Dummy cell arrangement for an mos memory

Abstract From the Canadian patent

A dummy cell arrangement is described for sensing the logic state of an accessed memory cell in an MOS memory in which a memory cell capacitor of a given size is associated with each memory cell. In the preferred embodiment, a plurality of dummy cells are included, each of which has a dummy capacitor of substantially the same given size as a memory cell capacitor. When the state of an accessed memory cell is to be sensed its memory cell capacitor is coupled to a bit line to change the voltage thereon and a selected dummy cell capacitor is coupled to a pair of bit lines so as to effect substantially equal transfers of charge between the dummy capacitor and the bit lines to which it is …