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3-71. The MOSFET is normally constructed so
that it operates in either the depletion
mode or the enhancement mode. The
depletion mode MOSFET (a) uses what
type of bias and (b) has what type of
doped channel to cause a depletion of
current carriers in the channel?
1. (a) Reverse
(b) lightly
2. (a) Forward
(b) lightly
3. (a) Reverse
(b) heavily
4. (a) Forward
(b) heavily
3-72. The enhancement mode MOSFET (a) uses
what type of bias and (b) has what type of
doped channel to enhance the current
carriers in the channel?
1. (a) Reverse
(b) lightly
2. (a) Forward
(b) lightly
3. (a) Reverse
(b) heavily
4. (a) Forward
(b) heavily
Figure 3H.
A MOSFET schematic symbol.
IN ANSWERING QUESTION 3-73, REFER TO
FIGURE 3-H.
3-73. Which MOSFET element is identified by
the arrow in the schematic symbol shown
in figure 3-H?
1. Substrate
2. Source
3. Drain
4. Gate
3-74. What type metal is used in the
construction of a MOSFET?
1. Oxide
2. Copper
3. Silver
4. Aluminum
3-75. What is the purpose of the shorting spring
in a MOSFET?
1. To shunt the substrate to either the
source or gate during operation
2. To protect the device from static
electricity during replacement
3. To shunt the gates of a dual-gate
MOSFET to make it operate like a
single-gate MOSFET
4. To change the gain characteristics of
the MOSFET
