US 11,756,565 B2
Analog systems and methods for audio feature extraction and natural language processing
John Gosson, Ottawa (CA); Roger Levinson, San Jose, CA (US); and Niraj Mathur, Oakville (CA)
Assigned to blumind Inc., Ottawa (CA)
Filed by blumind Inc., Ottawa (CA)
Filed on Jan. 25, 2023, as Appl. No. 18/159,162.
Claims priority of provisional application 63/302,618, filed on Jan. 25, 2022.
Prior Publication US 2023/0238014 A1, Jul. 27, 2023
Int. Cl. G06N 3/06 (2006.01); G10L 21/0232 (2013.01); G10L 15/05 (2013.01); G10L 15/16 (2006.01)
CPC G10L 21/0232 (2013.01) [G10L 15/05 (2013.01); G10L 15/16 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An analog signal processing system, comprising:
an analog vibration sensor;
a first analog filter bank for receiving a signal from the vibration sensor, the first filter bank comprising:
a plurality of programmable analog bandpass filters configured for feature extraction, wherein each bandpass filter is a continuous-time bandpass filter comprising:
charge trap transistors as programmable elements for tuning corner frequencies of the bandpass filter; and
at least one analog neural network configured to receive extracted features from the first filter bank and classify the extracted features.