Electronics: MOSFET, JFET, BJT Bias and Amplifier Classes

What bias must be applied from Gate to Source to get Drain current to flow in a P-Channel Enhancement MOSFET?

Gate must be Negative relative to Source.

To reverse bias an N-Channel JFET, the Gate must be made more Positive or Negative than the source?

Negative

How many junctions are in a BJT?

Two

Oscillators and Radio Frequency Amplifiers operate in which class and conduct for less than 180 degrees on the output?

Class C

What determines the Class of operation in an Amplifier?

The amount of Forward Bias before the signal is applied.

Do the Common Base, Emitter, and Collector configurations have the same gain characteristics?

False

How much Drain current will flow in a Depletion MOSFET with no Bias applied?

Medium Drain current.

What type of bias is used to reduce Drain current?

Reverse

Which BJT Configuration has a 180 degree phase shift from input to output?

Common Emitter

Classes of operation are labeled with what?

LETTERS

What are the two bias requirements necessary to turn on a BJT?

Forward Bias the E/B and Reverse Bias the C/B

How much Drain current will flow in an Enhancement MOSFET with no Bias applied to the Gate and source?

None. It has a broken Channel.

If the arrow points out on the symbol, is it NPN or PNP?

NPN

What are the three configurations for an FET Amplifier?

Common: Source, Gate or Drain.

Single stage audio amplifiers must be operated in which Class to avoid output distortion?

Class A

What defines the differences between classes of operation as far as transistor conduction?

How much the transistor conducts on the output for 360 degrees in.

What lead contains the Arrow in a BJT Symbol?

The Emitter

What lead contains the Arrow in a JFET Symbol?

The Gate

What are the three leads of a JFET?

Source, Gate and Drain

How do the schematic symbols differ for Depletion and Enhancement MOSFETs?

Depletion has a solid channel and Enhancement has a broken channel.

What are the three configurations for a BJT Amplifier?

Common: Emitter, Base or Collector.

What are the three leads of a BJT?

Emitter, Base and Collector

If the arrow points toward the Channel, what material is the gate?

P Material

If three Common Emitter Amplifiers are connected in series, what would the phase relationship be from input to output?

180 degrees Out-of-Phase