The Need
Our customer, a leading Healthcare service provider was looking to develop a Nerve stimulator aimed to treat inflammatory diseases when drugs are not effective and surgery not possible. The device should use certain frequencies of audio signal at different amplitude for nerve stimulation.
Impacts Delivered
- Designed a system with high reliability, modularity, security, and performance
- The system has successfully completed field trials and FDA certification.
Our Solution
- Requirements Gathering & Analysis, competitive product study, H/W Architecture development and finalization, Firmware architecture development and finalization, Power requirement analysis via power estimation, component selection of all major components with CBOM with MOQ, LT etc.
- Critical placement & routing to accommodate BLE, Fuel gauge, Battery charger, Audio Transformer etc. in small form factor.
- Hardware design(Schematics) using Altium Designer
- Critical placement & routing to all components in small form factor
- DSP amplifier used for generating quality audio signals without click pop noise.
- Part selection to minimal footprint as possible to accumulate all components for two products in required PCB dimensions.
- PCB Design (Layout)
- Modular & Small form-factor design – 49.5*31.75mm, 4-layer 1 mm thick rigid PCB.
- Critical placement & routing to accommodate all components in small form factor
- Fabrication and Assembly /BOM
- DFM and DFA reviews
- Low cost CBOMs with low-cost alternatives identified for high-cost parts, lifetime check for critical components in design.
- The device can generate 1Khz to 10Khz audio signals via I2S interface.
- Firmware Development
- The device supports BLE controlled by nrf softdevice.
- The device can generate 1Khz to 10Khz audio signals via I2S interface.
- The device is controlled from mobile app.
- Bring-up and Testing
- Initial bring-up of the board followed by detailed Electrical interface validation(EVT) including interface validation for the various interfaces
- Mechanical & 3D Design
- Mechanical and 3-D design and Customization of off-the shelf mechanical enclosure to fit for the two products.
Tools & Technologies
- Interfaces – BLE, LEDs, USB, Tactile Switch, Mono Audio Jack
- Open-source native mobile app development
- DSP amplifier used for generating quality audio signals without click pop noise.
- Class D amplifier used for battery friendly design.
