KR19990073626A - Cellular telephone apparatus for receive possibility to FM radio - Google Patents

Abstract

The present invention can receive a hands-free mobile phone and personal audio installed in the vehicle to the FM radio of the vehicle using a radio frequency to facilitate the driver's convenience.

Description

Cell phone device that can be received by FM radio {Cellular telephone apparatus for receive possibility to FM radio}

The present invention relates to an FM radio receiving mobile phone device that is capable of receiving a hands-free mobile phone and other personal audio installed in a vehicle by using an FM radio of a vehicle using radio frequency.

Conventional mobile phones use handsfree installed separately in a vehicle to make a call, or when the handsfree is not installed, the driver directly holds the phone in his hand and talks.

In addition, the mini-cassette (100-2) or personal C (100-3) that can be made into earphones can not be mounted in the vehicle, the driver directly manipulates the mini-cassette (100-2) or personal through the earphone by hand operation The contents of the tape or CD mounted on the CDP 100-3 can be heard.

In the conventional mobile phone as described above, the driver has to hold the mobile phone with one hand and operate the switch to talk to the other party, which causes the driver to impede safe driving.

In addition, there is no device that can be simultaneously listened to by people in a vehicle using a personal audio product that can be heard alone, such as a personal cassette or a personal CDP.

The present invention is to provide a device that can solve all the problems occurring in using the mobile phone or mini-cassette and personal CDP as described above.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cellular phone device capable of receiving an FM radio, which allows a telephone call to a cellular phone to be listened to by an FM receiving radio of audio mounted in a vehicle using radio frequency.

In addition, the present invention has another object to receive a signal output from the mini-cassette or personal CDP to the FM radio mounted on the vehicle to allow multiple people to listen together.

The above and other objects of the present invention is a power supply unit for supplying power to each circuit with a stable constant voltage through a DC / DC converter, and an external KEY input unit receives RF (radio frequency) as a VT voltage of the PLL method. To control the clock and date and frequency to be displayed on the LCD display, and to control the message recording unit, and to receive the signal from the external device and transmit the detected signal to the CPU and the audio and data input. The OSC oscillator receives the PLL signal sent from the detector and the CPU controller, changes it to a VT voltage, sends the oscillation frequency back to the CPU controller, and makes an accurate frequency. The FM radio is characterized by performing radio frequency modulation and amplification of the audio signal and data. Is achieved by a mobile phone device which is receivable.

1 is a circuit block diagram of a cellular phone device that can be received by FM radio according to the present invention.

* Description of symbols on the main parts of the drawings *

ANT: antenna 10: power supply

20: DC / DC converter 30: CPU control unit

40: audio and data input detector 50: audio and data input

60: KEY input part 70: PLL V / T control part

80: OSC oscillator 90: LCD display

100: external device 100-1: mobile phone

100-2: Mini Cassette 100-3: Personal CDP

100-4: MP3 100-5: Mobile phone jack output

200: RF output unit 300: message recording unit

310: microphone

The above and other objects, features and effects of the present invention will be more clearly understood by the embodiments described based on the accompanying drawings.

1 is a circuit block diagram of a mobile phone device which can be received by an FM radio according to the present invention.

The power supply unit 10 supplies a DC input power (for example, 1.5V to 12V) to the DC / DC converter 20.

The DC / DC converter 20 may stabilize the power input from the power supply unit 10 and supply power to the circuits of each unit at a constant voltage.

The CPU control unit 30 receives the input of the KEY input unit 60 from the CPU to control the RF oscillation frequency with a voltage age tuning (VT) voltage of the PLL method, and controls the clock and date frequency to be displayed on the LCD display unit 90. The message recording unit 300 and the external message function can be controlled.

Audio and data input detection unit 40 is a mobile phone (100-1), mini-cassette (100-2), personal CD (100-3), MP3 (100-4), mobile phone jack output of the external device 100 The signal detected by the product 100-5 or the like is transmitted to the CPU control unit 30 and the audio and data input 50.

The PLL V / T control unit 70 changes the frequency of the OSC oscillation unit 80 by varying the voltage of 1 to 7.5 V according to the control signal of the CPU control unit 30.

The OSC oscillator 80 receives the PLL signal sent from the CPU of the CPU controller 30 and changes the voltage to a VT (Volt Tuning) voltage to send the oscillation frequency back to the CPU of the CPU controller 30 to oscillate the desired frequency. have.

The LCD display unit 90 may display the data DATA sent from the CPU control unit 30 so that the driver can see the naked eye.

The RF output unit 200 may modulate and amplify an audio signal and data to an FM radio of the vehicle through an antenna ANT.

The message recording unit 300 may store a data value of the microphone 310 and an externally input signal through the VOICE memory IC or the CPU.

Hereinafter, the operation relationship of the present invention will be described.

When the driver driving the vehicle is transmitted to the mobile phone 100-1, which is one of the external devices 100, as the reception signal, the driver operates the KEY input unit 60, and the operation signal of the operated KEY input unit 60. The mobile phone 100-1 signal of the external device 100 is detected by the audio and data input detector 40, and the audio and data input detector 40 detects the detected signal by each CPU controller 30. And audio data input 50.

The CPU control unit 30 controls the PLL V / T control unit 70 to control the RF (radio frequency) oscillation frequency by the PLL VT voltage by the input signal of the audio and data input detection unit 40. The PLL V / T control unit 70 receiving the control signal from the CPU control unit 30 is converted to a voltage of 1 to 7.5V and output to the OSC oscillator 80, and the PLL signal from the PLL V / T control unit 70. The OSC oscillator 80 receives the input variable to the VT voltage to send the oscillation frequency back to the CPU control unit 30 to produce the desired frequency.

Meanwhile, the signal transmitted to the audio and data input 50 is mixed with the oscillation frequency of the OSC oscillator 80 and transmitted to the RF output unit 200.

The RF output unit 200 modulates and amplifies the audio signal and data at a radio frequency and transmits the amplified audio signal to the FM radio of the vehicle through the antenna ANT.

Therefore, the call received by the mobile phone 100-1, which is the external device 200, is received by the FM radio of the vehicle.

In addition, when there is a content to be memorized during the call, if the driver operates the KEY input unit 60, the message to be memorized in the message recording unit 300 is recorded.

As described above, the present invention can receive external devices such as a mobile phone and a personal cassette installed in a vehicle through the FM radio of the vehicle, thereby promoting driver's safe driving, and listening to personal audio simultaneously with other passengers. You can do it.

Claims (1)

Clock, date and frequency by controlling RF (Radio Frequency) with PLL VT voltage by inputting power supply to each circuit with stable constant voltage through DC / DC converter and external key input. CPU control unit to display the LCD on the LCD display and to control the message recording unit, an audio and data input detection unit that receives a signal from an external device, and transmits the detected signal to the CPU and to the audio and data input unit, and a PLL sent by the CPU control unit An OSC oscillator for receiving a signal and varying it to a VT voltage and sending an oscillation frequency back to the CPU control unit to create a desired frequency, and a radio frequency modulated amplification of an audio signal and data.