Circuitry for complementing binary numbers

Details Circuitry for complementing binary numbers Circuitry for complementing binary numbers

1985-07-15

1987-11-24

Shoop, Jr., William M.

Communications: electrical

Audible indication

Percussion-type sound producer

364715, H03M 700

Patent

active

047092262

ABSTRACT:
Circuitry for forming the twos complement or ones complement of M-bit binary numbers is described. The circuitry includes M stages each of which contains an exclusive NOR gate. A first input terminal of the exclusive NOR gate is coupled to receive one bit of the input value and a second input terminal is coupled to receive the carry output signal from the previous stage. A logic one or logic zero is applied to the second input terminal of the stage which processes the least significant bit of the binary word if the circuitry is to provide a twos complement or ones complement value respectively. The carry output signal for each stage is generated by ANDing a logically inverted version of the input bit signal with the carry input signal applied to the stage. An application of the complementing circuitry in an absolute value circuit is also described. In this application, the carry input signal of each stage is ORed with a logically inverted version of the sign bit of the input value and the result is applied to the second input terminal of the explained NOR gate. This circuitry complements only negative values, passing positive values unchanged.

REFERENCES:
patent: 3949299 (1976-04-01), Song
patent: 4369500 (1983-01-01), Fette
patent: 4417315 (1983-11-01), Russell
patent: 4422143 (1983-12-01), Guttag
patent: 4486851 (1984-12-01), Christopher et al.
patent: 4520347 (1985-05-01), Campbell, Jr.

Affiliated with

Also associated with

Rating

Circuitry for complementing binary numbers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuitry for complementing binary numbers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuitry for complementing binary numbers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2424785