Patent ID: 11916575
Assignee: KNOWLES ELECTRONICS, LLC
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 16:
17. A method of operating a sensor assembly comprising a multi-bit delta-sigma analog-to-digital converter (ADC) coupled to a transducer, the method comprising:
generating a digital signal by quantizing a sampled analog electrical signal generated by the transducer;
selecting a subset of digital-to-analog converter (DAC) elements of the ADC for each sample period using a data weighted averaging (DWA) algorithm modified to include a random linear shift of a selected subset of DAC elements;
generating an analog feedback signal using the selected DAC elements; and
subtracting the analog feedback signal from the analog electrical signal prior to inputting a difference signal to the DAC,
wherein noise in the digital signal output by the ADC is shifted outside a frequency band of interest.