3-54
The MOSFET is an FET that has even higher input impedances than the JFET because the gate of
the MOSFET is completely insulated from the rest of the device. The MOSFET operates in either the
depletion mode or the forward-bias enhancement mode and can be either N-channel or P-channel. The
induced-channel and the dual-gate MOSFETs are variations of the basic MOSFET.
ANSWERS TO QUESTIONS Q1. THROUGH Q44.
A1. The minority carriers.
A2. Zener effect and avalanche effect.
A3. Zener effect.
A4. The doping level of an avalanche effect diode is lower.
A5. An external current-limiting resistor.
A6. Because Zener diodes are operated in the reverse bias mode.
A7. The amount of doping.
A8. Negative resistance.
A9. The tunnel diode has a very narrow depletion region.
A10. Minimum.
A11. Variable capacitance.
A12. The depletion region decreases.
A13. Capacitance decreases.
A14. The SCR is primarily used for switching power on or off.
A15. A gate signal.
