Register building block with series connected cells to save dissipation loss

摘要

A register building block is disclosed comprising binary memory cells of cross-coupled double emitter transistors which are fed from a source of constant current and addressed by raising the collector potential. Given a predetermined operating voltage, two memory cells are connected in series to save dissipation loss in each constant current circuit. A switch controlled by one bit of the address is used to select one memory cell from the addressed pair of memory cells. The circuit arrangement disclosed is utilized in highly integrated building blocks.