Title: Constant velocity vector generator

Abstract: A Constant Velocity Vector Generator is disclosed for connecting X, Y coordinate points of a rectangular coordinate display system. Simultaneous .DELTA.X and .DELTA.Y step voltages are converted to ramp voltage pairs which are applied to appropriate X and Y deflection circuits of a graphic display device to produce straight-line traces whose velocities are constant for all vectors regardless of magnitude (line length) or direction (angle). Each vector may be drawn to any length or direction, immediately after which new data may be applied to the vector generator to initiate a new vector whose origin is the end point of the preceding vector. Such a system is particularly applicable to computer-drawn displays. The vector generating circuits are suitable for realization in a monolithic integrated circuit.

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Other info:

Inventors: Rieger, Michael Lawrence (Beaverton, OR, US)

Application Number: 625609
Filing Date: 1975-10-24
Publication_date: 1977-06-28
Assignee: Tektronix, Inc. (Beaverton, OR)
Primary Class(es): 708/845 345/16, 708/811, 708/849
Other Classes:
US Patent Ref:

3482086	Dec, 1969	Caswell	340/324.
3688028	Aug, 1972	Altemus	340/324.
3725897	Apr, 1973	Bleiweiss	328/185.
3772563	Nov, 1973	Hasenbalg	235/198.
3809868	May, 1974	Villalobos et al.	340/324.

Other Refs:
Primary Examiner: Ruggiero, Joseph F.
Assistant Examiner:
Attorney: Noe; George T.