JPS5714756A - Holding current selector circuit - Google Patents
Holding current selector circuitInfo
- Publication number
- JPS5714756A JPS5714756A JP8914580A JP8914580A JPS5714756A JP S5714756 A JPS5714756 A JP S5714756A JP 8914580 A JP8914580 A JP 8914580A JP 8914580 A JP8914580 A JP 8914580A JP S5714756 A JPS5714756 A JP S5714756A
- Authority
- JP
- Japan
- Prior art keywords
- thyristor
- current
- holding current
- gate terminal
- constant
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/263—Circuits therefor for testing thyristors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
Abstract
PURPOSE:To measure and select the holding current of a thyristor in a short time, by causing a constant current of the rated value to flow into the thyristor beforehand, applying on/off signals from a gate terminal, and detecting the conductive or nonconductive state at that time. CONSTITUTION:When constant current Is is applied from a constant-current generator circuit 10 to a thyristor 1 to be measured, anode potential VAK reaches the saturated voltage of the constant-current generator circuit 10. Here, an on signal VG is applied to the gate terminal 4 of the thyristor 1 to once make the thyristor 1 conductive. When the on signal VG is removed from the gate terminal 4, the thyristor 1 returns to the nonconductive state, if the holding current IH of the thyristor 1 is larger than the reference current Is. Whereas, if the holding current IH is smaller than the reference current IS, the thyristor retains the conductive state. Namely, the holding current is selected by detecting the conduction state of the thyristor 1 with the use of a comparator 11, when the on signal VG is removed from the gate terminal 4 of the thyristor 1. Through said constitution, the holding current is measured and selected in a short time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8914580A JPS5714756A (en) | 1980-07-02 | 1980-07-02 | Holding current selector circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8914580A JPS5714756A (en) | 1980-07-02 | 1980-07-02 | Holding current selector circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5714756A true JPS5714756A (en) | 1982-01-26 |
Family
ID=13962693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8914580A Pending JPS5714756A (en) | 1980-07-02 | 1980-07-02 | Holding current selector circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5714756A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6087425A (en) * | 1994-02-18 | 2000-07-11 | Rohm And Haas Company | Laminating adhesive composition |
| US6120638A (en) * | 1996-01-25 | 2000-09-19 | Rohm And Haas Company | Dispersible, high speed book casing-in vinyl ester/(meth)acrylate adhesive |
-
1980
- 1980-07-02 JP JP8914580A patent/JPS5714756A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6087425A (en) * | 1994-02-18 | 2000-07-11 | Rohm And Haas Company | Laminating adhesive composition |
| US6120638A (en) * | 1996-01-25 | 2000-09-19 | Rohm And Haas Company | Dispersible, high speed book casing-in vinyl ester/(meth)acrylate adhesive |
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