Patent · US Active

Digital silicon microphone with interpolation

US10348326B2 · kind B2 · utility

2Cited by

4References

17Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Elmar Bach · Villach, AT
Dietmar Straeussnigg · Villach, AT
Luca Valli · Villach, AT

Key dates

Filing date	Oct 23, 2017
Grant date	Jul 9, 2019
Priority date	—
Expiry date	Oct 23, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2201/003
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

In accordance with an embodiment, a digital microphone interface circuit includes a delta-sigma analog-to-digital converter (ADC) having an input configured to be coupled to a microphone, a digital lowpass filter coupled to an output of the delta-sigma ADC, and a digital sigma-delta modulator coupled to an output of the digital lowpass filter. The delta-sigma ADC, the digital lowpass filter, and the digital sigma-delta modulator are configured to operate at different sampling frequencies.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.