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question : AB amplifier

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zhi_yi

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in class AB amplifier, it said that while the circuit is in cut off, the voltage between C and E is 1/2 Vcc, why? please tell me how the current flow to the pin E, because there is a capasitor that block the dc current to flow to the E, if the current can't flow there, why there is voltage present?

thank you :)
 

You have two transistors. The idle current flows from +Vcc through both transistors, to ground, not through the speaker.
The voltage is generally maintained at Vcc/2 by a DC feedback loop.
 

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