JPS5663226A - 3-line resistance type burn-out circuit - Google Patents
3-line resistance type burn-out circuitInfo
- Publication number
- JPS5663226A JPS5663226A JP13931979A JP13931979A JPS5663226A JP S5663226 A JPS5663226 A JP S5663226A JP 13931979 A JP13931979 A JP 13931979A JP 13931979 A JP13931979 A JP 13931979A JP S5663226 A JPS5663226 A JP S5663226A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- lead wire
- voltage
- constant current
- output
- 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
Abstract
PURPOSE: To realize both the normal measurement and the burn-out at one time and thus simplify the circuit constitution, by flowing the constant current to the temperature measuring resistor through the lead wire and extracting the output by the plural operational amplifiers.
CONSTITUTION: The constant current is supplied to one end of the temperature measuring resistor RT from the constant current source I through the terminal A and the lead wire l1; and the other end of the resistor RT is earthed via the lead wire l2 and the terminal B and at the same time connected to the nonreverse input of the operational amplifier A1 via the lead wire l3 and the terminal B'. And the voltage of the terminal A is applied to the noninverse input of the operational amplifier A2, and the output of the amplifier A1 is supplied to the reverse input of the amplifier A1. When the line l1 is disconnected, the potentials of the terminals A and B' turns to +V and zero respectively. Thus, the outputs of A1 and A2 turn to zero and the +voltage each. And in case the lines l2 and l3 are disconnected, the output of A2 turns to the +voltage. As a result, both the normal measurement and the burn-out can be performed at one time.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13931979A JPS5663226A (en) | 1979-10-30 | 1979-10-30 | 3-line resistance type burn-out circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13931979A JPS5663226A (en) | 1979-10-30 | 1979-10-30 | 3-line resistance type burn-out circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5663226A true JPS5663226A (en) | 1981-05-29 |
Family
ID=15242534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13931979A Pending JPS5663226A (en) | 1979-10-30 | 1979-10-30 | 3-line resistance type burn-out circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5663226A (en) |
-
1979
- 1979-10-30 JP JP13931979A patent/JPS5663226A/en active Pending
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