Monolithic analog READ-ONLY memory for character generation

Two novel circuit techniques are used. One is a compact analog memory element that is able to store a pair of coordinate values; eighty such elements can be placed on a 65/spl times/65 mil die. The other is a scanning technique that utilizes a resistive ladder network coupled to an array of common- emitter transistors, having obvious applications in other areas, for example as an analog-digital converting technique.