Description of Related Art A conventional wireless transceiver is restrictively used to listen to a MP3 or a portable audio equipment. In case of using infrared rays, due to obstacles, the conventional wireless transceiver fails to operate well even at a close range.

SUMMARY OF THE INVENTION To overcome the problems described above, it is an object of the present invention to provide a wireless transceiver which can operate well at a close range without any restriction.

It is another object of the present invention to provide a wireless transceiver which is excellent in compatibility with various audio equipments.

In order to achieve the above object, the preferred embodiments of the present invention provide a wireless transceiver, comprising: a transmitter receiving an externally applied audio signal and outputting the audio signal wirelessly through a predetermined processing; and a receiver receiving the wireless audio signal from the transmitter and reproducing the wireless audio signal through a predetermined processing.

The transmitter includes a mixer portion receiving and mixing the analog audio signal and a frequency modulation signal and outputtings a mixed signal ; a crystal oscillating portion receiving the mixed signal from the mixer portion and outputting a highly stable oscillating frequency using a piezoelectric effect of a crystal ; a distributor obtaining an integer multiple of frequency from a high frequency that is an output of the crystal oscillating portion; and an amplifying portion amplifying a signal output from the distributor and outputting externally an amplified signal through an antenna.

The receiver includes a low noise amplifier receiving the wireless signal input through an antenna and amplifies the wireless signal to a low noise signal ; a voltage control oscillator oscillating a super high frequency of a desired frequency by varying a voltage ; an amplifying portion receiving an output signal of the voltage control oscillator and amplifting the output signal of the voltage control oscillator to a signal of a predetermined magnitude; a mixer portion receiving and mixing an output of the low noise amplifier and an output of the amplifying portion and outputting a mixed signal ; an intermediate frequency processing portion processing a signal output from the mixer portion to an intermediate frequency of a certain frequency; and an intermediate frequency amplifying portion amplifying a signal output from the intermediate frequency processing portion and outputting an amplified signal to an audio output means.

The transceiver further includes power supplys supplying an electrical power to the transmitter and the receiver, respectively.

The power supply for use in the receiver includes a charge battery in which a power supplied from a current supply source is charged by a charge circuit; and a switch supplying a power to the receiver or maintaining a charging operation of the charge battery.

The power supply for use in the transmitter includes a charge battery in which a power supplied from a current supply source is charged by a charge circuit ; a switch supplying a power to the receiver or maintaining a charging operation of the charge battery; and an indicator indicating whether a power is smoothly supplied to the transmitter or not. The indicator is a LED.

The transmitter is connected to a mobile phone via an ear phone. The ear phone includes a cord having a predetermined length ; first and second jacks connected to one end of the cord; an ear piece connected to the other end of the cord ; and a microphone receiving a voice of a user and intputting it the mobile phone, wherein one of the first and second jacks is connected to the mobile phone, and the other is connected to the transmitter.

A voice signal output from the mobile phone is transmitted to the transmitter in response to a first control signal, and is transmitted to the ear piece in response to a second control signal. The ear phone further includes a selecting switch generating the first and second control signals. The receiver is a FM radio.

BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the present invention and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which like reference numerals denote like parts, and in which: FIG. 1 is a block diagram illustrating a transmitter of a wireless transceiver according to the present invention; FIG. 2 is a block diagram illustrating a receiver of the wireless transceiver according to the present invention; FIG. 3A is a block diagrams illustrating a power supply of the receiver 200 according to the present invention; FIGs. 3B is a block diagrams illustrating a power supply of the transmitter 100 according to the present invention ; FIG. 4 shows a state wherein the wireless transceiver according to the present invention is connected to various devices ; FIG. 5 shows an exemplary application of the wireless transceiver according to the present invention ; and FIG. 6 is a perspective view illustrating an earphone of FIG. 5.

DETAILED DESCRIPTION OF PREFFERED EMBODIMENTS Reference will now be made in detail to preferred embodiments of the present invention, example of which is illustrated in the accompanying drawings.

Turning now to the drawings, FIG. 1 is a block diagram illustrating a transmitter of a wireless transceiver according to the present invention.

The transmitter 100 includes a mixer portion 120, a crystal oscillating portion 130, a distributor 140, and an amplifying portion 150. The mixer portion 120 receives an analog audio signal input externally and a frequency modulation signal of a FM modulating portion 110, and mixes and outputs them.

The crystal oscillating portion 130 receives an output of the mixer portion 120 and outputs a highly stable oscillating frequency using a piezoelectric effect of a crystal. The distributor 140 obtains an integer multiple of frequency from a high frequency that is an output of the crystal oscillating portion. The amplifying portion 150 amplifies a signal output from the distributor 140 and externally output the amplified signal through an antenna 160.

FIG. 2 is a block diagram illustrating a receiver of the wireless transceiver according to the present invention.

The receiver 200 includes a low noise amplifier 220, a voltage control oscillator 230, an amplifying portion 240, a mixer portion 250, an intermediate frequency processing portion 260, and an intermediate frequency amplifying portion 270. The low noise amplifier 220 receives a wireless signal input through an antenna 210 and amplifies it to a low noise signal. The voltage control oscillator 230 oscillates a super high frequency of a desired frequency by varying a voltage. The amplifying portion 240 receives an output signal of the voltage control oscillator 230 and amplifies it to a signal of a predetermined magnitude. The mixer portion 250 receives an output of the low noise amplifier 220 and an output of the amplifying portion 240 and mixes and outputs them.

The intermediate frequency processing portion 260 processes a signal output from the mixer portion 250 to an intermediate frequency of a certain frequency.

The intermediate frequency amplifying portion 270 amplifies a signal output from the intermediate frequency processing portion 260 and outputs it to an audio output means 280 such as a speaker or an earphone.

Operation of the wireless transceiver according to the present invention is described below.

The mixer portion mixes an analog signal with the FM signal and output a mixed signal. The mixed signal is output to the crystal oscillating portion 130, the distributor 140, and the amplifying portion 150 and then transmitted to the receiver 200 through the antenna 160.

The receiver 200 receives the wireless signal transmitted from the transmitter 100 through the antenna 210. The received wireless signal is amplified to a low noise signal by the low noise amplifier 220 and passes through the voltage control oscillator 230 which oscillates a super high frequency of a desired frequency. The signal passing through the voltage control oscillator 230 is amplified to a signal of a predetermined magnitude by the amplifying portion 240. The mixer portion 250 receives an output of the low noise amplifier 220 and an output of the amplifying portion 240 and mixes and outputs them. The intermediate frequency processing portion 260 processes a signal output from the mixer portion 250 to an intermediate frequency of a predetermined frequency. The intermediate frequency amplifying portion 270 amplifies an output signal of the intermediate frequency processing portion 260 and outputs it through the audio output means 280, thereby reproducing an original sound.

FIG. 3A is a block diagrams illustrating a power supply of the receiver 200 according to the present invention.

Referring to FIG. 3A, the power supply 300 includes a charge battery 330 in which a power supplied from a current supply source is charged by a charge circuit 310, and a switch 320 which supplies a power to the receiver 200 when turned on and maintains a charging operation of the charge battery 330 when turned off.

FIGs. 3B is a block diagrams illustrating a power supply of the transmitter 100 according to the present invention.

Referring to FIG. 3B, in addition of a configuration of the power supply 300 of the receiver 200, the power supply 300 of the transmitter 100 further includes a LED indicator LED which indicates whether a power is smoothly supplied to the transmitter 100 or not.

Meanwhile, a de-jack or a USB port can be used as a current supply source. The inventive wireless transceiver has various charging methods, and thus it is very convenient to use.

FIG. 4 shows a state wherein the wireless transceiver according to the present invention is connected to various devices. Referring to FIG. 4, the transmitter 100 is connected to a portable MP3 player, a compact disk player (CDP), a personal digital assistant (PDA), a mobile phone, and a computer, and so on, via a connection means such as a jack. The receiver 200 is connected to an earphone, an audio, and other sound reproducing apparatuses.

When the sound reproducing apparatus includes a tuner, the tuber is synchronous with a transmitting frequency of the transmitter 100, and thus a separate additional receiver is not required.

FIG. 5 shows an exemplary application of the wireless transceiver according to the present invention.

Referring to FIG. 5, the wires transceiver is connected to a mobile phone 50 through an earphone 500. A voice signal output from the mobile phone 50 is transmitted to the transmitter 100 through the ear phone 500, and the transmitter 100 transmits wirelessly the voice signal to the receiver 200. The voice signal received by the receiver 200 is output through a voice output means such as a speaker 60.

FIG. 6 is a perspective view illustrating the earphone 500 of FIG. 5.

Referring to FIG. 5, the earphone includes a cord 502 having a predetermined length, first and second jacks 504a and 504b connected to one end of the cord 502, an ear piece 506 connected to the other end of the cord 502, and a microphone 508 connected between the first and second jacks 504a and 504b and the ear piece 506. A clip 510 used to attach the earphone to a user hangs on the cord 502.

The earphone of FIG. 6 further includes a selecting switch 520. When the selecting switch 520 goes to a wireless call mode, a voice signal output from the mobile phone 50 via the first jack 504a is bypassed to the second jack 504b.

The bypassed voice signal is transmitted to the transmitter 100. The microphone 508 receives a voice of the user and inputs it to the mobile phone 50, so that the user can speak over the telephone.

When a protruding portion 522 of the selecting switch 520 goes to a common call mode, a voice signal output from the wireless terminal through the first jack 504a is transmitted to the ear piece 506.

In greater detail, when a user pushes a call button of a wireless terminal 60 to answer a telephone call, a voice signal output from the mobile phone 50 is transmitted to both the ear piece 506 and the second jack 504b through the first jack 504a simultaneously. The transmitter 100 receives the voice signal output from the mobile phone 50 through the second jack 504b connected to a voice input terminal thereof. The transmitter 100 wirelessly transmits the voice signal through a predetermined process described above. The receiver 200 receives the wireless voice signal and demodulates it, so that the voice signal is output through the speaker 60.

Here, a FM radio for a vehicle can be used as the receiver 200. In this case, when the user selects the same frequency as one of carrier frequencies of the wireless voice signal transmitted from the transmitter 100, the user can listen to the telephone call.

Meanwhile, the user can speak over the telephone using the microphone 508. When the second jack 504b is not connected to the transmitter 100, the user can listen to the telephone using the ear piece 506.

As described above, the wireless transceiver according to the present invention transmits and receives a signal using a wireless signal and thus is not affected by obstacles. In addition, the inventive wireless transceiver uses a charge battery and thus needs not to replace a battery. Further, the inventive wireless transceiver has various charging channels and thus is very convenient to use.

While the invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing and other changes in form and details may be made therein without departing from the spirit and scope of the invention.