Re: Backend & analog
hi
Digital design mostly follows top to bottom design approach.
System spec ----> Architecture level / behavioral design ----> RTL design--->Transistor level design.
also mostly semi custom approach is used for digital,in which library includes already designed and optimized blocks.
Where as Analog design the approach is bottom to top. It is always a full custom design, becoz specification meet in analog is difficult as compared to digital.
Thus there is not any specific tool or design library for good analog design.
Now there are some tools which follows top to bottom approach.This tool is AHDL
analog Hardware Description Lang.