Crosstalk and Crosstalk delay effects CMOS by VLSI Universe - April 23, 2020July 21, 20210 In the SI of Physical design, the design will be verified for crosstalk, crosstalk noise, and delays. In the situation when one of the wire switches, the wire will tend to change or affect its neighbor through capacitive coupling. This effect is called Crosstalk. The digital design functionality and its effective performance can be limited by noise. This noise occurs mainly due to the crosstalk with other signals. And it also may occur due to noise on primary inputs or the power supply Vdd. Crosstalk delay effects In the situation when the wire and its neighbor wire are switching simultaneously, the direction in which both are switching will affect the amount of capacitance that must be delivered to the destination and also the
Method of logical effort | Multi-stage networks CMOS by VLSI Universe - April 22, 2020July 20, 20210 Designing a circuit with great speed or to meet the delay constraints, we need to find the fastest logic function. The optimized implementation of a logic function with great speed is a key task. The method of logical effort is the easiest way to calculate the delay in the MOS circuit. This method specifies the proper number of various logic stages on a path and the appropriate size of the transistor for the gates. Let us see how we can calculate the delay of the circuit and what are parameters we need to know. 1. The delay in a logic gate (d) The delay in a logic gate is mainly due to two components. The parasitic delay (p) and the stage effort/effort delay
