Semiconductor Devices Workbench

Interactive workspace initializes in your browser. Engineering method, assumptions, validation, and references are available below.

Engineering reference

Semiconductor Devices: theory, method, and sources

This electrical engineering workspace publishes 6 governing equations, 4 stated assumptions, 2 documented boundaries, and 2 sources so the numbers it returns can be checked rather than taken on trust.

Calculations run locallyCalculation & source methodology

How this tool works

Ten guided modules connect semiconductor equations to practical operating points, bias networks, switching losses, rectification, and thermal limits.

Every quantitative graph labels its measured quantity and unit, including volts, amperes, watts, seconds, ohms, and degrees Celsius.

All models run locally with bounded input ranges, fixed graph samples, and imported-state normalization.

Calculators and topics covered

electronics
semiconductors
diodes
BJT
MOSFET
rectifiers
thermal design
Shockley diode equation
load line
Zener regulator
LED resistor
bridge rectifier
BJT bias
MOSFET regions

Core equations

I = I_{s} \left(e^{\frac{V}{nV_{t}}} - 1\right)

I = \frac{V_{s} - V {}_{D}}{R}

R = \frac{V_{s} - V {}_{F}}{I}

I_{C} \approx \beta I_{B}

I_{D} \approx \frac{k \left(V_{GS} - V_{TH}\right)^{2}}{2}

T_{j} = T_{a} + P\theta _{ja}

Method and assumptions

Assumptions

Diode and transistor models are educational approximations.
BJT calculations use a fixed base-emitter drop and current gain.
MOSFET calculations use a square-law long-channel model or fixed RDS(on).
Thermal calculations are steady state.

Limitations and design boundaries

Not a substitute for datasheet curves, SPICE, SOA analysis, transient thermal impedance, avalanche testing, EMC review, or laboratory verification.
Reverse recovery, parasitic capacitance, breakdown, leakage variation, manufacturing spread, and switching transitions are simplified or omitted.

Sources and references

Primary sources are preferred for ratings, standards, manufacturer data, and externally defined constants.

Source policy

Sedra and Smith, Microelectronic CircuitsDiode, BJT, MOSFET, bias, and amplifier fundamentals.
Horowitz and Hill, The Art of ElectronicsPractical semiconductor circuits and component behavior.

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