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Balanced Capacitor Read Only Store

IP.com Disclosure Number: IPCOM000094729D
Original Publication Date: 1965-May-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Draper, SW: AUTHOR [+3]

Abstract

Drawing 1 shows schematically a portion of a balanced capacitor read-only store. Pairs of sense lines are arranged to cross drive lines, only one shown, to provide a matrix of storage locations at the crossover points. A binary 1 is represented by capacitive coupling from a drive line to one line of a sense line pair together with capacitive coupling from the other of the sense line pair to ground. A binary 0 is represented by reversing these connections.

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Balanced Capacitor Read Only Store

Drawing 1 shows schematically a portion of a balanced capacitor read-only store. Pairs of sense lines are arranged to cross drive lines, only one shown, to provide a matrix of storage locations at the crossover points. A binary 1 is represented by capacitive coupling from a drive line to one line of a sense line pair together with capacitive coupling from the other of the sense line pair to ground. A binary 0 is represented by reversing these connections.

Drawing 2 shows, in section, one construction of this store using printed circuits with pluggable units to provide coupling. The printed circuits consist of insulating layer 1 separated by conductive ground plane 3 from similar layer 2. Layer 1 carries drive lines 4, only one shown. Layer 2 carries sense line pairs 5a-5b and 6a-6b arranged orthogonal to lines 4. Holes are provided through the printed circuits at the crossover points of the drive and sense lines. These lines extend into the holes as shown.

Each coupling element consists of a long rod 8 and a short rod 9 connected by insulating strip 10. An element is plugged into the two holes provided at each pair of crossover points of a pair of sense lines with a drive line. Rod 8 provides capacitive coupling from drive to one line of a sense line pair, e.g., from drive line 4 to sense line 5a. Rod 9 provides coupling from the other sense line of the pair to ground, e.g., from sense line 5b to ground plane 3. Rod 8 is made th...