JPS5616831A - Burnout circuit of four-wire measured resistor - Google Patents
Burnout circuit of four-wire measured resistorInfo
- Publication number
- JPS5616831A JPS5616831A JP9152779A JP9152779A JPS5616831A JP S5616831 A JPS5616831 A JP S5616831A JP 9152779 A JP9152779 A JP 9152779A JP 9152779 A JP9152779 A JP 9152779A JP S5616831 A JPS5616831 A JP S5616831A
- Authority
- JP
- Japan
- Prior art keywords
- phase input
- voltage
- differential amplifier
- input terminal
- reverse phase
- 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.)
- Granted
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
PURPOSE: To operate the control system to the safety side, by constituting the circuit so that the output may be always set to burnout and down-scale when various abnormal states dependent upon disconnection of a measured resistor are generated.
CONSTITUTION: When the first current supplying lead wire A1 of thermometric resistor 1 is disconnected, constant current (i) from constant current source 2 is flowed to diode D1 and the base and the emitter of transistor Q1 and is circulated through bias resistance Rb. Therefore, voltage e1 at the positive phase input terminal of differential amplifier 3 becomes e1=Rb.i. Meanwhile, voltage Rb.i at both ends of bias resistance Rb is applied to the reverse phase input terminal of differential amplifier 3 also. Here, since reverse phase input impedance Z5 is very large in comparison with the value of the parallel synthesized resistance, voltage e2 applied to the reverse phase input terminal becomes e2=Rb.i also. Consequently, the output of differential amplifier 3 becomes burnout and up-scale instantaneously, so that the control system can be operated to the safety side.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9152779A JPS5616831A (en) | 1979-07-20 | 1979-07-20 | Burnout circuit of four-wire measured resistor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9152779A JPS5616831A (en) | 1979-07-20 | 1979-07-20 | Burnout circuit of four-wire measured resistor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5616831A true JPS5616831A (en) | 1981-02-18 |
JPS6367668B2 JPS6367668B2 (en) | 1988-12-27 |
Family
ID=14028895
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9152779A Granted JPS5616831A (en) | 1979-07-20 | 1979-07-20 | Burnout circuit of four-wire measured resistor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5616831A (en) |
-
1979
- 1979-07-20 JP JP9152779A patent/JPS5616831A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6367668B2 (en) | 1988-12-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5672350A (en) | Variable current source | |
JPS57206113A (en) | Amplifier for limiter | |
US4081696A (en) | Current squaring circuit | |
US4352057A (en) | Constant current source | |
JPS5652420A (en) | Constant-current circuit | |
JPS5616831A (en) | Burnout circuit of four-wire measured resistor | |
US4691262A (en) | Circuit for protecting a power transistor against a short-circuited load | |
JPS5533221A (en) | Current output circuit | |
JPS5518155A (en) | Power amplifier | |
JPS54161381A (en) | Temperature detector | |
JPS5547414A (en) | Linearizer | |
JPS5445770A (en) | Stabilized power supply | |
JPS5616830A (en) | Burnout circuit of four-wire measured resistor | |
SU881714A1 (en) | Stabilized dc voltage source | |
JPS5651609A (en) | Input circuit | |
SU1046746A2 (en) | Dc voltage stabilizer | |
SU1146646A1 (en) | Low-voltage reference element | |
RU2078373C1 (en) | Comparison circuit | |
SU873229A2 (en) | Electric power supply source with central tap | |
JPS5490549A (en) | Dc stabilized power source device | |
JPS52116054A (en) | Amplifier circuit | |
JPS55149854A (en) | Current detecting circuit for parallel-operated transistor circuit | |
JPS5567660A (en) | Power maker circuit | |
JPS55146062A (en) | Automatic tester | |
JPS56132006A (en) | Differential amplifier |