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| 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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