Pn Junction with No Applied Fundamentals Of PN junction diode Forward Biased Condition Pn Junction Under Reverse Biased Condition Diode Configuration Zener Diode Zener diode As Voltage regulator Clipper Circuit Clamper Circuit Voltage Doubler

Half Wave Rectifier Full Wave Rectifier Full Wave Bridge Rectifier

Configuration Of BJT BJT Biasing Thermal Stability AC Analysis Of BJT

Common emitter amplifier Common Emitter Amplifier Without RE Common emitter amplifier with RE and CE Common Collector and Common Emitter Amplifier Frequency Response of Common Emitter Amplifier Amplifier Modelling Multistage Amplifier

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DC analysis:

All the capacitor open circuited.

AC analysis:

Voltage gain:

Av = Vo/Vin

= -g_m(Rc||R_L||r_o)

Current gain:

Av = -g_mr_𝝿 = -𝜷

Input resistance:

R_iB = r_𝝿

Ri =R_TH||Ri_B

RiB is input resistance looking into base of BJT

Ri is input resistance of amplifier

Ris is input resistance looking from source

Output resistance: Ro = Rc||Ri_B

Comparison Table of CE Amplifier:

Parameters	Common-Emmiter(CE) Amplifier	Common Base (CB) Amplifier	Common-Collector (CC) Amplifier
Input Resistance	Moderate $\boldsymbol\beta{\boldsymbol r}_{\mathbf e}$	Low ${\boldsymbol r}_{\mathbf e}$	Higher $\boldsymbol\beta{\boldsymbol r}_{\mathbf e}$
Output Resistance	High ${\boldsymbol R}_{\mathbf c}$	High ${\boldsymbol R}_{\mathbf c}$	Low ${\boldsymbol r}_{\mathbf e}$
Voltage Gain	High $\frac{{\mathbf r}_{\mathbf L}}{{\mathbf r}_{\mathbf e}}$	High $\frac{{\mathbf r}_{\mathbf L}}{{\mathbf r}_{\mathbf e}}$	About 1
Current Gain	High $\boldsymbol\beta$	Low,About 1	High (1+ $\boldsymbol\beta$ )
Power Gain	High	Moderate	Low
Phase shift	180^o	0^o	0^o

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