Difference between revisions of "Test"

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follower.
follower.


[[Image:transistor_push_pull_follower.gif]]



If <math>V_{in}</math> &gt; 0.7V, then the current is amplified by the
If <math>V_{in}</math> &gt; 0.7V, then the current is amplified by the

Revision as of 17:39, 18 August 2009

Push-Pull Follower

If we put two emitter followers together (npn transistor for positive voltages; pnp transistor for negative voltages), we get a push-pull follower.

Transistor push pull follower.gif

If > 0.7V, then the current is amplified by the npn transistor.

If < -0.7V, then the current is amplified by the pnp transistor.

Beware that there is a “dead band” when Vin is between 0.7V and -0.7V, because the voltage has not pass the cutoff voltage for either transistor. This is known as crossover distortion. ~