1. Describe the difference between a combinational and sequential circuit. What is the criticalcombinational path?2. Circle the critical combinational path through this circuit, andcalculate the propagation delay, tpd, with units (show your work):X1* *के जेDĐGATE2-input AND2-input ORtpd (ns)2530D Q3. Assuming the combinational logic above is the next-state logic of a FSM, and using flip-flops forstate memory with the following timing characteristics (from the 74LS74):t=25 nst₂ =20 nst₁ = 5 nsa. What is the minimum clock period, I min? Maximum clock frequency, f max? Show yourwork and label your values with units.b. Assuming a 5 MHz clock, what is the setup time margin? If you are unsure of youranswer above, you may use 185 ns as your I min

Answered: 1. Describe the difference between a…

Database System Concepts

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ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

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1. Describe the difference between a combinational and sequential circuit. What is the critical
combinational path?
2. Circle the critical combinational path through this circuit, and
calculate the propagation delay, tpd, with units (show your work):
X1
* *
के जे
D
Đ
GATE
2-input AND
2-input OR
tpd (ns)
25
30
D Q
3. Assuming the combinational logic above is the next-state logic of a FSM, and using flip-flops for
state memory with the following timing characteristics (from the 74LS74):
t=25 ns
t₂ =20 ns
t₁ = 5 ns
a. What is the minimum clock period, I min? Maximum clock frequency, f max? Show your
work and label your values with units.
b. Assuming a 5 MHz clock, what is the setup time margin? If you are unsure of your
answer above, you may use 185 ns as your I min

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Combinational circuit :

A combinational circuit is a type of digital logic device where the output is determined by the combination of inputs being used at the moment, completely disregarding the inputs' prior states. The fundamental component of combinational circuits is the digital logic gate.

Sequential circuit :

The input variable (X), computation circuit (logic gates), and output variable make up the sequential circuit, a combinational logic circuit (Z).

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