Podcast
Questions and Answers
What is the primary function of a reverse-biased pn junction in a JFET?
What is the primary function of a reverse-biased pn junction in a JFET?
- To amplify the input signal
- To reduce the input impedance
- To increase the output voltage
- To control current in a channel (correct)
What is the difference between an n-channel and a p-channel JFET?
What is the difference between an n-channel and a p-channel JFET?
- The direction of current flow
- The structure of the device (correct)
- The number of terminals
- The type of material used in the construction
What are the three terminals of an n-channel JFET?
What are the three terminals of an n-channel JFET?
- Collector, base, and emitter
- Drain, gate, and collector
- Drain, base, and emitter
- Drain, gate, and source (correct)
What is the purpose of the p-type regions in an n-channel JFET?
What is the purpose of the p-type regions in an n-channel JFET?
What is the function of the gate lead in a JFET?
What is the function of the gate lead in a JFET?
What is the difference between a JFET and a BJT?
What is the difference between a JFET and a BJT?
What is IDSS in the context of JFETs?
What is IDSS in the context of JFETs?
What happens to a JFET when it reaches breakdown?
What happens to a JFET when it reaches breakdown?
What is the effect of increasing the magnitude of VGS to larger negative values on the drain current?
What is the effect of increasing the magnitude of VGS to larger negative values on the drain current?
What is the region of operation where the JFET produces a constant current?
What is the region of operation where the JFET produces a constant current?
What is the purpose of applying a reverse-bias voltage, VGG, from gate to source?
What is the purpose of applying a reverse-bias voltage, VGG, from gate to source?
What is the term for the point where the drain current becomes constant?
What is the term for the point where the drain current becomes constant?
What is the primary purpose of determining ID in a JFET amplifier?
What is the primary purpose of determining ID in a JFET amplifier?
What is the graphical approach used to find ID based on?
What is the graphical approach used to find ID based on?
Why are capacitors removed from the circuit in the DC analysis?
Why are capacitors removed from the circuit in the DC analysis?
What is the assumption made about the voltage source in the AC equivalent circuit?
What is the assumption made about the voltage source in the AC equivalent circuit?
What is the AC equivalent circuit based on?
What is the AC equivalent circuit based on?
What is the AC potential of the VDD terminal in the AC equivalent circuit?
What is the AC potential of the VDD terminal in the AC equivalent circuit?
What is the main purpose of RG in amplifier applications?
What is the main purpose of RG in amplifier applications?
What is the relationship between IS and ID in a JFET?
What is the relationship between IS and ID in a JFET?
What is the effect of the current through RS on the source of a p-channel JFET?
What is the effect of the current through RS on the source of a p-channel JFET?
How is the drain voltage with respect to ground determined in a JFET?
How is the drain voltage with respect to ground determined in a JFET?
What is the purpose of setting the Q-Point of a JFET?
What is the purpose of setting the Q-Point of a JFET?
What is the relationship between VG and VS in an n-channel JFET?
What is the relationship between VG and VS in an n-channel JFET?
What is the characteristic of the input resistance to a JFET?
What is the characteristic of the input resistance to a JFET?
What is the condition required for the expression of JFET voltage gain in Equation 9-1 to be applicable?
What is the condition required for the expression of JFET voltage gain in Equation 9-1 to be applicable?
What is the primary contributor to the voltage at the gate in the circuit shown in Figure 9-8(b)?
What is the primary contributor to the voltage at the gate in the circuit shown in Figure 9-8(b)?
What is the purpose of the ac voltage source in the circuit shown in Figure 9-8(b)?
What is the purpose of the ac voltage source in the circuit shown in Figure 9-8(b)?
What is the configuration of the amplifier being discussed in the context of Equation 9-1?
What is the configuration of the amplifier being discussed in the context of Equation 9-1?