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Suggest pagesPractical Electronics/Amplifiers/Common emitter
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< Practical Electronics | Amplifiers(Redirected from Common emitter)
This page may need to be [edit] Transistor - Common_Emitter_amplifier
QUALITATIVE CHARACTERISTICS
- Current Gain: ..... HIGH
- Voltage Gain: ..... HIGH
- Power Gain: ..... HIGH
- Input Impedance: ... AVERAGE
- Output Impedance:... AVERAGE
QUANTITATIVE CHARACTERISTICS Input Resistance(base): Zb=β×re' -> β: Current Gain (Ic/Ib), where 'Ic' is Colector DC current and 'Ib' is DC Base current; -> re': Base-Emitter dynamic resistor (Ut/Ie), where Ut is thermal voltage(≈25mV at 25°C) and 'Ie' is DC emitter current; Input Resistance(general): Zg= Zb || R1 || R2, where R1 and R2 are the same as the picture above.
