DC stabilized amplifier simulation issue

Hi
I'm trying to use Multisim 11 to simulate the circuit shown on page 10 of Linear Technology Application Note 21
When I do this the output of the LT1028 is pegged to the +ve supply rail.
Also the voltages on the supply pins of the LT1052 are nearly at the +/-15V supply rails rather than being +/- 5V (I can understand this one I think).
I'm guessing that the model for the LT1028 doesn't allow for the offset pins?
I attach the file...
Solved!
Go to Solution.
Attachments:
DC Stabilised Amplifier.ms11 ‏113 KB

Blush - idiot mistake please ignore previous.

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Timestep too small (chopper stabilized amplifier)

Hi All
I am trying to design a chopper stabilized amplifier using Multisim 7.
My circuit works before the amplifer stage. Today, I added a modulator, and every time I simulate, I get a "timestep too small" error message.
I tried increase the end time in transient analysis setting, but nothing works
I attached my circuit to this email, could someone please give me some assistant? I would be really appreciated
Thanks
Attachments:
Circuit4.zip ‏14 KB

Hi Tien
What verion of multisim are you using? I am using Multisim7
I tried the steps in the knowledge based for fixing the timestep too
small problem, unfortunately, it still can't solve the problem
For circuit4, I need to modify my Voltage control voltage source in order to fix the problem.
Now, I add a demodulator to my circuit which is just the same circuit as the modulator. Unfortunatly, I am getting the same "time step too small" problem again
Is there any other way to resolve this problem? I am running out of idea
I attached my circuit with the message, thanks in advance for your help
Attachments:
ChopperFixing.zip ‏19 KB

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I'm including a number of links which document this issue across multiple canon cameras. After doing a search on the canon forum, I can't find this particular issue, so I thought I'd post and see if we can get an official solution. (New to the Canon forums, so if I'm not looking in the right place, please let me know.)
In my opinion, the vimeo link illustrates this best. (and while the 2nd link says "solved" ... perhaps the solution could be described as "janky" at best.)
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If I understand you correctly... you're referring to a 3rd party lens designed to fit on a Canon EOS body as an "EF" lens -- not actually suggesting that Canon themselves make a lens that has the problem.
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Hi @Onanisland
Welcome to the HP Forums!
It is a great place to find answers and tips!
For you to have the best experience in the HP forum I would like to direct your attention to the HP Forums Guide Learn How to Post and More
I understand that after doing some updates your Instant Text is no longer functioning fully.
If you click on the shield or logo or perhaps right click do you get any additional details?
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hi
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Hi Thanx for your immediate reply... here's the attahement for ref....
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