Detection circuit

Details Detection circuit Detection circuit

2007-07-24

2007-07-24

Pendleton, Brian Tyrone (Department: 2615)

Electrical audio signal processing systems and devices

Headphone circuits

Reexamination Certificate

active

10629863

ABSTRACT:
A plug detection circuit. The detected circuit is disposed in an electronics device with an earphone jack, accepting plugs with a plurality of conductive rings. The detection circuit has a plurality of pins, wherein a first pin detects, and outputs a first logic potential, and a second pin detects the potentials at the conductive rings and outputs a second logic potential. The detection circuit determines the type of earphone connected to the earphone jack.

REFERENCES:
patent: 6069960 (2000-05-01), Mizukami et al.
patent: 6397087 (2002-05-01), Kim et al.
patent: 6856046 (2005-02-01), Scarlett et al.
patent: 6891942 (2005-05-01), Porter et al.
patent: 6922572 (2005-07-01), Lim

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