1. Consider the following circuit using an ideal OP-AMP. The I-V characteristic of the diode is described by the relation I = I

a. 0 volts

b. 0.1 volts

c. 0.7 volts

d. 1.1 volts

Solution:
https://www.youtube.com/watch?v=Hm-AQGstHH0

2. The OP-AMP circuit shown below represents a

a. High pass filter

b. Low pass filter

c. Band pass filter

d. Band reject filter

Solution:
https://www.youtube.com/watch?v=iNclgQhX8gs

3. Consider the schmitt trigger circuit shown below.

A triangular wave which goes from –12 volts to +12 volts is applied to the inverting input of OP-AMP. Assume that the output of the OP-AMP swings from +15 volts to –15 volts. The voltage at the non-inverting input switches between

a. – 12 volts and +12 volts

b. – 7.5 volts and +7.5 volts

c. – 5 volts and +5 volts

d. 0 volts and +5 volts

Solution:
https://www.youtube.com/watch?v=U1PM8Q0IT0o

In the following transistor circuit, V

4. The value of DC current I

a. 1 mA

b. 2 mA

c. 5 mA

d. 10 mA

5. The mid-band voltage gain of the amplifier is approximately

a. – 180

b. – 120

c. – 90

d. – 60

Solution(4 & 5):
https://www.youtube.com/watch?v=eX0es1gFdW4

_{o}(exp(V/V_{T}) - 1), where VT = 25 mV, I_{o}= 1 µA and V is the voltage across the diode(taken as positive for forward bias). For an input voltage V_{i}= - 1 volts, the output voltage V_{o}isa. 0 volts

b. 0.1 volts

c. 0.7 volts

d. 1.1 volts

2. The OP-AMP circuit shown below represents a

a. High pass filter

b. Low pass filter

c. Band pass filter

d. Band reject filter

3. Consider the schmitt trigger circuit shown below.

A triangular wave which goes from –12 volts to +12 volts is applied to the inverting input of OP-AMP. Assume that the output of the OP-AMP swings from +15 volts to –15 volts. The voltage at the non-inverting input switches between

a. – 12 volts and +12 volts

b. – 7.5 volts and +7.5 volts

c. – 5 volts and +5 volts

d. 0 volts and +5 volts

**Statement for Linked Answer Question:**In the following transistor circuit, V

_{BE}= 0.7 volts, r_{e}= 25 mV/I_{E}, β and all the capacitances are very large.4. The value of DC current I

_{E}isa. 1 mA

b. 2 mA

c. 5 mA

d. 10 mA

5. The mid-band voltage gain of the amplifier is approximately

a. – 180

b. – 120

c. – 90

d. – 60

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