Concept and method to enable filterless, efficient operation of Class-D amplifiers
US6262632A · kind A · utility
34Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Nov 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/384
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Class-D switching amplifier (30, 40) having a ternary mode of operation. Signal processing (21, 22) is provided to eliminate the potential of crosstalk within one channel by introducing a time delay into the system. A susceptible crosstalk point is moved away from a zero-crossing point to a higher power level, which is advantageous in low-end audio applications. A time delay is introduced to one ramp signal (RAMPB) in the first implementation (30), and an in-sync generator (42) is utilized in another implementation (40) using offset switching in the comparitors (40, 42) to create the time delay (.DELTA.t).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.