5.Assignment/Tutorials

 Short Answer Questions 

1.  List any two ideal characteristics of an operational amplifier. 

2.  State the function of Pin 2 and Pin 3 in the IC 741 Op-Amp. 

Long Answer Questions 

3.  Explain the concept of virtual ground with reference to the inverting amplifier configuration. 

4.  Draw the block diagram of an Op-Amp and describe the function of each block. 

5.  Describe negative feedback in Op-Amps and explain the working of an inverting amplifier configuration with feedback. 

Short Questions 

1.  What is a voltage follower and where is it commonly used? 

2.  Define an instrumentation amplifier and state one practical application. 

3.  Write the formula for the output voltage of an integrator circuit. 

Long Questions 

4.  Explain the working of an inverting summing amplifier with a circuit diagram and derive its output expression. 

5.  Describe the working and features of the instrumentation amplifier IC INA823, including its advantages in biomedical applications

Attempt any Five questions

1. Design a first-order low-pass filter so that it has a cutoff frequency of 2 kHz and a pass band gain of 1. 

2. Design a second-order low-pass filter at a cutoff frequency of 1.2 kHz. 

3. Design a first-order high-pass filter at a cutoff frequency of 400 Hz and a pass-band gain of 1. 

4. Design a second-order high-pass filter at a cutoff frequency of 1 kHz. 

5. Design a wide band pass filter with fL=400 Hz and fH=2 kHz. Pass band gain =4.

6. Design a narrow band pass filter with fC=2kHz and Q=20. Pass band gain = 10

7. Design a wide band reject filter with fL=2 kHz and fH=400 Hz.

8. Design a notch filter with 400 Hz frequency.

Attempt any Five Questions

1. Design a phase shift oscillator so that fo​=1 kHz. 

2. Design a Wien bridge oscillator that will oscillate at 2 kHz. 

3. Design a quadrature oscillator to operate at a frequency of 1.5 kHz. 

4. Design a square wave generator to operate at a frequency of 2 kHz. 

5. Design a triangular wave generator with fo​=1.5 kHz and vo​(pp)=5 V. 

6. For a particular phase shift oscillator the following specifications are given: C = 0.1 uF, R=3.9 kΩ, and ∣RF​/R1​∣=29. Determine the frequency of oscillation. 

7. A certain Wien bridge oscillator uses R=4.7 kΩ, C = 0.01 uF, and RF​=2R1​. What is the frequency of oscillation?

8. In the square-wave generator of if R1​=12 kΩ, R2​=13.92 kΩ, R=100 kΩ, and C = 0.01u, what is the frequency of oscillation?  

Attempt any Five Questions

1. A 555 timer is connected for monostable operation. If R = 10 kohms and C= 0.047 uF, what is the width of the output pulse?

2. For VCC = 10 V, R = 2.2 kohms , and C = 0.2 uF.  What is the minimum trigger voltage that produces an output pulse? What is the maximum capacitor voltage? What is the width of the output pulse?

3. An astable 555 timer has R1 = 10 kV, R2 = 2 kohms , and C= 0.0022uF. What is the frequency?

4. The 555 timer of has R1 = 20 kohms , R2 = 10 kohms , and C = 0.047uF. What is frequency of the output signal? What is the duty cycle?

5. Draw a Fixed Voltage power supply to generate +5 V DC.

6. Draw a Fixed Voltage power supply to generate -9 V DC.

7. Draw a variable power supply to generate +12 V and -12 V DC.