Answer to Question #292385 in Electrical Engineering for Saru

Question

The device parameters for an n-Channel JFET are: Maximum current iDSS = 10mA. Pinch off voltage, Vp = - 4V Calculate the drain current for (a) VGS = 0 (b) VGS - 1.0v (c) VGS = - 4V.

Answer 1

Drain current= I_DSS (1- Vgs/Vp)²

I_DSS = 10mA

Vp = - 4V

(a)-Drain current= 10mA (1- 0)²=10mA

(b)-Drain current= 10mA (1-1/4)²= 3.125mA

(c)-Drain current= 10mA (1-4/4)²= 0mA