| commit | 6043c956289b4a512058af52016e97088db54984 | [log] [tgz] |
|---|---|---|
| author | Jorge Marin <jorge.marin.ndez@gmail.com> | Fri Dec 31 16:12:11 2021 -0300 |
| committer | Jorge Marin <jorge.marin.ndez@gmail.com> | Fri Dec 31 16:12:11 2021 -0300 |
| tree | d97b8548057d943f34a48c8c623416b5dc9ae876 | |
| parent | 9413811347b0f50f104d2fdaa3d37589a0f21a54 [diff] | |
| parent | 5e086e86a9b5ab1bb2d070a8b62e4e76046871dd [diff] |
Merge branch 'main' of https://github.com/JorgeMarinN/caravel_user_project_analog into main commited before updating README
PLL-BASED CAPACITIVE SENSOR INTERFACE
This project involves the design of a capacitive sensor-to-digital converter using time-based circuit techniques. It uses basic digitally-oriented building blocks (two oscillators, a D-flipflop and a feedback loop including a capacitive element and a switch) to convert input capacitive values into digital single bit traces in the time domain. The basic block diagram can be seen below:
The architecture has been tested for a DC sweep of input capacitive values. Example output trace values for different capacitance inputs are shown below:
The characteristic plot for an average window of 10us is seen below:
Refer to README for this sample project documentation.