Analog to digital converters and encoders therefor

摘要

A digital encoder, for producing a digitally coded output data signal in dependence upon input address signals, comprises a plurality of address lines (WL), for carrying respective input address signals, connected to control inputs of switching devices (42) for bringing about changes in logic level of data lines (BL), for delivering the said output data signal, to which those devices (42) are connected. Two of the address lines (WL) are connected to respective inputs of a logic processor (41) having an output connected to the control input of a single one of the said switching devices (42) that is connected to one of the said data lines (BL), thereby enabling signals on the said two address lines (WL) to control the logic level of the said one data line (BL) through the said single switching device (42). <IMAGE>