BJT
Multistage Amplifiers
Cascaded CE stages, overall gain, loading effect.
BJT PNP Operation
Forward active PNP, hole injection, complementary to NPN.
Emitter Bias
Emitter resistor stabilization, design methodology.
Transistor Switching
Turn-on and turn-off times.
Ebers-Moll Model
Coupled diode equations.
Current Components
Emitter efficiency, base transport factor.
BJT Configurations
CE, CB, CC characteristics.
BJT Operation
Active mode, carrier injection, base width modulation.
Cascode Amplifier
CE-CB cascade, improved bandwidth, Miller effect reduction.
Power Amplifiers Class AB
Reduced crossover distortion, biasing for Class AB.
BJT NPN Operation
Forward active NPN, electron injection, base recombination.
BJT Current Relationships
Alpha, beta, relationship between IC IB IE, current gain.
BJT Operating Regions
Active, cutoff, saturation, inverse active identification.
BJT Input Output Characteristics
IC vs VCE, IB vs VBE curves, Early effect.
Fixed Bias Circuit
Single resistor biasing, Q-point calculation, stability analysis.
Collector Feedback Bias
Negative feedback biasing, improved stability over fixed bias.
BJT Bias Stability
Stability factors S(ICO) S(VBE) S(beta), thermal runaway.
Common Emitter Amplifier
CE voltage gain, input and output impedance, phase inversion.
Common Base Amplifier
CB current gain, high frequency advantage, low input impedance.
Common Collector Amplifier
Emitter follower, voltage gain approximately 1, impedance transformation.
BJT Small Signal Model
Hybrid pi model, transconductance gm, input resistance rpi.
H Parameter Analysis
h parameters hie hre hfe hoe, two port BJT model.
BJT Frequency Response
Miller effect, bandwidth, upper and lower cutoff frequencies.
Darlington Pair
Super beta configuration, high current gain, input impedance.
Differential Amplifier
Difference and common mode gain, CMRR, tail current source.
Power Amplifiers Class A
Class A operation, efficiency 25%, transformer coupled.
Power Amplifiers Class B
Push pull operation, crossover distortion, efficiency 78.5%.
BJT Structure and Construction
NPN and PNP layers, emitter-base-collector doping profiles.
Voltage Divider Bias
Most stable bias circuit, design procedure, Q-point.