![]() ![]() This increase or decrease of current finds only one current path to the B+ connection : the path through the tube to the plate resistor. How? Since the cathode resistor sees a fixed voltage at its cathode end, the perturbation at the amplifier's output provokes an increase or decrease of current flowing through the cathode resistor. Thus, any perturbation at the output is relayed to the phase splitter's plate resistor. The first is marked by the cathode side connection, where the output directly (or, somewhat indirectly, via a coupling capacitor or a zener or a voltage regulator) couples to the other side of the phase splitter's cathode resistor. The Tube CAD Journal, Totem-Pole Output Stage ![]()
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