Noise-canceling headphone depletion-mode switch
US9253564B2 · kind B2 · utility
3Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 18, 2013 |
| Grant date | Feb 2, 2016 |
| Priority date | — |
| Expiry date | Feb 17, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This document discusses, among other things, systems and methods including a depletion-mode switch configured to pass an audio signal from an input to an output in a low-impedance state when a power source is below a threshold and to isolate the input from the output in a high-impedance state when the power source is above the threshold and a noise-cancelation circuit configured to receive the audio signal from the input and to provide a modulated audio signal at the output when the power source is above the threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.