Hands-free signal processing device in a mobile...

Details Hands-free signal processing device in a mobile... Hands-free signal processing device in a mobile...

2007-09-11

2007-09-11

Urban, Edward F. (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S575200, C381S074000, C381S375000

Reexamination Certificate

active

10973906

ABSTRACT:
Disclosed is a hands-free signal processing device in a mobile communication terminal. More particularly, disclosed is a hands-free signal processing device in a mobile communication terminal, which may separate hands-free signals, such as a microphone signal and an interrupt signal generated in a hands-free device, by using transistors, and properly process the hands-free signals.According to the present invention, current consumption caused by a hands-free device can be minimized by converting AUX_MIC signal into pulse and by using the pulse as a reference pulse of the hands-free device.Further, a talk-key interrupt signal of a hands-free device can be correctly detected while incoming/outgoing calls are connected. Thus, a problem in timing can be solved and a proper reaction to the talk-key interrupt signal of a hands-free device can be achieved.

REFERENCES:
patent: 3766318 (1973-10-01), Webb
patent: 6058319 (2000-05-01), Sadler
patent: 6122369 (2000-09-01), Hwang et al.
patent: 6397087 (2002-05-01), Kim et al.
patent: 2004/0116159 (2004-06-01), Cheng

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