MESFET Cutoff Frequency Calculator

This page provides a calculator for determining the MESFET cutoff frequency. It also details the cutoff frequency formula used by the MESFET calculator.

EXAMPLE:

INPUTS:

• gm (m℧) = 50
• Cgs (pF) = 0.60
• Rd = 450 Ω
• Rs = 2.5 Ω
• Rg = 3 Ω
• Ri = 2.5 Ω

OUTPUTS:

• Cutoff frequency (Fco) = 13.26 GHz
• Max. operating frequency (Fmax) = 49.73 GHz

MESFET Cutoff Frequency Formula or Equation

The following formula or equation is used for calculating the MESFET cutoff frequency:

Where:

• fco = cutoff frequency
• gm = transconductance
• Cgs = gate-source capacitance

MESFET Maximum Operating Frequency Formula

The following formula is used for calculating the maximum operating frequency:

Where:

• fmax = maximum operating frequency
• Rd = Drain resistance
• Rs = Source Resistance
• Rg = Gate metallization resistance
• Ri = Input resistance