CN203276994U - Multi-range electronic resistor - Google Patents
Multi-range electronic resistor Download PDFInfo
- Publication number
- CN203276994U CN203276994U CN 201320264341 CN201320264341U CN203276994U CN 203276994 U CN203276994 U CN 203276994U CN 201320264341 CN201320264341 CN 201320264341 CN 201320264341 U CN201320264341 U CN 201320264341U CN 203276994 U CN203276994 U CN 203276994U
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- circuit
- multrirange
- man
- resistance device
- gain control
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Abstract
The utility model relates to a multi-range electronic resistor. A public variable resistor comprises a resistance box, a mechanical potentiometer and a digital potentiometer, the traditional resistance box is large in volume, and the resistance value of the resistance box is required to be programmably changed by utilizing plenty of relays, therefore, the volume of the resistance box is further increased, the power consumption is substantially increased, and the resistance box is unsuitable to be applied to actual circuit systems. The multi-range electronic resistor disclosed by the utility model comprises a shell (1), wherein an LCD (Liquid Crystal Display) screen is arranged on the shell and is connected with a man-machine interaction circuit (4), the man-machine interaction circuit (4) is connected with a singlechip circuit (3), the singlechip circuit (3) is connected with an LCD (Liquid Crystal Display) circuit (2), a range switching circuit (5) and a gain control circuit (6), respectively, and the range switching circuit is connected with the gain control circuit. The multi-range electronic resistor can be used as a variable resistor.
Description
Technical field:
The utility model relates to the resistor that a kind of resistance can be regulated continuously, particularly a kind of multrirange electronic resistance device.
Background technology:
The resistance box accuracy is high, circuit parameter that be widely used in related experiment is regulated, volume is large, cost is high, resolving power is low, do not possess continuous adjustability but exist, can not carry out the shortcomings such as intelligent automatic adjusting, make it lose competitiveness in the electron trade that circuit level, debugging automation etc. has higher requirements.The shortcomings such as use digital regulation resistance relatively widely, its volume is small and exquisite, it is integrated to be convenient to, but its resistance value can not change after determining thereupon, exists resolving power low, and range is single can not satisfy the demand of present stage electron trade fully.Existing industry is badly in need of that a kind of can to satisfy resistance value adjustable continuously, can guarantee again the small size of resistance accuracy, the resistor of low-power consumption.
Summary of the invention:
The purpose of this utility model is to provide a kind of multrirange electronic resistance device, and the machinery-free contact can realize that the program control of resistance presets and regulate continuously, and the conversion range is many, and output area is wide, and resolving power is high, and accuracy is good, compact conformation, and power consumption is lower.Can substitute variable resistance regulating circuit parameter in electronic circuit.
Above-mentioned purpose realizes by following technical scheme:
A kind of multrirange electronic resistance device, its composition comprises: housing, has LCD display on described housing, described LCD display is connected with the man-machine interaction circuit, described man-machine interaction circuit is connected with single chip circuit, described single chip circuit is connected with LCD display circuit, range switch circuit, gain control circuit respectively, and described range switch circuit is connected with described gain control circuit.
Described multrirange electronic resistance device is equipped with power circuit, input terminal, lead-out terminal in described housing.
Described multrirange electronic resistance device, described range switch circuit comprises that two 4 are selected 1 analog switch and dual operational amplifier.
Described multrirange electronic resistance device, described gain control circuit adopt two parallel multiplication type D-A converters to be connected with operational amplifier.
Described multrirange electronic resistance device, described single chip circuit adopts the 89C52 chip, and described 89C52 chip is connected with described man-machine interaction circuit.
Beneficial effect:
﹠lt, b TranNum="100" ﹠gt, the chip selection two-way 4 of range change-over circuit of the present utility model selects 1 analog multichannel switch, gather the data of key-press input and carry out the conversion of range by the range switching signal of processing rear transmission by control circuit, owing to can produce certain conducting resistance after electronic switch closes, can partly introduce certain error to low resistance like this, so the utility model selects two 4 to select 1 analog multichannel switch, four data inputs of two two-way variable connectors are carried out parallel connection, one tunnel output and amplifier form current circuit, one tunnel output is as Voltage-output, solved like this problem of conducting resistance.</b>
Gain control circuit of the present utility model is selected two four-quadrant multiplication type DAC, adopt the mode of weighted array to connect two DAC, a slice as output data a high position, a slice as output data low level, thereby make integrated circuit have higher resolving power.
Description of drawings:
Accompanying drawing 1 is structural representation of the present utility model.
Accompanying drawing 2 is system block diagrams of the present utility model.
Accompanying drawing 4 is gain control circuit schematic diagrams of the present utility model.
Accompanying drawing 5 is single-chip microcomputer of the present utility model and LCD circuit theory diagrams.
Embodiment:
Embodiment 1:
A kind of multrirange electronic resistance device, its composition comprises: housing 1, has LCD display on described housing, described LCD display is connected with man-machine interaction circuit 4, described man-machine interaction circuit is connected with single chip circuit 3, described single chip circuit is connected with LCD display circuit 2, range switch circuit 5, gain control circuit 6 respectively, and described range switch circuit is connected with described gain control circuit.
Embodiment 2:
Multrirange electronic resistance device described according to embodiment 1 is equipped with power circuit 8, input terminal 9, lead-out terminal 7 in described housing.
Embodiment 3:
Multrirange electronic resistance device described according to embodiment 1, described range switch circuit adopt and select 1 analog switch and dual operational amplifier for two 4, switch different feedback resistances, realize the multrirange conversion of wide region.
Embodiment 4:
Multrirange electronic resistance device described according to embodiment 1, weighting is connected two parallel multiplication type D-A converters of described gain control circuit employing with operational amplifier, by the total line traffic control of single-chip microcomputer P0, realizes that resistance is high-resolution adjustable continuously.
Embodiment 5:
Multrirange electronic resistance device described according to embodiment 1, described single chip circuit adopt the 89C52 chip to be connected with the man-machine interaction circuit, drive the 1602LCD display screen, realize man-machine information interaction.
Claims (5)
1. multrirange electronic resistance device, its composition comprises: housing, it is characterized in that: have LCD display on described housing, described LCD display is connected with the man-machine interaction circuit, described man-machine interaction circuit is connected with single chip circuit, described single chip circuit is connected with LCD display circuit, range switch circuit, gain control circuit respectively, and described range switch circuit is connected with described gain control circuit.
2. multrirange electronic resistance device described according to embodiment 1, is characterized in that: power circuit, input terminal, lead-out terminal are installed in described housing.
3. multrirange electronic resistance device described according to embodiment 1 or 2, it is characterized in that: described range switch circuit comprises that two 4 are selected 1 analog switch and dual operational amplifier.
4. multrirange electronic resistance device described according to embodiment 1 or 2 is characterized in that: described gain control circuit adopts two parallel multiplication type D-A converters to be connected with operational amplifier.
5. multrirange electronic resistance device described according to embodiment 1 or 2 is characterized in that: described single chip circuit adopts the 89C52 chip, and described 89C52 chip is connected with described man-machine interaction circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320264341 CN203276994U (en) | 2013-05-16 | 2013-05-16 | Multi-range electronic resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320264341 CN203276994U (en) | 2013-05-16 | 2013-05-16 | Multi-range electronic resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203276994U true CN203276994U (en) | 2013-11-06 |
Family
ID=49507354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320264341 Expired - Fee Related CN203276994U (en) | 2013-05-16 | 2013-05-16 | Multi-range electronic resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203276994U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488728A (en) * | 2019-10-03 | 2019-11-22 | 青岛大学 | Low resistance variable resistance based on analog circuit |
| CN114859129A (en) * | 2022-07-07 | 2022-08-05 | 武汉地震工程研究院有限公司 | Wireless multi-channel micro impedance measuring method and device |
-
2013
- 2013-05-16 CN CN 201320264341 patent/CN203276994U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488728A (en) * | 2019-10-03 | 2019-11-22 | 青岛大学 | Low resistance variable resistance based on analog circuit |
| CN114859129A (en) * | 2022-07-07 | 2022-08-05 | 武汉地震工程研究院有限公司 | Wireless multi-channel micro impedance measuring method and device |
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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: 20131106 Termination date: 20160516 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |