Current vectoring to electroacoustic output transducers having multiple voice coils
US11102583B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2020 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Mar 25, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2209/041
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio power output circuit provides a pair of output signals to an audio output transducer that has two different voice coils. Using a measured or predicted position of the voice coil assembly with respect to the transducer's magnetic field, a processing circuit generates the pair of signals such that a first relationship between a first one of the pair of output signals and an audio input signal and a second relationship between a second one of the pair of the output signals vary with the position of the voice coil. Offset in the Dynamic Mean Position (DMP) can be compensated for without adding low frequency or direct current components that compromise the dynamic range of the transducer. The efficiency, acoustic output power and/or linearity of the acoustic output of the transducer may be optimized by tailoring the first and second relationship to a particular target performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.