Back to results
US 12,445,782 B2Granted
Piezoelectric mems device for producing a signal indicative of detection of an acoustic stimulus
AssigneeQUALCOMM Incorporated
InventorsRobert John Littrell, Ronald Gagnon, Karl Grosh
Life of this patent
Estimating the term…
Abstract
A device comprising: a sensor; and a first circuit configured to detect when an input stimulus to the sensor satisfies one or more detection criteria, and further configured to produce a signal upon detection that causes adjustment of performance of the device; and a second circuit for processing input following detection, wherein the second circuit is configured to increase its power level following detection, relative to a power level of the second circuit prior to detection.
Claims27
A device comprising:
- a piezoelectric micro electro-mechanical systems (MEMS) transducer having an output;
- a controllable switch having a control input and configured to provide power to one of a first output or a second output;
- a detection circuit banded over a frequency range and having a signal input coupled to the output of the piezoelectric MEMS transducer, wherein the detection circuit is further coupled to the first output of the controllable switch, wherein the detection circuit is configured to produce a first signal at an output of the detection circuit based on an acoustic level of the piezoelectric MEMS transducer exceeding a threshold level;
- and
- a second circuit coupled to the second output of the controllable switch and the piezoelectric MEMS transducer,
- wherein the controllable switch is configured to alternate between providing power to the detection circuit via the first output of the controllable switch and providing power to the second circuit via the second output of the controllable switch based on the first signal.
3 more elements
A method comprising:
- producing, using a detection circuit banded over a frequency range, a first signal at an output of the detection circuit based on an acoustic level of a signal from a piezoelectric micro electro-mechanical systems (MEMS) transducer exceeding a threshold level;
- and
- alternating, using a controllable switch, between providing power to the detection circuit via a first output of the controllable switch and providing power to a second circuit via a second output of the controllable switch based on the first signal, wherein the second circuit is coupled to the second output of the controllable switch and the piezoelectric MEMS transducer.
Dependencies are inferred from the claim text.