RxBox - EFM Speaker Debugging

RxBox, a Telehealth System. Designed to provide better access to life-saving health care services in isolated and disadvantaged communities nationwide.

My role as tech maven was to debug the EFM speaker used for medical screening to get more accurate & reliable audio output.

Transcript

1. IRC Debugging Challenge EFM Audio Amplifier
2. What is RxBox?
3. FHR and EFM
4. TDA2822
5. The Problem •Distortion at max volume • Inconsistent Output • No detectable difference in volume when adjusted
6. Methodology: Square Wave Testing
7. Problems Encountered
8. Solution
9. Results and Analysis
17. Conclusion • Causes distortion • High frequency loss • Poor low frequency response and phase shift • Optimal point desired as output for the built-in audio amplifier: 2 Vpp
19. Thank you!