NETEX-G Topics

Overview
• Introduction
• Applications
• User Interface
 
Inputs
• Gerber File Requirements
• Vias from Drill Data
• Layer Stackup
• Wire Bond Data
 
Assigning Nets and Nodes
• From ASCII Table
• From AIF
• From IPC356
• From GBRVU

Outputs
• ASCII Output
• Ansoft ANF
• Geometry Options
• GDSII
• DXF
 
Proximity Effect
• What is a Proximity Net?
• What is a Neighbor Net?
 
 
Extractions
• Extracting Nets
 
 
Netex Engine
• Program Flow
• Job File Syntax
• Command Line Syntax
• drl2gbr engine
• generating wire coords  

 

Components for Si-Wave

Background

The ANF 2.0 specification (which is the version written by NETEX-G and NETEX-O) does not include descriptions of components such as resistors, capacitors, inductors, active devices or transformers. So if you are converting a PCB into ANF for use with SI-Wave you must manually add this information in after the conversion.

The Ansoft component file is used together with the Ansoft Neutral Format (ANF) version 2 to define the location and electrical properties of components in a printed circuit board. References to net number, layer number, padstack number, and geometrical coordinates must be consistent with information defined in the ANF file. The format for the *.cmp file is shown below.

"X" lines specify pin parameters.


X <net #> 

  <start layer #> <end layer #> 

    <padstack #> <x> <y> <angle in degrees> 

      <part number> 

        <reference designator> 

          <pin number>

The net #, layer #s and padstack # correspond to values defined for nets, layers and padstacks in the ANF V2.




Example 1

B_RES "R28" "CC0603"
X 1 2 2 48 -3382.000000 -1650.000000 0.000000 CC0603 R28 2
X 438 2 2 48 -3318.000000 -1650.000000 0.000000 CC0603 R28 1
"???" "???" "???" "???"
E_RES

The four ??? strings at the end of each record in the CMP file are placeholders for the nominal element value, the parasitic capacitance, the parasitic inductance and parasitic resistance, respectively. Set to ??? if these values are unknown.


Example 2

B_CAP C54 CC0603
X 2 2 2 48 2257.000000 -900.000000 180.000000 CC0603 C54 2
X 266 2 2 48 2193.000000 -900.000000 180.000000 CC0603 C54 1
10n 0 1n 0.2
E_CAP

The record above defines a capacitor with a nominal value of 10nF, a parasitic inductance of 1nH and a parasitic resistance of 0.2ohms.


Example 3

B_IND "L26" "CC1206" 
    X 226 2 2 21 -1275.000000 -391.000000 90.000000 CC1206 L26 2
    X 223 2 2 21 -1275.000000 -259.000000 90.000000 CC1206 L26 1
    "???" "???" "???" "???"
 E_IND

Example 4

B_IC "D21" "1N5822" 
    X 356 2 12 2 2550.000000 -1050.000000 90.000000 1N5822 D21 1
    X 2 2 12 2 2550.000000 -450.000000 90.000000 1N5822 D21 2
    "???" "???" "???" "???"
 E_IC

Any active or semiconductor device (in this case a diode) is classfied as an IC.


Example 5

B_IO "SW1" "SW_6PDT_RA" 
    X 198 2 12 19 -905.950000 1276.300000 0.000000 SW_6PDT_RA SW1 16
    X 206 2 12 19 -905.950000 1176.300000 0.000000 SW_6PDT_RA SW1 17
    X 201 2 12 19 -905.950000 1076.300000 0.000000 SW_6PDT_RA SW1 18
    X 0 2 12 19 -905.950000 1576.300000 0.000000 SW_6PDT_RA SW1 13
    X 0 2 12 19 -905.950000 1476.300000 0.000000 SW_6PDT_RA SW1 14
    X 0 2 12 19 -905.950000 1376.300000 0.000000 SW_6PDT_RA SW1 15
    X 0 2 12 19 -905.950000 1876.300000 0.000000 SW_6PDT_RA SW1 10
    X 0 2 12 19 -905.950000 1776.300000 0.000000 SW_6PDT_RA SW1 11
    X 0 2 12 19 -905.950000 1676.300000 0.000000 SW_6PDT_RA SW1 12
    X 199 2 12 19 -805.950000 1076.300000 0.000000 SW_6PDT_RA SW1 9
    X 205 2 12 19 -805.950000 1176.300000 0.000000 SW_6PDT_RA SW1 8
    X 197 2 12 19 -805.950000 1276.300000 0.000000 SW_6PDT_RA SW1 7
    X 197 2 12 19 -805.950000 1376.300000 0.000000 SW_6PDT_RA SW1 6
    X 207 2 12 19 -805.950000 1476.300000 0.000000 SW_6PDT_RA SW1 5
    X 199 2 12 19 -805.950000 1576.300000 0.000000 SW_6PDT_RA SW1 4
    X 198 2 12 19 -805.950000 1676.300000 0.000000 SW_6PDT_RA SW1 3
    X 208 2 12 19 -805.950000 1776.300000 0.000000 SW_6PDT_RA SW1 2
    X 201 2 12 19 -805.950000 1876.300000 0.000000 SW_6PDT_RA SW1 1
    "???" "???" "???" "???"
 E_IO

Connectors and other passive devices such as switches are classified as IO.




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