Читать книгу Design and Development of Efficient Energy Systems - Группа авторов - Страница 31

In Figure 2.8, a 12:5 compressor is made of five full adders, two half adders, and two 4:3 compressors. The working principle of this compressor is three inputs given to the full adder (FF1), another three contributions given to the full adder (FF2), another three contributions given to the full adder (FF3) and the last three inputs given to the full adder (FF4). The sum obtained from these full adders (FF1), (FF2), (FF3), and (FF4) is given to 4:3 compressor (CV1), and carry is given to another 4:3 compressor (CV2). The sum obtained from 4:3 compressor (CV1) is the Y1 output of the compressors. The carry1 of the 4:3 compressor (CV1) and the sum of the 4:3 compressor (CV2) acts as input to the (H1) half adder. Output sum of half adder (H1) is taken as output Y2. The carry2 of 4:3 compressor (CV1), carry of (H1) half adder and carry1 of the 4:3 compressor (CV2) is given to the full adder (FF5). The sum which is obtained from this full adder (FF5) is taken as output Y3. The carry of this full adder (FF5) and carry2 of the 4:3 compressor is given to half adder (H2). The sum obtained for half adder (H2) is taken as output Y4 and carry is taken as output Y5. In this compressor, we will provide 12 inputs, and 5 outputs will be obtained.

Figure 2.8 Compressor 12 to 5.

Figure 2.9 Compressor 15 to 5.