Need help with TI model DRV134 (causing fatal error)

QSPICE
1

I am trying to simulate a simple balanced mixer to mix two audio signals together using a line driver and line receiver. The line driver is the TI DRV 134. The receiver is the Burr Brown INA137.

I downloaded both models from the TI website. The INA 137 works fine, however, the DRV 134 is causing the fatal error (can’t find subcircuit). Sometimes it claims to not find the .tran command when it is clearly there.

The model has a subcircuit embedded in it called OPA 1. I think it’s not being added correctly, but this is a pspice model so you never know really.

Here is a link to the model in question
https://www.ti.com/product/DRV134

Here is the .qsch file
Balanced Mixer.qsch (15.5 KB)

Please help…

2

In auto symbol generation, you have to select Include Entire File option to include child subckt in library file. Here is a reference about Include Entire File
https://forum.qorvo.com/t/mov-subcircuit-component-check-pbkac/21458/2

In addition, TI DRV134 Pspice model file needs a modification to prevent it unintentionally end the netlist. Line#135 with .end command, this have to be removed. Here is .subckt netlist with that line comment.
DRV134.txt (4.0 KB)

And this is schematic which contain a functional DRV134 symbol
Balanced Mixer (Include Entire File).qsch (16.8 KB)

1 Like
3

Thank you KSKelvin! The Qspice community would be lost without you.

2 Likes