EXAMINATION BRANCH

QUESTION BANK

Name of the branch: ECE YearSem:II-II

Name of the subject: PULSE AND DIGITAL CIRCUITS

Name of the faculty, Desig.& Mob:G LAXMAN,ASST PROF.9963933378

Date of Examination: Academic Year: 2015-16

NOTE: All the faculty requested to use Question Style - Calibri and Size - 12

UNIT-IV

S.N0 / QUESTION / APPEARED IN (R05,R07, R09, R13) / MARKS
Assigned
1 / a)Explain the operation of bistablemultivibrator circuit with circuit
diagram and waveform
b)Why collector catching diodes are used in multi vibrators? / 2014 / 10
2 / Explain with the help of neat circuit diagram the principle of operation of
monostablemultivibrator, and derive an expression for pulse width. Draw the wave forms at collector and Bases of both transistors? / 2013 / 10
3 / Draw the various wave shapes of the astable multi vibrator and explain the operation? / 2012 / 10
4 / Explain the basic principles of Miller and Bootstrap time base generators? / 2013 / 10
5 / With the help of a neat circuit diagram and waveforms explain the
working of a transistor Miller time base generator. / 2012 / 10
6 / Distinguish between unsymmetrical and Symmetrical triggering? Why itis used? / 2012 / 10
7 / Explain different triggering methods of binary circuits. / 2012 / 10
8 / Explain how Schmitt trigger circuit act as a switch. / 2011 / 10
9 / a) Draw and clearly indicate the restoration time and fly back time on the typical waveform of a time base voltage.
b) Derive the relation between the slope, transmission and displacement errors / 2013 / 10
10 / Define sweep speed error, transmission error and displacement error pertaining to sweep circuits. Also derive the expressions for the same with respect to an exponential sweep circuit. How are linearly varying current waveforms generated? / 2012 / 10
11 / With the help of neat diagram explain the working of transistor Bootstrap time base generator / 2011 / 10
12 / With the help of neat circuit diagram and waveforms, explain the working of a collector coupled Astable Multivibrator? Obtain the expression for frequency in AstableMultivibrator / 2013 / 10
13 / Draw the circuit diagram of transistor Miller time base generator and explain its working. / 2013 / 10
14 / An exponential sweep results when a capacitor is charged fr m a supply voltageV through a resistor R. If the peak sweep voltage is Vs , derive an expression for stope error (es). / 2013 / 10
15 / Find the pulse width, period and frequency of output of a astablemultivibrator given R1=R2 and 100 kΩ and C1=C2=0.1μF / 2013 / 10

UNIT-V

S.N0 / QUESTION / APPEARED IN (R05,R07, R09, R13) / MARKS
Assigned
1 / Explain the three input OR gate and explain its operation. / 2014 / 10
2 / Compare the advantages and disadvantages of transistor and diode logic. / 2013 / 10
3 / Draw a TTL NAND gate and explain its operation / 2012 / 10
4 / Draw a three input AND gate and verify its truth table using diodes &
resistors. / 2013 / 10
5 / Draw the inverter using transistor and explain its working. / 2012 / 10
6 / Draw the circuit diagram of diode - resistor logic AND and OR gate and
explain its operation. / 2012 / 10
7 / What do you mean by a relaxation circuit? Give a few examples of
relaxation circuits. / 2012 / 10
8 / With the help of neat waveforms, explain sine wave frequency division
with a sweep circuit. / 2011 / 10
9 / Explain the principle of synchronization" and `synchronization with
frequency division'. / 2013 / 10
10 / Explain the method of pulse synchronization of relaxation devices, with
examples. / 2012
2011 / 10
10
11 / With neat circuit, waveforms explain the frequency division in
monostablemultivibrator. / 2012 / 10
12 / Compare TTL and RTL logic and Draw the Transistor logic NAND gate
and explain itsoperation / 2013 / 10
13 / Draw the circuit diagram of NAND , NOR gate using DTL logic and explain / 2012 / 10
14 / With the help of a circuit diagram and waveforms, explain frequency
division of an astablemultivibrator with pulse signals. / 2014 / 10 / synchronization andsynchronization
15 / A UJT sweep operates with Vv = 3V, Vp=16V and _=0.5. A
sinusoidal synchronizing voltage of 2V peak is applied between basesand the natural frequency of the sweep is 1kHz, over what range ofsync signal frequency will the sweep remain in 1:1 synchronism withthe sync signal? / 2013 / 10