Multiple frequency horizontal scan compensation system

Details Multiple frequency horizontal scan compensation system Multiple frequency horizontal scan compensation system

1993-03-19

1994-06-28

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315370, H01J 2970, H01J 2976

Patent

active

053250257

ABSTRACT:
A multiple frequency horizontal scan system includes a scan frequency compensation system which detects horizontal scan frequency changes by frequency detecting the horizontal sync pulses. A frequency responsive switching system couples the appropriate reactive components to the horizontal defection yoke and horizontal output transformer in response to sync pulse frequency. The system further supplies alternative voltages for the scan system operating supply in response to horizontal sync pulse frequency. In addition, the system provides a convenient source of frequency dependent switching signal which may be utilized to operate additional auxiliary elements in response to changes of horizontal scan system frequency.

REFERENCES:
patent: 4536684 (1985-08-01), Babcock
patent: 4645989 (1987-02-01), Barnes
patent: 4761586 (1988-08-01), Wharton

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