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Thread: τοπολογίες & αρχιτεκτονικές και άλλα δαιμόνια

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    Default What does "push-pull" mean?

    Λίγα ακόμα γαι το PP class A για να θυνούνται οι παλιοί και να μάθουν οι νέοι.


    What does "push-pull" mean?

    In a push-pull amplifier the power supply is connected to the center-tap of the transformer and a tube is connected to both the upper and lower end of the center-tapped primary. This allows the tubes to conduct on alternate cycles of the input waveform. A push-pull stage can be biased class A, where current flows in both tubes for the entire input cycle but in opposite directions in the output transformer, so they sum in-phase in the secondary winding while the DC offset bias current cancels out, to prevent core saturation and allow use of smaller, ungapped cores), or class AB, where current flows alternately in both halves, but less than a full cycle in each, or class B, where current flows only half the time in each tube. Most designs are biased class AB for best efficiency and power output with minimal crossover distortion (but not necessarily best "tone").

    http://www.aikenamps.com/SingleEnded.htm
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    Last edited by Vassilis; 11-20-2007 at 01:19 AM.

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