CN203658894U - Two-way relay type digital potentiometer - Google Patents
Two-way relay type digital potentiometer Download PDFInfo
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- CN203658894U CN203658894U CN201420022968.XU CN201420022968U CN203658894U CN 203658894 U CN203658894 U CN 203658894U CN 201420022968 U CN201420022968 U CN 201420022968U CN 203658894 U CN203658894 U CN 203658894U
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Abstract
The utility model discloses a two-way relay type digital potentiometer which comprises a relay driving unit, a two-way two-pole relay group, a power supply management unit, a first resistor branch circuit and a second resistor branch circuit. The two-way two-pole relay group is connected with the first resistor branch circuit and the second resistor branch circuit. The two-way two-pole relay group is connected with the relay driving unit and controlled by the relay driving unit. The power supply management unit provides power for the two-way two-pole relay group. The two-way relay type digital potentiometer is long in service life, program-controllable, large in permitted current and voltage and capable of reasonably changing resistance values of two resistor branch circuits, enabling a resistance value output by the middle output end of the potentiometer to be changed with size of digital signals input into the two-way two-pole relay group, ensuring total resistance at two ends of each resistor branch circuit to be constant and achieving potentiometer functions.
Description
Technical field
The utility model relates to a kind of potentiometer, relates in particular to a kind of two-way relay system digital regulation resistance.
Background technology
At present, mainly be divided into mechanical potentiometer and ordinary numbers potentiometer at existing potentiometer, wherein mechanical potentiometer is to be wrapped on insulant and to be formed by thin resistance wire, because resistance wire is generally thinner, when brush slides, resistance wire easily disconnects, and causes its machinery short serviceable life, exist sliding noise, can not be digital program controlled etc. shortcoming.Ordinary numbers potentiometer is the potentiometer that adopts integrated circuit technique to be made into, adopt the series connection of metal-oxide-semiconductor controlling resistance, the device being changed by Digital Signals resistance, there is the advantage of long service life, vibration resistance, but be limited to manufacturing process, its specified resistance error is large, temperature coefficient is large, passband allows electric current little compared with narrow, sliding end, allows the shortcomings such as the voltage of work is lower.
Utility model content
The purpose of this utility model is: in order to address the above problem, provide a kind of have long service life, program-controlled, allow by the two-way relay system potentiometer of the advantages such as current/voltage is larger.
To achieve these goals, the technical solution of the utility model is:
A kind of two-way relay system digital regulation resistance, comprises relay drive unit, two-way two keys relay group, Power Management Unit, the first resistance branch and the second resistance branch; Described two-way two keys relay group is connected with the second resistance branch with described the first resistance branch; Described two-way two keys relay group is connected with described relay drive unit, by described relay drive unit control; Described Power Management Unit provides power supply for described two-way two keys relay group.
Further, described the first resistance branch and the second resistance branch include eight resistance of series connection successively; Described two-way two keys relay group comprises eight groups of two keys relay; Described eight groups of two keys relay are connected on eight resistance of described the first resistance branch and the second resistance branch.
Further, described two resistance branch connect with the form of series connection; The port extending from the tie point of described two resistance branch is middle output terminal.
Further, the resistance value of described two resistance branch is fixed.
Further, two of described two keys relay groups of contacts are connected to the two ends of resistance.
Further, the resistance size of described eight resistance increases progressively.
The utility model is owing to having adopted above-mentioned technology, and the good effect that makes it compared with prior art to have is:
The utility model two-way relay system digital regulation resistance, by two-way two keys relay switch, rationally change the resistance size in two resistance branch, in the middle of can making potentiometer, output terminal output resistance changes with the digital signal size of input two-way two keys relay, and can ensure that two resistance branch two ends all-in resistances remain unchanged, and can realize potentiometer function; The utility model two-way relay system digital regulation resistance overcomes mechanical potentiometer can not digital programming Control shortcoming, and the output resistance of two-way relay system digital regulation resistance is conventional, electric-resistance, and resistance output quantity and Digital Signals are isolation mutually; The utility model two-way relay system digital regulation resistance allows larger by electric current, allows that the voltage of work is higher, temperature coefficient is lower; Two-way relay system digital regulation resistance of the present utility model is easy to operate fast, is easy to use.
Brief description of the drawings
Fig. 1 is the resistance branch resistance distribution diagram of the utility model two-way relay system digital regulation resistance.
Fig. 2 is the relay circuit figure of the utility model two-way relay system digital regulation resistance.
Embodiment
Further illustrate embodiment of the present utility model below in conjunction with accompanying drawing.
Refer to shown in Fig. 1 and Fig. 2, a kind of two-way relay system digital regulation resistance, comprises relay drive unit, two-way two keys relay group, Power Management Unit, the first resistance branch AW and the second resistance branch BW; Described two-way two keys relay group is connected with the second resistance branch BW with described the first resistance branch AW; Described two-way two keys relay group is connected with described relay drive unit, by described relay drive unit control; Described Power Management Unit provides power supply for described two-way two keys relay group.
Preferably, described the first resistance branch AW and the second resistance branch BW include successively eight resistance of series connection, they respectively: R3, R8, R14, R17, R21, R25, R29, R33 and R4, R9, R13, R18, R22, R26, R30, R34; Described two-way two keys relay group comprises eight groups of two keys relay; Described eight groups of two keys relay are connected on eight resistance of described the first resistance branch and the second resistance branch.
Preferably, described two resistance branch connect with the form of series connection; The port W extending from the tie point of described two resistance branch is middle output terminal.
Preferably, the resistance value of described two resistance branch is fixed.
Preferably, two of described two keys relay groups of contacts are connected to the two ends of resistance.
Preferably, the resistance size of described eight resistance increases progressively.
Preferably, the composition of the first resistance branch AW:
Capacitor C 1 and resistance R 1 are connected, more in parallel with resistance R 3
Capacitor C 3 and resistance R 7 are connected, more in parallel with resistance R 8
Capacitor C 5 and resistance R 12 are connected, more in parallel with resistance R 14
Capacitor C 9 and resistance R 20 are connected, more in parallel with resistance R 21
Capacitor C 11 and resistance R 24 are connected, more in parallel with resistance R 25
Capacitor C 13 and resistance R 28 are connected, more in parallel with resistance R 29
Capacitor C 15 and resistance R 32 are connected, more in parallel with resistance R 33
Then these unit in parallel are in series successively with R2, R10 again
The composition of the second resistance branch BW:
Capacitor C 2 and resistance R 5 are connected, more in parallel with resistance R 4
Capacitor C 4 and resistance R 11 are connected, more in parallel with resistance R 9
Capacitor C 6 and resistance R 15 are connected, more in parallel with resistance R 13
Capacitor C 8 and resistance R 19 are connected, more in parallel with resistance R 18
Capacitor C 10 and resistance R 23 are connected, more in parallel with resistance R 22
Capacitor C 12 and resistance R 27 are connected, more in parallel with resistance R 26
Capacitor C 14 and resistance R 31 are connected, more in parallel with resistance R 34
Then connect successively with R6, R10 in these unit in parallel again
Finally first these two branch roads of resistance branch AW the second resistance branch BW are together in series again, and middle output terminal is W.
As an example of a pair of resistance on two-way branch road and two keys relay example, the utility model is elaborated below, two keys relay comprises two groups of electric shock RWA1-RWA2 and the RWB1-RWB2 of K switch 1, RWA1-RWA2 is connected to the two ends of the first resistance R 3 of the first resistance branch, RWB1-RWB2 is connected to the two ends of the first resistance R 4 of the second resistance branch, be connected with RWB1-RWB2 or disconnect by controlling RWA1-RWA2, control AW, resistance value between BW, by that analogy, rationally change the resistance size in two resistance branch, in the middle of can making potentiometer, output terminal output resistance changes with the digital signal size of input two-way two keys relay, and can ensure that two resistance branch two ends all-in resistances remain unchanged, can realize potentiometer function.
In sum, the utility model long service life, program-controlled, allow larger by current/voltage, can rationally change two resistance sizes in resistance branch, in the middle of can making potentiometer, output terminal output resistance changes with the digital signal size of input two-way two keys relay, and can ensure that two resistance branch two ends all-in resistances remain unchanged, and can realize potentiometer function.
Claims (6)
1. a two-way relay system digital regulation resistance, is characterized in that: comprise relay drive unit, two-way two keys relay group, Power Management Unit, the first resistance branch and the second resistance branch; Described two-way two keys relay group is connected with the second resistance branch with described the first resistance branch; Described two-way two keys relay group is connected with described relay drive unit, by described relay drive unit control; Described Power Management Unit provides power supply for described two-way two keys relay group.
2. two-way relay system digital regulation resistance according to claim 1, is characterized in that: described the first resistance branch and the second resistance branch include eight resistance of series connection successively; Described two-way two keys relay group comprises eight groups of two keys relay; Described eight groups of two keys relay are connected on eight resistance of described the first resistance branch and the second resistance branch.
3. two-way relay system digital regulation resistance according to claim 1, is characterized in that: described two resistance branch connect with the form of series connection; The port extending from the tie point of described two resistance branch is middle output terminal.
4. two-way relay system digital regulation resistance according to claim 1, is characterized in that: the resistance value of described two resistance branch is fixed.
5. two-way relay system digital regulation resistance according to claim 2, is characterized in that: two groups of contacts of described two keys relay are connected to the two ends of resistance.
6. two-way relay system digital regulation resistance according to claim 2, is characterized in that: the resistance size of described eight resistance increases progressively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420022968.XU CN203658894U (en) | 2014-01-14 | 2014-01-14 | Two-way relay type digital potentiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420022968.XU CN203658894U (en) | 2014-01-14 | 2014-01-14 | Two-way relay type digital potentiometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203658894U true CN203658894U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420022968.XU Expired - Fee Related CN203658894U (en) | 2014-01-14 | 2014-01-14 | Two-way relay type digital potentiometer |
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| Country | Link |
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| CN (1) | CN203658894U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109767887A (en) * | 2019-02-12 | 2019-05-17 | 成都凯天电子股份有限公司 | The series-parallel method for combining given output resistance |
| CN114974769A (en) * | 2022-05-18 | 2022-08-30 | 北京石油化工学院 | Definite value digital potentiometer |
-
2014
- 2014-01-14 CN CN201420022968.XU patent/CN203658894U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109767887A (en) * | 2019-02-12 | 2019-05-17 | 成都凯天电子股份有限公司 | The series-parallel method for combining given output resistance |
| CN109767887B (en) * | 2019-02-12 | 2023-10-24 | 成都凯天电子股份有限公司 | Method for combining given output resistance values in series-parallel connection |
| CN114974769A (en) * | 2022-05-18 | 2022-08-30 | 北京石油化工学院 | Definite value digital potentiometer |
| CN114974769B (en) * | 2022-05-18 | 2023-09-19 | 北京石油化工学院 | Fixed value digital potentiometer |
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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: 20140618 Termination date: 20150114 |
|
| EXPY | Termination of patent right or utility model |