2. Electronics and Devices

Bjt Transistors — Quiz

Test your understanding of bjt transistors with 5 practice questions.

Practice Questions

Question 1

Given a BJT emitter-coupled differential pair with a total tail current of 2 mA at 300 K (V_T≈26 mV), what is its small-signal differential transconductance G_m (in S)?

Question 2

For the differential amplifier in question 1 with collector resistors R_C=5 kΩ, what is the small-signal differential voltage gain A_v?

Question 3

What is the primary effect of including an emitter-degeneration resistor R_E in a BJT amplifier stage?

Question 4

Which advantage does adding a cascode transistor to a common-emitter amplifier provide?

Question 5

In a simple BJT current mirror using two matched transistors and a reference resistor R=7 kΩ in the emitter–base loop, with V_BE≈0.7 V, what is the approximate output current I_out?