What is the RC delay of the wire?

RC delay = the delay in signal speed through the circuit wiring as a result of these two effects. RC delay is important because it can become a significant obstacle to continued downward scaling of logic and memory devices that drive the performance of today’s multi-functional, mobile consumer electronic devices.

What is RC delay model?

The RC delay model is a metric used in VLSI design to calculate the signal delay between the input voltage and output voltage of the input signal. The input signal is a step function. In this case the transistor can be considered as a switch in series with a resistor.

What are the general properties of Elmore delay model?

A more accurate model is the Elmore delay model, which we will discuss here. The Elmore delay analysis model estimates the delay from a source (root) to one of the leaf nodes as the sum of the resistance in the path to the ith node multiplied by the capacitance present at the end of the branch.

What is propagation delay time?

In electronics, digital circuits and digital electronics, the propagation delay, or gate delay, is the length of time which starts when the input to a logic gate becomes stable and valid to change, to the time that the output of that logic gate is stable and valid to change.

How is the time constant for the Elmore delay calculated?

Time constant for the Elmore delay for an RC interconnect can be calculated by the formula (3) τ D i = ∑ i = 1 N R i k C i where N is the total number of nodes in the RC equivalent circuit, R i k is the resistance of the portion of the path to the C i and C i is the capacitance at node i.

Why do we use the Elmore delay model?

It provides a simplistic delay analysis that avoids time-consuming numerical integration/differential equations of an RC network. Generally, most circuits can be represented as an RC circuit with no loops.

How is the Elmore delay model for VLSI interconnect explained?

Distributed RC model of a VLSI interconnect. The Elmore delay model explains the delay from input to output of the input signal, which is of a step function type. If the step response of the RC circuit is h ( t), 50% point delay of the monotonic step response is the time T D that satisfies the following equation: (1) ∫ 0 T D h ( t) d t = 0.5.

Is the Elmore delay bound for generalized input signals?

The Elmore delay as a bound for RC trees with generalized input signals, IEEE Transactions on the Computer-Aided Design of Integrated Circuits and Systems, Volume: 16, Issue: 1, pp. 95-104. ^ Tutuianu, B., Dartu, F., and Pileggi, L.