Browse Prior Art Database

Read Only Memory

IP.com Disclosure Number: IPCOM000096160D
Original Publication Date: 1963-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Stapper, CH: AUTHOR

Abstract

This read-only memory facilitates the storage of fixed information. Secured to one side of printed circuit board 10 are a plurality of conductive strips 11. Secured to the other side of board 10 are a plurality of conductive strips 12. Strips 12 are perpendicularly disposed and above strips 11 and each includes a plurality of coupling loops 13. These act as short-circuited transformers, so that electromagnetic energy appearing in strips 11 is isolated from strips 12.

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Read Only Memory

This read-only memory facilitates the storage of fixed information. Secured to one side of printed circuit board 10 are a plurality of conductive strips 11. Secured to the other side of board 10 are a plurality of conductive strips 12. Strips 12 are perpendicularly disposed and above strips 11 and each includes a plurality of coupling loops 13. These act as short-circuited transformers, so that electromagnetic energy appearing in strips 11 is isolated from strips 12.

A punched hole 14 placed in the side of the loop which is included in strips 12 interrupts the short-circuit path without disturbing a complete circuit for the passage of current along strips 12. With a punched hole, energy applied to strips 11 is inductively linked to strips 12 through coupling loops 13 to establish a current flow on strips 12.

The absence of a punched hole produces no output signal which corresponds to a 0. The presence of a punched hole produces an output signal which corresponds to a 1.

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