Reciprocal Labs Corporation

Zentrum Mikroelektronic Dresden Ag

Sam Koblenski

John David Van Sickle

Leah J Morrell

Eric Hoffman

David Hubanks

Ben Kopp

Greg Tracy

Gregory F Tracy

Justin Conrad Krosschell

Mathias Krauss

Usage monitoring attachment for an inhaler

Usage monitoring attachment for a dry powder inhaler

Usage monitoring attachment for a soft mist inhaler

Method and system are provided for evaluating linearity of a capacitive-to-digital converter (CDC) of a capacitive sensor integrated circuit chip. The evaluating employs multiple test capacitors, which may be on-chip with the CDC, and includes: obtaining capacitance values for the multiple test capacitors and parasitic capacitances of a first input A and a second input B to the capacitive-to-digital converter; applying the multiple test capacitors in multiple permutations to the first input A and the second input B, and for each of at least some permutations, determining an error between an expected output of the CDC using the obtained capacitance values and an actual measured output of the CDC; and determining linearity error for the CDC using the determined errors for the permutations of applying the multiple test capacitors to the first input A and the second input B of the CDC.

Capacitive input test method

Growing community of inventors

Madison, WI, United States of America

Sam Koblenski