Exam 32: Field Effect Transistors

For a common-gate JFET amplifier, the input is applied to the

The key difference between JFETs and MOSFETs is that the MOSFET has

Gate bias is seldom used with JFETs because the characteristic of the individual JFETs used in mass production may vary over a wide range.

The ______________ regions in a JFET are embedded on each side of the channel to help control the amount of current flow in the channel.

Which semiconductor device is frequently used as a small signal amplifier and frequency mixer?

The biggest disadvantage of the ______________-gate amplifier is its low value of input impedance.

What is the change in drain current divided by the change in gate-source voltage for a fixed value of V_DS?

Whatever method is used to bias a JFET, the gate-source junction is forward-biased.

A ______________ device depends on only one type of charge carrier, either electrons or holes.

Dual gate JFETs are most commonly used in frequency mixers, circuits that are frequently encountered in communications electronics.

The current gain of a JFET amplifier is

The FET is a bipolar device.

The field effect transistor is a three-terminal device similar to the bipolar junction transistor.

Because JFETs are much smaller than bipolar transistors, JFETs are more suitable for use in integrated circuits.

An advantage of a MOSFET over a JFET is it

Which semiconductor device is normally on?

Field effect transistors are current-controlled devices.

Which of the following is not a JFET amplifier configuration?

JFETs are often referred to as normally ______________ devices.

Which JFET amplifier has the disadvantage of very low input impedance?