Difference between revisions of "Test"
From Mech
Jump to navigationJump to search| Line 1: | Line 1: | ||
| ⚫ | |||
| ⚫ | |||
If we put two emitter followers together (npn transistor for positive |
If we put two emitter followers together (npn transistor for positive |
||
voltages; pnp transistor for negative voltages), we get a push-pull |
voltages; pnp transistor for negative voltages), we get a push-pull |
||
| Line 13: | Line 12: | ||
pnp transistor. |
pnp transistor. |
||
Beware that there is a |
Beware that there is a “dead band” when V<sub>in</sub> is between 0.7V |
||
and -0.7V, because the voltage has not pass the cutoff voltage for |
and -0.7V, because the voltage has not pass the cutoff voltage for |
||
either transistor. This is known as '''crossover distortion'''. |
either transistor. This is known as '''crossover distortion'''. |
||
~ |
|||
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 > 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. ~
