Audio interface circuits and methods
US9685916B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2015 |
| Grant date | Jun 20, 2017 |
| Priority date | — |
| Expiry date | Dec 2, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, an electronic device includes an audio connector port comprising a ground terminal and one or more audio output terminals, a first audio amplifier coupled to one of the audio output terminals, and a multiplexer having an output terminal coupled to the input terminal of the first audio amplifier. Sense circuits inside the electronic device may be alternately coupled through the multiplexer and first audio amplifier so that, in a first mode of operation, the multiplexer couples the audio signal to the first audio output terminal, and in a second mode of operation, the multiplexer couples an analog voltage corresponding to an internally sensed value to the first audio output terminal. Use of the audio connector and audio circuitry to access internal electrical parameters may facilitate testing and analysis of internal systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.