H03K 19/17716

Logic circuits, i.e. having at least two inputs acting on one output ; Inverting circuits using specified components using elementary logic circuits as components arranged in matrix form the logic functions being realised by the interconnection of rows and columns {using an AND matrix followed by an OR matrix, i.e. programmable logic arrays with synchronous operation, i.e. using clock signals, e.g. of I/O or coupling register }