Exercise system with headphone detection circuitry
US9525928B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 2014 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | Oct 1, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/05
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
Described is a circuit arrangement for detection of a tone whose presence indicates insertion of a headphone plug into a jack. The circuit includes a receptacle having contacts configured to receive a plug inserted into the receptacle, a current sense circuit, an amplifier coupled to the current sense circuit and a band pass filter coupled to an output of the amplifier, the band pass filter configured to pass a signal having a frequency in a range of about 2 Hz to 20 Hz. Circuitry converts the passed signal into a digital signal to provide an input signal to a controller to indicate that a headphone plug was inserted into the receptacle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.