JPS555554A - Demagnetizing circuit - Google Patents
Demagnetizing circuitInfo
- Publication number
- JPS555554A JPS555554A JP7885378A JP7885378A JPS555554A JP S555554 A JPS555554 A JP S555554A JP 7885378 A JP7885378 A JP 7885378A JP 7885378 A JP7885378 A JP 7885378A JP S555554 A JPS555554 A JP S555554A
- Authority
- JP
- Japan
- Prior art keywords
- thyristor
- synchronizing signal
- vertical synchronizing
- capacitor
- transistor
- 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
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
PURPOSE: To obtain color picture without color unevenness, even at the location subject to magnetic change, by demagnetizing the color Braun tube in synchronizing with the vertical synchronizing signal.
CONSTITUTION: When the vertical synchronizing signal is inputted to the transistor 3, the emitter of the transistor 5 is made negative, the thyristor 6 is cut off, the emitter voltage of the transistor 3 is increased to conduct the thyristor 7. When no vertical synchronizing signal is present, the thyristor 6 is conductive and the capacitor 11 is charged up. But since the thyristor 7 is conducted, the charge is discharged through the demagnetizing coil. In this case, since the capacitor 13 is charged and the thyristor 8 is conducted through the resistor 14, the thyristors 7 and 8 are made conductive in opposite polarity and osillation current repeating charging and discharging between the capacitor 11 and the demagnetizing circuit 10 flows. When the vertical synchronizing signal is absent, the thyristors 7 and 8 are again cut off.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7885378A JPS555554A (en) | 1978-06-28 | 1978-06-28 | Demagnetizing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7885378A JPS555554A (en) | 1978-06-28 | 1978-06-28 | Demagnetizing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS555554A true JPS555554A (en) | 1980-01-16 |
Family
ID=13673376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7885378A Pending JPS555554A (en) | 1978-06-28 | 1978-06-28 | Demagnetizing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS555554A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5873295A (en) * | 1981-10-27 | 1983-05-02 | Matsushita Electric Ind Co Ltd | Automatic demagnetizing device |
DE3418076A1 (en) * | 1984-05-16 | 1985-11-21 | Loewe Opta Gmbh, 8640 Kronach | Circuit arrangement for the automatic demagnetisation of the tube in a colour-television receiver |
JPH0375625U (en) * | 1989-11-22 | 1991-07-30 |
-
1978
- 1978-06-28 JP JP7885378A patent/JPS555554A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5873295A (en) * | 1981-10-27 | 1983-05-02 | Matsushita Electric Ind Co Ltd | Automatic demagnetizing device |
DE3418076A1 (en) * | 1984-05-16 | 1985-11-21 | Loewe Opta Gmbh, 8640 Kronach | Circuit arrangement for the automatic demagnetisation of the tube in a colour-television receiver |
DE3418076C2 (en) * | 1984-05-16 | 1986-06-26 | Loewe Opta Gmbh, 8640 Kronach | Circuit arrangement for the automatic demagnetization of the picture tube in a color television receiver |
JPH0375625U (en) * | 1989-11-22 | 1991-07-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5536800A (en) | Resistance neutralization system for electrochemical device | |
GB1357409A (en) | Battery charging circuit | |
JPS555554A (en) | Demagnetizing circuit | |
JPS524735A (en) | Electric charge transfer type image pick-up equipment | |
JPS54100248A (en) | Timer circuit | |
JPS5689174A (en) | Solid image pickup device | |
JPS5693188A (en) | Transfer pulse control system of charge transfer element | |
JPS5210514A (en) | Transformation device | |
JPS52421A (en) | Recording substrate | |
JPS51123160A (en) | Electronic photograph device | |
JPS51118322A (en) | Color tv set | |
JPS5481023A (en) | High voltage generation circuit | |
JPS547228A (en) | Pedestal clamp circuit | |
JPS5519781A (en) | X ray photographying timer | |
JPS5597727A (en) | Oscillation circuit | |
JPS5268422A (en) | Two-color electrostatic recording apparatus | |
JPS5380641A (en) | Current feed type timer of heater for defroster | |
JPS5275224A (en) | Index color receiving tube | |
JPS5516563A (en) | Stabilizer circuit for video output voltage | |
JPS5555675A (en) | Pick up unit | |
JPS52147440A (en) | Electrostatic recording material | |
JPS54120516A (en) | Transmission system for alternating current signal | |
Vasil'ev et al. | Stabilization of yield and density of neutron flux in electrostatic accelerators | |
JPS5239157A (en) | Constant voltage circuit | |
JPS57123551A (en) | Setting circuit for applied voltage |