Browse Prior Art Database

Matrix Addition

IP.com Disclosure Number: IPCOM000098403D
Original Publication Date: 1960-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Foglia, HR: AUTHOR

Abstract

Serial matrix adders of the magnetic core type employ a feedback arrangement in which one input, during a given cycle of addition, is altered if the previous cycle of addition included a carry. This type operation may be eliminated by applying the adder output in binary form to a combination register and binary counter as shown. The register and counter include triggers TR and TC which are connected to the outputs of the matrix adder.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Matrix Addition

Serial matrix adders of the magnetic core type employ a feedback arrangement in which one input, during a given cycle of addition, is altered if the previous cycle of addition included a carry. This type operation may be eliminated by applying the adder output in binary form to a combination register and binary counter as shown. The register and counter include triggers TR and TC which are connected to the outputs of the matrix adder.

Assuming the highest number capable of being generated by the matrix adder to be a given quantity, say 126, which in binary is 0111111, then the highest order binary number is 64. The binary digits 011111 are registered in triggers TR having inputs I2, I4, I8, I16 and I32 while the highest order number is registered in the trigger TC having input I64.

All triggers except that having input I64 are reset for entry into the adder for the next cycle of addition. If, in the next cycle of addition, the I64 input line is again activated, that trigger is reset to set a higher order trigger which registers the numerical value of I28. Thus, the carries are counted until the addition is complete at which time both the register and carry counter are read out simultaneously to provide the complete sum.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]