A-002-04: Field effect transistor (FET), JFET, MOSFET
A-002-04-01:
What is an enhancement-mode FET?
An FET without a channel; no current occurs with zero gate voltage
An FET with a channel that blocks voltage through the gate
An FET with a channel that allows current when the gate voltage is zero
An FET without a channel to hinder current through the gate
A-002-04-02:
What is a depletion-mode FET?
An FET that has a channel with no gate voltage applied; a current flows with zero gate voltage
An FET without a channel; no current flows with zero gate voltage
An FET without a channel to hinder current through the gate
An FET that has a channel that blocks current when the gate voltage is zero
A-002-04-03:
Why do many MOSFET devices have built-in gate protective Zener diodes?
The gate-protective Zener diode prevents the gate insulation from being punctured by small static charges or excessive voltages
The gate-protective Zener diode keeps the gate voltage within specifications to prevent the device from overheating
The gate-protective Zener diode protects the substrate from excessive voltages
The gate-protective Zener diode provides a voltage reference to provide the correct amount of reverse-bias gate voltage
A-002-04-04:
Why are special precautions necessary in handling FET and CMOS devices?
They are susceptible to damage from static charges
They are light-sensitive
They have micro-welded semiconductor junctions that are susceptible to breakage
They have fragile leads that may break off
A-002-04-05:
How does the input impedance of a field-effect transistor (FET) compare with that of a bipolar transistor?
An FET has high input impedance; a bipolar transistor has low input impedance
One cannot compare input impedance without knowing supply voltage
An FET has low input impedance; a bipolar transistor has high input impedance
The input impedance of FETs and bipolar transistors is the same
A-002-04-06:
What are the three terminals of a junction field-effect transistor (JFET)?
Gate, drain, source
Emitter, base 1, base 2
Emitter, base, collector
Gate 1, gate 2, drain
A-002-04-07:
What are the two basic types of junction field-effect transistors (JFET)?
N-channel and P-channel
High power and low power
MOSFET and GaAsFET
Silicon and germanium
A-002-04-08:
Electron conduction in an n-channel depletion type MOSFET is associated with:
n-channel depletion
p-channel depletion
p-channel enhancement
q-channel enhancement
A-002-04-09:
Electron conduction in an n-channel enhancement MOSFET is associated with:
n-channel enhancement
q-channel depletion
p-channel enhancement
p-channel depletion
A-002-04-10:
Hole conduction in a p-channel depletion type MOSFET is associated with:
p-channel depletion
n-channel enhancement
q-channel depletion
n-channel depletion
A-002-04-11:
Hole conduction in a p-channel enhancement type MOSFET is associated with:
p-channel enhancement
n-channel depletion
n-channel enhancement
q-channel enhancement
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