86. A field-effect transistor amplifier provides excellent voltage gain with the added feature of a ________ input impedance.
(a) low
(b) medium
(c) high
(d) None of the above
87. The depletion MOSFET circuit has a ________ input impedance than a similar JFET configuration.
(a) much higher
(b) much lower
(c) lower
(d) higher
88. The ________ configuration has an input impedance, which is other than RG.
(a) common-source
(b) common-gate
(c) common-drain
(d) None of the above
89. rd changes from one operation region to another with ________ values typically occurring at ________ levels of VGS (closer to zero).
(a) lower, lower
(b) lower, higher
(c) higher, lower
(d) None of the above
90. A ________ configuration has a voltage gain less than 1.
(a) fixed-bias
(b) self-bias
(c) source-follower
(d) voltage-divider
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