19ELC201 Sensors and Sensor Circuit Design

Introduction to the Course

3rd Semester B.Tech. ELC

2021 - 2022

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Course Objective

To provide understanding of operating principles of different sensors and

design of sensor circuits

▪ Electrical, Thermal and Mechanical sensors

▪ Design of sensor circuits

▪ Analog and digital signal conditioning techniques

What you will learn?

SyllabusUnit 1

Electrical Sensors: Hall effect sensor, CT, PT. Thermal Sensors: Thermistors, Mechanical

Sensors: Displacement- LVDT, Pressure sensors, Flow sensors. Semiconductor Resistance

versus Temperature, Thermocouples. Design of temperature indicator using IC sensors, Errors

due to resistance drift, effects of Op amp offset voltage drift, offset current drift. Error

budgeting. Practical design of 4-20 mA current transmitter for resistance sensors and LVDT

sensor.

Unit 2 Instrumentation amplifier. Practical designing of a capacitor measurement circuit. Ratio

transformer technique. Differential capacitor measurement. Errors in the capacitance

measurement. Phase sensitive detection and use of the same for lock-in amplifier design.

Unit 3

Analog and Digital Signal Conditioning - Principles of analog signal conditioning, Signal-Level

and Bias Changes, Linearization, Conversions, Filtering and Impedance Matching Concept of

Loading. Sensor-to-Frequency Conversion Data-Acquisition Systems: Hardware and Software

of Data Acquisition System (DAS) Characteristics of digital data: Digitized Value, Sampled Data

Systems, Linearization.

Textbook:

1. Robert B. Northrop, “Introduction to Instrumentation and Measurement”, 3rd Edition,

CRC – Press – Taylor and Francis Group.

References

1. Paul Horowitz and Winfield Hill, “The Art of Electronics”, 2nd Edition, Cambridge

University Press, 1992.

2. Curtis D. Johnson, “Process Control Instrumentation Technology”, 6th Edition, Prentice

Hall International Edition.

3. John G. Webster, “Measurement, Instrumentation, and Sensors Handbook”, CRC Press,

Taylor and Francis Group.

4. Circuits for Analog System Design (NPTEL) - Prof. M.K. Gunasekaran, IISc, Bangalore.

Course Objective

To provide understanding of operating principles of different sensors and design of sensor

circuits

Course Outcome

Course Outcome

CO1: Knowledge on operating principles of different types of sensors.

CO3: Learning of analog and digital signal conditioning techniques

CO4: Ability to implement sensor circuits

CO2: Ability to design sensor circuits.

CO1: Understanding of operating principles of different types of sensors (BTL–2)

CO2: Ability to design sensor circuits (BTL – 3)

CO3: Ability to apply analog and digital signal conditioning techniques (BTL – 3)

CO4: Ability to demonstrate sensor interface circuits through hardware and

simulation. (BTL – 4)

Evaluation Pattern

Component Assessment % Weightage

Internal

Mid term exam 20%

Quiz 15%

Lab 30%

External

End Semester

35%Viva-Voce

Total marks 100

Thank you