Browse Prior Art Database

Universal Matrix Coder

IP.com Disclosure Number: IPCOM000078691D
Original Publication Date: 1973-Feb-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Dailey, JR: AUTHOR [+2]

Abstract

Metal Nitride Oxide Silicon (MNOS) technology is used to advantage in a changeable nonvolatile storage matrix.

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Universal Matrix Coder

Metal Nitride Oxide Silicon (MNOS) technology is used to advantage in a changeable nonvolatile storage matrix.

The drawing shows a matrix of MNOS array storage consisting of a 63-bit (9x7) word of storage per character and n words, one for each character in a character set for use in printing applications.

The MNOS technology permits changing of character sets by direct writing into the matrix, while retaining power-off storage capability.

The output of the matrix is loaded into a shift register 20 having outputs 1-9 to drive print hammer drivers in one application.

The code for a character to be printed addresses a particular word of the array, such as a-n in read mode. The word addressed is read out by nondestructive read into shift register 20, and synchronized with print hammer drivers in groups of 9 such as 1-9, 10-18 etc.

Shift register 20 is connected to end-around shift and is cleared when the character is printed.

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