Simulated many preamps from the web on TINA

  • Thread starter Thread starter m718
  • Start date Start date
  • Tags Tags
    Web
AI Thread Summary
Simulations of various preamp circuits on TINA are yielding unsatisfactory results, raising questions about potential errors in the simulation process or the viability of preamp models. Users suggest troubleshooting by replacing op-amps with voltage controlled voltage sources (VCVS) to isolate issues with the op-amp models or the simulation software itself. There are concerns about the readability of schematics, particularly with connection visibility and color contrast. Additionally, it was noted that the negative supply for the op-amp was incorrectly connected, which could affect circuit performance. Properly addressing these issues may lead to better simulation outcomes.
m718
Messages
88
Reaction score
0
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
 

Attachments

  • 1522.JPG
    1522.JPG
    12.3 KB · Views: 440
Last edited by a moderator:
Engineering news on Phys.org


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.
 
Very basic question. Consider a 3-terminal device with terminals say A,B,C. Kirchhoff Current Law (KCL) and Kirchhoff Voltage Law (KVL) establish two relationships between the 3 currents entering the terminals and the 3 terminal's voltage pairs respectively. So we have 2 equations in 6 unknowns. To proceed further we need two more (independent) equations in order to solve the circuit the 3-terminal device is connected to (basically one treats such a device as an unbalanced two-port...
suppose you have two capacitors with a 0.1 Farad value and 12 VDC rating. label these as A and B. label the terminals of each as 1 and 2. you also have a voltmeter with a 40 volt linear range for DC. you also have a 9 volt DC power supply fed by mains. you charge each capacitor to 9 volts with terminal 1 being - (negative) and terminal 2 being + (positive). you connect the voltmeter to terminal A2 and to terminal B1. does it read any voltage? can - of one capacitor discharge + of the...
Thread 'Weird near-field phenomenon I get in my EM simulation'
I recently made a basic simulation of wire antennas and I am not sure if the near field in my simulation is modeled correctly. One of the things that worry me is the fact that sometimes I see in my simulation "movements" in the near field that seems to be faster than the speed of wave propagation I defined (the speed of light in the simulation). Specifically I see "nodes" of low amplitude in the E field that are quickly "emitted" from the antenna and then slow down as they approach the far...

Similar threads

Back
Top