Generating a rippled voltage supply

[taleebe]

in relation to this thread:https://www.physicsforums.com/showthread.php?t=179898&highlight=psrr

is anyone savvy enough with bjt followers on SPICE to loosely guide me through the process?

 

[berkeman]

Sure. You want to model a BJT power follower in SPICE? Can you post a copy of your SPICE deck?

 

[taleebe]

im thinking of a schematic like this with vin as a varying sinusoidal input(0-20 Mhz) of amplitude 200mv. I want vout to be reasonably flat across this range.Also at my output id like to have a DC of around 3.3V. It is also worth noting that my load sinks up to 1A of current.Is it worth a shot?

 

[berkeman]

That's a good start for a circuit to simulate, but I'd DC couple the output (delete C3). Which NPN BJTs were you thinking of simulating?

 

[taleebe]

i see...deleting C3 would let me have AC and DC at the output!
as for the type of NPN to use I am not really sure,right now its trial and error