Posted by Roy G Biv [ 4.46.117.23 ] on September 19, 2004 at 02:26:26:

In Reply to: negative feedback in Cathode follower amplifier output stages posted by manualblock on September 18, 2004 at 20:25:09:

Yep, you're right. The cathode resistor sets DC levels but also provides negative feedback of the AC signal. A bypass capacitor removes negative feedback while retaining the DC stability offered by the cathode resistor. The same thing goes for the emitter resistor in a transistor amp. Unbypassed (or partially bypassed) cathode/emitter resistors provide local feedback in a single gain stage.

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