MODELING AND BUDGETING OF TIMING JITTER AND NOISE - Advanced Signal Integrity for High-Speed Digital Design - page 585

Worst case

0010 00100 0 10100...

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

− 0.001 V

0.1 − 0.012 V

0.0

− 0.1

− 0.2 − 0.247 V

− 0.3

0 12345678

Time (ns)

9 10111213141516

(a)

Worst case

0100010001 00000...

1.2

1.1

0.0001 V

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.055 V

0.3

0.2

0.003 V

0.1

0.0

− 0.1

− 0.2

− 0.3

0 123456789 0 1 2 3 4 5 6

Time (ns)

(b)

Figure 13-25 Construction of the worst-case eye waveforms: (a) superposition of pulse
to create a worst-case 1; (b) superposition of pulses to create a worst-case 0; (c) worst-case
waveforms; (d) worst-case eye diagram; (e) close-up view of eye at the trailing edge.