Corpuscular beam control circuit arrangement

Claim 1

A digital circuit arrangement for control of a corpuscular beam in the course of producing structurized areas by use of corpuscular irradiation devices, particularly operating with linearly extended multi-deflection systems including a plurality of deflection electrodes for bright/dark modulation for processing of said geometrical areas in columns, comprising an x, y-raster, figure points defining said geometrical areas in said x,y-raster, said figure points being constituted of edge points and corner points, a generating means comprised of a plurality of electronic members, said electronic members being for producing columns, said columns containing said edge points, said plurality of electronic members corresponding in number to said number of deflection electrodes, said electronic members including a first, a second and a third trigger each, said first, second and third trigger storing edge control signals defining the direction of arrangement of said edge points in said x,y raster, said first trigger defining an angle of +45° between said direction and the x-direction of said x, y-raster, said second trigger defining an angle of 0° between said direction and said x-direction, said third trigger defining an angle of -45° between said direction and the (negative) x-direction, each of said electronic members further comprising a decoder, a first, a second, and a third gate, a first and a second antivalence circuit, said edge control signals and an y-coordinate address signal from said decoder and a write-in clockpulse from said decoder being simultaneously connected to the set and reset inputs of each of said triggers via a respective gate of said first, second and third gate in each of said electronic components, the clockpulse inputs of said first and said third trigger of each of said electronic members being connected via a clockpulse bus line to perform a raster-step in x-direction, the outputs of said first and second trigger being connected to the inputs of a first antivalence gate, the output of said first antivalence gate and the output of said third trigger being connected to the inputs of a second antivalence gate, the output of said second antivalence gate being the edge point signal output of each of said electronic components, said electronic members being further columnwise connected to form a first and a second shift register, said first shift register being constituted in that the outputs of each of said first triggers of said electronic members being connected to the data input of said first triggers in adjacent of said electronic members, said second shift register being constituted in that the data input of said third triggers in said electronic members being connected to the output of said third trigger in adjacent of said electronic members, the inputs of the respective first electronic members in the column of electronic members being on logic "zero", a logic circuit arrangement being connected to said generating means for producing of complete bit pattern columns out of the edge point signals from the columnwise arrangement of electronic members said logic circuit arrangement being for producing a bright/dark control signal for each raster pixel wherein first antivalence members being provided, one of said antivalence members being provided for a number 2 m (where m is a natural number) of raster pixels, the output of said antivalence members producing a bright/dark control signal, the first inputs of said antivalence members being connected to the respective outputs of an adjacent preceding antivalence member, thus forming sub-chains, the second inputs of said antivalence members being connected to the respective edge point signal outputs of said electronic members, said logic circuit arrangement including subcircuits constituted of one sub-chain each, the 2 m output signals of which being combined in antivalence to a a subcircuit output signal, the first input of the first antivalence gate in each sub-chain being a carry input, pairs of adjacent of said subcircuits being combined to form a higher order subcircuit by connecting in pairs subcircuit output signals to carry inputs of subsequent subcircuits, the carry inputs of each of said subcircuits being controlled by the antivalence combination of all edge point signals operative before said subcircuits.