CircuitClarity

Engine category

Semiconductors

Published tools in this category solve distinct design decisions. Each keeps its assumptions, limits, and next decision visible.

Standard approximation

Diode operating-point estimator

Estimate diode forward current, voltage, and loss from a source, series resistance, and stated ideal, constant-drop, or Shockley model.

Exact ideal relationship

Rectifier diode selector

Calculate rectifier diode conduction loss from forward current and entered forward voltage.

Exact ideal relationship

Zener shunt regulator designer

Calculate zener current and power for a resistor-fed shunt regulator at one supply and load corner.

Standard approximation

TVS diode screening

Estimate instantaneous TVS current and power from a resistive source and one entered clamp-voltage point.

Exact ideal relationship

LED resistor designer

Calculate the series resistor value and dissipation for a single LED at a target current.

Exact ideal relationship

Series LED string designer

Calculate the series resistor needed for a multi-LED string at a target current and check voltage headroom.

Standard approximation

BJT common-emitter gain estimator

Estimate ideal common-emitter midband voltage gain and small-signal parameters from bias current and collector resistance.

Exact ideal relationship

BJT emitter follower designer

Calculate the ideal DC emitter voltage of a BJT emitter follower from base voltage and base-emitter drop.

Standard approximation

MOSFET gate-drive planner

Calculate average gate current, ideal gate-drive power, and charge time from total gate charge and switching frequency.

Standard approximation

IGBT loss estimator

Combine IGBT conduction and switching loss from Vce(sat), duty cycle, per-cycle switching energy, and frequency.

Exact ideal relationship

JFET self-bias designer

Calculate JFET drain current from Idss, pinch-off voltage, and gate-source voltage using Shockley's square-law model.