17-10-2017, 12:21 PM
Large-scale integration (VLSI) is the process of creating an integrated circuit (IC) by combining thousands of transistors into a single chip. VLSI began in the 1970s when complex semiconductor and communication technologies were being developed. The microprocessor is a VLSI device.
Prior to the introduction of VLSI technology, most integrated circuits had a limited set of functions they could perform. An electronic circuit may consist of a CPU, ROM, RAM and other glue logic. VLSI allows IC designers to add all of these on a single chip.
The electronics industry has achieved phenomenal growth in recent decades mainly due to rapid advances in large-scale integration technologies and systems design applications. With the advent of large-scale integration designs (VLSIs), the number of integrated circuit (IC) applications in high-performance computing, controls, telecommunications, image processing and video and consumer electronics has grown at a very high rate Quick.
Today's state-of-the-art technologies, such as high resolution and low bit rate video and cellular communications, provide end users with a marvelous amount of applications, processing power and portability. This trend is expected to grow rapidly, with very important implications for the design and design of VLSI systems.
VLSI Design Flow
The design flow of the VLSI IC circuits is shown in the following figure. The various levels of design are numbered and the blocks show processes in the design flow.
The specifications come first, abstractly describe the functionality, interface and architecture of the digital IC circuit to be designed.
Behavioral description is created to analyze the design in terms of functionality, performance, compliance standards and other specifications.
The description of RTL is made with HDL. This description of RTL is simulated to test functionality. From here we need the help of EDA tools.
The RTL description is converted to a list of gate-level networks using logical synthesis tools. A gateway level netlist is a description of the circuit in terms of gates and connections between them, which are made in such a way that they meet the specifications of time, power and area.
Finally, a physical design is made, which will be verified and then sent to the manufacturing.