Self-Biased Common Drain MOSFET DC Analysis Calculator

Self-Biased Common Drain MOSFET DC Analysis

This calculator computes the DC drain current $I_{D Q}$ and the drain-to-source voltage $V_{D S}$ for a self-biased common drain (source follower) MOSFET amplifier.

* Please enter all voltages with their appropriate signs. Set $V_{D D} = 0$ if $V_{D S}$ (and $V_{D G}$ ) is not required.

Step 1: Enter Biasing Parameters

Supply Voltage,

V_{D D}

(V)

e.g., 5 V (or 0 if not required)

Gate Voltage,

V_{G}

(V)

e.g., 2 V

Source Voltage,

V_{S}

(V)

e.g., 0 V

Source Resistor,

R_{S}

(Ω)

e.g., 1000 Ω (1 kΩ)

Drain Supply Voltage,

V_{+}

(V)

e.g., 5 V (or 0 if not required)

Process Parameter,

k^{'}

(A/V²)

e.g., 0.001 A/V²

W / L

Ratio

Dimensionless (e.g., 10)

Threshold Voltage,

V_{T H}

(V)

e.g., 1 V

Step 1: Enter Biasing Parameters

Calculated DC Operating Point