1 / 23

Chapter 16

Chapter 16. Additional Op-Amp Applications. Comparators. Comparator – A circuit used to compare two voltages. Comparators are typically used in conjunction with digital circuits. A digital circuit is one designed to respond to alternating dc voltage levels. Comparator Operation.

jana
Download Presentation

Chapter 16

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Chapter 16 Additional Op-Amp Applications

  2. Comparators • Comparator – A circuit used to compare two voltages. • Comparators are typically used in conjunction with digital circuits. • A digital circuit is one designed to respond to alternating dc voltage levels.

  3. Comparator Operation

  4. Level Detector • Level detector – Another name for a comparator used to compare an input voltage to a fixed dc reference voltage.

  5. Setting the Reference Level

  6. Circuit Variations

  7. Smoke Detector: A Comparator Application

  8. Bar Graph Generator

  9. Integrators • Integrator – A circuit whose output is proportional to the area of the input waveform.

  10. Waveform Area

  11. RC Integrator • An ideal RC integrator would produce the triangular (ramp) waveform. • The practical RC integrator produces the exponential waveform.

  12. Op-Amp Integrator • The op-amp provides a constant-current source for the capacitor, causing it to charge at a linear rate.

  13. Differentiators • Differentiator – A circuit whose output is proportional to the rate of change of its input signal.

  14. Summing Amplifiers • Summing amplifier – An op-amp circuit that produces an output proportional to the sum of its input voltages.

  15. General-Class Equation • General-class equation – An equation derived for a summing amplifier that is used to predict the circuit output for any combination of input voltages. • Determine the Rf / R ratio for each branch. • Represent each branch as the product of its resistance ratio and input voltage. • Write the equation as the sum of these products.

  16. Summing Amplifier Analysis

  17. Digital-to-Analog (D/A) Converter • Digital-to-analog (D/A) converter – A circuit that converts digital circuit outputs to equivalent analog voltages.

  18. Averaging Amplifier • Averaging amplifier – A summing amplifier that provides an output proportional to the average of the input voltages.

  19. Difference Amplifier • Difference amplifier – A summing amplifier that provides an output proportional to the difference between two input voltages. Also called a subtractor.

  20. Instrumentation Amplifiers • Instrumentation amplifier – A circuit used to amplify low-level signals in process control and measurement applications.

  21. Audio Amplifier • Audio amplifier – The final audio stage in communications receivers, used to drive the speakers.

  22. Voltage-Controlled Current Source • Voltage-controlled current source – A circuit with a constant-current output controlled by the circuit input voltage.

  23. Precision Rectifier • Precision rectifier – A clipper that consists of a diode and an op-amp. The circuit can clip extremely low-level input signals.

More Related