Читать книгу Design and Development of Efficient Energy Systems - Группа авторов - Страница 29

In Figure 2.6, an 8:4 compressor is composed of four full adders (F1-F4) and three half adders (H1-H3). The working principle of this compressor is analyzed as three inputs applied to the full adder (F1), and another three contributions given to another full adder (F2) and the last two inputs given to the half adder (H1). The sum obtained from this F1, F2, and H1 propagated to the full adder (F3). The carry which obtained from the F1, F2, and H1 given to another full adder (F4). The sum obtained from the F4 and the carry obtained from F3 provided to (H2) half adder. The sum output from full adder (F4) is the sum of the compressor Y1, the carry which obtained from the half adder (H2) and the carry obtained from full adder (F4) given to the (H2) half adder. The sum output from this half adder (H2) is compressor output Y2. Half adder (H3) output is the final output as Y3 and Y4.