JPS5486284A - Measuring circuit for thermal resistance of darlington transistor - Google Patents
Measuring circuit for thermal resistance of darlington transistorInfo
- Publication number
- JPS5486284A JPS5486284A JP15299677A JP15299677A JPS5486284A JP S5486284 A JPS5486284 A JP S5486284A JP 15299677 A JP15299677 A JP 15299677A JP 15299677 A JP15299677 A JP 15299677A JP S5486284 A JPS5486284 A JP S5486284A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- power supply
- thermal resistance
- base
- transistors
- 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
- Measuring Temperature Or Quantity Of Heat (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
Abstract
PURPOSE:To make it possible to measure accurately thermal resistances of various transistors within the broad measurement temperature range by providing a constant-current supply supplying a fine current to the base of a Darlington transistor to be tested and collector power supply circuit which can be detached freely. CONSTITUTION:The Darlington transistor to be tested consists of prior-stage transistor 12 with parasitic resistance 16 between its base and emitter and output-stage transistor 14. For the purpose of measuring the thermal resistance of this transistor, constant-current supply 22 composed of power supply 18, thermal resistance 20 is provided between emitters of transistors 12 and 14, and base power supply 26 is connected in parallel to power supply 22 via the 1st auxiliary transistor 24. In addition, the emitter of transistor 24 is connected to that of the 2nd auxiliary transistor 28 and collector power supply 30 is provided between collectors of transistors 28 and 10. In this way, forward voltage drop DELTAVBE of transistor 10 and power consumption P are found, thereby preforming the calculation according to the equation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15299677A JPS5486284A (en) | 1977-12-21 | 1977-12-21 | Measuring circuit for thermal resistance of darlington transistor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15299677A JPS5486284A (en) | 1977-12-21 | 1977-12-21 | Measuring circuit for thermal resistance of darlington transistor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5486284A true JPS5486284A (en) | 1979-07-09 |
Family
ID=15552664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15299677A Pending JPS5486284A (en) | 1977-12-21 | 1977-12-21 | Measuring circuit for thermal resistance of darlington transistor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5486284A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015081786A (en) * | 2013-10-21 | 2015-04-27 | 本田技研工業株式会社 | Thermal resistance evaluation method of semiconductor element |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5420834A (en) * | 1977-07-15 | 1979-02-16 | Kubota Ltd | Reaper and harvester |
-
1977
- 1977-12-21 JP JP15299677A patent/JPS5486284A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5420834A (en) * | 1977-07-15 | 1979-02-16 | Kubota Ltd | Reaper and harvester |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015081786A (en) * | 2013-10-21 | 2015-04-27 | 本田技研工業株式会社 | Thermal resistance evaluation method of semiconductor element |
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Legal Events
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A01 | Written decision to grant a patent or to grant a registration (utility model) |
Effective date: 20040518 Free format text: JAPANESE INTERMEDIATE CODE: A01 |
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LAPS | Cancellation because of no payment of annual fees |