DIFFERENTIAL SIGNALING - Advanced Signal Integrity for High-Speed Digital Design - page 311

7-7 Show that the modal voltages correspond to specific digital states for two
signal conductors. Use the following L and C matrices:

3 . 77

10 − 7

10 − 7 10 − 8 × 5 . 18 ×

L = H/m

10 − 8 5 . 18 × 3 . 77 ×

10 − 11

10 − 11 10 − 12 8 . 21 × − 4 . 26 ×

C = F/m

10 − 12

− 4 . 26 × 8 . 21 ×

7-8 Show that the modal voltages do not correspond to specific digital states
for three or more signal conductors. Use the following L and C matrices:

10 − 7 10 − 8 10 − 8

3 . 77 × 5 . 17 × 1 . 08 ×

10 − 8 10 − 7 10 − 8

H / m

L = 5 . 17 × 3 . 77 × 3 . 21 ×

10 − 8 10 − 8 10 − 7

1 . 08 × 3 . 21 × 3 . 77 ×

10 − 11 10 − 12 10 − 12 8 . 21 × − 4 . 25 × − 3 . 74 ×

F/m

10 − 12 10 − 11 10 − 12 C = − 4 . 25 × 8 . 21 × − 4 . 25 ×

10 − 12 10 − 12 10 − 11 − 3 . 74 × − 2 . 04 × 8 . 19 ×

7-9 Use modal analysis to calculate the far-end (forward) crosstalk between
two single-ended lines using the matrices in Problem 7-7, and compare it
to the crosstalk from a differential pair to a single-ended line using the
matrices from Problem 7-8.
7-10 Create a SPICE model that proves how routing guidelines that force signal
lines to be routed at 10 ◦ or greater angles with respect to the board edge
mitigate the fiber-weave effect. ( Hint : Review Chapter 6.)