The basic difference between PCB and IC design is that PCB is simple.
DISCRETE DESIGN
|
IC’s
|
- No. of components
cells 10-100.
- Uses fabricated
components.
- Data sheets are used
for the circuit design.
- No design matching.
- Large area.
- More power required.
- High cost.
- Less time to design.
|
- No of components
large (million-billion).
- Designed and given
for the fabrication.
- Spice modules are
used for the circuit design.
- Design matching
requires.
- Very less area.
- Low power.
- Cost effective.
- More time to design.
- Can design 1000’s of
PCB design within one chip.
|
VLSI FLOW
It is
the hierarchy levels of process through the industry to fabricate the chip.
Mainly
there are three important flows.
- Full
custom flow.
- ASIC flow.
- FPGA.
FULL CUSTOM FLOW
Full
custom is designing of basic components to build the circuit. Designing starts
from the scratch.
It
contains the deriving of resistors, capacitors, inductors, transistors etc..,
Full
custom flow can be implemented to the following designs.
I.
Digital circuits
A.
Standard
cells.
B.
Memories.
C.
Inputs
and outputs.
II.
Analog circuits
A.
Op-amp.
B.
ADC/DAC.
C.
PLL.
