Test: Analog Electronics - 2 - Electronics and Communication Engineering (ECE) MCQ

If for a given programmable OPAMP, G₁ is the gain, when only S₁ is closed and G₂ is the gain when only S₂ is closed, then relation between G₁ & G₂ is?

For given RC − Phase shift oscillator, by use of BJT if R₁ = R₂ = 10k, R_c = 2K, R = 2K, C = 0.01 µF

Q. 

What is Minimum value of hfe for possible oscillation? 

For given RC − Phase shift oscillator, by use of BJT if R₁ = R₂ = 10k, R_c = 2K, R = 2K, C = 0.01 µF

Q. 

What is frequency of oscillation for circuit? 

For a given CE, amplifier if β = 100, I_C = 1 mA, R_S = 1 KΩ, R_c = 5 KΩ, R_e = 200 Ω, h_ie = 2.5 K.

Q. 

Calculate value of voltage gain

For a given CE, amplifier if β = 100, I_C = 1 mA, R_S = 1 KΩ, R_c = 5 KΩ, R_e = 200 Ω, h_ie = 2.5 K.

Q. 

Calculate input impedance seen by source

For the given FET, circuit if

R_D = 20 kΩ rd = 50 kΩ
R_S = 2 kΩ µ = 50

Q.

Calculate value of v₀/v_s

For the given FET, circuit if

R_D = 20 kΩ rd = 50 kΩ
R_S = 2 kΩ µ = 50

Q. 

Calculate value of output impedance

The output voltage V₀ for given circuit is

A MOSFET amplifier circuit is as shown below:

If device parameter K = 15 µA/V², then value of Transconductance of MOSFET is _________ ms.

The 3-terminal linear voltage regulator is connected to a 10 ohm load resistor as shown in figure. If V_in is 10 volt, what is power dissipated in the Si transistor.

A sinusoidal oscillator is built using an amplifier of real gain A, infinite input impedance and feedback (β) network is shown in figure. If Z = jX, then what is the value of z₀.

Shown below is a network, in collector feedback mode. 

Q.

The voltage gain Av is ……………., Assume r_e = 

Shown below is a network, in collector feedback mode. 

Q.

The current gain A_i is ≈ 

A power amplifier delivers 250 watt output at 50% efficiency. If ambient temp. is 25°C and maxm allowable junction temp. is 150°C, then what is value of Maximum thermal resistance which can be tolerated.

Numerical Anser type question

Q.

For a BJT, CE-mode, Base to emitter capacitance (Cπ) is 10 times the collector to base capacitance (Cµ). If transistor is biased at quiescent collector current ICQ = 1 mA, and its short circuit unity gain frequency is 0.909 M rad/sec, then the value of Cπ is _______ nF.

In voltage reference diodes:

What should be values of components R & R2 such that frequency of wein-bridge oscillator is 300 HZ, if C = 0.01 µF, R1 = 12 kΩ.