Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1995-07-28
1997-01-21
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315408, H01Q 322, H01Q 324, H01Q 326
Patent
active
055962491
ABSTRACT:
A horizontal output circuit having a east and west pincushion distortion correcting function modulating the amplitude of a horizontal deflecting current to be parabolic in a vertical period by using a pulse width variable pulse signal. A voltage produced in a capacitor C1 provided between a series circuit of a horizontal deflecting coil Dy and S correcting capacitor Cs connected in parallel to a horizontal output transistor Q3 and a reference potential point GND is modulated by using a pulse signal from a pulse width modulating IC 10. The modulated voltage is fed to a smooth circuit including a coil L2 and capacitor C2 provided in parallel with the capacitor C1. A negative power source is obtained by this smooth circuit from which power is fed to a power source terminal 13 of the pulse width modulating IC 10. That is to say, a negative voltage -Vlave produced in the capacitor C2 is integrated, the voltage is stored in said capacitor C2 and the average voltage -Vlave is fed as a negative power source to the power source terminal 13 of the pulse modulating IC 10. The power source has little power loss and can be formed of a small number of component parts.
REFERENCES:
patent: 3906305 (1975-09-01), Nillesen
patent: 4677350 (1987-06-01), Wharton et al.
patent: 4906903 (1990-03-01), Ochiai
patent: 4935675 (1990-06-01), Ochiai
patent: 5043637 (1991-08-01), Gries et al.
patent: 5059874 (1991-10-01), Oliver
IBM Technical Disclosure Bulletin, "Low Dissipation E-W Raster Correction", vol. 33, No. 1A, Jun. 1990, pp. 73-74.
Blum Theodore M.
Kabushiki Kaisha Toshiba
LandOfFree
Horizontal output circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Horizontal output circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Horizontal output circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2326412