KR100724223B1 - Mobile phone to be used as wireless phone as well and transmission/receipt method thereby - Google Patents

Abstract

A mobile terminal that can be used as a wireless telephone according to the present invention includes a first switching switch for switching a received signal according to a setting mode of a current mobile terminal after a signal received through an antenna is amplified / filtered / frequency converted; A reception baseband converter for converting a received signal to a baseband when the setting mode of the first switching switch is a mobile terminal, a control unit for reproducing a voice signal from the received signal through the reception baseband converter, and An intermediate frequency band filter for filtering a received signal when the setting mode of the first switching switch is a wireless telephone, an FM signal processor for reproducing voice from the received signal filtered by the intermediate frequency band filter, and the first switching Simultaneous operation with the setting mode of the switch and the control according to the transmission mode And a second switching switch configured to be switched from the FM signal processor to receive a transmission signal, and then to amplify / filter / convert the frequency and transmit the same through an antenna.

As described above, the present invention can be used as a mobile terminal outside the home, and the mobile terminal can also be used as a wireless telephone in the home, so that it is not necessary to separately provide a mobile terminal and a wireless telephone, which had to be separately provided. In addition, the economic burden is reduced, and as a user, there is an advantage that the desired function can be obtained with one device without using each wireless device separately.

Mobile terminal, changeover switch

Description

Mobile phone to be used as wireless phone as well and transmission / receipt method hence}

1 is a schematic circuit diagram of a high frequency part of a conventional mobile terminal.

2 is a schematic circuit diagram of a conventional radio telephone high frequency unit.

3 is a circuit diagram of a mobile terminal that can be used as a wireless telephone according to the present invention.

4 is a flowchart illustrating a receiving method of a mobile terminal according to the present invention.

5 is a flowchart illustrating a method of transmitting a mobile terminal according to the present invention.

<Description of the symbols for the main parts of the drawings>

308: first switch

307: second switch

The present invention is a mobile terminal that can be used as a wireless telephone used simultaneously with a landline telephone at home as a single mobile terminal, more specifically, in the conventional home, a wireless telephone is provided with a wireless device in its own landline telephone that comes in a wired manner. The mobile terminal can be used at the same time, and the mobile terminal can be carried by the subscriber at the same time. The mobile phone can be used as a cordless phone that can be satisfied with the functions of the mobile phone and the mobile terminal. It relates to a terminal.

Conventional landline telephones can make telephone calls by connecting a landline telephone to a wireline telephone network connected to each home in a telephone company, and furthermore, to provide a separate wireless device to a landline telephone, and to transmit and receive such wireless telephones. By separately providing a wired telephone network could be used as a cordless phone within a preset spatial range.

In addition, a mobile terminal that is connected to the base station and wirelessly is used separately from the wireless telephone, so that the subscriber of the mobile terminal can make a call anywhere regardless of the place.

1 is a schematic circuit diagram of a conventional high frequency unit of a mobile terminal.

Referring to FIG. 1, a high frequency unit of a mobile terminal is roughly divided into a receiver and a transmitter, and the receiver includes an antenna 101 for transmitting and receiving a radio signal and a handset switch 102 for distinguishing the transmitter and the receiver from the transmitter. A low noise amplifier 114 and a high frequency band filter 113 for amplifying and filtering a signal received through the transceiver 102, a receiving frequency converter 112 for converting a high frequency into an intermediate frequency, A phase locked loop for maintaining a phase difference between the voltage controlled oscillator 115 and the received signal by using a feedback control and a voltage controlled oscillator 115 for phase matching in the reception frequency converter 112 116, an intermediate frequency band filter 111 for filtering the received signal converted to the intermediate frequency, and a receiving baseband converter for converting the received signal to baseband And a control unit 109 for demodulating the received signal converted into baseband.

In addition, the transmission unit is an intermediate frequency converter 108, the control unit 109 is used to convert the modulated transmission signal to an intermediate frequency, an intermediate frequency band filter 107 for filtering the intermediate frequency, and the voltage controlled oscillator A transmission frequency converter 106 for converting an intermediate frequency into a high frequency, a driver amplifier 105 for amplifying a transmission signal, and a filter for filtering the amplified transmission signal. A high frequency band filter 104 and a power amplifier 103 for amplifying are provided.

On the other hand, Figure 2 is a schematic circuit diagram of a conventional radio telephone high frequency unit.

Referring to FIG. 2, the radio frequency unit of the wireless telephone is also divided into a receiver for transmitting a wireless signal and a transmitter for transmitting. The receiver includes an antenna 201, a handset switch 213 for separating transmitted and received signals, and a received high frequency. The high frequency band filter 210 allows the signal to be filtered, the low noise amplifier 209 for amplifying the received signal, the phase locked loop 211 and the received voltage controlled oscillator 212, and the phase is adjusted by the intermediate frequency. And a receiving frequency converter 208 for lowering the signal frequency, an intermediate frequency amplifier 207 for amplifying the intermediate frequency, and a demodulation circuit 206 for demodulating the received signal. In addition, the transmitting unit includes a modulation circuit 205 for modulating a transmission signal, such as a voice signal, into a signal suitable for transmission, a transmission voltage controlled oscillator 204 for phase shifting and frequency conversion by the phase lock loop 211; And a high power amplifier 203 for amplifying and a high frequency band filter 202 for filtering. On the other hand, in the wireless telephone, a frequency modulation method is applied as a modulation / demodulation method, which is different from a mobile terminal.

The wireless phone and the mobile terminal to which the high frequency unit having such a configuration are applied use different frequencies (800 MHz for the mobile terminal and 900 MHz for the mobile phone), and thus cannot be used in the same way. It is necessary to carry a mobile terminal at home and use the mobile terminal while at home, but when using a landline telephone, a cordless telephone must be used separately. This is because two wireless devices having similar configurations are separated. It is economically wasteful to provide, and there is a problem that each user must use each wireless device separately.

The present invention has been created to solve this problem, and can be applied to the functions of the wireless telephone and the mobile terminal as a single wireless device, and thus can be used as a wireless telephone that can eliminate the economic burden and inconvenience of the user. It is an object to provide a mobile terminal capable of doing so.

In order to achieve the above object, a mobile terminal that can be used as a wireless telephone according to the present invention is configured to switch the received signal according to the current mobile terminal setting mode after the signal received through the antenna is amplified / filtered / frequency-converted. A first switching switch, a receiving baseband converter for converting a received signal to a baseband when the setting mode of the first switching switch is a mobile terminal, and a voice signal to be reproduced in a received signal through the receiving baseband converter A control unit for performing the operation, an intermediate frequency band filter for filtering a received signal when the setting mode of the first switching switch is a wireless telephone, and an FM signal processing unit for reproducing voice from the received signal filtered by the intermediate frequency band filter. And simultaneously with the setting mode of the first switching switch. According to said transmission mode is switched from the control unit and the FM signal processing unit characterized by comprising contains a second change-over switch for transmitting via the antenna after sending receiving amplifier / filter / frequency convert them to transmission signal

In addition, the receiving method of the mobile terminal capable of using a wireless telephone according to the present invention includes the steps of receiving a wireless signal through an antenna; Allowing a received signal to be separated from the wireless signal through a handset switcher; Amplifying / filtering / frequency converting the received signal; Switching the received signal according to a determination of a setting mode (mobile terminal or wireless telephone) of a mobile terminal; And when the setting mode is a mobile terminal, is converted into a baseband to be reproduced as voice, and when the setting mode is a wireless telephone, it is filtered and then reproduced as voice.

On the other hand, a transmission method of a mobile terminal that can be used as a wireless telephone according to the present invention comprises the steps of inputting a transmission signal; Determining a setting mode (mobile terminal or wireless telephone) of the current mobile terminal so that the transmission signal is properly transmitted; Inputting a transmission signal by switching from a control unit when the setting mode of the mobile terminal is a mobile terminal and an FM signal processing unit in the case of a wireless telephone; Amplifying / filtering / frequency converting the transmission signal to be propagated to the air; And propagating the transmission signal to the air through a transceiver and an antenna.

As described above, a mobile terminal that can be used as a wireless telephone according to the present invention has a configuration in which both frequency bands can be used and a modulation / demodulation method can be applied differently. An example will be described in detail with reference to the drawings.

In addition, in describing the structure of this invention, the detailed description is abbreviate | omitted about the part which is conventionally well-known.

3 is a diagram schematically illustrating a circuit diagram of a mobile terminal that can be used as a wireless telephone according to the present invention.

Referring to FIG. 3, the configuration of the present embodiment includes an antenna 301 for transmitting and receiving a high frequency signal, and the overall configuration includes a receiver and a transmitter. Referring to the configuration of the receiver, the antenna 301 is described. A handset 302 for distinguishing a received signal inputted from the transmission signal, a low noise amplifier 311 for amplifying a high frequency signal received through the handset 302, and for filtering the received high frequency Receiving frequency converter for converting the high frequency band filter 310 and the signal from the voltage controlled oscillator 312 into a phase locked loop 313 so that the received high frequency is converted into an intermediate frequency in phase alignment. 309 and a first switching switch 308 installed so that a separate demodulation scheme is applied according to a specific frequency and a modulation / demodulation scheme of a reception frequency. The transmitter includes a second switching switch 307 for differently inputting a differently modulated signal according to a frequency and a modulation / demodulation scheme, and a signal from the voltage controlled oscillator 312 is controlled in a phase locked loop 313. High frequency band through which the transmission frequency converter 306 for converting the transmission intermediate frequency into high frequency in the phase-aligned state, the driver amplifier 305 for amplification, and the high frequency through the driver amplifier 305 are filtered out. Filter 304 and a power amplifier 303 for increasing the output.

Meanwhile, the first switching switch 308 and the second switching switch 307 are controlled at different parts according to the frequency of each input signal and the modulated / demodulated method, and the signal input through the receiver is moved. If the signal of the 800MHz band used in the terminal, the received signal is switched to the control unit 314 through the first switching switch 308, the signal of the mobile terminal enters the control unit 314, the modulation / demodulation operation can be performed. The reception baseband converter 314a is essentially provided in front of the control unit 314 so that an intermediate frequency can be converted into a baseband signal, and the reception baseband converter 314a is converted into a baseband reception. The signal is demodulated by the control unit 314 and reproduced as a voice signal so that the user can hear it.

However, if the signal input through the receiver is a signal of the 900MHz band used in the wireless telephone, filtering before the received signal input through the first switching switch 308 enters the FM signal processor 315 to be used in the wireless telephone. An intermediate frequency band filter 315a is provided, and after being filtered by the intermediate frequency band filter 315a, the FM signal processing unit is configured to be demodulated according to a frequency modulation method, which is a modulation / demodulation method used in a wireless telephone. Demodulation is performed at 315.

In addition, the second switching switch 307 is to be specified in advance according to the type of the input signal, if the state is used as a wireless telephone to be connected to the FM signal processing unit 315, if the state is used as a mobile terminal control unit 314 to accept different input signals according to their respective usage conditions. In addition, all the components applied to the same configuration as the present invention depend on the frequencies used in the wireless telephone and the mobile terminal, and the components must be provided to withstand the bands of 800 MHz and 900 MHz in order to be applicable to both of these frequencies. do.

Eventually, the first switching switch 308 and the second switching switch 307 are provided so that the desired mode can be selected so that the use of the mobile terminal can be adjusted.

The first switching switch 308 and the second switching switch 307 are set by the user in advance so as to vary according to the state in which the mobile terminal is used, which is an option included in the menu configuration on the screen of the mobile terminal, By setting a physical button on the terminal to move according to the user's arbitrary it can be set in advance.

When the user sets the function of the wireless telephone by using a menu configuration or a button on the screen of the mobile terminal, the first switching switch 308 and the second switching switch 307 inside the mobile terminal are respectively the FM signal processor. If it is switched to 315 and is set as a mobile terminal, the first switching switch 308 and the second switching switch 307 inside the mobile terminal are respectively switched to the control unit 314 to perform a function as the original mobile terminal. do.

The transmission and reception method of the mobile terminal described above is as follows.

4 is a diagram illustrating a receiving method of a mobile terminal according to the present invention.

Referring to FIG. 4, when a wireless signal is received through an antenna, regardless of a wireless signal of a wireless telephone or a wireless signal of a mobile terminal, the wireless signal is received through one antenna (S410) and separated into a received signal through a handset switcher (S410). S420, the received wireless signal is amplified and filtered (S430).

In addition, the amplified and filtered received signal undergoes a different process according to the current setting mode of the mobile terminal. The setting mode is previously set in the mobile terminal through various methods (S440).                     

If the current setting mode of the mobile terminal is a mobile terminal, it is switched by the first switching switch (see 308 in FIG. 3) to be converted to the base band (S 460), and reproduced as a voice signal through the control unit (S 480). If the setting mode of the mobile terminal is a wireless telephone, after filtering (S450), the voice is reproduced through the FM signal processing unit to match the received signal of the wireless telephone (S470).

5 is a diagram illustrating a method for transmitting a mobile terminal according to the present invention.

Referring to FIG. 5, after the subscriber's voice signal is input (S 500), the user is transmitted through different paths according to the mode of the mobile terminal. The setting mode is set in advance and the second switching switch (FIG. Adjustment is made by switching of the reference (see 307) (S 510).

If the current mobile terminal is configured as a mobile terminal, the controller receives an input from the control unit to be suitable for the wireless signal of the mobile terminal according to the setting of the second switching switch (S530). Receive a transmission signal through (S520).

As described above, after different transmission signals are input according to the setting of the mobile terminal, the same process is performed. The process is amplified and filtered to be suitable for the transmission of a wireless signal (S540). It is to be propagated to the air through (S550).

On the other hand, in order to make the mobile terminal device and the method of use as described above more convenient, periodically check the radio signal from the wired device of the landline telephone that is prepared in advance in accordance with the location where the mobile terminal is moved When a signal originating from the landline telephone is received by the mobile terminal, the function of the wireless telephone can be automatically set according to the signal.

In addition, the wired telephone to which the present invention is applied as described above is provided with a wireless device in order to apply a wireless telephone, and also has a function of a charger for charging a conventional mobile terminal at the same time, so that the present invention can be used more conveniently. It may be.

As described above, the present invention is characterized by being able to be used as a cordless telephone of a landline telephone used in a home by adding a specific device to a mobile terminal, and those skilled in the art who properly understand the present invention are within the scope of the present invention. It is easy to make another invention in.

The mobile terminal that can be used as a cordless phone as described above can be used as a mobile terminal outside the home, and the mobile terminal can also be used as a wireless phone in the home, thereby providing a mobile terminal and a wireless phone, which had to be separately provided in the related art. Since there is no need to provide a separate, there is an effect that the economic burden is reduced, and even as a user there is an advantage that the desired function can be obtained with one device without using each wireless device separately.

Claims (4)

A first switching switch for switching the received signal according to a setting mode of the current mobile terminal after the signal received through the antenna is amplified / filtered / frequency converted; A reception baseband converter for converting a received signal into a baseband signal when the setting mode of the first switching switch is a mobile terminal; A control unit for reproducing a voice signal from the received signal through the received baseband converter; An intermediate frequency band filter for filtering a received signal when the setting mode of the first switching switch is a wireless telephone; An FM signal processor for reproducing voice from the received signal filtered by the intermediate frequency filter; And And a two-switch switch for switching and outputting an input signal of the control unit or the FM signal processing unit. 2. Receiving a wireless signal through an antenna; Allowing a received signal to be separated from the wireless signal through a handset switcher; Amplifying / filtering / frequency converting the received signal; Switching the received signal corresponding to a setting mode of a terminal; And When the setting mode is a mobile terminal, is converted to a baseband and reproduced by voice based on a controller, and when the setting mode is a wireless telephone, it is reproduced by voice after being filtered based on a frequency band filter. A reception method of a mobile terminal that can be used as a cordless telephone. The method of claim 2, And the setting mode of the terminal is set in advance according to the subscriber's selection in the step of switching the received signal. The method of claim 2, The setting mode of the terminal at the step of switching the received signal is to be switched to a wireless telephone, characterized in that automatically switch to a wireless telephone function according to whether or not to receive a wireless signal output from a wired device equipped with a wireless telephone function. Receiving method of a mobile terminal.

Images