Abstract:
Ferroelectric crystals which are also ferroelastic, such as gadolinium molybdate, can support stable internal ferroelectric polarization domains. These domains are expanded and moved in the ferroelectric crystal by means of a sequence of voltages applied to electrodes on the surface of the crystal. Thereby, optically readable, shift register logic functions are achieved using (for readout) an incident optical beam with respect to which the ferroelectric domains are birefringent.
Abstract:
A low power magnetic bubble memory for use in, for example, telephone repertory dialer operation is achieved with existing bubble functional elements. An electrical conductor pattern is adapted to input, simultaneously, bubble patterns representative of decimal digit information as well as the control information for properly queuing and storing that information. An adaptation of the familiar major-minor bubble organization is employed. The dialer is designed to operate on sufficiently low power to be powered entirely from a telephone central office.
Abstract:
The field access mode of operating a single-wall domain mass memory is adapted for the reordering of stored information depending on the recency of use of the information. The memory is organized in the familiar major-minor loop arrangement where information is transferred from minor loops to the major loop for write and read operations. Reordering is permitted by a modification of the elements which define the major loop.