Patent · US Expired

PCM-to-PWM converter

US7317758B2 · kind B2 · utility

8Cited by

13References

18Claims

0Family size

Assignee

Micronas GmbH · DE

Inventors

Herbert Alrutz · Glückstadt, DE
Dieter Lücking · Glückstadt, DE
Matthias Vierthaler · Denzlingen, DE

Key dates

Filing date	Jul 14, 2004
Grant date	Jan 8, 2008
Priority date	—
Expiry date	Mar 1, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH03M3/506
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

The invention relates to a method and a device for converting a digital, pulse-coded signal (PCM) to a pulse-width-modulated signal (PWM), wherein the digital signal PCM, f(t) is multiplied by at least one derivative (f′(t), f″(t), . . . , f(n) (t)) of the signal (f(t)). The invention also relates to a technique for converting a digital pulse-coded signal (PCM) to a pulse-width-modulated signal (PWM), wherein to obtain a sampling rate sufficient for the pulse-width-modulated signal an oversampling of the digital signal is implemented with a first oversampling factor before the conversion and an second oversampling factor after the conversion, such that the product of the oversampling factors before and after conversion of the digital signal to the pulse-width-modulated signal corresponds at least to the value of the required oversampling factor.

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