Home Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

Neutralization of Miller capacitance

Miller capacitance can be regarded as frequency-dependent negative feedback from plate to grid that reduces gain at high frequencies. In one of the old publications I have read about a technique allowing neutralization of this effect in differential amplifiers by connecting capacitors equal in value to Cpg between grids and opposite plates. These extra capacitors add positive feedback numerically equal to the negative feedback of Miller capacitance, thus neutralizing HF rolloff caused by the latter.

If it works as intended, isn't it a solution to driver problem for PP triode output stage? Like 2A3 PP driven by 6SL7 without loss of bandwidth. Or it is too good to be true?

This post is made possible by the generous support of people like you and our sponsors:
  Amplified Parts  

Topic - Neutralization of Miller capacitance - sser2 15:29:24 03/11/17 (24)


Post a Message!

Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.