signal line and being wrapped in and add the outer screen layer of electric test signal line, it is characterized in that, further comprise a charging module and a discharge module, the described electric test signal line that adds is connected to screen layer by charging module, add the equal electricity of electric test signal line and screen layer and be connected to discharge module, and by discharge module ground connection; Described charging module comprises an amplifying circuit, and the input end of described amplifying circuit is connected to by one first switch electricity and adds the electric test signal line, and output terminal electricity is connected to screen layer, and wherein first switch is speed-sensitive switch; Described discharge module comprises a second switch, one first resistance, one second resistance and a ground-electrode, add the electric test signal line and be connected to ground-electrode and then ground connection by described second switch and the first resistance electricity, screen layer is connected to ground-electrode and then ground connection by the second resistance electricity, and wherein second switch is speed-sensitive switch.
2. electrical signal detection according to claim 1 system is characterized in that, described amplifying circuit comprises the multi-stage operational amplifier that series connection arranges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110186262 CN102353857B (en) | 2011-07-05 | 2011-07-05 | Electric signal detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110186262 CN102353857B (en) | 2011-07-05 | 2011-07-05 | Electric signal detection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102353857A CN102353857A (en) | 2012-02-15 |
| CN102353857B true CN102353857B (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110186262 Active CN102353857B (en) | 2011-07-05 | 2011-07-05 | Electric signal detection system |
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| CN (1) | CN102353857B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112394226A (en) * | 2019-08-16 | 2021-02-23 | Oppo广东移动通信有限公司 | Signal detection circuit and electronic device |
| CN113904390A (en) * | 2020-06-20 | 2022-01-07 | 岳秀兰 | Shielding body power generation system consisting of coil, control circuit, capacitor and battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2480819Y (en) * | 2001-06-20 | 2002-03-06 | 威海北洋电气集团股份有限公司仪器分公司 | Point poistion capacitance type material instrument with auliliary electrode |
| CN101285852A (en) * | 2008-05-26 | 2008-10-15 | 中国航天科技集团公司第五研究院第五一四研究所 | Alternating current voltage electric current converter and device and method for testing alternating-current small ammeter |
| CN201845056U (en) * | 2010-07-21 | 2011-05-25 | 江苏泰达机电设备有限责任公司 | Electrical signal detector |
| CN202126469U (en) * | 2011-07-05 | 2012-01-25 | 苏州索拉科技有限公司 | Electric signal detection system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1587226B1 (en) * | 2003-12-05 | 2007-10-24 | Nippon Telegraph and Telephone Corporation | Reactance adjustment device, transceiver and transmission device using the same, signal processing circuit suitable for them, reactance adjustment method, transmission method, and reception method |
| NL2001057C2 (en) * | 2007-12-05 | 2009-06-08 | Fluid Well Instr B V | Measuring device and method for locally measuring at least one electrical property of the contents of the container. |
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2011
- 2011-07-05 CN CN 201110186262 patent/CN102353857B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2480819Y (en) * | 2001-06-20 | 2002-03-06 | 威海北洋电气集团股份有限公司仪器分公司 | Point poistion capacitance type material instrument with auliliary electrode |
| CN101285852A (en) * | 2008-05-26 | 2008-10-15 | 中国航天科技集团公司第五研究院第五一四研究所 | Alternating current voltage electric current converter and device and method for testing alternating-current small ammeter |
| CN201845056U (en) * | 2010-07-21 | 2011-05-25 | 江苏泰达机电设备有限责任公司 | Electrical signal detector |
| CN202126469U (en) * | 2011-07-05 | 2012-01-25 | 苏州索拉科技有限公司 | Electric signal detection system |
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| CN102353857A (en) | 2012-02-15 |
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