ECE01 Quiz2 Finals

A JFET

• Is a voltage-controlled device   

• Is a current-controlled device   

• Has a low input resistance

• Has a very large voltage gain

A unipolar transistor uses

• Both free electrons and holes               

• Only free electrons       

• Only holes

• Either one or the other, but not both

The input impedance of a JFET

• Approaches zero

• Approaches one

• Approaches infinity

• Is impossible to predict

The gate controls

• The width of the channel

• The drain current

• The proportional pinchoff voltage

• All the choices

The gate-source diode of a JFET should be

• Forward-biased

• Reverse-biased

• Either forward- or reverse-biased

• None of the above

An E-MOSFET with its gate connected to its drain is an example of

• A three-terminal device

• An active load

• A passive load

• A switching device

An E-MOSFET that operates at cutoff or in the ohmic region is an example of

• A current source

• An active load

• A passive load

• A switching device

CMOS stands for

• Common MOS

• Active-load switching

• p-channel and n-channel devices

• Complementary MOS

VGS(on) is always

• Less than VGS(th)

• Equal to VDS(on)

• Greater than VGS(th)

• Negative

With active-load switching, the upper E-MOSFET is a

• Two-terminal device     

• Three-terminal device

• Switch

• Small resistance