Electric Circuits
A note from the author
The majority of the circuits presented are elementary but the apparent simplicity is not treated superficially. The interested reader must be versed in algebra and basic electric circuits at least. The SPICE simulations are done using PSPICE the demo version 9.1. If you try them and get different results, then most probably and human error excluded, the macro-models and device models in your case are different.
NONLINEAR & MISCELLANEOUS ELECTRONICS
Astable Multivibrator - a BJT pair transient analysis.
Boost converter - a first principles approach on the output stage.
Relaxation oscillator and ramp generator – steady-state analysis.
Schmitt-Trigger with arbitrary voltage reference.
Linear PSU – BJTs with foldback limit.
Op-amp Gyrator – inductance emulator.
VBE Voltage Reference - Ebers-Moll derivation.
FILTERS & NETWORKS
ADSL POTS splitter analysis - High order passive filter implementations.
Cascaded resistance ladders of constant transfer ratio.
The Lattice network and echo-cancellation in a twisted pair transmission line.
Second order LC – LPF double loaded.
Parallel tuned RLC circuit - impedances and transfer function analysis.
BandPass RC - simple first order RC bandpass filter.
Pre-filtering for sampled system.
Square wave through low pass RC – output voltage range calculation.
Second Order RC Low-Pass-Filter - unbuffered cascaded sections with load.
AMPLIFIERS
Cascode BJT Amplifier - Miller Effect, DC analysis and midband gain.
Common Emitter BJT amplifier - Optimum DC, midband and high frequency analysis.
Class AB Amplifier - Resistive, Diode and VBE Multiplier Biasing Schemes.
Difference BJT Amplifier - basic and buffered amplifier study.
TRANSFORMERS
Auto-transformer analysis based on the transformer model presented below.
Common mode versus differential mode inductance filters.
The leaky transformer as a circuit element for small signals.