Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1997-02-24
1998-11-03
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
348326, 348806, H01J 2958
Patent
active
058314008
ABSTRACT:
A delay-compensating dynamic focus amplifier includes a delay compensation circuit including two one-shot multivibrators for receiving a horizontal flyback signal and generating a sawtooth wave to compensate for a delay by adjusting a duty cycle, a focus waveform generator for receiving a delay-compensation output signal from the delay-compensation circuit and for generating a horizontal parabolic waveform, an amplifier for receiving the horizontal parabolic waveform from the focus waveform generator and for amplifying it depending on a regulated gain so as to provide a predetermined output current, and a controller for providing a control signal to the delay-compensation circuit and the waveform generator.
REFERENCES:
patent: 4683405 (1987-07-01), Truskalo et al.
Blum Theodore M.
Bushnell Esq. Robert E.
Samsung Electronics Co,. Ltd.
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