Junction Field-Effect Transistors (Jfets)

Part 1: depletion region; introduction to the basic operation of JFETs; Vvr curves - Ids versus Vds for various values of Vgs and for small Vds; the JFET in the active region; JFET drain characteristics. Part 2: review of JFET in the active region; transfer curve - lecture and laboratory demonstrations. Part 3: laboratory demonstration - JFET transfer characteristics; part 4 - dynamic transfer conductance; review of JFET transfer curves; JFET common-source amplifier - part 1; laboratory demonstration - common-source amplifier; review of common-source amplifier, part 1; JFET common-source amplifier, part 2. Part 4: distortion in a JFET common-source amplifier; lecture and laboratory demonstration. Part 5: JFET small-signal equivalent circuit; review of distortion; JFET course follower; small-signal model; example; laboratory demonstration. Part 6: laboratory demonstration - source follower; review of JFET source follower; JFET constant current source; laboratory demonstration - JFET constant current source; JFET constant current source at high frequencies; JFET constant current source example; laboratory demonstration - current regulator diode used in a voltage regulator circuit. Part 7: review of JFET constant current source; bootstrapping circuits; laboratory demonstration - source follower/emitter follower with bootstrapping; review of bootstrapping circuits; JFET as an electronic switch. Part 8: JFET switch with improved linearity; JFET switch at high frequencies; laboratory demonstration - JFET switch; JFET used as a voltage-variable resistor; laboratory demonstration - JFET used as a voltage-variable resistor.