SPICE netlist template examples for diode, BJT amplifier, and MOSFET amplifier simulations.
Typical pitfalls and troubleshooting checklist.
Chapter 7: FET Biasing
PPT Content: Fixed-bias, self-bias, voltage-divider bias for JFETs and MOSFETs.
Graphical Solution: Using the transfer curve and bias line to find (I_DQ) and (V_GSQ).
Key topics and what to include per topic
Semiconductor physics: energy bands, intrinsic/extrinsic material, carrier concentration, drift/diffusion — include simple band diagrams and equations for ni, conductivity.
PN junction: built-in potential, depletion region, I-V characteristic, temperature effects — show diode equation and graph.
BJTs: device structure, biasing methods (fixed bias, voltage divider), Ebers–Moll basics, active/cutoff/saturation regions — include DC bias design example with step-by-step calculations.
BJT small-signal model: hybrid-pi/common-emitter small-signal model, r_pi, gm, ro — derive voltage gain, input/output impedance for common configurations.
MOSFETs: device types, V-I equations, thresholds, regions of operation, biasing — show transfer/output characteristics and basic bias design.
Frequency response: low/high cutoff derivations using time-constant method, poles/zeros, bandwidth calculations, example Bode plot.
Feedback and stability: types of feedback, effect on gain, input/output impedances, basic stability criteria, phase margin concept (no heavy control theory).
SPICE netlist template examples for diode, BJT amplifier, and MOSFET amplifier simulations.
Typical pitfalls and troubleshooting checklist.
Chapter 7: FET Biasing
PPT Content: Fixed-bias, self-bias, voltage-divider bias for JFETs and MOSFETs.
Graphical Solution: Using the transfer curve and bias line to find (I_DQ) and (V_GSQ).
Key topics and what to include per topic
Semiconductor physics: energy bands, intrinsic/extrinsic material, carrier concentration, drift/diffusion — include simple band diagrams and equations for ni, conductivity.
PN junction: built-in potential, depletion region, I-V characteristic, temperature effects — show diode equation and graph.
BJTs: device structure, biasing methods (fixed bias, voltage divider), Ebers–Moll basics, active/cutoff/saturation regions — include DC bias design example with step-by-step calculations.
BJT small-signal model: hybrid-pi/common-emitter small-signal model, r_pi, gm, ro — derive voltage gain, input/output impedance for common configurations.
MOSFETs: device types, V-I equations, thresholds, regions of operation, biasing — show transfer/output characteristics and basic bias design.
Frequency response: low/high cutoff derivations using time-constant method, poles/zeros, bandwidth calculations, example Bode plot.
Feedback and stability: types of feedback, effect on gain, input/output impedances, basic stability criteria, phase margin concept (no heavy control theory).