CN102721914A - Measuring device for voltage current characteristics of diode - Google Patents
Measuring device for voltage current characteristics of diode Download PDFInfo
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- CN102721914A CN102721914A CN 201210213571 CN201210213571A CN102721914A CN 102721914 A CN102721914 A CN 102721914A CN 201210213571 CN201210213571 CN 201210213571 CN 201210213571 A CN201210213571 A CN 201210213571A CN 102721914 A CN102721914 A CN 102721914A
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Abstract
The invention discloses a measuring device for voltage current characteristics of a diode. The measuring device comprises a power source, a single-pole single-throw switch, a slide-wire rheostat, a voltmeter, a single-pole double-throw switch, the diode, an ampere meter and a variable resistor. A positive pole of the power source is connected with a fixed contact of the single-pole single-throw switch, a movable contact of the single-pole single-throw switch is connected with one end of the slide-wire rheostat, and the other end of the slide-wire rheostat is connected with a negative pole of the power source; a sliding head of the slide-wire rheostat is connected with a fixed contact of the single-pole double-throw switch; a positive end of the diode is connected with a first movable contact of the single-pole double-throw switch, and a negative end of the diode is connected with the negative pole of the power source; a positive end of the ampere meter is connected with a second movable contact of the single-pole double-throw switch, a negative end of the ampere meter is connected with one end of the variable resistor, and the other end of the variable resistor is connected with the negative pole of the power source; and a positive end of the voltmeter is connected with the fixed contact of the single-pole double-thrown switch, and a negative end of the voltmeter is connected with the negative pole of the power source. The measuring device is simple in structure, practical and convenient, and is beneficial to accurately measure the voltage current characteristics of the diode.
Description
Technical field
The present invention relates to a kind of electric resistance measuring apparatus, be specially a kind of volt-ampere of characteristic diode measurement mechanism.
Background technology
At present, often utilize reometer and voltage table in the laboratory, through external ammeter or in connect the volt-ampere characteristic of method measuring diode.But owing to receive the influence of ammeter resistance, measurement result is not accurate enough.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, provide measurement result a kind of comparatively accurately volt-ampere of characteristic diode measurement mechanism.
To achieve these goals, the present invention takes following technical scheme:
A kind of volt-ampere of characteristic diode measurement mechanism; Comprise power supply, single-pole single-throw switch (SPST), rheochord, voltage table, single-pole double-throw switch (SPDT), diode, reometer and variable resistor; The positive pole of said power supply connects the fixed contact of said single-pole single-throw switch (SPST); The moving contact of said single-pole single-throw switch (SPST) connects an end of said rheochord, the negative pole of the said power supply of another termination of said rheochord; The slide head of said rheochord links to each other with the fixed contact of said single-pole double-throw switch (SPDT) electricity; The anode of said diode links to each other with first moving contact electricity of said single-pole double-throw switch (SPDT), and the negative terminal of said diode links to each other with the negative electricity of said power supply; The anode of said reometer links to each other with second moving contact electricity of said single-pole double-throw switch (SPDT), and the negative terminal of said reometer links to each other with a said variable-resistance end, the negative pole of the said power supply of said variable-resistance another termination; The fixed contact of the said single-pole double-throw switch (SPDT) of positive termination of said voltage table, the negative terminal of said voltage table connects the negative pole of said power supply.
Measuring process and principle are following: the first step: closed said single-pole single-throw switch (SPST); Said single-pole double-throw switch (SPDT) beaten to first moving contact make said diode place in circuit; Regulate the slide head of said rheochord, make the reading of said voltage table reach measured voltage values.Second step: said single-pole double-throw switch (SPDT) is beaten to second moving contact, regulated said variable-resistance resistance, make the reading of said voltage table identical with the reading of the first step.Flow through the electric current that flows through diode in said variable-resistance electric current and the first step this moment and equate that this current value can directly read from said reometer, the error that has caused owing to the access reometer when having avoided the measuring diode branch current.Write down the reading of said voltage table this moment, reometer.Repeat the measurement in above-mentioned two steps, measure one group of voltage, current value, make the VA characteristic curve of said diode with graphing method.
The present invention has overcome the deficiency of conventional diode voltammetric characteristic measuring owing to adopt above-mentioned design, and it is simple in structure, and is practical and convenient, helps the accurate measurement of volt-ampere of characteristic diode.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further.
Fig. 1 is circuit theory diagrams of the present invention.
Among the figure: 1. power supply, 2. single-pole single-throw switch (SPST), 3. rheochord, 4. voltage table, 5. single-pole double-throw switch (SPDT), 6. diode, 7. reometer, 8. variable resistor.
Embodiment
As shown in Figure 1; The present invention includes power supply 1, single-pole single-throw switch (SPST) 2, rheochord 3, voltage table 4, single-pole double-throw switch (SPDT) 5, diode 6, reometer 7 and variable resistor 8; The fixed contact of the anodal order monopole single throw switch 2 of power supply 1 among the figure; The moving contact of single-pole single-throw switch (SPST) 2 connects an end of rheochord 3, the negative pole of another termination power 1 of rheochord 3; The slide head P of rheochord 3 links to each other with the fixed contact of single-pole double-throw switch (SPDT) 5 electricity; The anode of diode 6 links to each other with the first moving contact a electricity of single-pole double-throw switch (SPDT) 5, and the negative terminal of diode 6 links to each other with the negative electricity of power supply 1; The anode of reometer 7 links to each other with the second moving contact b electricity of single-pole double-throw switch (SPDT) 5, and the negative terminal of reometer 7 links to each other with an end of variable resistor 8, the negative pole of another termination power 1 of variable resistor 8; The fixed contact of the anode order double-pole double throw switch 5 of voltage table 4, the negative terminal of voltage table 4 connects the negative pole of power supply 1.
Measuring process is following: the first step: closed single-pole single-throw switch (SPST) 2,5 dozens of single-pole double-throw switch (SPDT)s are made diode 6 places in circuit to the first moving contact a, and regulate the slide head P of rheochord 3, make the reading of voltage table 4 reach measured voltage values.Second step: 5 dozens of single-pole double-throw switch (SPDT)s to the second moving contact b, are regulated the resistance of variable resistor 8, make the reading of voltage table 4 identical with the reading of the first step.Write down the voltage table 4 and reading of reometer 7 this moment.Repeat the measurement in above-mentioned two steps, measure one group of voltage, current value, make the VA characteristic curve of diode 6 with graphing method.
Claims (1)
1. volt-ampere of characteristic diode measurement mechanism; It is characterized in that: comprise power supply, single-pole single-throw switch (SPST), rheochord, voltage table, single-pole double-throw switch (SPDT), diode, reometer and variable resistor; The positive pole of said power supply connects the fixed contact of said single-pole single-throw switch (SPST); The moving contact of said single-pole single-throw switch (SPST) connects an end of said rheochord, the negative pole of the said power supply of another termination of said rheochord; The slide head of said rheochord links to each other with the fixed contact of said single-pole double-throw switch (SPDT) electricity; The anode of said diode links to each other with first moving contact electricity of said single-pole double-throw switch (SPDT), and the negative terminal of said diode links to each other with the negative electricity of said power supply; The anode of said reometer links to each other with second moving contact electricity of said single-pole double-throw switch (SPDT), and the negative terminal of said reometer links to each other with a said variable-resistance end, the negative pole of the said power supply of said variable-resistance another termination; The fixed contact of the said single-pole double-throw switch (SPDT) of positive termination of said voltage table, the negative terminal of said voltage table connects the negative pole of said power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210213571 CN102721914A (en) | 2012-06-26 | 2012-06-26 | Measuring device for voltage current characteristics of diode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210213571 CN102721914A (en) | 2012-06-26 | 2012-06-26 | Measuring device for voltage current characteristics of diode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102721914A true CN102721914A (en) | 2012-10-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210213571 Pending CN102721914A (en) | 2012-06-26 | 2012-06-26 | Measuring device for voltage current characteristics of diode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102721914A (en) |
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2012
- 2012-06-26 CN CN 201210213571 patent/CN102721914A/en active Pending
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121010 |