Agenda
MSc ME Thesis Presentation
- Wednesday, 23 October 2019
- 15:00-15:30
- LB 01.010 Snijderszaal
A PLL-based eddy current displacement sensor for button applications
Matheus Ferreira PimentaThis thesis presents an eddy current sensor (ECS) for button readout applications. The interface embeds the coil sensor in a digitally controlled oscillator (DCO) and uses a highly digital phase locked loop (PLL) to convert the displacement information into a digital output.
The sensor achieves more than 12bit effective resolution, which translates into an equivalent displacement resolution in excess of 10nm RMS. The interface consumes less than 235µA from a 1.8V supply, resulting in a very power efficient architecture.