Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1977-06-27
1979-02-27
Hubler, Malcolm F.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315367, 315388, H01J 2970
Patent
active
041421345
ABSTRACT:
A high speed driver circuit for the magnetic deflection yoke of an orthogonal channel displaying high speed alphanumeric characters, or the like, includes a first input receiving a stored signal proportional to the derivative of the vector slope component and a second input receiving a positive feedback from the yoke sense resistor. At high frequencies the yoke current is primarily inductive so that the voltage across the yoke is proportional to the rate of change of current through the yoke, hence, this voltage, when properly connected by positive feedback, is also proportional to the derivative of the voltage across the magnetic deflection yoke. By combining this voltage waveform directly within the vector slope signal, the need for an active integrator in the closed loop driving the magnetic deflection yoke is eliminated.
REFERENCES:
patent: 3515933 (1970-06-01), Myers
patent: 3757155 (1973-09-01), Waehner
patent: 3859557 (1975-01-01), Grant et al.
patent: 3935529 (1976-01-01), Kalmanash et al.
patent: 3965390 (1976-06-01), Spencer, Jr.
patent: 3983452 (1976-09-01), Bazin
patent: 4001806 (1977-01-01), Sweeting
Hubler Malcolm F.
Lange Richard P.
United Technologies Corporation
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