Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
1999-06-11
2001-10-09
Trost, William (Department: 2683)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S566000, C455S550100, C455S575100, C455S090300, C455S345000, C455S346000, C379S420010, C379S449000, C379S433020
Reexamination Certificate
active
06301491
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates generally to a radio terminal and in particular, to a hands-free device for a radio terminal and method for implementing a hands-free function to the radio terminal.
2. Description of the Related Art
In order to implement a hands-free function to a radio terminal, a hands-free device is required. The hands-free device is generally more expensive than the radio terminal, due to competition among manufacturers of radio terminals. Therefore, if a user desires to implement a hands-free function to the radio terminal, a cost is incurred in purchasing a conventional hands-free device.
Accordingly, a need exists for a device and method for implementing a hands-free function to a radio terminal which is manageable and inexpensive.
SUMMARY
According to a preferred embodiment of the present invention, a hands-free device and method are provided for implementing a hands-free function to a radio terminal. The hands-free device includes an amplifier for amplifying voice signals received from a microphone; a switching unit for switching the amplified voice signals to a speaker or to an earphone terminal; a controller for controlling the amplifier to amplify the voice signals received from the microphone by a predetermined value and for controlling the switching unit to output the amplified voice signals via the earphone terminal if the controller determines that the hands-free function has been selected; and an external voice output unit having an input terminal connected to the earphone terminal for receiving the amplified voice signals and a voice output speaker for outputting the amplified voice signals.
The method for implementing a hands-free function to the radio terminal includes the steps of checking whether the hands-free function has been selected; controlling the switching unit to switch the amplified voice signals to the earphone terminal if the hands-free function has been selected; and outputting the amplified voice signals through the earphone terminal. The method further includes the steps of receiving voice signals through the microphone; and controlling the amplifier to amplify the voice signals received through the microphone by a predetermined value.
REFERENCES:
patent: 4930156 (1990-05-01), Norris
patent: 5487182 (1996-01-01), Hansson
patent: 6081724 (2000-06-01), Wilson
patent: 6122369 (2000-09-01), Hwang et al.
patent: 6131042 (2000-10-01), Lee et al.
patent: 6134456 (2000-10-01), Chen
Dilworth & Barrese LLP
Ferguson Keith
Samsung Electronics Co,. Ltd.
Trost William
LandOfFree
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