TF EIMLab17 Writeup

The JFET (Junction Field Effect Transistor n-channel)

File:JFET MPF102 DataSheet.pdf

1.) Complete the table below for the JFET.

Only $R_D$ is not know. If we want currents up to 5 mA using a 10 Volt power supply then $R_D$ should be 2 k$\Omega$

Parameter	Value
$I_{DSS}$	2 - 20 mA
$V_{GS(off)}$	-8 Volts
$P_{max}$	350 mW
$R_G$	3.3 M$\Omega$
$R_D$	1k \Omega
$y_{fs}$	1600-7500 $\mu$mhos
$y_{is}$	800 $\mu$mhos
$y_{os}$	200 $\mu$mhos

2.)Construct the JFET circuit below.

3.)Plot measurements of $I_D$ -vs- $V_{DS}$ by varying $V_{dd}$ for $\left | V_{GS}\right |$ = 0, 0.5, 1.0, 1.5 V. (40 pnts)

4.)Plot$I_D$ -vs- $V_{GS}$ (30 pnts)

5.)Calculate $y_{fs}$ for your JFET (20 pnts)

Question

1. Does $y_{fs}$ depend on$I_D$? (10 pnts)

Forest_Electronic_Instrumentation_and_Measurement