Multi-edge pulse width modulator with non-stationary residue assignment
US8306106B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2010 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | May 14, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/217
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An improved method for generating pulse width modulated signals, e.g., for use in audio amplifiers, power amplifiers, etc. An input digital value is received and divided by a number N, producing a quotient and a residue. A plurality N of edge modulation values may then be generated based on the quotient and the residue. Each of the N edge modulation values specifies an edge of the pulse width modulated signal to be generated. Generation of the N edge modulation values may comprise applying the residue to one or more of the N edge modulation values when the residue is greater than zero. The residue may be applied to different ones of the plurality N of edge modulation values during different iterations of the method in a non-stationary fashion. The pulse width modulated signal may then be generated based on the N edge modulation values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.