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7. Op-Amps in Instrumentation Circuits

Instrumentation circuits are essential for amplifying and processing signals from sensors, with operational amplifiers (Op-Amps) playing a crucial role due to their high gain and precision. The chapter covers various aspects of instrumentation amplifiers, precision rectifiers, low-noise amplifiers, and differential amplifiers, outlining their designs, characteristics, and applications in measurement systems.

Sections

  • 7

    Op-Amps In Instrumentation Circuits

    This section focuses on the use of operational amplifiers (Op-Amps) in instrumentation circuits for signal amplification and processing.

  • 7.1

    Introduction To Instrumentation Circuits

    Instrumentation circuits amplify and process signals from sensors, primarily using operational amplifiers (Op-Amps) for accuracy.

  • 7.2

    Instrumentation Amplifiers

    Instrumentation amplifiers are specialized differential amplifiers used for low-level signal amplification, featuring high input impedance and excellent common-mode rejection ratio (CMRR).

  • 7.2.1

    Basic Design Of Instrumentation Amplifiers

    Instrumentation amplifiers are critical for low-level signal amplification, combining multiple op-amps for precision and noise rejection.

  • 7.2.2

    Key Characteristics Of Instrumentation Amplifiers

    Instrumentation amplifiers provide precise amplification for low-level signals with high input impedance and excellent common-mode rejection.

  • 7.2.3

    Applications Of Instrumentation Amplifiers

    Instrumentation amplifiers are essential for accurately amplifying low-level signals in various applications, including medical instruments and industrial sensors.

  • 7.2.4

    Lab Work On Instrumentation Amplifiers

    This section focuses on the practical application of constructing an instrumentation amplifier and measuring its output.

  • 7.3

    Precision Rectifiers And Peak Detectors

    This section discusses precision rectifiers and peak detectors, focusing on their designs and applications in signal processing.

  • 7.3.1

    Precision Rectifiers

    Precision rectifiers use operational amplifiers to rectify AC signals with high accuracy, crucial in signal processing.

  • 7.3.2

    Peak Detectors

    Peak detectors are circuits that utilize diodes and operational amplifiers to track and hold the peak voltage of given waveforms.

  • 7.3.3

    Lab Work On Precision Rectifiers And Peak Detectors

    This section covers the lab work involved in building precision rectifiers and peak detector circuits using op-amps.

  • 7.4

    Low-Noise Amplifiers

    Low-noise amplifiers (LNAs) are designed to amplify weak signals with minimal added noise, making them essential for applications requiring precise measurements.

  • 7.4.1

    Design Of Low-Noise Amplifiers

    This section focuses on the design considerations for low-noise amplifiers (LNAs) critical for amplifying weak signals with minimal noise interference.

  • 7.4.2

    Applications Of Low-Noise Amplifiers

    Low-noise amplifiers (LNAs) are crucial in enhancing weak signals with minimal noise, making them essential in various sensitive applications.

  • 7.4.3

    Lab Work On Low-Noise Amplifiers

    This section outlines a laboratory procedure for designing and testing a low-noise amplifier (LNA), emphasizing its critical role in applications requiring amplification of weak signals with minimal noise.

  • 7.5

    Differential Amplifiers In Instrumentation

    Differential amplifiers amplify the difference between two input signals while rejecting common-mode noise, making them essential in instrumentation circuits.

  • 7.5.1

    Design Of Differential Amplifiers

    Differential amplifiers are crucial components in instrumentation circuits, designed to amplify the difference between two input signals while rejecting common-mode noise.

  • 7.5.2

    Applications Of Differential Amplifiers

    Differential amplifiers are crucial components in instrumentation circuits, effectively amplifying the difference between two input signals while eliminating common-mode noise.

  • 7.5.3

    Lab Work On Differential Amplifiers

    This section focuses on the lab work involved in building a differential amplifier and measuring its output under various conditions.

  • 7.6

    Summary Of Key Concepts

    This section summarizes key concepts related to the use of Op-Amps in instrumentation circuits, including instrumentation amplifiers, precision rectifiers, low-noise amplifiers, and differential amplifiers.

References

ee5-lic-7.pdf

Class Notes

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What we have learnt

  • Instrumentation amplifiers ...
  • Precision rectifiers and pe...
  • Low-noise amplifiers amplif...

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