KR200363911Y1 - Power Control Apparatus of Mobile Phone using by Dual Modeor Triple Mode - Google Patents

Abstract

The present invention relates to a power control circuit of a dual band / triple mode mobile terminal, which is suitable for reducing power consumption and not being affected by radio frequency (RF) signals of different bands / modes. Code division multiple access (CDMA), cellular advanced mobile phone service (AMPS), and personal communication service (PCS) CDMA mode can be configured to support all of the required band / mode services selectively In a dual band / triple mode mobile terminal, a sleep signal, an idle signal, a band selection control signal, and a mode selection control signal are used to supply power to the RF blocks to support a desired band and mode service. Characterized in that.

Description

Power Control Apparatus of Mobile Phone using by Dual Modeor Triple Mode}

The present invention relates to a dual-band / triple-mode mobile terminal, and more particularly, to a power control device of a dual-band / triple-mode mobile terminal, which is suitable for reducing power consumption and not being affected by high frequency (RF) signals of other bands / modes. will be.

In general, a dual-band / triple-mode mobile terminal is a terminal that can selectively receive the necessary band / mode services by configuring RF blocks to support all three modes (cellular CDMA, cellular AMPS, PCS CDMA) in one terminal. it means.

Hereinafter, a conventional dual band / triple mode mobile terminal will be described with reference to the accompanying drawings.

1 is a diagram illustrating an RF block of a conventional dual band / triple mode mobile terminal.

That is, FIG. 1 is a diagram schematically illustrating RF blocks of a cellular terminal in an 800 MHz band or a PCS terminal in a 1.8 GHz band currently serving.

Briefly describing the flow of the received signal in the mobile terminal, as shown in FIG. Enter).

Here, the local oscillator (LO) 14 and the down mixer (down mixer) 15 are combined and converted into IF signals, and then the baseband A / D and D through the receiving intermediate frequency processor (RX_IF) 16. Enter the / A converter 17.

On the other hand, in the case of a transmission signal, an intermediate frequency (IF) signal from the baseband analog-to-digital (A / D) and digital-to-analog (D / A) digital converter (17) is transmitted. After going to the credit intermediate frequency processing unit (TX-IF) 18, the local oscillator 14 and the up mixer 19 are combined and converted into an RF signal.

Subsequently, the signal converted into the RF signal is transmitted through the antenna 11 after passing through the duplexer 12 through the TX radio frequency processor (TX_RF) 20.

Conventionally, in case of a mobile terminal using CDMA technology, a control signal such as a sleep signal and an idle signal is used separately to the RF receiving block and the transmitting block in order to reduce power consumption and supply power only to a required block. Supply power.

That is, in the reception mode, the + V_RX power is supplied to the RF receiver, and the RF transmitter does not need to operate, so power is not supplied.

On the contrary, in the transmission mode, + V_TX power is supplied to the RF transmitter and + V_RX power is supplied to the RF receiver to make a call.

FIG. 2 is a diagram schematically illustrating a power supply unit for supplying power to RF blocks of the dual band / triple mode mobile terminal of FIG. 1.

In FIG. 2, + VBATT represents a power source supplied from a battery, and + VCC represents a power source used for a portion of the terminal that should always be supplied regardless of a transmission / reception mode such as a microprocessor or a memory.

And + V_RX means power supplied to the RF receiving block, + V_TX means power supplied to the RF transmission block.

Meanwhile, in the case of the CDMA terminal, the sleep signal Sleep / and the idle signal Idle / are used to effectively control the power supply.

In this case, when the Sleep / signal is “L (Low)”, it means a sleep mode. In this case, all RF blocks do not operate, but only a part of the microprocessor and the baseband A / D and D / A converter 17. Reduce current consumption by only operating.

The above technique is used as a method to increase the battery life of the terminal using the CDMA technology. On the other hand, "H (High)" indicates that the reception mode.

When the idle / signal is “L”, it indicates an idle state, that is, a reception mode as a reception standby state, and when “I” indicates a transmission mode.

Therefore, it is possible to control the power supply unit so that power is supplied only to a required part according to the transmission / reception mode using the sleep / signal and the idle / signal.

The regulator 21 of the power supply unit receives + VBATT as an input power supply and generates an output power supply only when the control signal is "H".

In the receive mode, since the Sleep / signal is " H ", the regulator 21 generates + V_RX power to supply power required for the RF receive block by this control signal.

Since the idle / signal is “H” in the transmission mode, the regulator 21 generates + V_TX power supply to supply the power required for the RF transmission block by this control signal. In this case, the sleep signal is also in the “H” state. Therefore, the + V_RX power is also supplied to the RF receiving block.

In the sleep mode, the Sleep / signal is in the “L” state. In this case, no + V_RX or + V_TX power is generated, only + VCC power is generated and no power is supplied to the RF transmission and reception blocks.

As described above, when the method of controlling power according to the transmission / reception mode is simply applied to the dual-band / triple mode terminal as in the single-band terminal, the RF reception block of the PCS band operates. If there is no current consumption, there is a problem that the RF signal of the cellular band is affected by the RF signal interference of the PCS band that may occur at this time.

The present invention has been devised to solve the above problems, and it is necessary to use a band selection control signal for selecting a cellular band / PCS band and a mode selection control signal for selecting a CDMA mode / AMPS mode from a power block using RF power supplies. Dual-band / Triple mode mobile terminal that reduces current consumption by supplying power only to the part and prevents the operation of the unselected band / mode high frequency (RF) block so as not to be influenced by the band / mode. The purpose is to provide a power supply control device.

Power control device of the dual-band / triple mode mobile terminal according to the present invention for achieving the above object is required to configure the RF block to support all cellular CDMA, cellular AMPS, PCS CDMA mode in one terminal band / mode In a dual-band / triple-mode mobile terminal that can selectively receive a service, a sleep signal, an idle signal, a band selection control signal, and a mode selection control signal are used to supply power to the RF blocks. It is characterized in that the service of the band and mode.

1 illustrates an RF block of a conventional dual band / triple mode mobile terminal.

FIG. 2 is a simplified diagram illustrating a power supply unit for supplying power to RF blocks of the dual band / triple mode mobile terminal of FIG.

3 is a diagram illustrating an RF block of a dual band / triple mode terminal according to the present invention

4 illustrates an apparatus for supplying power to RF blocks of the dual band mobile communication terminal of FIG.

Explanation of symbols for main parts of the drawings

31: antenna 32: RF switch

33: PCS Duplexer 38: Baseband A / D and D / A Converter

42: Cellular Duplexer 50: Regulator

51: power switch

Hereinafter, with reference to the accompanying drawings the power control device of a dual-band / triple mode mobile terminal according to the present invention will be described.

3 is a diagram illustrating an RF block of a dual band / triple mode terminal according to the present invention.

In FIG. 3, a high frequency (RF) block is composed of RF blocks for a cellular band and RF blocks for a personal communication service (PCS) band, which band is to be serviced through which band of RF blocks. It is possible by controlling the RF switch using a band selection control signal for selecting.

Most RF blocks for the cellular band are configured to support both CDMA and AMPS modes, and subblocks for CDMA mode and subblocks for AMPS mode may be separately used as necessary.

As shown in FIG. 3, the signal received through the dual band antenna 31 is switched to the RF block of the PCS band by the band selection control signal, and passes through the PCS duplexer 33 to wirelessly receive the PCS. The frequency processing unit (PCS_RX_RF) 34 enters.

Here, the PCS local oscillator (PCS_LO) 35 is combined with the PCS down mixer 36 to generate the PCS reception intermediate frequency processing signal (PCS_RX_IF), and this PCS reception intermediate frequency processing signal (PCS_RX_IF) is used for PCS reception. After going through the intermediate frequency processing unit (PCS_RX_IF stage) 37, it enters the baseband A / D and D / A converter 38.

For the effective control of the power supply in the dual-band triple mode terminal, if the band selection control signal and the mode selection control signal are used for the power supply in addition to the sleep signal and idle signal used in the conventional cellular terminal or the PCS terminal, the band / mode to be serviced Powering only the RF blocks reduces unnecessary power consumption and eliminates the effects of RF signals that can occur when RF blocks in other bands / modes operate.

On the other hand, in the case of the transmission signal, the PCS IF signal from the baseband A / D and D / A converter 38 is input to the PCS transmission intermediate frequency processing unit (PCS_TX_IF) 39 and then the PCS local oscillator 35 and the up mixer. Combined at 40 and converted to a PCS RF signal.

Subsequently, the signal converted into the PCS RF signal is transmitted through the antenna 31 after passing through the PCS duplexer 33 through the PCS transmission radio frequency processor (PCS_TX_RF) 41.

On the other hand, the signal received through the dual-band antenna 31 is switched to the RF block 32 of the cellular band by the band selection control signal to the RF block 32 through the cellular duplexer 42 to receive the cellular radio processor (Cell_RX_RF) 43).

Here, the cellular local oscillator (Cell_LO) 44 is combined with the cellular down mixer 45 to generate the cellular reception intermediate frequency processing signal Cell_RX_IF, and the cellular reception intermediate frequency processing signal Cell_RX_IF is for cellular reception. After going through the intermediate frequency processing unit (Cell_RX_IF) 46, it enters the baseband A / D and D / A converter 38.

On the other hand, in the case of the transmission signal, the cellular IF signal from the baseband A / D and D / A converter 38 is input to the cellular transmission intermediate frequency processor (Cell_TX_IF) 47 and then the cellular local oscillator 44 and the up mixer. Combined at 48 and converted to a cellular RF signal.

Subsequently, the signal converted into the cellular RF signal is transmitted through the antenna 31 after passing through the cellular duplexer 42 through the cellular transmission radio frequency processor (Cell_TX_RF) 49.

FIG. 4 is a diagram illustrating an apparatus for supplying power to RF blocks of the dual band mobile communication terminal of FIG. 3.

That is, in order to supply power to the RF blocks of the dual band mobile communication terminal shown in FIG. 3 of the present invention, in addition to the sleep signal Sleep / and idle signal Idle / as shown in FIG. Use additional mode selection control signal.

When the band selection control signal is represented as a Cell / signal and a PCS / signal, the Cell / signal indicates a cellular mode, and the “H” indicates a PCS mode.

On the other hand, the PCS / signal is used by inverting the Cell / signal (Invert).

That is, when the Cell / signal is "H", the PCS / signal becomes "L", so it can be seen that the PCS mode.

In addition, when the mode selection control signal is expressed as FM / signal, the FM / signal is "L" for AMPS mode and "H" for CDMA mode.

By combining the band selection control signal and the mode selection control signal, the regulator 50 uses + VCT as an input power supply, + VCC, + V_Cell_RX, + V_Cell_TX, + V_PCS_RX, + V_PCS_TX, + V_Cell_FM_RX, + V_Cell_CDMA_RX, + V_Cell_FM_TX. Create a power source named V_Cell_CDMA_TX.

Here, + VCC is a power source that is always used to supply power, + V_Cell_RX is a power source used for RF reception block of cellular band, + V_Cell_TX is a power source used for RF transmission block of cellular band, and + V_PCS_RX is The power source used for the RF receiving block of the PCS band, + V_PCS_TX is the power source used for the RF transmission block of the PCS band.

Meanwhile, most cellular RF blocks are configured to support both AMPS mode and CDMA mode, and a subblock for AMPS mode or CDMA mode may be configured as necessary.

To this end, the + V_Cell_RX and + V_Cell_TX power supplies are again divided into AMPS mode and CDMA. That is, when the FM / signal is “L” by using the device acting as the power switch 51, the power of + V_Cell_RX can be used as the power only for AMPS mode, and the FM / signal is “H”. In this case, it can be used as a power source for CDMA mode only.

If the cell / signal is " H " and the Sleep / signal is " H ", this indicates that the reception mode is in the PCS band. Thus, the + V_PCS_RX can be generated. . The power is supplied only to the RF receiving block of the PCS band.

If Cell / signal is "L" (i.e. PCS / is "H") and Idle / signal is "H", this indicates that it is in cellular band transmission mode, so a + V_Cell_TX power supply is generated to provide cellular band RF transmission. The + V_Cell_RX power is also generated and supplied to the cellular band RF receiving block.

If the FM / signal is " H ", then subblocks for CDMA mode only need to be operated, + V_Cell_CDMA_TX, + V_Cell_CDMA_RX power supplies are supplied to the required subblocks.

By using this method, power is supplied only to the RF block of the corresponding band, and current consumption can be reduced. Since the power is not supplied to the RF block of another band mode, the influence of the RF signal of the other band can be eliminated.

As described above, the power control device of the dual band / triple mode mobile terminal according to the present invention has the following effects.

That is, by using the band selection control signal and the mode selection control signal to the power supply unit, power is supplied only to the RF block of the band / mode to be serviced, thereby reducing the current consumption, and preventing the RF blocks of other band / mode from operating. The influence of RF signals in other bands / modes can be eliminated.

Claims (2)

In a dual band / trip mode mobile terminal capable of selectively receiving a service of a required band / mode by configuring radio frequency (RF) blocks to support cellular CDMA, cellular AMPS, and PCS CDMA modes in a terminal, In order to support a service of a desired band and mode, a sleep signal, an idle signal, a band selection control signal, and a mode selection control signal for controlling a power supply unit for supplying power to the high frequency (RF) blocks are used. Power control device of a dual band / triple mode terminal. 2. The dual band / trip mode mobile terminal according to claim 1, wherein the band selection control signal and the mode selection control signal are used to control the power supply unit to supply power only to a high frequency (RF) block of a required band / mode. Power control unit.