1. AC coupler follower
Do not base bias, Vin the negative half-cycle, can not be output.
After the correction circuit, Ve = 0.5Vcc;
2. with emitter degeneration common emitter amplifier
Q emitter is reversed, the amplifier is not complete, Vc require more than Ve
After the correction circuit:
The derivation process
3. The dual power supply AC-coupled emitter follower
An NPN transistor, since Vc is larger than Ve to work properly.
After the correction circuit
