often too high to be of use and is brought down further by feedback.
   The same choices faces the OTL amplifier designer and the choice has usually been in favor of the second option.  Since gobs of feedback will probably be needed even with Cathode Follower outputs, adding more to the higher gain Grounded Cathode mode can be risky. Feedback works on the assumption that what is being fed back is negative

nature, that it will act to reduce the gain of the amplifier. If feedback becomes positive, the gain increases, and increases until amplifier becomes an oscillator. The more gains stages an amplifier has, the greater the chance that the signal's progressive phase shift into dangerous positive range.
We will continue this thread next month (don't forget, rush).
                                   // JRB

Push-Pull Grounded Cathodes

Push-Pull Cathode Followers

pg. 4


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