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Using LT8228 LTspice module as a subcircuit in a hierarchical schematic design?

Chendy
on Nov 10, 2020

Hello,

I want to use an almost unmodified version of the provided 8228 example as a sub circuit as part of a hierarchical schematic.
(LTspiceXVII\examples\jigs\8228.asc)

I am new to LTspice, but have had success with hiarchacial schematics, using the Hierarchy → Open this sheets symbol → 'Shall I try to automatically generate one' approach. Adding ports to the 'subcircuit.asc'.

When I try run the 8228.asc as a sub circuit, the progress status in the bottom left hand side is unlike what I have seen other simulations. The simulation takes ages to try to simulate, then complains as per the below picture. See image below

Is it possible to use the 8228.asc or component as part of a hierarchical schematic design? If so, how?

My ultimate goal, is to create a multi test jig. So I can test multi aspects at the same time. Thus wanted to use the same sub-circuit many times.

thanks

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  • 0
    •  Analog Employees 
    on Dec 2, 2020 2:55 AM 2 months ago

    Hi, 

    Are you are trying to create a hierarchical block that contains the LT8228?

    If so, try to do the following steps:

    (1) Open the demo sim file for LT8228 and remove the input source and output load. 

    (2)  Add net names or labels to specific nodes that you want to retain in the schematic. i.e, To retain the input and output, label them as "INPUT" and "OUTPUT", respectively. Toolbar for adding net names are on the upper middle part of the LTSpice window. 

    (3) Click hierarchy >> open this sheet's symbol. Save symbol as .asy.

    (4) Create a new schematic, add component and locate the new hierarchy block for LT8228. 

    (5) Add source and load and run the simulation. 

    Note that all files should be on the same folder

    Regards, 

    Fritz

Reply
  • 0
    •  Analog Employees 
    on Dec 2, 2020 2:55 AM 2 months ago

    Hi, 

    Are you are trying to create a hierarchical block that contains the LT8228?

    If so, try to do the following steps:

    (1) Open the demo sim file for LT8228 and remove the input source and output load. 

    (2)  Add net names or labels to specific nodes that you want to retain in the schematic. i.e, To retain the input and output, label them as "INPUT" and "OUTPUT", respectively. Toolbar for adding net names are on the upper middle part of the LTSpice window. 

    (3) Click hierarchy >> open this sheet's symbol. Save symbol as .asy.

    (4) Create a new schematic, add component and locate the new hierarchy block for LT8228. 

    (5) Add source and load and run the simulation. 

    Note that all files should be on the same folder

    Regards, 

    Fritz

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