Hi <@U01819B63HP> I wants to design BGR, but getting error with pnp transistors

ALOK PRATAP SINGH

07/10/2023, 5:15 AM

Hi @Stefan Schippers I wants to design BGR, but getting error with pnp transistors

Stefan Schippers

07/10/2023, 7:30 AM

Please send the BGR_dc.sch, i will test here.

ALOK PRATAP SINGH

07/11/2023, 6:06 AM

image.png

ALOK PRATAP SINGH

07/11/2023, 6:07 AM

hi @Stefan Schippers , like this way you were expecting?

Stefan Schippers

07/11/2023, 6:50 AM

No, I need the schematic file you are opening with xschem, it is

BGR_dc.sch

, the circuit shown in the image.

ALOK PRATAP SINGH

07/11/2023, 8:58 AM

I have no idea how to share it. but i am sharing

ALOK PRATAP SINGH

07/11/2023, 8:59 AM

BGR_dc.sch,BGR_dc.pdf

BGR_dc.sch

ALOK PRATAP SINGH

07/11/2023, 9:01 AM

image.png

ALOK PRATAP SINGH

07/11/2023, 9:02 AM

is it correct now @Stefan Schippers

Stefan Schippers

07/11/2023, 1:43 PM

Yes you have attached the BGR_dc.sch, that was what i needed. Will try to look at it.

Stefan Schippers

07/11/2023, 1:47 PM

I have run the ngspice simulation on your circuit, it ran fine without errors

Stefan Schippers

07/11/2023, 1:49 PM

Just a comment, in your .control block you are writing the BGR_dc.raw file twice, this is not needed...

Copy code

.option reltol=1e-5
+  abstol=1e-14 savecurrents
.control
  save all
  op
  write BGR_dc.raw
  remzerovec
   write BGR_dc.raw
   set appendwrite
   print v(Vref)
.endc

ALOK PRATAP SINGH

07/12/2023, 5:30 AM

yes @Stefan Schippers you are correct, but could you check once my pnp is correct or not? i feel it's incorrect because in your pnp name

pnp_05v5_W3p40L3p40

and in my pnp name is

pnp_05v5

. Tell me how to write like you.

ALOK PRATAP SINGH

07/12/2023, 5:32 AM

@Stefan Schippers could you show me you pnp edit properties.

Stefan Schippers

07/12/2023, 1:56 PM

@ALOK PRATAP SINGH I have simulated your circuit with no changes, so if you don't get simulation running it means that the pdk installation is not correct or too old. I assume here you installed open_pdks, which in turn downloads skywater-pdk, adding lot of corrections including BJT models.

ALOK PRATAP SINGH

07/12/2023, 2:46 PM

thanks @Stefan Schippers I will follow this and come back to you.

ALOK PRATAP SINGH

07/12/2023, 2:46 PM

image.png

ALOK PRATAP SINGH

07/13/2023, 4:25 PM

@Stefan Schippers i did this but getting same

Stefan Schippers

07/13/2023, 9:53 PM

I don't know what to say. Your example works on my system. One thing you should try is to go into the open_pdks source directory you cloned from git, do another

make

followed by

sudo make install

. In some cases I had to run

make

twice to get all files in the pdk.

ALOK PRATAP SINGH

07/14/2023, 9:41 AM

@Stefan Schippers I uninstall open pdk and install again but getting same error.. could you please check any other possibilities.

Stefan Schippers

07/14/2023, 2:24 PM

No, do not uninstall, but after make run make a second time, then sudo make install

ALOK PRATAP SINGH

07/17/2023, 6:38 AM

I am following docker. its working properly. thanks for your constant support

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