Tube DIY Asylum

RE: When negative feedback is not beneficial

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cellailuca

In Reply to: RE: When negative feedback is not beneficial posted by cellailuca on January 10, 2024 at 01:36:40

These are the simulated V+ and V- outputs when the circuit gain from input (1 V peak) to output is one.
The massive feedback causes zero crossing distortion!

Omnes feriunt, ultima necat.

Follow Ups:

RE: When negative feedback is not beneficial - cellailuca 01:47:06 01/10/24 (1)
These are the V+ and V- outputs and the V+ spectrum with no feedback at all.
It looks like an honest circuit.

Omnes feriunt, ultima necat.
- RE: When negative feedback is not beneficial - cellailuca 01:54:15 01/10/24 (0)
  These are the V+ and V- outputs and the V+ spectrum with about 10 dB feedback.
  Apparently the distortion goes up to about -30 dBc with respect to the zero feedback case (-40 dBc).
  This is basically a bad circuit...
  
  Omnes feriunt, ultima necat.

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