Low Current True Swap Gate
Original Publication Date: 1981-Feb-01
Included in the Prior Art Database: 2005-Feb-10
A low current true swap gate design is shown in the drawing. Bubbles approaching Y-Bar 1 due to a clockwise rotating in-plane drive field are switched to I-Bar 2 by a current in conductor 8 applied over a phase region of 85 to 175 degrees. From I-Bar 2 the bubble then propagates to merge element 3 and to Z-Bar 4. Bubbles propagating around the minor loop to corner element 5 are transferred out to I-Bar 6 by a current applied to conductor 8 over a phase region of 265 to 355 degrees. The bubble then propagates to Y-Bar 7 into the exact position vacated by the bubble that was transferred in during the same field cycle. Likewise, the bubble transferred in exactly replaces the one transferred out of the minor loop, producing a true swap switching action when both current pulses are applied.