Michael J. Mahon <mjmahon@aol.com> wrote:
In the so-caled "long-tailed pair", the input signal is applied to
one triode which functions as both a buffering inverter and as a
cathode follower to drive the cathode of the second triode which
is a gounded-grid non-inverting stage. The differential outputs
from the plates of the two triodes are used to drive the push-pull
stage(s) following.
The fairly large-valued common cathode resistor is the "long tail",
and the degeneration it provides makes the stage very linear.
I read this about ten minutes after coming across a post on a blog written
in Danish. I think I understood more of the Danish. :)