Abstract: A deflection circuit for providing magnetic deflection of a cathode ray tube including resonant retrace, including circuitry to minimize the variations in intensity of the image at the beginning of the deflection period after the end of the retrace period, which variation may be caused by parasitic resonances excited by slow turn on of the flyback deflection clamping diode. The circuit enables the flyback clamping diode to begin conduction prior to the end of the retrace period so that the deflection clamping diode is substantially fully conducting and the voltage across the magnetic deflection coil is substantially constant at the end of the retrace period. Thus, a uniform transition is made from retrace to linear deflection and screen intensity variations are avoided.

Abstract: A high-speed graphics memory providing line mode and area mode data transfer at high speeds comprises a frame buffer structure, with unique address alignment and corresponding data manipulation to provide line mode and area mode pixel data transfer of comparable time intervals. The frame buffer comprises independently addressable 16 byte-wide video memories. The 16 memories provide a 128-bit contiguous horizontal pixel sequence in the line mode, and provide a two-dimensionally contiguous array of pixels comprising 8 bits by 2 bytes when in the area mode, from which an 8.times.8 bit area is selected at any address location in the entire image bit map. The pixels included in a particular line mode or area mode data transfer are directly addressable by external equipment, such as graphics processors, to provide a high-speed graphic display system.

Abstract: A high-performance deflection yoke providing deflection of an electron beam in a CRT at high rates at high deflection angles. The high-performance deflection yoke includes a heat sink contacting the deflection yoke coils to remove the heat produced in the deflection yoke due to core losses and heat produced in the deflection coils due to resistive losses. The heat sink minimizes induced eddy currents and comprises fine wire elements, interwoven and/or in juxtaposition with the deflection coils, wherein the heat created within and picked up by the deflection coils is transferred to the heat sink for dissipation. By minimizing power lost in the heat sink due to inductive heating of the metallic components thereof, the heat sink according to the present invention provides a high-performance deflection yoke having low inductance, high power performance not heretofore practically realizable.