Absolute difference generator for use in display systems

Details Absolute difference generator for use in display systems Absolute difference generator for use in display systems

G - Physics

06

F

354/204, 375/36

G06F 7/50 (2006.01) G05B 19/41 (2006.01) G09G 1/10 (2006.01) G09G 1/26 (2006.01)

Patent

CA 1137637

ABSOLUTE DIFFERENCE GENERATOR FOR USE IN DISPLAY SYSTEMS ABSTRACT OF THE DISCLOSURE An absolute difference generator comprises an adder, an Exclusive-OR, two inverters and a latch. One input number is inverted, then presented to one input of the adder while the other input num- ber is presented to the other input of the adder. The carry out line of the adder sets a latch, the out- put of which is fed back to the carry in line of the adder. The latch output is also combined with the adder output in an Exclusive-OR to control inversion of the adder output and produce the absolute difference between the input data. PO9-79-008

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