Simulated many preamps from the web on TINA

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SUMMARY

This discussion focuses on the challenges of simulating preamplifier circuits using TINA software. Users reported issues with component values disappearing after saving files and difficulties in visualizing schematics due to color contrast. A suggested troubleshooting method involves replacing Op Amps with voltage-controlled voltage sources (VCVS) set to a high gain of 100,000 to identify potential problems with Op Amp models or the simulation software itself. Additionally, incorrect wiring of the negative supply to the Op Amp was identified as a common issue.

PREREQUISITES
  • Familiarity with TINA simulation software
  • Understanding of Op Amp and VCVS functionality
  • Basic knowledge of circuit schematic reading
  • Experience with SPICE-based simulation tools
NEXT STEPS
  • Research troubleshooting techniques for TINA simulation errors
  • Learn about voltage-controlled voltage sources (VCVS) in circuit simulations
  • Explore best practices for schematic design in TINA
  • Investigate common Op Amp models and their simulation characteristics
USEFUL FOR

Electronics engineers, circuit designers, and students working with TINA or similar SPICE-based simulation tools who are troubleshooting preamplifier circuits.

m718
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I simulated many preamps from the web on TINA and none of the circuits show proper results
am I doing something wrong or preamps can't be simulated? I tried transistor and opamp ones.
here is an example.
For some reason the component values are not there after I save the file.
here is the link "http://cds.linear.com/docs/Datasheet/lt1115fa.pdf"
under TYPICAL APPLICATIONS
 

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I don't use TINA but, in any SPICE based engine, you can troubleshoot your circuit by replacing the Op Amps with voltage controlled voltage sources. Make their gains 100000. If it works, you have a problem with your Op Amp models. If it does not, there is a problem with the program itself. A VCVS with high gain acts as an ideal Op Amp.

It is difficult to read the schematic. On my screen the connections appear yellow on white. Cannot see the dots as well. Please repost with black connections.
 


I don't see your negative supply to the op-amp.
 


dlgoff said:
I don't see your negative supply to the op-amp.

It's there, it's just connected incorrectly to the top amp. The supply wires need to be reversed on it.
 

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