Electronics > Projects, Designs, and Technical Stuff
Is there any variable DC-DC converter suitable for pre-regulation?
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T3sl4co1l:
R16 is probably too small.  Sanity check: making C1 ever larger, won't do any good when C1 * R16 is already much longer than the duration of the oscillation. :)

Tim
xavier60:
Why not just have a diode between the CC op-amp and the Base of T1? Or a PNP Emitter follower. Then there will not be extra gain between the op-amp and the Darlington.

T3sl4co1l:

--- Quote from: xavier60 on September 26, 2018, 12:02:55 am ---Why not just have a diode between the CC op-amp and the Base of T1? Or a PNP Emitter follower. Then there will not be extra gain between the op-amp and the Darlington.

--- End quote ---

I guess that's not original enough. :-\

Tim
xavier60:

--- Quote from: T3sl4co1l on September 26, 2018, 12:07:06 am ---
--- Quote from: xavier60 on September 26, 2018, 12:02:55 am ---Why not just have a diode between the CC op-amp and the Base of T1? Or a PNP Emitter follower. Then there will not be extra gain between the op-amp and the Darlington.

--- End quote ---

I guess that's not original enough. :-\

Tim

--- End quote ---
This is. In my Agilent U8002A, the CC op-amp, via a diode, is able to pull down the Comp2 pin on the CV op-amp which is actually a connection between the transconductance stage and the input to the op-amp's output stage.  But HP thought of it first. :)
bloguetronica:

--- Quote from: T3sl4co1l on September 26, 2018, 12:07:06 am ---
--- Quote from: xavier60 on September 26, 2018, 12:02:55 am ---Why not just have a diode between the CC op-amp and the Base of T1? Or a PNP Emitter follower. Then there will not be extra gain between the op-amp and the Darlington.

--- End quote ---

I guess that's not original enough. :-\

Tim

--- End quote ---
Never though of that.

Kind regards, Samuel Lourenço
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