Abstract—This note describes a new analog-memory or variable- weight device that can be set to any of 100 stable states and switched between states in 100 ns or less. The device uses the coupling between a circularly polarized microwave signal (as generated by a helical structure) and a partially switched ferrite core.

The significance of the coding assignment in linear threshold networks used for pattern recognition has been discussed. A heuristic procedure for generating linearly separable codes for a sample set of patterns has been outlined. Experimental results showing the recognition performance of codes so chosen have been shown. The performance of these codes is comparable to the 1-out-of-n code commonly used, but more optimum codes may exist. More work on the coding assignment problem is in order and should allow more efficient linear threshold networks in the pattern recognition application.

``List structure'' arrangements of information are increasingly being used in digital data-processing applications. A ``push-down'' list is one manipulated in a last-in, first-out manner. The implementation of such a list structure is possible in a variety of ways. This paper describes one such method which uses a delay line as a storage device.