Digital silicon microphone with interpolation

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 couple...

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Bibliographische Detailangaben
Hauptverfasser:	Straeussnigg, Dietmar, Bach, Elmar, Valli, Luca
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CODE CONVERSION IN GENERAL CODING DEAF-AID SETS DECODING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS RESONATORS
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Beschreibung
Zusammenfassung:	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.