JPS55142255A - Measuring method of forward voltage drop in thyristor diode - Google Patents
Measuring method of forward voltage drop in thyristor diodeInfo
- Publication number
- JPS55142255A JPS55142255A JP5031779A JP5031779A JPS55142255A JP S55142255 A JPS55142255 A JP S55142255A JP 5031779 A JP5031779 A JP 5031779A JP 5031779 A JP5031779 A JP 5031779A JP S55142255 A JPS55142255 A JP S55142255A
- Authority
- JP
- Japan
- Prior art keywords
- forward voltage
- measuring
- electric current
- voltage drop
- fvd
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Testing Of Individual Semiconductor Devices (AREA)
Abstract
PURPOSE: To improve the accuracy of measuring forward voltage drop in a thyristor diode and to obtain excellent reproduciblity, by measuring forward voltage therein by a method which causes no increase in the temperature of a junction portion thereof.
CONSTITUTION: In order to measure forward voltage drop FVD, an electric current of a sine half-wave is applied from an electric current source 13 to a sample 1, and a peak of the electric current is detected by a peak detecting circuit 11, FVD being measured by a FVD measuring circuit 12. In this measuring method, an increase in a conjunction portion of the sample 1 can be miminized so that a measuring accuracy is improved to a great extent. When a capacitor 18 has been charged to a predetermined current level after a switch 15 had been closed, the switch 15 is opened by a comparator circuit 24 to turn off the electric current source used for measurement. a thyristor 21 is then turned on to rsonate at an arbitrary resonance frequency a resonance circuit having a reactor 20 and the capacitor 18, and the first one cycle is applied to the sample 1.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5031779A JPS55142255A (en) | 1979-04-25 | 1979-04-25 | Measuring method of forward voltage drop in thyristor diode |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5031779A JPS55142255A (en) | 1979-04-25 | 1979-04-25 | Measuring method of forward voltage drop in thyristor diode |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55142255A true JPS55142255A (en) | 1980-11-06 |
Family
ID=12855517
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5031779A Pending JPS55142255A (en) | 1979-04-25 | 1979-04-25 | Measuring method of forward voltage drop in thyristor diode |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55142255A (en) |
-
1979
- 1979-04-25 JP JP5031779A patent/JPS55142255A/en active Pending
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