Audio jack detection circuit
US9591421B2 · kind B2 · utility
5Cited by
22References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2012 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Aug 8, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This document discusses, among other things, a detection system configured to identify a type of a pole of a four-pole audio jack using first and second comparators. The detection system can include a bias circuit configured to bias a detection input coupled to the pole, and first and second comparators configured to compare the detection input to respective first and second thresholds to provide an indication of the type of the pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.