E6A01

In what application is gallium arsenide used as a semiconductor material in preference to germanium or silicon?

  1. At microwave frequencies

E6A02

What type of semiconductor material contains more free electrons than pure germanium or silicon crystals?

  1. N-type

E6A03

What are the majority charge carriers in P-type semiconductor material?

  1. Holes

E6A04

What is the name given to an impurity atom that adds holes to a semiconductor crystal structure?

  1. Acceptor impurity

E6A05

What is the alpha of a bipolar junction transistor?

  1. The change of collector current with respect to emitter current

E6A06

What is meant by the beta of a bipolar junction transistor?

  1. The change in collector current with respect to base current

E6A07

In Figure E6-1, what is the schematic symbol for a PNP transistor?

  1. 1

E6A08

What term indicates the frequency at which a transistor grounded base current gain has decreased to 0.7 of the gain obtainable at 1 kHz?

  1. Alpha cutoff frequency

E6A09

What is a depletion-mode FET?

  1. An FET that exhibits a current flow between source and drain when no gate voltage is applied

E6A10

In Figure E6-2, what is the schematic symbol for an N-channel dual-gate MOSFET?

  1. 4

E6A11

In Figure E6-2, what is the schematic symbol for a P-channel junction FET?

  1. 1

E6A12

Why do many MOSFET devices have built-in gate-protective Zener diodes?

  1. To reduce the chance of the gate insulation being punctured by static discharges or excessive voltages

E6A13

What do the initials CMOS stand for?

  1. Complementary metal-oxide semiconductor

E6A14

How does DC input impedance at the gate of a field-effect transistor compare with the DC input impedance of a bipolar transistor?

  1. An FET has high input impedance; a bipolar transistor has low input impedance

E6A15

What two elements widely used in semiconductor devices exhibit both metallic and nonmetallic characteristics?

  1. Silicon and germanium

E6A16

What type of semiconductor material contains fewer free electrons than pure germanium or silicon crystals?

  1. P-type

E6A17

What are the majority charge carriers in N-type semiconductor material?

  1. Free electrons

E6A18

What are the names of the three terminals of a field-effect transistor?

  1. Gate, drain, source

 

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