Circuit for a picture display device for converting an input d.c

Details Circuit for a picture display device for converting an input d.c Circuit for a picture display device for converting an input d.c

1981-10-26

1983-04-26

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2970, H01J 2976

Patent

active

043814778

ABSTRACT:
A circuit for a picture display device for converting an input d.c. voltage into a stabilized output d.c. voltage, comprising a transformer whose primary winding is part of a first resonant network and a switch switching at line frequency the conduction period of which depends on the output voltage. Through the primary winding there flows a first sawtooth current whose retrace period is determined by the elements of the first resonant network while the output voltage at the secondary side of the transformer is generated by means of a diode. A second resonant network is included between the diode and the switch and comprises an inductance, which can be a line deflection coil, through which a second sawtooth current flows. The retrace period thereof is determined by the elements of the second resonant network and both retrace periods are initiated at the same moment.

REFERENCES:
patent: 3950674 (1976-04-01), Joosten et al.

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