drew.spriggs
Well-known member
Howdy,
I've been on that FET binge while looking at amp/preamp emulation, and came across the original Foolin' With FETS article which includes a push-pull stage. With that in the back of my mind while I was looking through other schematics, I noticed pretty much just everything uses a SRPP (or incorrectly described mu-amp).
I got to thinking - is the only reason we don't see the push-pull stages more that it's harder to find p-channel FETs, or was there something else going on? PP stages are a lot less complicated, don't require potentially noisy vref (these stages always seem noisy) and no electros needed.
Fired up the obligatory LTSpice and tried to see what I could come up with using off the shelf parts using the first stage of a modified BSIABII.
Not absolutely identical, but we're definitely in the ballpark!
Anybody else tried this sort of stage?
I've been on that FET binge while looking at amp/preamp emulation, and came across the original Foolin' With FETS article which includes a push-pull stage. With that in the back of my mind while I was looking through other schematics, I noticed pretty much just everything uses a SRPP (or incorrectly described mu-amp).
I got to thinking - is the only reason we don't see the push-pull stages more that it's harder to find p-channel FETs, or was there something else going on? PP stages are a lot less complicated, don't require potentially noisy vref (these stages always seem noisy) and no electros needed.
Fired up the obligatory LTSpice and tried to see what I could come up with using off the shelf parts using the first stage of a modified BSIABII.
Not absolutely identical, but we're definitely in the ballpark!
Anybody else tried this sort of stage?