1 / 28

Operational Amplifiers (Op Amps)

Operational Amplifiers (Op Amps). Adnan Pandjou Hunter Moore Tyler Randolph. Agenda. Background Ideal Op Amp Inverting Non-inverting Integrating Differential Summing Applications Conclusion. Background.

trynt
Download Presentation

Operational Amplifiers (Op Amps)

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. Operational Amplifiers(Op Amps) Adnan Pandjou Hunter Moore Tyler Randolph

  2. Agenda • Background • Ideal Op Amp • Inverting • Non-inverting • Integrating • Differential • Summing • Applications • Conclusion

  3. Background • Originally designed to perform mathematical operations in 1940 using vacuum technology • The first integrated op-amp to become widely available was produced in the late 1960’s by Fairchild • Wide variety of applications, low cost, and easily manufactured

  4. Ideal Op Amp

  5. InvertingOp Amp

  6. Non-inverting

  7. Integrating Inverting op-amp feed back resistor replaced with a capacitor Input voltage is integrated by using a capacitor Smoothes out signals and helps to remove offset Used for PID controllers

  8. Differential If all of the resistors are equal, the differential op-amp becomes a difference amplifier Vout=V1-V2 If R4=R3 and R2=R1, then it becomes amplified difference op-amp Vout=(V2-V1)R3/R1

  9. Summing Summing amplifiers combine signals by adding directly or scaling and then adding If all resistors are equal Audio mixers sum several signals with equal gains Digital-to-analog converters use different resistors to give a weighted sum LED’s use summing amps to apply a DC off set to AC voltage to keep it in its linear operating range

  10. Applications • Low Pass Filters • High Pass Filters • Offset Comparator • Data acquisition

  11. Low Pass Filter • Used to filter frequencies above fc • Second order • Active

  12. High Pass Filter • Used to filter frequencies below fc • Second order • Active • C2 and R2 switched

  13. If Output = 0V If Output = 5V Offset Comparator • Good for setting thresholds

  14. Offset ComparatorExample IR detector • Setting thresholds for IR detector Op-amp R1 R2

  15. Data acquisition • Signal amplification • Example (Lab 2)Amplification of strain gage signal

  16. Example Data acquisition Differential Circuit

  17. Where to get Op-ampsfor Free • Companies give free sampleswww.national.com

  18. Where to get Op-ampsfor Free • 5 (max 5 of each kind) samples per week

  19. Design tools

  20. Design tools

  21. Design tools

  22. Design tools Parts List

  23. Design tools Design simulation

  24. Conclusion • Wide range of application • Lots of recourses • Look at other previous student presentations

  25. Questions?

  26. Appendix

  27. Inverting i2 ia i1 VA VB

  28. Non-Inverting VA

More Related