The formula used to calculate the approximate ac resistance of the base-emitter

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Electronics ‣ Transistors and Applications Comments

Question
The formula used to calculate the approximate ac resistance of the base-emitter diode (r_e) is
Options
A.
B. r_e ≈ 25 mV � I_C
C.
D.

Correct Answer

Transistors and Applications problems

Search Results

1. The primary function of the bias circuit is to
Options
A. hold the circuit stable at V_CC
B. hold the circuit stable at v_in
C. ensure proper gain is achieved
D. hold the circuit stable at the designed Q-point

2. In a class B push-pull amplifier, the transistors are biased slightly above cutoff to avoid
Options
A. crossover distortion
B. unusually high efficiency
C. negative feedback
D. a low input impedance

3. The depletion-mode MOSFET
Options
A. can operate with only positive gate voltages
B. can operate with only negative gate voltages
C. cannot operate in the ohmic region
D. can operate with positive as well as negative gate voltages

6. Which of the following conditions are needed to properly bias an npn transistor amplifier?
Options
A. Forward bias the base/emitter junction and reverse bias the base/collector junction.
B. Forward bias the collector/base junction and reverse bias the emitter/base junction.
C. Apply a positive voltage on the n-type material and a negative voltage on the p-type material.
D. Apply a large voltage on the base.

Comments

More in Electronics: