Accession Number:

ADD002342

Title:

Binary Adder with Fast Ripple Carry.

Descriptive Note:

Patent Application,

Corporate Author:

DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s):

• Pridgen,Janius I.

Report Date:

1976-01-19

Pagination or Media Count:

11.0

Abstract:

The patent application describes a binary adder using a sequence of alternating pairs of stages. Each stage has a full adder including an exclusive NOR circuit and a fast ripple carry gate. The carry in signal is fed to a logic gating circuit which becomes a sum output or is inverted and then becomes a sum output. The necessity for inversion is dependent upon gating signals applied to a pair of CMOS transistors, which are derived by the exclusive NOR circuit that is connected to the addend and augend inputs.

Descriptors:

• *Binary processors
• Patents
• Digital computers
• Logic circuits
• Arithmetic units

Subject Categories:

• Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE