You are designing an adder for the blindingly fast 2-bit RePentium Processor. Th

Question

You are designing an adder for the blindingly fast 2-bit RePentium Processor. The adder is built from two full adders such that the carry out of the first adder is the carry in to the second adder, as shown in figure 3.75. Your adder has input and output register and must complete the addition in one clock cycle. Each full adder has the following propagation delays: 20 ps from C_in to C_out or to Sum (S), 25 ps from A or B to C_out, and 30 ps from A or B to S. The adder has a contamination delay of 15 ps from C_in to either output and 22 ps from A or B to either output. Each flip=flop has a setup time of 30 ps, a hold time of 10ps, a clock to-Q propagation delay of 35ps, and a clock-to-Q contamination delay of 21 ps. (a) If there is no clock skew, what is the maximum operating frequency of the circuit? (b) How much clock skew can the circuit tolerate if it must operate at 8 GHz? (c) How much clock skew can the circuit tolerate before it might experience a hold time violation?

Explanation / Answer

2- bit REPENTIUM processor

formed from 2 bit full adress!!!!!!!!Pentium is a brand used for a series of x86-compatible microprocessors produced by Intel since 1993. In its current form, Pentium processors are considered entry-level products that Intel rates as "two stars meaning that they are above the low-end Atom and Celeron series but below the faster Core i3, i5 and i7 lines as well as the high-end Xeon processors

If there is no clock,the operating frequency of the circui.10Ghrtz

the clock skew wen to operate in 8Ghrtz frequency is 3ps

before violating time then the skew clock will be 5.2ps

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