APPARATUS AND METHOD FOR REDUCING TDMA NOISE OF PORTABLE TERMINAL
First Claim
1. An apparatus for reducing a Time Division Multiple Access (TDMA) noise of a portable terminal transmitting and receiving a radio frequency signal according to a TDMA scheme, the apparatus comprising:
- an interface unit to which an earphone is electrically connected; and
an audio processing unit including a virtual ground for transmitting and receiving an audio signal to and from the earphone through the interface unit,wherein a ground terminal of the interface unit is electrically connected to the virtual ground of the audio processing unit.
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Accused Products
Abstract
An apparatus and a method for reducing a time division multiple access noise of a portable terminal are provided. The apparatus includes an interface unit to which an earphone is electrically connected, an audio processing unit including a virtual ground for transmitting and receiving an audio signal through the interface unit, a switch unit located electrically between the interface unit and the audio processing unit for electrically connecting a ground terminal of the interface unit with one of a real ground and the virtual ground of the audio processing unit, and a controller for controlling the switch unit to electrically connect the ground terminal of the interface unit with the virtual ground of the audio processing unit when a call function using the earphone is activated, and to electrically connect the ground terminal of the interface unit with the real ground when the call function using the earphone is deactivated.
16 Citations
13 Claims
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1. An apparatus for reducing a Time Division Multiple Access (TDMA) noise of a portable terminal transmitting and receiving a radio frequency signal according to a TDMA scheme, the apparatus comprising:
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an interface unit to which an earphone is electrically connected; and an audio processing unit including a virtual ground for transmitting and receiving an audio signal to and from the earphone through the interface unit, wherein a ground terminal of the interface unit is electrically connected to the virtual ground of the audio processing unit. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for reducing a Time Division Multiple Access (TDMA) noise of a portable terminal transmitting and receiving a radio frequency signal according to a TDMA scheme, the apparatus comprising:
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an interface unit to which an earphone is electrically connected; an audio processing unit including a virtual ground for transmitting and receiving an audio signal to and from the earphone through the interface unit; a switch unit located electrically between the interface unit and the audio processing unit for electrically connecting a ground terminal of the interface unit with one of a real ground and the virtual ground of the audio processing unit; and a controller for controlling the switch unit to electrically connect the ground terminal of the interface unit with the virtual ground of the audio processing unit when a call function using the earphone is activated, and to electrically connect the ground terminal of the interface unit with the real ground when the call function using the earphone is deactivated. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A method for reducing a Time Division Multiple Access (TDMA) noise of a portable terminal transmitting and receiving a radio frequency signal according to a TDMA scheme, the method comprising:
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determining whether a call using an earphone is requested; and electrically connecting a ground terminal of an interface unit to which the earphone is electrically connected to a virtual ground included with an audio processing unit for transmitting and receiving an audio signal to and from the earphone when the call using the earphone is requested. - View Dependent Claims (13)
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Specification