Self-Biased CS MOSFET DC Analysis Calculator

Self-Biased CS MOSFET DC Analysis

Calculate the DC drain current \(I_{DQ}\) and drain-to-source voltage \(V_{DS}\) for a self-biased common source MOSFET amplifier in saturation mode.

* Please enter all voltages with their appropriate signs. Set \(V_{DD}=0\) if \(V_{DS}\) is not required.

Step 1: Enter Biasing Parameters

Enter with sign (e.g., 5 V or -5 V)

e.g., 2 V

e.g., 0 V

e.g., 1000 Ω (1 kΩ)

Enter 0 if \(V_{DS}\) is not required

e.g., 10000 Ω (10 kΩ)

e.g., 0.001 A/V²

Dimensionless (e.g., 10)

e.g., 1 V

MOSFET Saturation (Self-Biased CS): $$ I_D = \frac{1}{2}\, k’\frac{W}{L}\Bigl[(V_G – V_S) – V_{TH}\Bigr]^2 $$

Drain Voltage: $$ V_D = V_{+} – I_D\,(R_D + R_S) $$

Drain-to-Source Voltage: $$ V_{DS} = V_D – V_S $$

Drain-to-Gate Voltage: $$ V_{DG} = V_D – V_G $$