JPS5594165A - Transistor damage detetcor - Google Patents
Transistor damage detetcorInfo
- Publication number
- JPS5594165A JPS5594165A JP69679A JP69679A JPS5594165A JP S5594165 A JPS5594165 A JP S5594165A JP 69679 A JP69679 A JP 69679A JP 69679 A JP69679 A JP 69679A JP S5594165 A JPS5594165 A JP S5594165A
- Authority
- JP
- Japan
- Prior art keywords
- parallel
- transistor
- resistor
- transistors
- damage
- 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 Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
PURPOSE: To simplify the construction of a switching transistor damage detector by judging the damage of the switching transistors connected in parallel for balancing currents on the basis of induced voltage change generated at any emitter resistor of the switching transistors.
CONSTITUTION: A plurality of switching transistors 18,... are connected in parallel with a transistor switch 17 for balancing currents. The AC current amount to be supplied to a welder or the like is determined according to their selection. Any of LED 36W39 corresponding to the selected AC current amount irradiates a light by the induced voltage by the current flowing through the emitter resistor 19 of desired transistor 18 through a detecting circuit having arithmetic amplifiers 20W23 connected in parallel with the resistor 19. When the transistors 18 are damaged in this state, the increased induced voltage is detected via the resistor 19, and the LED 36W39 irradiate lights in response to the damaged transistors 18. Thus, the damage of the transistor can be detected with a simple construction that is connected not to the emitter resistors at every detecting circuit but in parallel to any emitter resistor.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP69679A JPS5594165A (en) | 1979-01-10 | 1979-01-10 | Transistor damage detetcor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP69679A JPS5594165A (en) | 1979-01-10 | 1979-01-10 | Transistor damage detetcor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5594165A true JPS5594165A (en) | 1980-07-17 |
Family
ID=11480919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP69679A Pending JPS5594165A (en) | 1979-01-10 | 1979-01-10 | Transistor damage detetcor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5594165A (en) |
-
1979
- 1979-01-10 JP JP69679A patent/JPS5594165A/en active Pending
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