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Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(ECE / ETE) (2011 Onwards) (Sem.-4)
PULSE WAVE SHAPING AND SWITCHING
Subject Code : BTEC-405
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M.Code: 57597
Time: 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES:
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
- Any missing data can be assumed appropriately.
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SECTION-A
- Answer briefly :
- Differentiate between RC low pass and RC high pass filter.
- Write the output voltage expression and draw input and output waveform for the input voltage (Vmsinot) applied to a pure inductor.
- What is the role of feedback in electronics circuits.
- What do you mean by self bias bistable multivibrator?
- What is the difference between average and RMS values.
- Define resolution time in multivibrator.
- Define switching time in PN diode.
- Define UTP and LTP.
- Differentiate between linear and non-linear wave-shaping circuits.
- List the applications of attenuator.
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SECTION-B
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- The fig shows double Clipper circuit. Determine its output waveform. Assume diode drop of 0.7 V with sinusoidal input with ° 20 V. Also VB1 and VB2 are 4V and 9V respectively.
R1
D1 D2
Vi Vo
+
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VB1 VB2- Explain the working of bistable multivibrator as “T” flip flop?
- State and prove Clamping Circuit Theorem.
- Explain the working of Schmitt trigger.
- How the BJT work as switch?
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SECTION-C
- With waveforms, derive the expression for the frequency of oscillation of an astable multivibrator.
- Derive the response of low pass RC circuit for pulse input voltage and draw the waveform.
- Explain any two with necessary diagrams :
- Passive and active elements
- Positive and negative clamper
- Diode comparator
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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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