Patent · US Active

Digital controller for automatic rate detection and tracking of audio interface clocks

US8433027B2 · kind B2 · utility

2Cited by

4References

13Claims

0Family size

Assignee

DIALOG SEMICONDUCTOR INC. · DE

Inventors

Paul Hammond · West Kirby, GB
David Eke · Dalkeith, GB

Key dates

Filing date	Nov 30, 2009
Grant date	Apr 30, 2013
Priority date	—
Expiry date	Dec 10, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH03L7/095
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

Systems and methods to achieve a digital audio interface having automatic rate detection and tracking of digital audio streams have been achieved. The system comprises a digital controller working in conjunction with an analog phase-locked loop (PLL). It removes the need to know or communicate in advance the rate at which the interface will be operating, so allowing asynchronous switching between different audio streams. The digital controller acts as a phase-lock loop by modifying the feedback divide ratio of the PLL in order to minimize the phase error between the device clock and an arbitrary audio interface clock.

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