**Solution : https://www.youtube.com/watch?v=RrGtXsrXhr0**

2. The circuit shown in the figure is that of

a. A Non-inverting amplifier

b. An Inverting amplifier

c. An Oscillator

d. A Schmitt trigger

**Solution : https://www.youtube.com/watch?v=CUm0AtZGCJA**

3. In the circuit shown, ‘N’ is a finite gain amplifier with a gain of K, large input impedance and very low output impedance. The input impedance of the feedback amplifier with the feedback impedance Z connected as shown will be ______________

**Solution : https://www.youtube.com/watch?v=4ISLXf0p9WM**

4. A Darlington stage is shown in the figure. If the Transconductance of Q

_{1}is gm

_{1}and Q

_{2}is gm

_{2}, then the overall Transconductance g

_{mc}≡ [ic

^{c}/v

_{be}

^{c}] is given by

a. gm

_{1}

b. 0.5 gm

_{1}

c. gm

_{2}

d. 0.5 gm

_{2}

**Solution : https://www.youtube.com/watch?v=UHqoUnpLM7I**

5. Value of R in the oscillator circuit shown in the given figure, so chosen that it just oscillates at an angular frequency of ω. The value of ω and the required value of R will respectively are

a. 10

^{5}rad/sec, 2 x 10

^{4}Ω

b. 2 x 10

^{4}rad/sec, 2 x 10

^{4}Ω

c. 2 x 10

^{4}rad/sec, 10

^{5}Ω

d. 10

^{5}rad/sec, 10

^{5}Ω

**Solution : https://www.youtube.com/watch?v=cf3HdmbWYks**

6. A common emitter amplifier with an external capacitors C

_{C}connected across the base and the collector of the transistor is shown. Given g

_{m}= 5 mA/V, r

_{π}= 20 kΩ, C

_{π}= 1.5 pF and C

_{µ}= 0.5 pF.

a. Determine the ac small signal mid band voltage gain, V

_{o}/V

_{s}.

b. Determine the upper cutoff frequency f

_{H}of the amplifier.

**Solution:**

**https://www.youtube.com/watch?v=15wQMy8qg8A**

7. A resistively loaded and resistively biased differential amplifier circuit is shown. Neglect base current and assume matched transistors with V

_{A}-> ∞ and β = 100. Use V

_{T}= 26 mV, V

_{BE(on)}= 0.7 volts and V

_{CE(sat)}= 0.1 volts.

a. Determine the values of R

_{C}and R

_{E}to meet the following specifications: double ended differential mode gain = 500, CMRR = 500 and differential mode input resistance of 2 MΩ.

b. Determine the minimum values of V

_{CC}and V

_{EE}such that the transistors remain in the forward active region under zero signal condition. Assume that the DC common mode input is zero.

**Solution:**

**https://www.youtube.com/watch?v=9zaM7i-wdmI**

8. Assuming ideal operational amplifiers, show that the circuit shown simulates in inductor i.e. show that V

_{i}(S)/I

_{i}(S) is inductive and write the expression for the effective inductance.

**Solution:**

**https://www.youtube.com/watch?v=PJTRIK_taJA**

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