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US 2026/0248409 A1Published application
Pulse width modulation method and apparatus for reading a stretchable capacitive sensor
AssigneeTyme Wear, Inc.
InventorsJuan Carlos Morales Torrico, Arnar Freyr Larusson, Arnar S. Hansson, Gregory Laredo
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Abstract
The techniques described herein relate to a pulse width modulation method and apparatus for reading a stretchable capacitive sensor. An example circuit includes a signal converter configured to convert a capacitance of a stretchable capacitive sensor into a first signal, and control circuitry configured to determine a physiological parameter value for a user based on a rate of change of the first signal.
Claims22
A circuit comprising:
- a signal converter configured to convert a capacitance of a stretchable capacitive sensor into a first signal;
- and
- control circuitry configured to determine a physiological parameter value for a user based on a rate of change of the first signal.
A circuit comprising:
- an integrator configured to generate an excited sensor signal at least in part by exciting a variable rate charging device with a pulse width modulation signal;
- a comparator configured to generate a comparator output signal in response to the excited sensor signal meeting a signal threshold;
- and
- a controller configured to determine a physiological parameter value for a user based on a rate of change of the excited sensor signal, the rate of change based at least in part on the comparator output signal.
1 more element
(canceled)
17-36. (canceled)
A system for determining a physiological parameter of a user, the system comprising:
- at least one stretchable capacitive sensor having a capacitance that changes in response to physiological changes in the user;
- at least one hardware processor;
- and
- at least one computer-readable storage medium storing processor-executable instructions that, when executed by the at least one hardware processor, cause the at least one hardware processor to perform a method comprising:
- exciting the at least one stretchable capacitive sensor with a pulse width modulation signal to generate an excited sensor signal;
- determining a rate of change of the excited sensor signal based at least in part on the excited sensor signal meeting at least one signal threshold;
- and
- determining a value of a physiological parameter for the user based on the rate of change of the excited sensor signal.
5 more elements
Dependencies are inferred from the claim text.