CN202975312U - Metering-used four-terminal-pair high-frequency standard resistor - Google Patents
Metering-used four-terminal-pair high-frequency standard resistor Download PDFInfo
- Publication number
- CN202975312U CN202975312U CN 201220726838 CN201220726838U CN202975312U CN 202975312 U CN202975312 U CN 202975312U CN 201220726838 CN201220726838 CN 201220726838 CN 201220726838 U CN201220726838 U CN 201220726838U CN 202975312 U CN202975312 U CN 202975312U
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- bnc
- coaxial cable
- cable connector
- short
- high frequency
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Abstract
The utility model relates to a metering-used four-terminal-pair high-frequency standard resistor. The resistor comprises a voltage coaxial cable connector, a current coaxial cable connector, a high-frequency chip resistor, short circuit pieces and a shielding box, wherein the voltage coaxial cable connector and the current coaxial cable connector are respectively arranged on the shielding box; the bottom central ends of the voltage coaxial cable connector and the current coaxial cable connector are respectively connected with the short circuit pieces; and the bottom electrodes of the high-frequency chip resistor are respectively welded on the two short circuit pieces. The metering-used four-terminal-pair high-frequency standard resistor is simple in structure, easy in manufacturing technology, and low in cost.
Description
Technical field
The utility model relates to a kind of metering measuring resistance, particularly relate to a kind of metering with four ends to the high frequency measuring resistance.
Background technology
Existing metering is no more than 1MHz with the common applying frequency of measuring resistance, as common single measuring resistance and standard resistance box, normally calibrates under direct current, can use as resistance standard below the 1MHz frequency.At present, metering field can be used for 1MHz with the measuring resistance of upper frequency both at home and abroad, the 42030A that only has U.S. Agilent company to produce, and it designs by four terminal pair configuration, reduces or the stationary distribution parameter influence, makes standard have higher stability.
But this cover resistance need use special circuit coating process at value below 10 ohm, to reduce the series inductance impact.Its technique is comparatively complicated, uses filming previous metals, is unfavorable for applying.And its series inductance magnitude is 20 about nanohenrys when the 1MHz frequency, causes obtaining better frequency characteristic.
Summary of the invention
For improving above the deficiencies in the prior art, the utility model provide a kind of metering with four ends to the high frequency measuring resistance.Realize that to solve present similar standard technology difficulty is larger, the problem that cost is higher, and improve its frequency characteristic.
The purpose of this utility model is achieved through the following technical solutions:
A kind of metering with four ends to the high frequency measuring resistance, this resistance comprises voltage BNC, current coaxial cable connector, high frequency Chip-R, short-circuit piece and shielding box, described voltage BNC and current coaxial cable connector are separately positioned on shielding box, and the bottom centre of voltage BNC and current coaxial cable connector end is connected with respectively short-circuit piece, and two hearth electrodes of described high frequency Chip-R are welded on respectively on described two short-circuit pieces.
Further, also be provided with insulator between described two short-circuit pieces and voltage BNC and current coaxial cable connector.
Further, described short-circuit piece is the short-circuit piece of red copper material.
Further, described voltage BNC and current coaxial cable connector are fixed on shielding box by nut.
Further, described voltage BNC comprises hot end BNC and electronegative potential BNC.
Further, described current coaxial cable connector comprises high current terminal BNC and low current end BNC.
The utility model has the advantage of:
The utility model is simple in structure, and manufacture craft is easy, and cost is lower.
Use the short-circuit piece of red copper material and perfect shielding construction, greatly reduce the distribution parameter of alternating-current resistance standard, the series inductance of 10 ohm of alternating-current resistances of actual measurement is 12 nanohenrys when frequency 1MHz, and 1MHz is in the 10MHz frequency range, and the resistance magnitude variations is less than 1 * 10
-3
Description of drawings
Fig. 1: the utility model structure principle chart.
Embodiment
Be illustrated in figure 1 as the utility model structural representation, resistance comprises shielding box 1, high current coaxial cable connector 2, low current BNC 3, high voltage BNC 4, low-voltage BNC 5, high frequency Chip-R 6, short-circuit piece 7 and short-circuit piece 8 to the high frequency measuring resistance with four ends in a kind of metering.Described high current coaxial cable connector 2, low current BNC 3, high voltage BNC 4, low-voltage BNC 5 are separately positioned on shielding box 1, and the bottom centre of low current BNC 3 and low-voltage BNC 5 end is connected with short-circuit piece 7, and bottom centre's end of high current coaxial cable connector 2 and high voltage BNC 4 is connected with short-circuit piece 8.Two hearth electrodes of described high frequency Chip-R 6 are welded on respectively on described short-circuit piece 7 and short-circuit piece 8.
Described high current terminal, hot end, low current end, cold end BNC are fixed on the shielding box front panel by nut, guarantee connector housings and shielding box electric short circuit, guarantee shield effectiveness.Four ports form " four ends to " special purpose interface, can be connected with the impedance measurement instrument.
The size punching in accordance with regulations of described short-circuit piece, and be welded on high current terminal, hot end BNC center.Short-circuit piece plays the high electric current of short circuit and hot end, and the insulator in BNC guarantees heart yearn and the external shield insulation after short circuit.Low current end, cold end BNC are done same processing.
Two hearth electrodes of high frequency Chip-R are welded on respectively on two short-circuit pieces, guarantee that electrode welding point is minimum.
The utility model is connected with the digital impedance measuring instrument the BNC interface by front panel four ends, reads the first finger of digital impedance measuring instrument, as measured value.Inner in utility model, digital impedance measuring instrument current signal is back to impedometer through the high frequency Chip-R from the electric current low side from electric current is high-end, voltage signal on alternating-current resistance is from high low-voltage end feedback impedometer simultaneously, through the impedometer analytical calculation, obtain displayed value, thereby reach the purpose of metering impedometer.
The utility model can be used for the intelligent impedometer of metering four end docking ports at 1MHz in the 10MHz frequency range, this apparatus structure is simple, and cost of manufacture is lower.In addition, use the short-circuit piece of red copper material and perfect shielding construction, greatly reduce the distribution parameter of alternating-current resistance standard, the series inductance of 10 ohm of alternating-current resistances of actual measurement is 12 nanohenrys when frequency 1MHz, 1MHz is in the 10MHz frequency range, and the resistance magnitude variations is less than 1 * 10
-3
Should be appreciated that the above detailed description of technical scheme of the present invention being carried out by preferred embodiment is illustrative and not restrictive.Those of ordinary skill in the art is reading on the basis of instructions of the present invention and can modify to the technical scheme that each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
- A metering with four ends to the high frequency measuring resistance, it is characterized in that, this resistance comprises voltage BNC, current coaxial cable connector, high frequency Chip-R, short-circuit piece and shielding box, described voltage BNC and current coaxial cable connector are separately positioned on shielding box, and the bottom centre of voltage BNC and current coaxial cable connector end is connected with respectively short-circuit piece, and two hearth electrodes of described high frequency Chip-R are welded on respectively on described two short-circuit pieces.
- 2. a kind of metering according to claim 1, is characterized in that the high frequency measuring resistance with four ends, also is provided with insulator between described two short-circuit pieces and voltage BNC and current coaxial cable connector.
- 3. a kind of metering according to claim 1, is characterized in that the high frequency measuring resistance with four ends, and described short-circuit piece is the short-circuit piece of red copper material.
- 4. a kind of metering according to claim 1, is characterized in that the high frequency measuring resistance with four ends, and described voltage BNC and current coaxial cable connector are fixed on shielding box by nut.
- 5. a kind of metering according to claim 4, is characterized in that the high frequency measuring resistance with four ends, and described voltage BNC comprises hot end BNC and electronegative potential BNC.
- 6. a kind of metering according to claim 4, is characterized in that the high frequency measuring resistance with four ends, and described current coaxial cable connector comprises high current terminal BNC and low current end BNC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726838 CN202975312U (en) | 2012-12-25 | 2012-12-25 | Metering-used four-terminal-pair high-frequency standard resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726838 CN202975312U (en) | 2012-12-25 | 2012-12-25 | Metering-used four-terminal-pair high-frequency standard resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202975312U true CN202975312U (en) | 2013-06-05 |
Family
ID=48516370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220726838 Expired - Fee Related CN202975312U (en) | 2012-12-25 | 2012-12-25 | Metering-used four-terminal-pair high-frequency standard resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202975312U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344932A (en) * | 2013-07-09 | 2013-10-09 | 上海华力微电子有限公司 | Standard testing sample |
| CN104485187A (en) * | 2014-12-15 | 2015-04-01 | 安庆市计量测试所 | Series-connected medium-value standard resistor |
| CN105390220A (en) * | 2015-12-08 | 2016-03-09 | 杭州大华仪器制造有限公司 | Alternating-current resistor structure |
-
2012
- 2012-12-25 CN CN 201220726838 patent/CN202975312U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344932A (en) * | 2013-07-09 | 2013-10-09 | 上海华力微电子有限公司 | Standard testing sample |
| CN104485187A (en) * | 2014-12-15 | 2015-04-01 | 安庆市计量测试所 | Series-connected medium-value standard resistor |
| CN105390220A (en) * | 2015-12-08 | 2016-03-09 | 杭州大华仪器制造有限公司 | Alternating-current resistor structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20151225 |
|
| EXPY | Termination of patent right or utility model |