Vorrichtung und Verfahren zum Senden und Empfangen von High-Fidelity-Audio unter Verwendung eines einzigen Drahts

Details

Veröffentlichungs-Nr.

EP2461485

Aktenzeichen

EP10015173

Anmeldetag

1. Dezember 2010

Veröffentlichung

31. Juli 2013

Erteilung

31. Juli 2013

Rechtsraum

EP

IPC

H03M3/02H03M3/04H03M5/08H03M5/14H04B14/02

Abstract

An audio device (200) includes first and second ICs (210) and (250) and a substrate (205). The first IC includes a sigma-delta, A/D converter (218) operable to convert an analog signal (234) into a pulse density modulated signal (236). A pulse density width modulator encoder (222) is operable to encode the PDM signal into a PDWM signal (244). The PDWM has short and long pulse widths defining first and second bit levels. The leading edges of each pulse bounds each pulse period. The second IC (250) includes a means (254) to receive the PDWM signal, an edge detector (304) operable to detect the leading pulse edges of the PDWM signal, a time-averaging circuit (308) operable to calculate each pulse period from the leading pulse edges and to generate a sample pulse (120) at or near the midpoint of each pulse period, and a latch (312) operable to sample and hold the PDWM signal at the sample pulse to decode a PDM signal (278). The substrate is operable to support the first and second ICs and to conduct the PDWM signal between the first and second ICs.

Anmelder

Firma

Dialog Semiconductor GmbH

Land

🇩🇪 Deutschland

Fachgebiete