On-Chip Communication Architectures

270 CHAPTER 7 Encoding Techniques for On-Chip CA

signifi cant power dissipation. Figure 7.8 shows a coupled transmission line model

for bus lines in DSM [62]. In the fi gure, r is the series resistance per unit length of

the lines, C

L

is the capacitance to ground (or self-capacitance) per unit length, and

C

I

is the inter-wire capacitance (also called coupling or crosstalk capacitance) per

unit length between adjacent lines. In addition to its dependence upon technol-

ogy as well as structural factors such as wire spacing, wire width, wire length, wire

material, coupling length, driver strength, and signal transition time, the coupling

capacitance ...