Rush Cascode Regulator

Status
Not open for further replies.
Given the reputation of the Rush Cascode for high speed when used at the front end of an amplifier I thought it might be an interesting choice for a simple regulator circuit ??
 

Attachments

  • cap mult-3.jpg
    cap mult-3.jpg
    194.4 KB · Views: 579
  • cap mult-3.asc
    cap mult-3.asc
    4 KB · Views: 132
Hi Pawel,

The 47p Capacitor and 22k is a zobel across the MOSFET. I have found that real life MOSFETs love to oscillate and the zobel helps prevent it. I didn't need it so much for the simulation but including it reminded me that I may want to include it in any real design just-in-case I experience problems later. I'm not convinced that I will use a MOSFET if I build this design, I may opt for a BJT instead simply because I am more familiar with designing and using BJTs rather than MOSFETs. I have both types of power transistor in my stock.


Hi Franz,

Yes, you are correct, in this incarnation there is no absolute voltage reference. It could be added of course, a simple zener could be used to hold the base of Q1 at the desired voltage.
 
Last edited:
Status
Not open for further replies.