Switching in amplifier with configurable final output stage
US10008992B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2017 |
| Grant date | Jun 26, 2018 |
| Priority date | — |
| Expiry date | Apr 14, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/432
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier may include a final output stage switchable among a plurality of modes comprising a mode which is enabled by coupling an output driver to an output of the final output stage and a preconditioning circuit coupled to the output of the final output stage. The preconditioning circuit may be configured to precondition at least one of a voltage and a current of the output of the final output stage prior to coupling the output driver to the output of the final output stage to limit audio artifacts caused by switching the final output stage to the mode or may be configured to perform a switching sequence to switch between a first mode and a second mode of the plurality of modes, such that at all points of the switching sequence, output terminals of the output of the final output stage have a known impedance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.