JPS5667770A - Glow current measurement for lighting tube - Google Patents
Glow current measurement for lighting tubeInfo
- Publication number
- JPS5667770A JPS5667770A JP14479979A JP14479979A JPS5667770A JP S5667770 A JPS5667770 A JP S5667770A JP 14479979 A JP14479979 A JP 14479979A JP 14479979 A JP14479979 A JP 14479979A JP S5667770 A JPS5667770 A JP S5667770A
- Authority
- JP
- Japan
- Prior art keywords
- output
- lighting tube
- abnormal discharge
- circuit
- peak value
- 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
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
PURPOSE: To measure without error by holding the peak value of glow current and at the same time, clearing the peak value held when an abnormal discharge occurrs in the lighting tube.
CONSTITUTION: The volume of a glow current flowing through a resistance 5 for a lighting tube becomes an output for a differential amplifier 13 and its peak value is held by a hold circuit 16. If the lighting tube makes an abnormal discharge in a glow discharge, the output level of the amplifier 13 shows an abnormal rise. Therefore, a comparator 23 for an abnormal discharge detecting circuit 22 detects said increase, emitting an abnormal discharge detecting output, which a memorizer 25 memorizes temporarily to output a memory signal. As a result, an analog switch circuit 14 opens a constant-closed type switch 14b, closing a constant-open type switch 14a. Concurrently, the circuit 16 opens an input part and stops the hold action of an output from the amplifier 13, resulting in a zero clearing. Consequently, it is possible to carry out sure measurement free from any error.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14479979A JPS5667770A (en) | 1979-11-08 | 1979-11-08 | Glow current measurement for lighting tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14479979A JPS5667770A (en) | 1979-11-08 | 1979-11-08 | Glow current measurement for lighting tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5667770A true JPS5667770A (en) | 1981-06-08 |
Family
ID=15370722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14479979A Pending JPS5667770A (en) | 1979-11-08 | 1979-11-08 | Glow current measurement for lighting tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5667770A (en) |
-
1979
- 1979-11-08 JP JP14479979A patent/JPS5667770A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR950030486A (en) | Power-on reset circuit | |
JPS57121703A (en) | Driving circuit of electromagnetic operating device | |
JPS57124946A (en) | Pulse detection circuit | |
JPS5276085A (en) | Clinical thermometer | |
KR920015137A (en) | Precision measurement method of low resistance value | |
JPS5667770A (en) | Glow current measurement for lighting tube | |
JPS5527922A (en) | Position detector | |
JPS57182153A (en) | Gas detector | |
BR9713002A (en) | Dosing oven. | |
JPS6440959A (en) | High-voltage discharging current supply system | |
JPS5444735A (en) | Leak detector with leak indicator | |
JPS5338944A (en) | Abnormality detector | |
JPS5441793A (en) | Leakage tester | |
JPS54125537A (en) | Lighting-fire detection device | |
JPS5752837A (en) | Vacuum degree measuring instrument | |
JPS55138665A (en) | Detecting system of operation fault of heating source | |
JPS5216297A (en) | Gas detecting element equipped with temperature correction elemet usin g "n" type metal oxide | |
JPS51138486A (en) | Temperature detecting circuit | |
JPS55162069A (en) | Fault detector for electric temperature detector | |
JPS57131069A (en) | Circuit for detecting voltage variation | |
JPS5457144A (en) | Overcurrent detector | |
JPS56130646A (en) | Alarm equipment for gas leakage | |
JPS53106596A (en) | Continuity testing system | |
JPS5679908A (en) | Analog indicator | |
JPS5786766A (en) | Level detecting device |