Layout for single level block access chip

A single level magnetic bubble chip comprising:

• a plurality of similar cells;
• at least first and second conductors each having a straight-line configuration across said chip crossing all of said cells;
• an input propagation path meandering across said chip crossing all of said cells, including two crossings of said first conductor on each cell;
• each cell having a closed loop propagation path for storing recirculating magnetic bubble domains therein, said closed loop propagation path meandering on its cell, including twice crossing said second conductor;
• an output propagation path meandering across said chip crossing all of said cells, including two crossings of said second conductor on each cell;
• each cell having a first active component associated with said first signal conductor at said two crossings of said first conductor to control bubble domain propagation through said first propagation path, said first active component comprising first switch means for transferring magnetic bubble domains from said input path to said closed loop path in response to a signal on said first signal conductor;
• and
• each cell further having a second active component associated with said second signal conductor at said two crossings of said second conductor to control bubble domain propagation through said closed loop path, said second active component comprising second switch means for transferring magnetic bubble domains from said closed loop path to said output propagation path in response to a signal on said second signal conductor.