Thursday, November 15, 2018

Information on VLSI design



These days, VLSI comprises chiefly of Back End and Front End designs. According to the industry experts, the front end design tends to include design verification via simulation, digital design by using HDL, including other verification techniques, design from design and gates for testability purpose. On the other hand, characterization and CMOS library design is what is covered in the backend design, besides fault simulation and physical design.

Diverse platform

Although Simple logic gates could be taken into consideration as SSI devices, parity encoders and multiplexers as MSI, VLSI world can be termed to be much more diverse than what is thought about it. The whole design does follow step by step procedure, where simulation follows every design step prior to be being used in the hardware or being moved onto the final step. Varying abstraction device levels as whole is regarded to be its major design steps.

·         Problem specification: This is regarded to be a high level system representation. Major parameters taken into consideration for this level are functionality, performance, fabrication technology, design techniques and physical dimensions. Between available technology, design economical viability and market requirements, it needs to be actually a trade-off. End specifications do include VLSI system functionality, power, speed and size. Joining the best vlsi training institute can help the person to understand better the specifications and in details.

·         Architecture definition: The basic specifications such as Floating point units used by the system like Complex Instruction Set Computer (CISC) or Reduced Instruction Set Computer (RISC) cache size of ALU number.

·         Functional design: The system’s major functional units are defined and facilitates interconnect requirement needs between units, electrical and physical specifications of every unit. A type of block diagram is then decided with the timing, output and input number, without any internal structure detail.

·         Logic design: At this level is developed actual logic. There are developed control flow, register allocation, word width, Boolean expressions, etc., while the outcome is termed as RTL (Register Transfer Level) description. It is either implemented with Verilog Gate reduction techniques and/or Hardware Descriptive Languages such as VHDL. Simple, small and effective logic implementation can be derived with the employment of Gate minimization technique.

·         Circuit design: Simplified logic implementation is provided by logic design and circuit realization is done in form of netlist through this step. Interconnects, transistors and Gates are placed appropriately to develop netlist. It is regarded as a software step and simulation is used to check its outcome.

·         Physical design: Netlist conversion into geometrical representation is best done through this step, with its outcome being termed as the layout. Few predefined fixed rules are followed by this step such as lambda rules that offers similar details on ratio, spacing and size between the different components. There are present few sub-steps which are taught in the vlsi design training program offered by the reputed and well established institutes across the country.

Those eager to get into the lucrative career of VLSI should definitely select the very best institute in the domain to earn the certification after successful completion.

Author: verified_user