Analog Electronics MCQ Questions & Answers | ECE

For a bipolar junction transistor, if the current amplification factor and cut-off frequency in the CB mode are α_CB and fα_CB respectively, then the cut-off frequency in the CE mode is equal to

In the circuit shown below, the silicon npn transistor Q has a very high value of β. The required value of R₂ (in kΩ) to produce I_c = 1 mA is

The given circuit represents the amplifier type as:

Consider the common-collector amplifier in the figure (bias circuitry ensures that the transistor operates in forward active region, but has been omitted for simplicity). Let I_C be the collector current, V_BE be the base-emitter voltage and V_T be the thermal voltage. Also, g_m and r_o are the small-signal trans-conductance and output resistance of the transistor, respectively. Which one of the following conditions ensures a nearly constant small signal voltage gain for a wide range of values of R_E?

Find V_O for the given circuit. (Assume ideal diode)

Which of the stages listed below would drive the loudspeaker, in a class D amplifier?

In a digital frequency meter, the Schmitt trigger is used for

Leakage current approximately doubles for every 10°C increase in temperature of a silicon transistor. If a silicon transistor has I_CBO = 1000 nA at 30°C, what is its leakage current at 90°C?

In an RC differentiator, the condition for differentiation is

A circuit is shown in the given figure. The largest value of R_L that can be used is