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 Forum index » DIY Hardware and Software » Thomas Henry designs
LM13700 calculating Iout from Iabc and input
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Janvier



Joined: Aug 12, 2014
Posts: 13
Location: Montréal

PostPosted: Tue Aug 12, 2014 9:28 pm    Post subject: LM13700 calculating Iout from Iabc and input Reply with quote  Mark this post and the followings unread

Hi everyone,

Im reading the datasheet of the LM13700. I want to know how to calculate Iout from Iabc and Vin without the use of the linearization diode. Im trying to understand this little IC. But its really unclear at this point and I really need some explanation.

But even better, if someone can explain me the configuration of the LM13700 around the TLC555 on VCO-555 it will be awesome. I understand the square wave core and that LM13700 is charging the capacitor with Iout. But I want to know how to calculate Iout from Iabc.

Also, on that same schematic, why is there voltage dividers on the differential inputs.

Thanks
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elmegil



Joined: Mar 20, 2012
Posts: 1616
Location: Chicago
Audio files: 14

PostPosted: Wed Aug 13, 2014 4:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

Check out these lectures by Professor Aaron Lanternman, he has one or two lectures dedicated to OTAs.

https://www.youtube.com/playlist?list=PLXnFQqfHz_iFcdOTqI-6_FpOf73LWGNnt
https://www.youtube.com/playlist?list=PLXnFQqfHz_iHHFepUHj2r-tWKyfouxX3H
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Janvier



Joined: Aug 12, 2014
Posts: 13
Location: Montréal

PostPosted: Wed Aug 13, 2014 5:40 pm    Post subject: Reply with quote  Mark this post and the followings unread

WHOAAA ! This is freakin awesome ! I got electronic course but don't know there was course specifically on synth design

Thanks a lot
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elmegil



Joined: Mar 20, 2012
Posts: 1616
Location: Chicago
Audio files: 14

PostPosted: Wed Aug 13, 2014 7:09 pm    Post subject: Reply with quote  Mark this post and the followings unread

Not sure if it's still there, but his site at Georgia Tech had a donate button too, to help support the videos.... Smile
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