Standard cell output driver connection system

Details Standard cell output driver connection system Standard cell output driver connection system

H - Electricity

03

K

328/158

H03K 19/173 (2006.01)

Patent

CA 1326887

STANDARD CELL OUTPUT DRIVER CONNECTION SYSTEM ABSTRACT OF THE DISCLOSURE Gates in standard cells for gate arrays and application-specific integrated circuits are divided into a logic element primitive and a driving element primitive to reduce the number of standard cells which need to be designed and laid out. A connection scheme is provided to connect the logic element of the standard cell to more than two output drivers or emitter followers. Each emitter follower includes an input and an output pin for connection to the switch or logic element output, and another pair of pins which provide a passthrough that emitter follower to the next emitter follower. By abutting the emitter followers to each other, the crossover connections permit an expansion of the number of usable output pins from the emitter follower.

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