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Static Timing Analysis: VLSI

Name: Static Timing Analysis: VLSI
Rating: 4.4 (118 reviews)

Learn the timing parameters and design a circuit that will meet the timing requirements.

Created bySujithkumar MA

Last updated 10/2022

English

English [Auto],

What you'll learn

Perform Static Timing Analysis on a digital circuit
Figuring out the maximum operating frequency of any sequential circuit
Identify the timing violations and mitigate them
Identify all the timing paths in a circuit

Course content

4 sections • 18 lectures • 2h 21m total length

Introduction to the course4:21
This course introduces static timing analysis in VLSI design, covering combinational and sequential circuits, memory elements, delays, critical path, setup and hold times, and clock skew to determine frequency.
Types of Digital Circuits - Combinational, Sequential9:33
Differentiate combinational and sequential circuits; combinational logic has no memory, while sequential circuits include a memory element like a flip-flop. Analyze timing parameters for both types with static timing analysis.
2. Working of Latches8:46
Explore latch and flip-flop memory elements, focusing on how a latch stores a bit via feedback and an enable signal, while highlighting level-sensitive retention.
3. Working of Flipflops8:36
Explore how edge-triggered flip-flops act as memory elements in sequential circuits, responding only at clock edges (positive or negative) and retaining state between transitions.

4. Delays in Combinational Circuits12:26
Explore delays in combinational circuits through propagation and contamination delays, showing how inputs drive outputs without memory, and how static timing analysis uses these delays to predict stable outputs.
5 . Example - Critical Path in a Combinational Circuit6:21
Analyze a combinational circuit to determine propagation and contamination delays along multiple paths, identify the critical path, and confirm a worst-case delay of five nanoseconds.
6. Example 2 - Critical Path in a Combinational Circuit6:38
Apply static timing analysis to identify critical path in combinational circuits by propagation delays. Reordering to a parallel structure reduces critical path from 30 ns to 20 ns, boosting speed.

7. Timing specifications of a sequential circuit11:15
Explore timing specifications in sequential circuits with flip-flops, focusing on setup time, hold time, clock to Q delay, and contamination and propagation delays.
8. Setup time violation1:47
Cover setup time violations in sequential circuits, showing that input must be stable for a constant period before the clock; variation during this window causes violations.
9. Hold time violation1:04
Explore hold time violations in static timing analysis for VLSI by ensuring input stability after the clock edge and during the setup time. Distinguish all-time violations from proper timing.
10. Maximum frequency of a circuit10:49
Identify the critical path in a synchronous sequential circuit and compute the minimum clock period as clock-to-q delay plus propagation delay plus setup time to obtain the maximum frequency.
11. Setup time Analysis4:08
Analyze setup time violations by accounting for clock-to-Q delay, propagation delay, and setup time within the clock period. Compare data arrival time to data required time to determine timing safety.
12. Clock skew - Concept and the equation7:15
Explains clock skew in vlsi timing caused by routing delays reaching flip-flops at different times. Shows how buffers add deliberate delays to synchronize clocks and defines skew as delay difference.
13. Setup time Analysis on circuits with clock skews6:14
Derives the setup-time condition for circuits with clock skew, combining clock-to-q and propagation delays to determine the clock period and avoid setup-time violations.
14. Hold time Analysis8:01
Explore hold time analysis in timing, defining hold time as input stability after clock, and ensure contamination delay exceeds hold time; introduce buffers to the data path to prevent violations.

15. Example 2 - Maximum Frequency, Setup time analysis, Hold time analysis10:26
Identify the key maximum delay path in a sequential circuit, compute the minimum clock period and maximum frequency, and perform setup and hold time analyses for register-to-register paths.
16. Example 3 - Timing specifications given in ranges15:52
Learn to determine the maximum operating frequency when delays are given in ranges, using data arrival and required times with setup time analysis along the critical path.
17. Breaking down a complex circuit and performing STA8:15
Identify the circuit's critical path from the output, compute the maximum delay using clock-to-q and gate delays, and derive the minimum clock period for static timing analysis and maximum frequency.

Requirements

No, But a basic knowledge in Digital Electronics will help!

Description

Want to become a chip design engineer? Then, STA is mandatory for you!

Welcome to my course on 'Static Timing Analysis on VLSI Circuits'

This course will help you to design a digital circuit meeting all the timing constraints given.

The contents that we will be discussing in this course are

1. Types of digital circuits - Combinational, Sequential

2. Working of Memory Elements - Latches, Flipflops

3. Edge Triggering

4. Different delays in a combinational circuit - Propagation delay, Contamination delay

5. Critical path of a combinational circuit

6. Timing specifications of a sequential circuit

7. Launch Flipflop, Capture Flipflop

8. Setup time analysis & violation

9. Hold time analysis & violation

10. Different timing paths in a sequential circuit

11. Finding out the maximum delay (critical path delay)

12. Minimum clock period, Maximum operating frequency of the circuit

13. Data Required Time, Data Arrival Time

14. Slacks - Setup Slack, Hold Slack.

15. The concept of clock skew and its equation

16. Effect of clock skew on the maximum frequency of the circuit.

After understanding the concepts and the equations, Some example problems and interview questions will be solved in the last section.

A clock signal is used by sequential circuits to regulate the flow of system data. The maximum clock frequency that can be employed in the circuit can be calculated from a set of combinational and sequential components and the timing parameters that go with them. In this study, each flip-flop to flip-flop path in the circuit is looked at. Both the data setup time at the destination flip-flop and the propagation delays throughout the pathways are examined. Each flip-flop to flip-flop path can be checked to see if flip-flop hold times are satisfied after figuring out the maximum clock frequency. The circuit will function as intended if the contamination delays along each path are more than or equal to the target flip flop hold time.

Who this course is for:

Beginner VLSI Design Aspirants
Anyone who wants to design ASIC

Static Timing Analysis: VLSI

What you'll learn

Explore related topics

Course content

Review on the Fundamentals4 lectures • 31min

Static Timing Analysis on Combinational Circuits3 lectures • 25min

Static Timing Analysis on a sequential circuit8 lectures • 51min

Problems and Interview Questions3 lectures • 35min

Requirements

Description

Who this course is for: