"1 OF N" CODE ADDER Russian patent published in 1999 - IPC

FIELD: digital communications, automation and computer engineering, in particular, parallel detectors of channel digital signals, alarm equipment and devices which count number of ones in binary combination. SUBSTANCE: goal of invention is achieved by logical addition of partial sums which are result of bit-wise multiplication of input codes, and pair- wise logical multiplication of signals of bit-wise logical addition of input codes. Same bits are subjected to bit-wise operations. This entails that input codes do not enter into sum code. Number of partial sums and AND gates which implement them is decreased down to N(N+1)/2. EFFECT: elimination of superposition of input codes to output sum code, simplified design. 2 dwg