A METHOD FOR READING A PASSIVE MATRIX-ADDRESSABLE DEVICE AND A DEVICE FOR PERFORMING THE METHOD

摘要

In a method for reading of a passive matrix-addressable device, particularly a memory device or a sensor device with individually addressable cells of a polarizable material, the cells store data in the form of one of two polarization states +Pr;-Pr in each cell, and the polarization states in the cells are written and read by addressing via electrodes which form word and bit lines (WL;BL) in an orthogonal electrode matrix, and wherein the cells are provided in or at the crossings between the word and bit lines (WL;BL) a voltage pulse protocol is used according to which electric potentials on all word and bit lines are controlled coordinated in time. During reading a word line (WL) is activated by applying voltage which relative to the potential on all crossing bit lines (BL) corresponds to the voltage VS and data stored in the cells connected to this active word line (AWL) are determined by detecting the charge values of the cells in a detection means (SA). In a device for performing the method electric potentialson all word and bit lines (WL;BL) are controlled coordinated in time by therewith connected control means which implements the voltage pulse protocol. - Use in passive matrix-addressable memory and sensor devices.