Method and apparatus for generating a pulse width modulated signal
US6606044B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 2002 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Jan 2, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/822
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for a pulse width modulated (PWM) signal (30, 130) is provided. The input is a digital signal which is a modulated signal (24, 124). In the illustrated form, the modulated input signal is either a PDM signal or a PCM signal. In one embodiment of the present invention a PCM to PWM converter (16, 116) includes correction of duty ratio circuitry (48). The methodology used may include recursion on the values obtained after prediction, interpolation, and correction. The digital to analog conversion system (10) uses a PDM to PWM converter (20) which operates in an all digital domain and includes no analog circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.