Difference between revisions of "Test"
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voltages; pnp transistor for negative voltages), we get a push-pull |
voltages; pnp transistor for negative voltages), we get a push-pull |
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follower. |
follower. |
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Revision as of 16:39, 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.
If Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle V_{in}} > 0.7V, then the current is amplified by the npn transistor.
If Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle V_{in}} < -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. ~
