Hi Frank, I am Carlos and am new here in the group. It might be strange that I am getting into a very old discussion but I found it very interesting, first to...
Hi Carlos, I completely agree with you. T and Tn are of course very useful for designing feedback circuits. One should only be aware that if one sees a...
From: David Middlebrook. Hi Frank: About the Gray et al book [1] and the Wikipedia article [2]: Yes, they show the formula and block diagram for a single...
A while ago I had read the message #116 I vaguely recall and I forget what exactly it had but there was some good idea. Is there a way to find that message or...
tarzan0apes
tarzan0apes@...
Jul 24, 2008 7:25 pm
148
Hi John, I am new subscribe, but before I just read public web many months ago. Is there a complete archive of all the old and new messages, deleted and...
tarzan0apes
tarzan0apes@...
Jul 24, 2008 7:31 pm
149
Tarzan, If you go to the site you can read all the past messages. Go to http://groups.yahoo.com/group/Design-Oriented_Analysis_D-OA/ and click on messages. ...
Thats where I found this DOA a while ago. THERE ARE MISSING POSTS THERE NOW. YOU GAVES ME THE LINK WITHOUT VERIFYING FOR THE PRESENCE OF THESE MISSING POSTS....
... A number of messages have been deleted from the archive on Yahoo because they did not contain any real information and obscured the relevant messages in...
... I'll add that I keep a complete, separate store of all messages I receive by email, the way I prefer accessing these groups. The only messages I delete...
Sir, I am novice engineer working in DC-DC switching power supplies.For that please send me the Files accessible to Group Members that are the Final reports...
Hello; I'm new to the group, but I'm hoping to jump into this discussion. I'm trying to understand how to apply the GFT for hand analysis of feedback...
From: David Middlebrook Hi Rob: The purpose of the GFT is to dissect the gain H of a feedback system into three transfer functions (TFs), the ideal closed-loop...
From David Middlebrook. Hi Rob: My Message #161 was a brief reply to your #159. I've made a followup, which I've uploaded as a File under Middlebrook Articles ...
hope u r well I searched on internet(google ) for the middlebrooks closed transfer function and for open loop but didn't find any thing to fulfill my needs...
 Hi,  I have a question about bode plot measurement setup of a switching converter.  In measuring the close frequency response of a dc/dc converter, it...
... converter. ... is a well-known practice that the closed loop needs to be broken to insert a low value resistor (to inject the perturbation signal across ...
... switching converter. ... it is a well-known practice that the closed loop needs to be broken to insert a low value resistor (to inject the perturbation...
 Thanks, Frank. I went through the algebra in the paragraph below and yes it yields the formula in my email.   Regards.  "You are measuring the voltage...
From: David Middlebrook. Hi Neil:The expression you quote was developed in my 1975 paper, which can be downloaded from the Files section of this Group: ...
Mark, You will obtain the expression if you solve equation (18) for T. Z1 corresponds to Zin, Z2 to Zout. Best regards, Frank ... measurement related question ...
 I read this paper and it was very usefull in understanding issues related to loop response measurement. I have some other question that I tried to solve by...
Mark, You might want to contact Venable Industries and ask them how the formula was derived and under what conditions it is valid. What strikes me is the fact...
As a matter of fact, I did contact Venable Industries through email but they didn't respond to my question. Maybe I should try once more...  Mark. ... ...
From: David Middlebrook. The expression in question is T =(T1+T2+2T1T2)/(1 – T1T2) (Eq.1) (Sorry, I have to keep to my own notation, with T1= -GAIN1, etc....
The capacitors just represent input, feedback and load elements in a typical example of a fully differential amplifier circuit. Actual values would depend on...
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