Abstract:
A radiation responsive semiconductor imaging device comprising an array of charge storage devices arranged in rows and columns on the surface of a semiconductor substrate. Each storage device includes a conductor-insulator-semiconductor structure in which minority carriers, controllably generated within the semiconductor in proportional response to incident electromagnetic radiation flux, are stored at the surface of the semiconductor beneath the conductor due to the application of a depletion region forming voltage to the conductor. Means are disclosed for transferring the integrated electrical charge from the storage region to a receiver region for electrical readout of the stored information. Means for reading out selected electrical charges while continuing to store other electrical charges are also disclosed. Means are also disclosed for altering the sensitivity of the array without a sacrifice in dynamic range.
Abstract:
A magnetic transducer for read-write applications is disclosed in which the magnetic circuit comprises a stack of laminations of generally ''''C'''' shape having a read-write winding inductively associated therewith. The read-write gap is provided by the opposed ends of the stacked laminations, and the laminations are of two different types; that is, they have different magnetic characteristics and are preferably of different materials. The outer laminations have relatively low initial permeability relative to the remaining laminations so that they are ineffective during the read operation but have sufficiently low coercive force so that they are magnetized during the write operation. The inner laminations of the stack have relatively high initial permeability so that they are magnetized during the read operation. In this way, the effective height of the stack and, accordingly, the width of the read-write gap is narrower during the reading operation than it is during the writing operation, being essentially equal to the total stack for writing and essentially equal to the inner laminations for reading.