Selective wakeup of digital sensing and processing systems using reconfigurable analog circuits
According to some embodiments, a sensor network may be provided with re-programmable and/or reconfigurable analog circuitry configured to monitor data collected by the sensor network. The re-programmable and/or reconfigurable analog circuitry may also generate a wakeup signal in response to a defined wakeup event detected by the sensor network.
1. A system, comprising:
a sensor network; and
re-programmable and/or reconfigurable analog circuitry configured to monitor data collected by the sensor network, transform the collected data via one or more layers of processing into a space where defined wakeup events are separated from noise and other events, and selectively generate a wakeup signal in response to a defined wakeup event detected by the sensor network indicating that the collected data is associated with amplitude modulation in a speech band, wherein the defined wakeup event is programmable, after the system is deployed, by receipt of a wireless signal associated with switch and/or bias information.
2. The system of claim 1 , further comprising digital processing circuitry configured to wake up from a hibernation state in response to the wakeup signal.
3. The system of claim 1 , wherein the defined wakeup event is further associated with a frequency movement in pre-defined direction within a defined range of frequencies.
4. The system of claim 1 , wherein the sensor network is configured to detect at least one of audio, vibration and motion.
5. The system of claim 1 , wherein the sensor network comprises a microphone.
6. The system of claim 1 , wherein the re-programmable analog circuit comprises a reconfigurable Field-Programmable Analog Array (“FPAA”) including a plurality of computational analog blocks configured to process a signal received from the sensor network.
7. The system of claim 6 , wherein at least one of the plurality of computational analog blocks comprises a spectral analysis stage.
8. The system of claim 6 , wherein at least two of the plurality of computational analog blocks are configured to perform parallel processing of signals from the sensor network.
9. The system of claim 1 , further comprising a wireless interface for communication with a user device.
10. The system of claim 9 , wherein the re-programmable analog circuitry is configured via a user interface implemented on the user device.
11. The system of claim 10 , wherein the re-programmable analog circuitry comprises a Field-Programmable Analog Array (“FPAA).
12. A method, comprising:
monitoring data collected by a sensor network via re-programmable and/or reconfigurable analog circuitry;
transforming the collected data via one or more layers of processing into a space where defined wakeup events are separated from noise and other events; and
generating a wakeup signal in response to a presence of speech condition detected by a multi-stage analysis of the data collected by the sensor network, wherein the presence of speech condition is programmable after the sensor network and re-programmable and/or reconfigurable analog circuitry are deployed.
13. The method of claim 12 , further comprising:
waking up digital processing circuitry from a hibernation state via the wakeup signal.
14. The method of claim 12 , wherein the re-programmable and/or reconfigurable analog circuit is a reconfigurable Field-Programmable Analog Array (“FPAA”) comprising:
a plurality of computational analog blocks configured to process signals from the sensor network, wherein at least one of the computational analog blocks comprises a spectral analysis stage and at least two of the computational analog blocks are configured to perform parallel processing of signals from the sensor network.
15. A system, comprising:
a sensor network; and
re-programmable and/or reconfigurable analog circuitry configured to monitor data collected by the sensor network, transform the collected data via one or more layers of processing into a space where defined wakeup events are separated from noise and other events, and selectively generate a wakeup signal in response to a defined wakeup event detected by the sensor network indicating that the collected data is associated with a rise in frequency content within a pre-determined band, wherein the defined wakeup event is programmable, after the system is deployed, by receipt of a wireless signal associated with switch and/or bias information.
16. The system of claim 15 , further comprising digital processing circuitry configured to wake up from a hibernation state in response to the wakeup signal.
17. The system of claim 15 , wherein the defined wakeup event is further associated with a presence of speech within a predefined frequency band.
18. The system of claim 15 , wherein the sensor network is configured to detect at least one of audio, vibration and motion.
19. The system of claim 15 , wherein the sensor network comprises a microphone.
20. The system of claim 15 , wherein the sensor network comprises a gyroscope.