40 TOP FIELD EFFECT TRANSISTORS (FET) Online Test – Questions and Answers 1. The overall input capacitance of a dual-gate D-MOSFET is lower because the devices are usually connected: in series in parallel with separate insulation with separate inputs 2. Which component is considered to be an “OFF” device? JFET E-MOSFET transistor D-MOSFET 3. Which type of JFET bias requires a negative supply voltage? voltage divider source gate feedback 4. The common-source JFET amplifier has: a high input impedance and a voltage gain less than 1 a high input impedance and a voltage gain less than 1 a very high input impedance and a relatively low voltage gain no voltage gain 5. The type of bias most often used with E-MOSFET circuits is: zero biasing constant current voltage-divider drain-feedback 6. With a JFET, a ratio of output current change against an input voltage change is called: siemens transconductance resistivity gain 7. How will a D-MOSFET input impedance change with signal frequency? As frequency decreases input impedance is constant As frequency increases input impedance increases As frequency increases input impedance is constant As frequency decreases input impedance increases 8. When the JFET is no longer able to control the current, this point is called the: depletion region saturation point breakdown region pinch-off region 9. D-MOSFETs are sometimes used in series to construct a cascode high-frequency amplifier to overcome the loss of: capacitive reactance high input impedance inductive reactance low output impedance 10. When is a vertical channel E-MOSFET used? for high currents for high frequencies for high resistances for high voltages Loading … Question 1 of 10
