Figure 5 The above points are directly reflected on the switched pulse profiles and eye diagrams obtained in each catego- rized case, I or II. Thus, Fig. 5 shows that the XOR logical outcome suffers from unacceptable [17] peak amplitude fluctuations as well as from the appearance at bit slots of small pulses where they should be extinguished. The eye diagram is deformed to analogous sub-envelopes of distorted shape, which d egrade its quality. Nevertheless, Fig. 6 shows that these impairments are removed by the DI of optimized delay, si nce pulses occur according to the XOR truth table and ex hibit equal amplitude, while the