Patent · US Active

Accessory detection circuit with improved functionality

US9060228B2 · kind B2 · utility

8Cited by

5References

23Claims

0Family size

Assignee

FAIRCHILD SEMICONDUCTOR CORPORATION · US

Inventors

Tony Cheng Han Lee · South Portland, US
Shawn Barden · Gorham, US
Seth M. Prentice · Auburn, US

Key dates

Filing date	Jun 11, 2013
Grant date	Jun 16, 2015
Priority date	—
Expiry date	Jun 11, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2499/11
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An apparatus comprises a first connector, a second connector, a detection circuit and a logic circuit. The first connector and the second connector are configured for electrical communication with first and second conducting terminals, respectively, of an audio jack plug. The detection circuit is configured to apply a first value of current to the first connector, and apply a second value of current to the second connector. The logic circuit is configured to generate an indication that the audio jack plug is fully inserted according to a logic level detected at the second connector when electrical ground is detected at the first connector.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.