Analog and Digital IC Applications (R23)
Question bank
UNIT-I: Short Answer Questions
1 Draw the pin diagram of IC 741
2 Write the features of IC 741
3 Draw the equivalent circuit of op-amp
4 A certain op-amp has an open-loop differential voltage gain of 100,000 and a common-mode
gain of 0.2. Determine the CMRR and express it in decibels.
5 Describe the characteristics of a comparator
6 List the advantages of differential amplifiers.
7 What are the advantages of ICs over discrete circuits?
8 List the important features of an instrumentation amplifier
9 Define PSRR
10 Draw the AC amplifier circuit
UNIT-II: Short Answer Questions
1 Write the various design steps of first order high pass filter.
2 What is the significance of all pass filters?
3 List the advantages of active filters over passive filters.
4 Define capture range and lock range in PLL.
5 Draw the circuit diagram of all pass filter and write its output voltage equation
6 Draw the pin diagram of IC 555 and explain each pin.
7 Define filters and draw the output characteristics of LPF
8 Define bandwidth, cutoff frequency and transfer function in a filter
9 Draw the circuit of sawtooth waveform generator
10 List out the applications of 555 Timer in monostable mode.
UNIT-III: Short Answer Questions
1 Define conversation time and settling time in ADC and DAC
2 What are the disadvantages of weighted resistor-type DAC
3 Mention the types of DAC’s.
4 List out different Analog to digital convertors and justify which A/D convertor is
best in terms of speed.
5 Define the terms Linearity and accuracy of A/D convertors.
6 What are advantages and disadvantages of dual slope ADC?
7 Write short notes on monotonicity in DAC
8 Define resolution of a converter.
9 Define settling time and stability of converters
10 Give the specifications of ADC
UNIT-IV: Short Answer Questions
1 Explain the terms i) Noise margin ii) Transition time with respect to CMOS logic
2 What are the data types available in VHDL
3 What are the advantages and disadvantages of CMOS technology?
4 Give the logic levels and noise margins of CMOS and TTL families.
5 Design a two input CMOS NAND gate
6 Draw the CMOS inverter circuit
7 Define logic gate and logic family.
8 Distinguish between static and dynamic power dissipation of CMOS circuit
9 Give the comparisons between combinational and sequential circuits
10 What are the Universal gates and explain why they called so?
UNIT-V: Short Answer Questions
1 What are the differences between PROM, PLA and PAL
2 Distinguish between SRAM and ROM
3 Convert a T flip-flop into a JK Flip-flop
4 List out the applications of ROM.
5 What are the commercial ROM types?
6 Compare latches and flip-flops.
7 Write the difference between synchronous counter and asynchronous counter
8 What is ring counter
9 What do you mean by sequential circuit
10 What is the difference between Ring Counter and Twisted ring counter?
Analog and Digital IC Applications (R23)
Question bank
UNIT-I: Long Answer Questions
1 i Discuss all the A.C and D.C characteristics of op-amp in detail with relevant
expressions?
ii Write the Ideal and Practical values of all performance parameters of an Op-amp
2. i Derive the expression for the gain of an ideal non-inverting amplifier. Draw the input and
output waveforms?
ii Explain op-amp integrator circuit with suitable mathematical expressions?
3
Using transducer bridge and three Op-Amps draw the circuit diagram of an instrumentation
amplifier and derive the expression for its output voltage.
4 i Draw the circuit diagram of an op-amp differentiator and derive an expression for the
output in terms of the input.
ii Explain the operation of a non-inverting comparator with the help of a neat diagram
5 i Define the terms
i) CMRR
ii)Slew rate
iii) PSRR
ii Explain the operation of a Schmit trigger with the help of hysteresis and also draw the input and
output waveforms
UNIT-II: Long Answer Questions
1 i Discuss the classification of active filters and explain the frequency response of each type?
ii Design a first order high pass filter with a cutoff frequency of 1 kHz and pass band gain
of 11.
2 i Draw the first order Low- Pass Butter Worth filter and analyze the same by deriving the gain and
phase angle equation?
ii Draw the Wide Band- Pass filter and analyze the same by deriving the gain and phase angle
equation with neat magnitude and phase angle plots?
3 i Draw and explain the internal block diagram of IC 555 timer and its applications.
ii Explain about Astable operation with IC 555 timer with relevant waveforms?
4 i Design a wide band-reject filter having fH= 200 Hz and fL = 1 kHz. Draw the circuit and
assume necessary data
ii Explain the various blocks of PLL with neat diagram.
5 i Draw the square waveform generator circuit and explain its operation
ii Draw the All Pass filter using op-amp and analyze the same by deriving the gain and phase angle
equation
UNIT-III: Long Answer Questions
1 i Explain the operation of weighted resistor type of DAC with a neat diagram and also write
its advantages.
ii Explain in detail the operation of 3-bit parallel ADC with a neat circuit diagram.
2. i Draw the simplified block diagram of a successive approximation ADC and explain its
working.
ii Explain the differences between current-mode and voltage-mode R–2R ladder D/A
converters.
3 i Explain the counter type ADC with a neat block diagram and list out its disadvantages.
ii A 4-bit R-2R ladder type D/A converter having resistor values of R = 10 kΩ and
2R = 20 kΩ, uses VR of 10V. Find: i) the resolution of the D/A converter, and
ii) Io for a digital input of 1101.
4 i Explain the working of dual slope-type of ADC with a neat diagram.
ii Explain the principle of inverted R-2R type DAC and write its advantages and
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disadvantages.
i Explain about basic DAC technologies with schematic diagram
5 ii Give the specifications of both ADC and DAC
UNIT-IV: Long Answer Questions
1 i Explain the following terms with reference to TTL logic family.
1. Logic levels
2. Noise Immunity
3. Fan out
4. Propagation delay
ii Explain in detail about the TTL families. Explain about logic family and types of logic
families.
2. i Design a 16 to 1 Multiplexer using 2 IC 74LS151 Multiplexers.
ii Draw the logic diagram of 74XX83 explain its operation with truth tables
3 i
Draw the logic diagram of 74XX138 IC and explain it functionality.
ii Design a 16-bit comparator using 74X85 IC’s.
4 i Explain clearly about 74XX148 priority encoder with its logic symbol.
ii Design a BCD to Binary Code Converter and explain its operation
5 i Explain in detail about parallel adder/ subtractor ?
ii Explain in detail about priority generator and checker?
UNIT-V: Long Answer Questions
1 i
Draw the internal structure of dynamic RAM and explain its operation in detail.
ii Explain the concept of SRAM along with circuit diagram.
2. i Explain the operation of SIPO shift registers with the help of timing diagram.
ii Draw the circuit diagram of Johnson Counter and explain its operation in detail,
3 i What do you mean by sequential circuit? Explain with the help of block diagram and
give the comparisons between sequential and combinational circuits.
ii How synchronous counter differ from the Asynchronous counter. Draw the complete
timing diagram for synchronous binary counter.
4 i Explain the architecture of ROM and discuss about the types of ROM.
ii Explain the operation of 4-bit ring counter and also draw its logic diagram.
5 i Explain the architecture of RAM and explain about the types of RAM.
ii Discuss about CMOS 40XX Series ICs with neat pin diagrams. Mention its application in present
scenario
