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US 10,855,308 B2Granted
Adaptive analog to digital converter (ADC) multipath digital microphones
AssigneeInvenSense, Inc.
InventorMichael Perrott
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Abstract
Exemplary multipath digital microphone described herein can comprise exemplary embodiments of adaptive ADC range multipath digital microphones, which allow low power to be achieved for amplifiers or gain stages, as well as for exemplary adaptive ADCs in exemplary multipath digital microphone arrangements described herein, while still providing a high DR digital microphone systems. Further non-limiting embodiments can comprise an exemplary glitch removal component configured to minimize audible artifacts associated with the change in the gain of the exemplary adaptive ADCs.
Claims26
An apparatus, comprising:
- a plurality of adaptive analog-to-digital converters (ADCs), configured to generate one of a plurality of digital audio signals having different scaling factors of an associated audio signal;
- an ADC range control component configured to adjust gain of at least one of the plurality of adaptive ADCs based at least in part on a respective sound pressure level threshold being sensed in at least one of the plurality of digital audio signals having different scaling factors;
- a plurality of gain compensation components, each associated with one of the plurality of digital audio signals having different scaling factors, wherein the ADC range control component is further configured to adjust gain of at least one of the gain compensation components on a continuous basis to compensate for a change in the gain of the at least one of plurality of the adaptive ADCs;
- and
- a glitch removal component configured to minimize audible artifacts associated with the change in the gain of the at least one of plurality of the adaptive ADCs.
2 more elements
A method, comprising:
- generating a plurality of digital audio signals, each having different scaling factors of an associated audio signal, with a plurality of adaptive analog-to-digital converters (ADCs);
- adjusting gain of at least one of the plurality of adaptive ADCs via an ADC range control component configured to adjust gain based at least in part on a respective sound pressure level threshold being sensed in at least one of the plurality of digital audio signals having different scaling factors;
- adjusting gain via a plurality of gain compensation components, each associated with one of the plurality of digital audio signals having different scaling factors, wherein the ADC range control component is further configured to adjust gain of at least one of the gain compensation components on a continuous basis to compensate for a change in the gain of the at least one of plurality of the adaptive ADCs;
- and
- removing at least one glitch associated with the plurality of digital audio signals having different scaling factors via a glitch removal component configured to minimize audible artifacts associated with the change in the gain of the at least one of plurality of the adaptive ADCs.
2 more elements
Dependencies are inferred from the claim text.