filter design in ads

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Run SP Analysis with activating calculation of group delay.

If you would like to evaluate group delay as post processing, calculate it like following.
group_delay = -diff(unwrap(phaserad(S12),pi) )/ (2*pi)

However, I don't recommend calculation by post processing.
 
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hi thanks for your guide , i am so sorry , but i dont know do this work and work with sp analyzer. Please get more guidance


Many thanks to
 

pancho_hideboo said:
Read following.
http://edocs.soco.agilent.com/displ...ofS-ParameterSimulation-CalculatingGroupDelay
Click to expand...

again,thanks
mr works that i do , at first design a filter with layout
. then simulate that and saw result .such as s12,s11 ,phase.smith
after that i performed from tools menu after SI/PI ANALYZER clicked
then , performed options in this window.
finally, clicked ok. then make a schematic , in this schematic i dont know what ?????
also i simulation s parameter palette and term component and in the simulation s parameter and in parameter tab i perform group delay option, after that i did simulation . unfortunately below error :

Simulation / Synthesis Messages

Warning detected by hpeesofsim during netlist flattening.
Cannot find substrate `MSub1'.
Error detected by hpeesofsim during netlist flattening.
`Cros1': Expected a substrate model for parameter `Subst'.

Status / Summary


hpeesofsim (*) 370.600 Mar 3 2011 (64-bit built: 03/09/11 08:31:42)
Copyright Agilent Technologies, 1989-2011.
--------------------
Simulation terminated due to error.
--------------------

please guide me .
thanks
 

david20 said:
Warning detected by hpeesofsim during netlist flattening.
Cannot find substrate `MSub1'.
Error detected by hpeesofsim during netlist flattening.
`Cros1': Expected a substrate model for parameter `Subst'.
Click to expand...
Simply, necessary components don't exist in your schematic.

Show me your schematic.
 

pancho_hideboo said:
Simply, necessary components don't exist in your schematic.

Show me your schematic.
Click to expand...

today i dont have schematic in my office. tomorrow i show that to you. but when i selected sp/ip analyzer in layout and adjust options in this window , and after that a schematic was make and in this schematic perform group delay option .
do schematic was made isnot layouts schematic???
if isnot true , what do i do???

thanks
i will take to you my layout , tomorrow
 

 

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