Full Member level 3
Suppose the maximum fan out of an AND gate is 4 and the output of this AND gate is connected to 4 similar AND gates. If the current coming out of the driver AND gate is i, then assuming each of the four devices get equal current, each driven AND gate gets i/4 of the current. Since the maximum fan out of the driver AND gate is 4, I cannot connect more gates to the driver since the current will be splitted again and the current in each branch will get reduced further. Suppose I insert buffers prior to the 4 driven AND gates so that the i/4 current is boosted back to i in all the four branches. Can I use this method to increase the fanout value of a cell because the current requirement in the branches get satisfied?