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Ocean Script for differential amplifier

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Surely understand meaning of #8.
First of all, Spectre does not launch at all due to syntax error of netlist.
Surely see and understand logfile of Spectre.

And even if Spectre does run, post processing will fail since you don't define I, W, L at all.

And your "input.scs" does not include "paramset statement".

Narakiran said:
netlist header
Click to expand...
You can not understand Cadence ADE at all.
Surely learn very basic operation.

I recommend you to attend kindergarten level training of Cadence ADE.

Narakiran said:
I have to write code for Nelder-Mead method in Ocean.
Click to expand...
https://en.wikipedia.org/wiki/Nelder–Mead_method

Use ADE-GXL or OCEAN-XL.

The following fragments are case when we don't use Spectre's "paramset" ability.
Code: 
I_list = list(150u, 155u, 170u, 180u)
W_list = list(0.5u, 0.8u, 0.9u, 1u)
L_list = list(10u, 15u, 17u, 22u)

n = length(I_list)
for(i, 0, n-1
  I = nth(i, I_list)
  W = nth(i, W_list)
  L = nth(i, L_list)

  desVar("I", I)
  desVar("W", W)
  desVar("L", L)

); for
 

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Last edited:
I_list = list(150u, 155u, 170u, 180u)
W_list = list(0.5u, 0.8u, 0.9u, 1u)
L_list = list(10u, 15u, 17u, 22u)

n = length(I_list)
for(i, 0, n-1
I = nth(i, I_list)
W = nth(i, W_list)
L = nth(i, L_list)

desVar("I", I)
desVar("W", W)
desVar("L", L)

); for
Click to expand...

I have used this but still the code is not working.
Please can you check it once.

The code is
-----------------------------------------------
[CODE}
prt=outfile("/home/15vl21f/anil.csv" "w")
simulator( 'spectre )
design( "/home/15vl21f/simulation/diff_amp/spectre/schematic/netlist/netlist")
resultsDir( "/home/15vl21f/simulation/diff_amp/spectre/schematic" )
openResults( "/home/15vl21f/simulation/diff_amp/spectre/schematic" )
modelFile(
'("/opt/cad/cad/FOUNDRY/analog/180nm/models/spectre/gpdk.scs" "stat")
)

I_list = list(150u, 155u, 170u, 180u)
W_list = list(0.5u, 0.8u, 0.9u, 1u)
L_list = list(10u, 15u, 17u, 22u)

analysis('ac ?start "10" ?stop "100G" )
analysis('dc ?saveOppoint t )

fprintf(prt "I, W, L, Gain, Bandwidth, overdrive, tail_current\n")

n = length(I_list)
for(i, 0, n-1
I = nth(i, I_list)
W = nth(i, W_list)
L = nth(i, L_list)

)

desVar("I" I)
desVar("W" W)
desVar("L" L)


envOption(
'analysisOrder list("dc" "ac")
)
temp( 27 )
run()


x = ymax(db20(VF("/vout")))
y = bandwidth(VF("/vout") 3 "low")
vth = pv("NM0" "vth" ?result "dcOpInfo")
vgs = pv("NM0" "vgs" ?result "dcOpInfo")
overdrive = vgs - vth
tail_current = 2 * pv("NM0" "id" ?result "dcOpInfo")
Gain = x
Bandwidth = y
fprintf(prt "%d, %f m, %f m,%f dB, %f Hz, %f V, %f A\n", I, W, L, x, y, overdrive, tail_current)

)
)
)
)
close(prt);[CODE}
Click to expand...
 

*Error* db20: can't handle db20(nil)

*Error* _ymaxMethod: can't handle _ymaxMethod(nil)

*Error* _bandwidthMethod: can't handle _bandwidthMethod(nil 3 "low" nil)
*Error* difference: can't handle (nil - nil)
*Error* load: error while loading file - "anil.ocn" at line 43
Click to expand...

Error is coming like this. I think the list of input values are not allocating to desVar.
 

Yes. I have changed it.

prt=outfile("/home/15vl21f/anil.csv" "w")
simulator( 'spectre )
design( "/home/15vl21f/simulation/diff_amp/spectre/schematic/netlist/netlist")
resultsDir( "/home/15vl21f/simulation/diff_amp/spectre/schematic" )
openResults( "/home/15vl21f/simulation/diff_amp/spectre/schematic" )
modelFile(
'("/opt/cad/cad/FOUNDRY/analog/180nm/models/spectre/gpdk.scs" "stat")
)

I_list = list(150u, 155u, 170u, 180u)
W_list = list(0.5u, 0.8u, 0.9u, 1u)
L_list = list(10u, 15u, 17u, 22u)

analysis('ac ?start "10" ?stop "100G" )
analysis('dc ?saveOppoint t )

fprintf(prt "I, W, L, Gain, Bandwidth, overdrive, tail_current\n")

n = length(I_list)
for(i, 0, n-1
I = nth(i, I_list)
W = nth(i, W_list)
L = nth(i, L_list)

desVar("I" I)
desVar("W" W)
desVar("L" L)

)
envOption(
'analysisOrder list("dc" "ac")
)
temp( 27 )
run()


x = ymax(db20(VF("/vout")))
y = bandwidth(VF("/vout") 3 "low")
vth = pv("NM0" "vth" ?result "dcOpInfo")
vgs = pv("NM0" "vgs" ?result "dcOpInfo")
overdrive = vgs - vth
tail_current = 2 * pv("NM0" "id" ?result "dcOpInfo")
Gain = x
Bandwidth = y
fprintf(prt "%d, %f m, %f m,%f dB, %f Hz, %f V, %f A\n", I, W, L, x, y, overdrive, tail_current)

)
)
)
)
close(prt);[CODE}
Click to expand...
 

Code: 
prt=outfile("/home/15vl21f/anil.csv" "w")
simulator( 'spectre )
design( "/home/15vl21f/simulation/diff_amp/spectre/schematic/netlist/netlist")
resultsDir( "/home/15vl21f/simulation/diff_amp/spectre/schematic" )
openResults( "/home/15vl21f/simulation/diff_amp/spectre/schematic" )
modelFile(
'("/opt/cad/cad/FOUNDRY/analog/180nm/models/spectre/gpdk.scs" "stat")
)

I_list = list(150u, 155u, 170u, 180u)
W_list = list(0.5u, 0.8u, 0.9u, 1u)
L_list = list(10u, 15u, 17u, 22u)

analysis('ac ?start "10" ?stop "100G" )
analysis('dc ?saveOppoint t )

fprintf(prt "I, W, L, Gain, Bandwidth, overdrive, tail_current\n")

n = length(I_list)
for(i, 0, n-1
I = nth(i, I_list)
W = nth(i, W_list)
L = nth(i, L_list)

desVar("I" I)
desVar("W" W)
desVar("L" L)

)
envOption(
'analysisOrder list("dc" "ac")
)
temp( 27 )
run()


x = ymax(db20(VF("/vout")))
y = bandwidth(VF("/vout") 3 "low")
vth = pv("NM0" "vth" ?result "dcOpInfo")
vgs = pv("NM0" "vgs" ?result "dcOpInfo")
overdrive = vgs - vth
tail_current = 2 * pv("NM0" "id" ?result "dcOpInfo")
Gain = x
Bandwidth = y
fprintf(prt "%d, %f m, %f m,%f dB, %f Hz, %f V, %f A\n", I, W, L, x, y, overdrive, tail_current)

close(prt);[CODE} [/QUOTE]

I don't know what else to do? Can you help me in this please.
Click to expand...
 

Surely consider loop structure of script.

Your issues are too trivial and low level,
discuss with students who are same level as you.
 

Narakiran said:
I'm a student. I'm working on Cadence - Virtuoso. I have to write Ocean script for following Algorithm. I'm completely new to Ocean. So please help me to write code for the algorithm View attachment 139526

The file is attached.
Click to expand...
Please help me to write Ocean Script for the algorithm which is attached.
Thank you.
 

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