Patent US 3,935,474

In a logic cell, a plurality of gates are serially connected and responsive to signals on a plurality of conductors to perform a particular logic function. The gates are responsive to subsystem clock signals which control the operation of the gates to delay the output of the logic cell. The cell includes at least one ratioless gate, and at least one ratioed gate. The ratioless gates provide high speed and reduced size, while the ratioed gates provide low noise characteristics. In combination, the ratioed gates, which provide strong output signals, make excellent drivers for the ratioless gates which are particularly adapted to accommodate complex logic networks.