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 Forum index » DIY Hardware and Software
ian fritz/jerkster build question
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youssef



Joined: Sep 18, 2018
Posts: 11
Location: madison

PostPosted: Sun Feb 02, 2020 4:56 pm    Post subject: ian fritz/jerkster build question Reply with quote  Mark this post and the followings unread

http://ijfritz.byethost4.com/Chaos/ch_cir2.htm

Hi all - was just revisiting the Jerkster after some time and I noticed a questionable thing on the schematic.
In the circuit block at the top of the page, the inverting and non-inverting inputs are attached to the non-inverting and inverting inputs of the OTA.

Can anyone confirm which arrangement is correct?
Does it matter?
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AlanP



Joined: Mar 11, 2014
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Location: New Zealand
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PostPosted: Sun Feb 02, 2020 10:21 pm    Post subject: Reply with quote  Mark this post and the followings unread

In the one I built, I used the schematic as shown, and it worked for me.
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youssef



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PostPosted: Mon Feb 03, 2020 3:54 am    Post subject: Reply with quote  Mark this post and the followings unread

so, for the + inputs on the general circuit blocks, you were actually connecting to the - input of the OTA?
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AlanP



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PostPosted: Mon Feb 03, 2020 7:55 am    Post subject: Reply with quote  Mark this post and the followings unread

yep
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youssef



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PostPosted: Mon Feb 03, 2020 11:11 am    Post subject: Reply with quote  Mark this post and the followings unread

I can confirm this arrangement works. I guess the idea is that two inverting makes a non-inverting, etc..
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