Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2000.11d
- /
- Pages.781-783
- /
- 2000
Analysis of Positive Logic and Negate Logic in 1bit adder and 4 bit adder 74LS283
1bit 전 가산기와 4bit 덧셈 연산기 74LS283에서 의정 논리와 부 논리에 대한 분석
- Chung, Tong-Ho (School of Electrical and Electronics Engineering. Chung-Ang Univ.) ;
- Chung, Tea-Sang (School of Electrical and Electronics Engineering. Chung-Ang Univ.) ;
- You, Jun-Bok (School of Electrical and Electronics Engineering. Dept. of Control & Instrumentation Engineering, Chung-Ang Univ.)
- Published : 2000.11.25
Abstract
1bit full adder have 3 input (including carry_in) and 2 outputs(Sum and Carry_out). Because of 1 bit full adder's propagation delay. We usually use 4-bit binary full adder with fast carry, 74LS283. The 74LS283 is positive logic circuit chip. But the logic function of binary adder is symmetrical, so it can be possible to use it not only positive logic but also the negative logic. This thesis use symmetrical property. such as
Keywords