Piletid vastustega
The
biasing is arranged with the help of R1 and R2.Because of the output capacitor C, this voltage
is coupled to the load.Since the emitter is no longer at ac ground, the ac voltage across the
emitter is approximately equal to the input voltage at the base.The reason the circuit is called
an emitter follower is because the output voltage follows the input voltage.
3)
4)current,ac,feedback.5)analog, class A
6)
7)ADVANTAGES:The output impedance is significantly lower than the inpud
impedance.That is, the circuit is especially useful to decrease the output resistance of the
electronic device.Another benefit is, that almost no distortion of the signal occurs.That is why
the emitter follower is often used as an intermediate stage of a power amplifier for current
amplification.DISADVANTAGES:high noise and limited frequency range, over which the
stabilization is effective.Phase delay.DC stops.Additional area, volume, size, weight of
amplifiers.
8)
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