It is made of realization of the electronic systems

1) It is made of the realization of a integrated circuit:

to)       Planning

b)       Fabrication

c)       Impacchettamento

d)       Test

 

2) It is made of the planning of a integrated circuit:

to)       Ideazione e Modellizzazione

b)       Synthesis and optimization

c)       Validazione subdivided in simulation and verification

 

3) Modellizzazione:

A model is particularly useful in the realization of circuits VLSI for which it is necessary to realize a sure abstraction, a model can be described in term of Sight and of Levels of abstraction, in particular it is had that the sights are

to)       seen behavioural (…it independently describes the circuit from its implementation )

b)       seen structural (…it describes one particular implementation of the circuit)

c)       seen physical

while the levels of abstraction are:

to)       architetturale level (…computazionale description of the modello) is one

b)       logical level (…is one description of the model in booleani terms)

c)       geometric level

 

4) Synthesis:

The synthesis always consists in the passage from the structural alla.vista behavioural sight but to the same level of abstraction, one is had therefore architetturale synthesis, one logical and one geometric. The architetturale synthesis in particular makes to correspond to the description of the functions carried out from the system, with of resources, their logons and the schedulazione of the times of execution.

 

5) Optimization:

The optimization is a process parallel to the synthesis process, it is face to optimize the area and the performances of a integrated circuit in particular the area is an extensive largeness therefore the area total turns out to be the sum of the areas of the component blocks while the performances are an intensive largeness, of the second rest to of the circuit currency a various performance, as an example for the combinatori circuits currency the time of delay along the critical distance that is that longest one, for the sequenziali circuits the time of cycle is estimated (…that is the long propagation the system in a cycle of clock) and the time of latenza (…number of necessary cycles of clock so that the circuit Pipeline type executes the function demanded) finally for complex circuits currency throughput (…the speed with which the system supplies the data in escape).

6) Simulation:

The simulation has concurred the development of integrated circuits VLSI through one more deepened acquaintance of the devices you and in particular of the MOS, the following types of simulation are had:

to)       process simulation

geometric characterization of the device supplies one

b)       simulation of dispositi to you

it concurs to simulate small blocks that constitute the integrated circuit, to such aim has in income the geometric data (…coming from from the process simulator) and some parameters it acclimatizes them while in escape the tensions are had and the currents let alone the values of the members you adorned to you. With the evolution of the integration technologies, the device simulators have had to implement ability to preview and to take advantage of the members you adorned to you and new models in a position to analyzing the physical effects that are introduced when the dimensions are reduced until to the levels put into effect them. The operation criterion previews a discretizzazione of the space and subsequently the resolution of the algebriche equations that derive from those differentiates them to the associated partial derivatives to every node of the structure.

c)       circuit simulation

The models generate you from the simulator of dispositi to you come use you in order to simulate a circuit of which beyond to the outline they come specifies the stimuli to you and the environmental conditions them. In kind these first 3 simulators make part of an integrated system of planning TCAD that ago give interface towards specific junior clerks to you.

d)       logical simulation

it concurs to simulate the operation of the circuit from a logical point of view being omitted all the constructive details, consider the logical doors as it blocks characterized from models generates to you from the TCAD.

and)       simulation works them

it consists in a simulation to behavioural level of the operation of the circuit, it must then be continuation from one logical synthesis and of circuit.

 

7) Verification:

The typology of verification are following:

to)       implemented to you

the model generated from a phase of synthesis with that one of departure consists in confronting as an example can be verified that the layout obtained by means of opportune software it corresponds to the circuit that was wanted to be implemented.

b)       Progettuale

It consists in verifying that in all the operation conditions do not take place anomalous situations.