Sigma-delta modulator with reduced switching rate for use in class-D amplification
US6924757B2 · kind B2 · utility
15Cited by
5References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 2004 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | May 21, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/454
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sigma delta modulator includes a modulator module that includes a quantizer with variable hysteresis, which receives an input signal to perform necessary modulation operations. A non-linear mapping module receives a signal associated with said input signal and tabulates the necessary hysteresis control information so as to reduce the transition rate of the modulator module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.