Patent ID: 8699888
Filing Date: 2014-04-15
Classification: G06E,G11C

Abstract:
1. An optical linear feedback circuit having: an optical loop delay path for recirculating a sequence of optical signals, one or more output paths coupled to the optical loop delay path, for outputting delayed optical signals of the sequence after circulating one or more times around the optical loop delay path, a selector for selecting one or more of the delayed optical signals from the sequence, an optical logic circuit coupled to the one or more output paths for carrying out a logical operation on the selected delayed optical signals, a feedback path for feeding an optical feedback signal output by the optical logic circuit to the optical loop delay path, and an optical coupler to couple the feedback path to the optical loop delay path, so that in operation the optical feedback signal can be added to the sequence of optical signals already circulating, wherein the optical loop delay path and the feedback path are separate and different paths.