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US 12,301,261 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.
Claims9
An apparatus, comprising:
- a plurality of adaptive analog-to-digital converters (ADCs), configured to generate one of a plurality of digital signals having different scaling factors of an associated sensor signal, wherein the plurality of adaptive ADCs are further configured to be placed in a first low-power mode;
- a low-power mode adaptive ADC of the plurality of adaptive ADCs configured to provide a second low-power mode, wherein the plurality of adaptive ADCs other than the low-power mode adaptive ADC are further configured to be switched off to provide the second low-power mode;
- 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 signal level threshold being sensed in at least one of the plurality of digital signals having different scaling factors;
- and
- a multiplexing component configured to switch from conveying a first digital signal associated with the at least one of plurality of the adaptive ADCs and a second digital signal associated with another of the plurality of the adaptive ADCs.
2 more elements
Dependencies are inferred from the claim text.