Electronics:Complete course on Electronic Devices & circuits

Explore intrinsic semiconductors, their conduction by electrons and holes, intrinsic carrier concentration, and the Fermi level between the valence and conduction bands.

Learn how extrinsic semiconductors are created by doping intrinsic semiconductors with donor or acceptor impurities. See how n-type and p-type materials differ in charge carriers, conduction, and Fermi level.

Explore how a resistor, a passive electrical component, opposes current and follows ohm's law. Understand v–i characteristics and key parameters—temperature coefficient, frequency response, tolerance, and power dissipation—plus a quiz.

Explore the types of resistors, including fixed and variable types like carbon film, metal oxide film, wire wound, potentiometer, and LDR, and their advantages, disadvantages, and applications.

Learn how to decode resistor color codes using four, five, and six band schemes to calculate resistance, tolerance, and reliability, with practical examples and a final quiz.

Explore how a capacitor, a passive component, stores energy between two plates separated by a dielectric, and learn its construction, capacitance, charging and discharging behavior, and common types.

Explore the diverse types of capacitors, including polarized and nonpolarized, fixed and variable, with applications in DC circuits, audio, high-frequency signals, and power supplies.

Explore capacitor specifications, including nominal capacitance, working voltage, tolerance, leakage current, temperature coefficient, polarization, and equivalent series resistance, with data sheets from manufacturers guiding selection.

Learn to read capacitor values across tantalum, aluminium, ceramic, and smd types using microfarads, nanofarads, and picofarads. Decode voltage, polarity, and three-digit codes, including class 1–3 ceramic behavior.

Explore how inductors, as passive components, oppose changes in current and store energy in magnetic fields, covering self and mutual inductance, coil types, and practical applications.

Explain the operation of inductors, mutual inductance and coupling, including dot convention, series and parallel configurations (aiding and opposition), with example problems and a quiz.

Explore fixed and variable inductors, including air, iron, and ferrite cores, with applications from RF chokes to supply filters. Learn how slug-tuned and tap inductors adjust inductance for tuning.

Learn the key specifications of inductors, including inductance, dc resistance, tolerance, self resonant frequency, saturation current, and q factor, and how these affect selection.

Learn to read and calculate inductor values using EIA and military color codes, interpret bands, tolerances, and examples of 2- and 5-band codes in microhenry.

Learn the p-n junction diode, its anode, cathode, and uni-directional current flow. Explore forward bias conduction, depletion region, and barrier potential.

Explore energy band diagrams for n-type and p-type semiconductors, including conduction and valence bands, Fermi level positions, depletion region, and the p-n junction.

Explore forward biasing of a pn junction diode, the narrowing depletion region, and the forward V characteristics curve with a series current-limiting resistor.

Learn reverse biasing of the pn junction diode, understand biasing, plot the reverse characteristics, and identify reverse saturation current and breakdown voltage in the diode.

Explain current components in a p-n junction diode under forward bias, where diffusion of holes and electrons reduces the depletion region and minority and majority currents form the total current.

Derive the p-n junction diode current equation under forward bias, linking depletion edge concentrations to the exponential current model. Include reverse saturation current, threshold voltage, temperature effects, and problems.

Explore static and dynamic forward and reverse resistance of a pn junction diode, with definitions, formulas, practical problems, and a concluding quiz.

Explore the temperature dependence of pn junction diodes, showing how reverse saturation current rises with temperature and the forward voltage shifts to keep current constant.

Learn about the transition capacitance of a p-n junction diode under reverse bias, derive ct = epsilon A / W, and see how the widening depletion region lowers capacitance.

Derive diffusion capacitance for a forward-biased injection diode, showing how injected charge varies with forward voltage and ties to the diffusion current and carrier lifetime.

Explore diode equivalent circuits: practical, ideal, and piecewise linear models. Learn forward and reverse bias behavior, including V_gamma (cut-in voltage), forward dynamic resistance R_F, and open-circuit reverse bias.

Examine depletion region expansion under reverse bias in a pn junction diode, and compare avalanche and Zener breakdown mechanisms, including breakdown voltage, carrier multiplication, and temperature effects.

Study how temperature raises avalanche breakdown voltage in lightly doped junctions. See how temperature lowers Zener breakdown voltage in heavily doped diodes.

Explore the Zener diode, a reverse-biased, voltage-regulating rectifier. Learn forward-bias behavior, breakdown voltage range (3–200 V), and the role of a current-limiting resistor.

Draw the VA characteristics of the Zener diode under forward and reverse bias, noting knee behavior and current limiting in the circuit.

Explore the key specifications of the zener diode, including zener voltage, current, power rating, zener resistance, tolerance, temperature stability, junction temperature, and package, highlighting its reverse bias mode voltage regulation.

Learn how to draw the equivalent circuits for the Zener diode, including the ideal and practical models, breakdown behavior, constant voltage region, and dynamic resistance.

Explore how temperature affects Zener diode voltage, define the temperature coefficient DC as percentage per degree Celsius, derive the voltage change expression with temperature, and examine sign behavior with examples.

Explore avalanche and Zener breakdown mechanisms in the Zener diode and how heavy doping sets its reverse-bias breakdown voltage. See how Zener diodes protect circuits from overvoltage in practical applications.

Explore the Zener diode's advantages and disadvantages, its applications as voltage reference and regulator, and its differences from the junction diode in biasing, breakdown, and resistance.

Explore how zener diodes serve as a voltage regulator, waveform clipper, and voltage shifter, utilizing breakdown in reverse bias to stabilize, clip, and shift outputs.

The Zener diode acts as a voltage regulator by maintaining a constant output voltage across the load despite input or load variations, using a series resistor and Zener breakdown.

Explore how rectifiers convert AC to pulsating DC using a PN junction diode, enabling half-wave and full-wave rectification with a step-down transformer and turns ratio.

Explore the classifications and key characteristics of rectifier circuits, including single and three phase types, uncontrolled and controlled varieties, center tap and bridge configurations, ripple, regulation, and PIV.

Discover the half-wave rectifier, a single-diode circuit that converts the positive half cycle of an input into pulsating dc. Review its circuit diagram, operation, and its advantages and disadvantages.

Explore the half wave rectifier's key characteristics, including average dc load current, average dc load voltage, dc power output, ac input power, efficiency, peak inverse voltage, and ripple factor.

Explore how a center-tap full-wave rectifier uses two diodes and a center-tap transformer to convert all ac cycles into a smoother, higher DC output and discuss advantages and drawbacks.

Explore the key characteristics of a full wave rectifier, including idc, vdc, imf, pdc, pac, eta, piv, tu, voltage regulation, and ripple gamma, with practical calculation examples.

Explore how a four-diode bridge rectifier converts AC to full-wave DC across a load. Note advantages like low ripple and high efficiency, while two diodes cause a 1.4 V drop.

Explore the key characteristics of a bridge rectifier—dc load current and voltage, dc power, ac input, rectifier efficiency, peak inverse voltage, transformer utilization factor, and ripple factor—with an example.

Compare center-tap and bridge rectifiers, explaining center-tap transformers with dual diodes and four-diode bridge configurations. Discuss advantages, drawbacks, and performance metrics like transformer utilization factor and peak inverse voltage.

Compare half-wave, full-wave, and bridge rectifiers, explaining how AC converts to pulsating DC using a p-n junction diode, and analyze efficiency, ripple, and transformer utilization.

Explore how filters reduce ripple in rectified output to yield a steady dc, using capacitor input and inductor (choke) input filter concepts and their block diagrams.

Explore capacitor input filters for half way rectifiers, featuring a smoothing capacitor that charges to the peak minus diode drop and discharges through the load to reduce ripple.

Analyze the full-wave rectifier with a capacitor input filter, showing how the capacitor charges during both half cycles and discharges to reduce ripple for a smoother rectified output.

Explore how a bridge rectifier with a capacitor input filter converts AC to unidirectional DC, using four diodes and a large capacitor to minimize ripple at the load.

Derive and analyze the capacitor input filter in a full-wave rectifier, deriving ripple factor, ripple voltage, and DC output voltage, with triangular ripple behavior and example problems.

Learn how surge current is generated in a capacitor input filter with a bridge rectifier. Discover how to limit it with a surge resistor and discuss advantages, disadvantages, and applications.

Learn how a series inductor filter blocks ac, stores energy, and smooths rectified dc, reducing ripple and enabling a regulated output.

Explore the l-section filter, combining a series inductor and parallel capacitor to reduce ripple in rectifier outputs. Learn its operation, ripple factor derivation, and design with a bleeder resistor.

Explain the role of bleeder resistance in the LS filter to ensure minimum load current, prevent back emf, and stabilize DC, while outlining its advantages, disadvantages, and typical applications.

Explore multiple L-section LC filters for rectified dc, featuring a block diagram, bleeder resistor, and smooth dc output. Derive ripple factor expressions and demonstrate with a numerical example.

Compare capacitor input and LC filters, detailing how the capacitor-first vs inductor-first topology affects current limiting, back emf, voltage regulation, load response, ripple, and DC output in rectifier circuits.

Explore the CLC filter, a pi-shaped capacitor–inductor network that filters ripple, compares to the LC filter, and covers its working principle, advantages, disadvantages, and applications in power electronics.

Derive the ripple factor for the clc filter from a full-rectified output, deriving peak-to-peak and rms ripple expressions. Explain the multiple pi section filter and compare filter types.