Behavioral models of Analog Blocks in Spectre - AMS

[moisiad]

Hi

I am using both Spectre and AMS simulators. In order to run some fast simulations in large systems (e.g. PLL) i want to import some behavioral descriptions of basic circuits (PFD, Freq. divider).

As far as i know there are several "languages" in describing analog circuits (VerilogA, VerilogAMS, SpectreHDL). Can you please inform me for the following items:
1) Which of them are compatible with the above mentioned simulators?
2) Is there any tool to generate a behavioral description from schematic, or do i have to write the code?
3) Is is easy to modify a given behavioral description to an other (are there any tools) or it is done by hand.

Thanks

 

[sunking]

1. sepctre support all
2. you can write the code or
the lib ahdl include many example

 

[pi331133]

There is a good sample uder the cadence installation directory/tools/dfII/rfLib, you can read the SpectreRF user guide first. This user guide discuss how to use Spectre/SpectreRF to simulate RF circuit and system in detail, there is also an example for behavioral simulation for PLL, with Verilog Language. I think you'd better refer to this first.

 

[skal81]

You can visit the following site https://www.designers-guide.org/VerilogAMS/. You'll find documentation, exemples, theorical articles.
BTW, I'm not sure but I think VerilogAMS needs a special licence, different from the Spectre licence. You should check it.
There is also a model generator in Cadence, but I never used it. I think it helps you get your code right.

 

[tlihu]

Does Cadence support VHDL-AMS?

 

[eda4you]

Does Cadence support VHDL-AMS?

YES

 

[eng_Semi]

U also can use the verilog-A and verilog-AMS BUT u have to write the code, or u can use the pcell od generating the codes.

 

[rfsystem]

VHDL-AMS for AMS Designer is planned but not released

 

[kjjian]

plllib in cadence has some examples