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 [math]\displaystyle{ R_D }[/math] is not know. If we want currents up to 5 mA using a 10 Volt power supply then [math]\displaystyle{ R_D }[/math] should be 2 k[math]\displaystyle{ \Omega }[/math]
| Parameter | Value |
| [math]\displaystyle{ I_{DSS} }[/math] | 2 - 20 mA |
| [math]\displaystyle{ V_{GS(off)} }[/math] | -8 Volts |
| [math]\displaystyle{ P_{max} }[/math] | 350 mW |
| [math]\displaystyle{ R_G }[/math] | 3.3 M[math]\displaystyle{ \Omega }[/math] |
| [math]\displaystyle{ R_D }[/math] | 1k \Omega |
| [math]\displaystyle{ y_{fs} }[/math] | 1600-7500 [math]\displaystyle{ \mu }[/math]mhos |
| [math]\displaystyle{ y_{is} }[/math] | 800 [math]\displaystyle{ \mu }[/math]mhos |
| [math]\displaystyle{ y_{os} }[/math] | 200 [math]\displaystyle{ \mu }[/math]mhos |
2.)Construct the JFET circuit below.
3.)Plot measurements of [math]\displaystyle{ I_D }[/math] -vs- [math]\displaystyle{ V_{DS} }[/math] by varying [math]\displaystyle{ V_{dd} }[/math] for [math]\displaystyle{ \left | V_{GS}\right | }[/math] = 0, 0.5, 1.0, 1.5 V. (40 pnts)
4.)Plot[math]\displaystyle{ I_D }[/math] -vs- [math]\displaystyle{ V_{GS} }[/math] (30 pnts)
5.)Calculate [math]\displaystyle{ y_{fs} }[/math] for your JFET (20 pnts)
Question
- Does [math]\displaystyle{ y_{fs} }[/math] depend on[math]\displaystyle{ I_D }[/math]? (10 pnts)