pulse transformer working?

Thread Starter

pawankumar

Joined Oct 28, 2009
42
hi,
I need to know the concept.i donot know how the pulse transformer works.books say rectangular pulses are reproduced at the output and it gives regenerative feedback.pls explain me..also what is regenerative feedback?
 
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Thread Starter

pawankumar

Joined Oct 28, 2009
42
also tell me how to make the thread topic bold:(..every time i fail in doing it and most of the threads go unseen
 

retched

Joined Dec 5, 2009
5,197
What is the requirement for the square wave?

Are you in need of a transformer or a DC to DC converter?

The DC to DC will give you a step up, or down keeping the output square.

Using pwm, or even a smps, will give you the chain of square pulses.
 

Thread Starter

pawankumar

Joined Oct 28, 2009
42
actually it is in my exam syllabus..it is required for blocking oscullators in base and emitter timing.i didnot get one point.since trf is a pair of inductors,how is dc transferred to the output first of all..
 

Ghar

Joined Mar 8, 2010
655
Switching DC isn't DC anymore.
DC is 'forever'.

DC voltage across an inductor is zero right? Can't have infinite current.
You can easily apply a square pulse though... you start at 0, current rises at a constant rate, then you shut it off and current stays at some high level.

If you're switching DC across a transformer or inductor you need to have zero average (0 DC). This is called volt-second balance.
http://ecee.colorado.edu/~pwrelect/book/slides/Ch2slides.pdf
 
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