Electrical Measurement and Electronic Instruments | NPTEL | Week 8
Problem Solving and Doubt Clearing Session
Link to Notes - https://drive.google.com/drive/folder...
00:00 - Start
00:42 - Outline of session
02:00 - What is frequency
04:25 - Digital frequency measurement
06:50 - Signal Processing to convert real-world analog signal to a logic signal of same frequency
15:35 -Why do we need a Schmitt trigger
21:12 - Schmitt trigger circuit
24:00 - Derivation of voltage equation at positive terminal of op-amp
26:30 - Derivation of lower trigger point (LTP)
29:05 - Derivation of upper trigger point (UTP)
31:40 - Waveforms for a non-inverting Schmitt trigger
39:05 - Characteristics of the Schmitt trigger
45:40 - Digital Frequency measurement using direct counting method
53:50 - Digital Frequency measurement using reciprocal counting method
59:12 - Question 1 | Non-inverting Schmitt trigger | Hysteresis band
01:11:40 - Question 2 | Digital frequency measurement | Reciprocal counting method
01:17:36 - Question 3 | Error in frequency measurement | direct counting method
01:23:40 - Question 4 | Inverting Schmitt Trigger | UTP | LTP | band
01:31:20 - Question 5 | Non-inverting Schmitt Trigger | UTP | LTP | band
01:36:01 - LTSpice Demonstration - Inverting Schmitt Trigger
01:43:51 - LTSpice Demonstration - Non-inverting Schmitt Trigger
1:47:41 - Brief recap of the session
Be watchful of the units while solving sums.
Post your queries and doubts.