Digital vector generator which causes the electron beam to move in the largest possible increment by sensing if the line is divisible by 2{11 .

Claim 1

An electron beam speed control circuit for a cathode ray tube having a deflection system for moving the beam and wherein the smallest step the beam can be moved is a unit increment, said circuit comprising: a. first storage means for storing m bits representing present beam position, b. second storage means for storing m bits representing final beam position, c. a comparator coupled to said first and second storage means for comparing n of said m bits of said present beam position with n corresponding bits of said final beam position and producing an output signal when said bits compare, and d. control means coupled to said comparator and the deflection system for moving said beam in 2n 1 unit increments, said control means causing said beam to move in 2n unit increments when said output signal is produced by said comparing means.