Circuit for determining point coordinates on circles - has clock pulse controlled coordinate store, inverters, divider and adder for display

摘要

The circuit for determining the coordinates of points on a circle is suitable for use with radar displays and data display units. If the centre of the circle is then taken as the origin of an x-y coordinate and one point on the circle is known, further points are determined from specific formulae. - The X and Y values of the known point are fed to inverters whose outputs are connected to registers whose standard and complement outputs pass to further inverters. The output of one inverter is stored in a register, the other being fed to a divider which has an additional input for the fixed divisor. The register and divider outputs pass to an adder. The output signals (Xn+1) (Yn+1) are fed back to the input inverters. The clock pulse control is provided from a central unit.