Memory organization wherein only new data bits which are different from the old are recorded

• US 3,311,893 A
• Filed: 08/29/1963
• Issued: 03/28/1967
• Est. Priority Date: 08/29/1963
• Status: Expired due to Term

• Current Assignee: William F. Landell
• Original Assignee: William F. Landell
• Inventors: Landell, William F.
• Application Number:
  US04/305,461
• Time in Patent Office: 1,307 Days
• US Class Current: 711/155
• CPC Class Codes: G06F 7/02 Comparing digital values G06F7/06, G06F7/22, G06F7/38 take precedence
• CPC Class Codes: H03K 17/84 the devices being thin-film devices

Claims

1. A MEMORY ORGANIZATION COMPRISING:

(A) A PLATED MAGNETIZABLE WIRE HAVING A MAGNETIC COATING, SAID COATING HAVING THE PROPERTY OF UNIAXIAL ANISOTROPY;

(B) A CONDUCTIVE STRAP POSITIONED SUBSTANTIALLY ORTHOGONAL TO SAID WIRE, THE INTERSECTION OF SAID WIRE AND SAID STRAP COMPRISING A MEMORY BIT POSITION;

(C) MEANS TO ENERGIZE SAID CONDUCTIVE STRAP DURING A MEMORY READ-OUT OR RECORD CYCLE;

(D) MEANS FOR PROVIDING CURRENT IN A FIRST, OR IN THE ALTERNATIVE, IN A SECOND DIRECTION TO SAID WIRE DURING A RECORD CYCLE COINCIDENTALLY WITH THE ENERGIZING OF SAID STRAP;

(E) MEANS TO SENSE PREVIOUSLY RECORDED BINARY INFORMATION AT SAID BIT POSITION WHEN SAID STRAP IS ENERGIZED FOR A READ CYCLE;

(F) MEANS TO PROVIDE NEW BINARY INFORMATION FOR RECORDING AT SAID BIT POSITION;

(G) MEANS FOR MAKING A COMPARISON BETWEEN SAID NEW BINARY INFORMATION TO BE RECORDED AND SAID PREVIOUSLY RECORDED BINARY INFORMATION WHICH HAS BEEN SENSED;

(H) SAID COMPARISON MEANS APPLYING A FIRST SIGNAL TO BLOCK SAID MEANS FOR PROVIDING CURRENT IN A FIRST, OR IN THE ALTERNATIVE, IN A SECOND DIRECTION WHEN SAID BINARY INFORMATION AND SAID PREVIOUSLY RECORDED BINARY INFORMATION ARE THE SAME;

(I) SAID COMPARISON MEANS APPLYING A SECOND SIGNAL TO SAID MEANS FOR PROVIDING CURRENT IN A FIRST, OR IN THE ALTERNATIVE, IN A SECOND DIRECTION WHEN SAID NEW BINARY INFORMATION AND SAID PREVIOUSLY RECORDED BINARY INFORMATION ARE DIFFERENT.