【单选题】The JFET is a ( ).
A.
voltage-controlled device
B.
current-controlled device
C.
frequency-controlled device
D.
power-controlled device
【单选题】The pinch-off voltage of a JFET is
D.
depending on the operating condition
【判断题】在治理通货膨胀时,“供给政策”的核心措施是提高税率。
【单选题】It is important to remember that when the JFET is used as a voltage variable resistor, which is one of its practical applications, the voltage is ________ and is ________ . ( )
A.
very much greater than; very much greater than
B.
very much less than; very much greater than
C.
very much greater than; very much less than
D.
very much less than; very much less than
【单选题】The ( ) terminal of the JFET is the equivalent of the base terminal of a BJT.
【单选题】The maximum current in a JFET is defined as IDSS and occurs when VGS is equal to ( ).
C.
a small positive voltage
D.
a voltage greater than the pinch-off voltage
【单选题】It is important to remember that when the JFET is used as a voltage variable resistor, which is one of its practical applications, the voltage VDS is ________ VDS(max) and | VGS | is ________ |VP|.
A.
very much greater than; very much greater than
B.
very much less than; very much greater than
C.
very much greater than; very much less than
D.
very much less than; very much less than