http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/ Design-Oriented_Analysis_D-OA Design Oriented Analysis Wed, 10 Apr 2013 05:53:18 GMT Dave B http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/415 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/415 Comments below... ... The AGC case is the one I am interested in. I'm thinking of the peak detector circuit more as a sample/hold kind of treatment. That seems Sun, 07 Apr 2013 14:28:03 GMT robfox682000 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/414 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/414 This is a great question, and one that I've thought about some, but I don't have complete answers. I"ve worked on AGC circuits some, and my students are about Sun, 07 Apr 2013 13:05:45 GMT brucedevelle http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/413 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/413 Hi Dave, Sorry no one has replied to your question, I wish I could help but I'm just starting out in D-OA and looking for answers myself. I'm semi-retired and Sun, 07 Apr 2013 13:04:20 GMT Bruce Develle http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/412 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/412 Hi Dave, Sorry no one has replied to your question, I wish I could help but I'm just starting out in D-OA and looking for answers myself. I'm semi-retired and Sun, 07 Apr 2013 02:52:07 GMT Dave B http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/411 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/411 Hm! I take it that since no-one has replied, my question is either poorly formed, or no-one knows the actual answer. So, would it be possible to use the GFT to Sat, 23 Mar 2013 05:33:55 GMT Dave B http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/410 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/410 Analog design of oscillators often proceeds as a feedback problem where the denominator of the second order response is set to zero to produce oscillation. The Tue, 05 Feb 2013 17:16:31 GMT propulse11 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/409 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/409 Hello, Thanks for your responses. We do intent to make the tool generally available. For public release however, it will need documentation and will need some Tue, 05 Feb 2013 09:43:28 GMT Frank Wiedmann http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/408 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/408 Hello, I am glad that you found my implementation of the General Feedback Theorem in LTspice useful and that you were able to implement an extended version of Sat, 02 Feb 2013 17:56:53 GMT garrett.neaves http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/407 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/407 I see that in my excitement regarding your posts that I overlooked that you gave some explanation of how you are using the GNT. You said "It is used to Sat, 02 Feb 2013 13:19:50 GMT garrett.neaves http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/406 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/406 Excellent news! It would be very interesting if you would say more on this forum. Are you making your implementation available to people with the necessary Sat, 02 Feb 2013 10:09:21 GMT propulse11 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/405 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/405 Hi all, After reading Garett Neaves' post (http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/373) in which Bruce states he is a bit Wed, 30 Jan 2013 16:49:36 GMT Michael Brown http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/404 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/404 http://www.advasos.com/components/com_content/mainx.php?hlsag=ii2c Michael Brown Tue, 29 Jan 2013 15:20:55 GMT xian.weng http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/403 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/403 robfox682000, Thank you.I understand now! Many thanks Tue, 29 Jan 2013 15:00:14 GMT robfox682000 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/402 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/402 It's easy to get signs confused. For one thing, the sign of loop gain can be defined different ways. That's why it's better to let insight into how the circuit Tue, 29 Jan 2013 14:25:03 GMT xian.weng http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/401 http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/message/401 Thanks a lot for your quick reply.I understand your method now.It is very convenient! You said loop gain is negative.But according to GFT,the formula (1) and