Headset detector in a device generating audio signals
US7450726B2 · kind B2 · utility
33Cited by
2References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2004 |
| Grant date | Nov 11, 2008 |
| Priority date | — |
| Expiry date | Apr 11, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A detector circuit detects whether a headset is present (inserted) in a jack by measuring the impedance between the connection points of the jack. The detector circuit further determines the headset type (e.g., whether of cellular headset, stereo headset or stereo+cellular headset) by measuring the impedance between the connection points of the jack. Power consumption may be reduced by powering down components which determine headset type if the headset is determined not to be present. Additional power reduction is attained by checking for headset removal only periodically if the headset is determined to be present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.