Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

help with opa320 on multisim

Status
Not open for further replies.

robse

Newbie level 2
Joined
Jul 2, 2015
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
14
Hello,

I'm exploring inverting and non inverting op amp circuits

Following a book of mine, I had success with the following circuit using an lmc6001.
However, using an opa320 for example, I can't get any amplified signal out of it

As a function generator I'm using 1Khz with 100mVp

Can someone explain what's going wrong ? How to obtain 10 times the voltage of the input ?

I can't even get it working without capacitors, and setting them to initial 2.5v didn't change anything.
In this example, function generator is set at 10kHz 100mVp amplitude 0 offset.
Here is what I get on the oscilloscope. Channel A is input RED, Channel B is output GREEN

original.pngoriginal2.png
 

crutschow

Advanced Member level 5
Joined
Feb 22, 2012
Messages
3,808
Helped
909
Reputation
1,816
Reaction score
892
Trophy points
1,393
Location
L.A. USA Zulu -8
Activity points
21,477
Don't offhand see any reason for it not to work.
What is the polarity of those .ic commands?
Try simulating for at least 500ms to see if anything changes.
 

robse

Newbie level 2
Joined
Jul 2, 2015
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
14
I ended up with the conclusion that the opa320 spice model is wrong.

In the latest release I see "* Version 3.0 : Correct for single-supply operation", but it doesn't work anyway
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top