amsut
Newbie level 5
Hi everybody, i'm the new commer in AMS field. I have faced the difficulties in using NanoSim for nearly a week, can anybody help me to solve it ?
My problem is, i have design some standar cell ( like nand,nor and,or, Dlatch ..etc ) and i wish to analyze their timming violation as well as their power consumption at transitor level. Firstly i have created the Hspice as well as the Verilog and Testbench for each every gates, after that i used NanoSim -VCS cosimulation to generate the Nanosim.out file, and finally i convert the NanoSIm.out file to The vectors.vec file by Edisplay. But the problem is, in my Vec file it contain a lot of violations, such like for an AND gate, when my 2 inputs are both 1, the output still unknown (U). I suggest that due to the analog model delay, and the smooth transition. Were that true ? And if yes how can i remove them .
I have compared the structure of my design with the NanoSim tutorial provided by SYNOPSYS, really i cant find any error. So i hope anyone who is experience in this field can help me out of this situation. Thank you very much.
Ah, and beside, how to calculate the leakage power dissipation of standar cell? Which tools will help us to do this task ?
My problem is, i have design some standar cell ( like nand,nor and,or, Dlatch ..etc ) and i wish to analyze their timming violation as well as their power consumption at transitor level. Firstly i have created the Hspice as well as the Verilog and Testbench for each every gates, after that i used NanoSim -VCS cosimulation to generate the Nanosim.out file, and finally i convert the NanoSIm.out file to The vectors.vec file by Edisplay. But the problem is, in my Vec file it contain a lot of violations, such like for an AND gate, when my 2 inputs are both 1, the output still unknown (U). I suggest that due to the analog model delay, and the smooth transition. Were that true ? And if yes how can i remove them .
I have compared the structure of my design with the NanoSim tutorial provided by SYNOPSYS, really i cant find any error. So i hope anyone who is experience in this field can help me out of this situation. Thank you very much.
Ah, and beside, how to calculate the leakage power dissipation of standar cell? Which tools will help us to do this task ?