Assignment
Answer /discuss the following 5 questions. Your answers should be 2-3 sentences long with detailed explanations. Also solve the following 4 problems and include detailed formulations, calculations and explanations.
Questions:
1) Is this a correct statement: "The JFET operates with a forward-biased pn junction"?
2) Explain the basic operation of an n-channel JFET.
3) Explain the regions of operations in a JFET.
4) How do you compare the "Pinch-off voltage" and "Cutoff Voltage".
5) How the IDSS is defined? And what does it stand for?
Problems:
1) Show how to connect bias voltages between the gate and source of the JFETs (a) n-channel and (b) p-channel).
2) A certain JFET datasheet gives VGS(off) = -8 V and IDSS = 10 mA. When VGS = 0, what is ID for values of VDS above pinch off? VDD = 15 V.
3) IDSS = 20 mA and VGS(off) = - 6 V for a particular JFET.
(a) What is ID when VGS = 0 V?
(b) What is ID when VGS = VGS(off)?
(c) If VGS is increased from - 4 V to - 1 V, does ID increase or decrease?
4) For each circuit below, determine VDS and VGS.
