[Amps] Designing the Cleanest Linear with RF Negative Feedback

[TexasRF@aol.com]

Doesn't grounded grid/cathode driven operation provide much if not all of  
the degeneration/negative feedback we are discussing here?
 
73,
K5GW
 
 
 
 
In a message dated 12/14/2005 11:10:17 P.M. Central Standard Time,  
K1JJ at comcast.net writes:

Correction:

It was pointed out to me that the cathode resistor  for negative feedback is 
to be used only for a grid driven [grounded  cathode] amplifier to generate 
degenerative [negative] feedback.

In  a cathode driven [GG] amplifier, the cathode is in phase with the plate  
and it will not work. A different method must be used for neg  feedback.

This is why my GG triode did not show any diffence in drive  when I  tried 
the cathode resistor.

I saw the idea in the  archives and must have missed the fact that they were 
talking about grid  driven amps at the time.

73,
Tom, K1JJ  

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