Electrical Properties of Gold-Doped Diffused Silicon Computer Diodes

Iii transistor circuits designed for high-speed switching or computing operations, computer diodes may perform useful functions. Often the use of computer diodes for such functions as pulse gating or shaping can lead to simplification of logic design, reduction of the number of transistors required and relaxation of circuit tolerances. With high-speed transistor circuitry, these benefits are most readily obtained when the switching times for the computer diodes are comparable to or less than those of the associated transistors. Diffused silicon transistors with good switching characteristics and switching times on the order of 20 millimicroseconds are available.1 Accordingly, in logic or switching circuits using fast silicon transistors, computer diodes can be used most advantageously if their switching times can be reduced to the low millimicroseconds. Where the use of silicon transistors is contemplated, comparable leak87 88 T H E B E L L SYSTEM TECHNICAL J O U R N A L , JANUARY 1 9 6 0