JP4407360B2 - System power supply device and communication device including the same - Google Patents

Description

  The present invention relates to a system power supply device using an IC component in which a plurality of regulator circuits, for example, are integrated, and a communication device including the system power supply device.

FIG. 5 is a block diagram showing one main circuit configuration example of an apparatus provided with a plurality of circuits that perform circuit operation using a power supply voltage. The apparatus shown in FIG. 5 is a communication apparatus that performs wireless communication. The communication apparatus 1 includes an antenna 2, a transmission / reception input / output unit 3 including a switching unit or a demultiplexing unit, a transmission unit 4, and a synthesizer unit 5. A receiving unit 6, a baseband unit 7, a reference oscillation unit 8, and an equipment function control unit 9. Each circuit constituting the transmission unit 4, the synthesizer unit 5, the reception unit 6, the baseband unit 7, the reference oscillation unit 8, and the equipment function control unit 9 performs a circuit operation using a power supply voltage. The communication device 1 is provided with power supply components 10 (10 ₄ to 10 ₉ ) corresponding to the respective circuits.

Each power supply component 10 (10 ₄ to 10 ₉ ) is an IC component in which one or a plurality of regulator circuits are built in, and the regulator circuit is determined in advance using the external input voltage V _IN. A DC voltage having a value is generated, and the DC voltage is applied as a power supply voltage to a corresponding circuit. Each power supply component 10 is configured such that a control signal is applied from, for example, a control unit (not shown) or the baseband unit 7 of the communication device 1, and each power supply component 10 is based on the control signal. The power supply voltage is output and the output is stopped, respectively.

The reference oscillation unit (VCTCXO or TCXO) 8 uses the power supply voltage from the power supply component 10 ₈ to generate and output a clock signal that serves as a reference for the operation of each circuit. The synthesizer unit 5 performs a circuit operation using the power supply voltage and the clock signal, and outputs a conversion signal having a predetermined frequency. FIG. 6 is a block diagram showing a circuit configuration example of the synthesizer unit 5. The synthesizer unit 5 includes an LPF (low-pass-filter) 18, a VCO (Voltage-Controlled-Oscillator) 19, and a PLL (Phase-Locked-Loop) IC 20, and feedback of the PLLIC 20. The output of the VCO 19 based on the control is output from the synthesizer unit 5 to the outside as a conversion signal. In this example, the VCO 19 and the PLLIC 20 are constituted by IC parts, and the VCO 19 and the PLLIC 20 that are composed of these IC parts operate by supplying a common power supply voltage. The PLLIC 20 includes at least a frequency divider, a phase comparator, and a charge pump.

  When the reception signal received by the antenna 2 is applied through the transmission / reception input / output unit 3, the reception unit 6 receives the power supply voltage, the clock signal, and the conversion signal added from the synthesizer unit 5. The signal is demodulated, and the resulting signal is output toward the baseband unit 7. The baseband unit 7 performs signal processing of the reception signal applied from the reception unit 6 by a circuit operation using the power supply voltage and the clock signal.

  When a transmission signal is added from the baseband unit 7, the transmission unit 4 uses the power supply voltage, the clock signal, and the conversion signal of the synthesizer unit 5 to modulate the transmission signal. The subsequent signal is supplied to the antenna 2 via the transmission / reception input / output unit 3. When a transmission signal is supplied, the antenna 2 excites based on the signal and wirelessly transmits the signal.

  The equipment function control unit 9 controls operation of equipment such as a speaker, a screen such as a liquid crystal screen, and a camera provided in the communication device 1. In addition, although the prior art document was investigated, the suitable prior art document which should be described here was not found.

Recently, instead of the plurality of power supply components 10, there is a tendency to employ a power supply component 11 as shown in FIG. The power supply component 11 is an IC component in which a plurality of regulator circuits 12 (12 _{4 to} 12 ₉ ) are integrated. From each regulator circuit 12, a corresponding circuit (transmission unit 4, synthesizer unit 5 or reception unit) is individually provided. 6, the baseband unit 7, the reference oscillation unit 8, and the equipment function control unit 9) output a predetermined DC voltage as a power supply voltage. For example, a control signal is applied to the power supply component 11 from a control unit (not shown) or the baseband unit 7 of the communication device 1, and each regulator circuit 12 is configured based on the control signal. Voltage output and output stop are performed.

For example, when a control signal for instructing the start of power supply voltage output is applied to the power supply component 11 when the communication device 1 is started up, the regulator circuit 12 (12 ₈ ) starts circuit operation based on the control signal. The power supply voltage starts to be output toward the reference oscillation unit 8. The regulator circuit 12 (12 ₅ ) starts the circuit operation at a predetermined timing after the reference oscillation unit 8 starts outputting the clock signal by this power supply voltage output, and the power supply voltage is directed to the synthesizer unit 5. Start to output. Further, after that, the regulator circuit 12 (12 ₆ ) starts the circuit operation and starts outputting the power supply voltage to the receiving unit 6, and the regulator circuit 12 (12 ₇ ) starts the circuit operation and the power supply voltage. In response to a control signal applied to the power supply component 11 from the outside, for example, each regulator circuit 12 starts voltage output sequentially at a predetermined timing. To do. Further, at the time of steady operation of the communication device 1, each regulator circuit 12 performs voltage output and its output stop (on / off operation) at a timing based on the control signal. Further, at the end of the operation of the communication device 1, each regulator circuit 12 of the power supply component 11 sequentially stops voltage output, for example, at a predetermined timing.

  By using such a power supply component 11, the circuit configuration of the apparatus can be simplified, and the downsizing of the apparatus can be promoted.

  However, due to design problems, it is difficult to integrally form a plurality of regulator circuits 12 having excellent noise characteristics (noise removal performance based on the input voltage Vin and noise generated in the regulator circuit). For this reason, each regulator circuit 12 constituting the general-purpose power supply component 11 has a noise characteristic lower than that of the regulator circuit of the power supply component 10.

  In addition, since the power supply component 11 integrates a plurality of regulator circuits 12 and the interval between the regulator circuits 12 is very narrow, crosstalk (mutual interference) occurs between the regulator circuits 12. There arises a problem that the noise characteristics of the power supply voltages respectively output from the circuit 12 deteriorate. Due to the deterioration of the noise characteristic of the power supply voltage, there arises a problem that, for example, the synthesizer unit 5 and the reference oscillation unit 8 cannot oscillate an accurate conversion signal or clock signal. As a result, there may occur a problem that modulation at the transmission unit 4 and demodulation at the reception unit 6 are not performed satisfactorily, which may cause deterioration in communication performance of the communication device 1.

  The present invention has been made to solve the above-mentioned problems, and its purpose is to reduce the noise characteristics of the power supply voltage while using a power supply component (regulator assembly portion) in which a plurality of regulator circuits are formed. It is an object of the present invention to provide a system power supply apparatus and a communication apparatus including the system power supply apparatus that can prevent the operation failure of the apparatus.

  In order to achieve the above object, the present invention has the following configuration as means for solving the above problems. In other words, the system power supply device of the present invention has a configuration in which a plurality of regulator circuits are formed and each regulator circuit outputs a predetermined DC voltage and stops its output based on a control signal applied from the outside. An regulator circuit unit is provided, and an external regulator circuit externally attached to the regulator assembly unit is provided on the output voltage output side of one or more selected regulator circuits of the regulator assembly unit. The selected regulator circuit uses the output voltage of the circuit as a control signal, and controls the voltage output of the external regulator circuit and its output stop in addition to the control signal input unit of the corresponding external regulator circuit The output voltage of the external regulator circuit is output to the outside. That.

  The communication device according to the present invention includes a system power supply device having a configuration unique to the present invention in a communication device provided with a plurality of circuits that perform circuit operation using a power supply voltage. Each voltage output from each regulator circuit of the apparatus has a configuration in which each voltage is supplied to each circuit as a power supply voltage, and at least noise reduction of the power supply voltage among a plurality of circuits to which the power supply voltage is supplied In addition, an output voltage of an external regulator circuit of the system power supply device is applied as a power supply voltage to a predetermined circuit whose performance is improved as a result.

  According to the present invention, the regulator aggregate unit in which a plurality of regulator circuits are aggregated is provided, and the regulator aggregate unit is individually associated with at least one selected regulator circuit of the regulator aggregate unit. An external (additional) regulator circuit to be externally attached is provided.

  In the present invention, a regulator assembly unit is not constructed by electrically connecting a preselected regulator circuit of the regulator assembly unit and a corresponding external regulator circuit in series to construct a multistage regulator circuit. The selected regulator circuit is configured to function as a control unit of the external regulator circuit that controls the voltage output of the corresponding external regulator circuit and its output stop, and in place of the selected regulator circuit, An external regulator circuit is configured to output the output voltage to the outside as a power supply voltage.

  As an external regulator circuit, it is easy to provide a regulator circuit with better output voltage noise characteristics than the regulator assembly regulator circuit. Therefore, an external regulator circuit with excellent noise characteristics is provided. With the configuration in which the output voltage of the external regulator circuit is output to the outside as a power supply voltage, it becomes easy to supply a power supply voltage with excellent noise characteristics.

  For example, in a communication device provided with a plurality of circuits that perform circuit operation using power supply voltage, when a system power supply device having a configuration specific to the present invention is incorporated, at least along with noise reduction of the power supply voltage Thus, a predetermined circuit whose performance is improved (that is, a circuit that is easily affected by noise of the power supply voltage) is supplied with the output voltage of an external regulator circuit of the system power supply device as the power supply voltage. Since it is easy to output a power supply voltage with excellent noise characteristics from an external regulator circuit of the system power supply unit, supply of a power supply voltage with excellent noise characteristics makes it easy for circuits that are susceptible to adverse effects of power supply noise. Performance can be improved. For example, the circuit of the reference oscillation unit and synthesizer unit of a communication device is easily affected by the noise of the power supply voltage, so the reference oscillation can be achieved by supplying the power supply voltage of an external regulator circuit to such a circuit. The circuit of the synthesizer unit and the synthesizer unit can produce, for example, an accurate clock signal as designed, and a conversion signal having a preset frequency used for modulation and demodulation. For this reason, it is possible to prevent a problem caused by the failure of the clock signal or the conversion signal, thereby improving the reliability of the communication device with respect to the communication performance. In recent years, a direct conversion technique has been adopted for a receiving unit of a communication apparatus, and thus a low-noise power supply voltage is required. When such a receiving unit is provided, it is possible to improve the performance of the receiving unit by supplying the power supply voltage of the external regulator circuit to the receiving unit. It is effective to supply the power supply voltage to the receiver.

  In the present invention, as described above, since the selected regulator circuit of the regulator assembly unit is configured to function as a control unit of the external regulator circuit, the regulator circuit of the regulator assembly unit, the external regulator circuit, The following effects that cannot be obtained when a multi-stage regulator circuit is constructed using the above can be obtained. For example, when a regulator circuit having a multi-stage configuration is constructed, there is a problem that the power supply voltage output from the system power supply device is lower than a preset voltage value because the regulator circuits are provided in multiple stages. It is easy to generate.

  When a multi-stage regulator circuit is constructed, it is necessary to externally apply a control signal for controlling the voltage output and its output stop not only to the regulator assembly section but also to an external regulator circuit. Therefore, the system power supply apparatus requires external control signals for the external regulator circuit as many as the number of external regulator circuits in addition to the control signal for the regulator assembly unit.

  On the other hand, in the present invention, the voltage output of the external regulator circuit and the output stop thereof are controlled by the corresponding regulator circuit of the regulator assembly section, so that a control signal for controlling the external regulator circuit is provided. There is no need to add from the outside. For this reason, the system power supply apparatus of the present invention can be controlled only by externally applying only the control signal for the regulator assembly section. As a result, for example, the number of control signal terminals of the baseband unit provided in the communication device can be reduced, and the communication device and communication system using the system power supply device of the present invention can be simplified.

  In addition, a system power supply device having a unique configuration in the present invention can be incorporated into a device designed to incorporate a system power supply device provided with only a regulator assembly, without making a design change. The reliability with respect to the circuit operation of the apparatus can be easily improved as compared with the case where the system power supply apparatus having only the regulator assembly portion is provided.

  Embodiments according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing an embodiment of a system power supply device and a communication device according to the present invention. The communication device 1 of this embodiment has a unique system power supply device 15 as described below. The configuration other than this configuration is almost the same as the configuration of the communication apparatus shown in FIGS. 4 and 5. In the description of this embodiment, the same components as those of the communication apparatus shown in FIGS. And redundant description of common parts is omitted.

In this embodiment, the system power supply device 15 includes a power supply component 11 that is a regulator assembly, and a plurality of external (additional) regulator circuits 16 (16 ₄ , 16 ₅ ) externally attached to the power supply component 11. , 16 ₆ , 16 ₈ ). A plurality of regulator circuits 12 are formed in the power supply component 11, and each regulator circuit 12 is based on a control signal applied to the power supply component 11 from a control unit (not shown) or the baseband unit 7. A predetermined DC voltage is output and the output is stopped. In this embodiment, the output section of the output voltage of the regulator circuit 12 ₉ is connected to the equipment function control unit 9, a power supply voltage to the equipment function control unit 9 from the regulator circuit 12 ₉ is supplied. The output unit of the output voltage of the regulator circuit 12 ₇ is connected to the baseband unit 7, a power supply voltage is supplied from the regulator circuit 12 ₇ the baseband unit 7.

Further, the output sections of the output voltages of the regulator circuits 12 ₄ , 12 ₅ , 12 ₆ , and 12 ₈ respectively control the additional regulator circuits 16 (16 ₄ , 16 ₅ , 16 ₆ , and 16 ₈ ) that correspond individually. It is connected to the signal input section. As a result, each regulator circuit 12 (12 ₄ , 12 ₅ , 12 ₆ , 12 ₈ ) uses the output voltage of the circuit as a control signal, and the corresponding additional regulator circuit 16 (16 ₄ , 16 ₅ , 16 _6). , 16 ₈ ).

The additional regulator circuit 16 (16 ₄ , 16 ₅ , 16 ₆ , 16 ₈ ) is determined in advance using the external input voltage V _IN based on a control signal applied from the regulator circuit 12 side. Outputs a DC voltage with a voltage value and stops the output. In other words, the additional regulator circuit 16 (16 ₄ , 16 ₅ , 16 ₆ , 16 ₈ ) has its voltage output when the corresponding regulator circuit 12 (12 ₄ , 12 ₅ , 12 ₆ , 12 ₈ ) starts voltage output. In response to the output voltage, the circuit is activated to start voltage output. Further, the additional regulator circuit 16 (16 ₄ , 16 ₅ , 16 ₆ , 16 ₈ ) has a voltage when the corresponding regulator circuit 12 (12 ₄ , 12 ₅ , 12 ₆ , 12 ₈ ) stops voltage output. Stop output.

The output voltage of the additional regulator circuit 16 ₄ is the transmitter 4 as a power supply voltage, also the synthesizer unit 5 output voltage of the additional regulator circuit 16 ₅ is a power supply voltage, furthermore, the output voltage of the additional regulator circuit 16 ₆ the receiving section 6 as the power supply voltage, furthermore, the output voltage of the additional regulator circuit 16 ₈ the reference oscillation unit 8 as a power supply voltage, respectively, are output.

That is, in this embodiment, the regulator circuit 12 (12 ₄ , 12 ₅ , 12 ₆ , 12 ₈ ) controls the corresponding additional regulator circuit 16 (16 ₄ , 16 ₅ , 16 ₆ , 16 ₈ ), respectively. The additional regulator circuit 16 (16 ₄ , 16 ₅ , 16 ₆ , 16 ₈ ) replaces the corresponding regulator circuit 12 (12 ₄ , 12 ₅ , 12 ₆ , 12 ₈ ), respectively. It is configured to output voltage.

  Since the additional regulator circuit 16 is easier to improve the noise characteristics than the regulator circuit 12 of the general-purpose power supply component 11, for example, in this embodiment, the additional regulator circuit 16 has an additional noise characteristic superior to the regulator circuit 12. A regulator circuit 16 is provided. In this embodiment, the communication device 1 selects a circuit that is susceptible to the adverse effects of power supply voltage noise (a circuit whose performance improves as the power supply voltage noise is reduced), and this selected circuit (in this embodiment example). The power supply voltage is supplied from the additional regulator circuit 16 of the system power supply device 15 to the transmission unit 4, the synthesizer unit 5, the reception unit 6, and the reference oscillation unit 8). For this reason, in this embodiment, compared with the case where the power supply voltage is supplied from the regulator circuit 12 of the power supply component 11 to each circuit of the transmission unit 4, the synthesizer unit 5, the reception unit 6, and the reference oscillation unit 8. The noise characteristic of the power supply voltage supplied to each circuit of the unit 4, the synthesizer unit 5, the receiving unit 6, and the reference oscillation unit 8 is improved. As a result, it is possible to suppress the occurrence of problems caused by noise in the power supply voltage, and to improve the reliability of the communication device 1 with respect to the circuit operation.

In this embodiment, the regulator circuit 12 (12 ₄ , 12 ₅ , 12 ₆ , 12 ₈ ) of the power supply component 11 functions as a control unit for the additional regulator circuit 16 (16 ₄ , 16 ₅ , 16 ₆ , 16 ₈ ). Therefore, the voltage output of the additional regulator circuit 16 (16 ₄ , 16 ₅ , 16 ₆ , 16 ₈ ) can be stopped and output stopped only by supplying a control signal from the outside to the power supply component 11 of the system power supply 15. Can also be controlled. For example, when the power supply component 11 includes a configuration in which each regulator circuit 12 sequentially starts voltage output in a predetermined order based on a control signal applied from the outside when the communication device 1 is activated, the communication device The additional regulator circuit 16 (16 ₄ , 16 ₅ , 16 ₆ , 16 ₈ ) and the regulator circuit 12 (12 ₇ , 12 ₉ ) can be obtained simply by adding a control signal to the power supply component 11 of the system power supply 15 at the time of starting 1. A power supply voltage can be sequentially output to a corresponding circuit (a transmission unit 4, a synthesizer unit 5, a reception unit 6, a baseband unit 7, a reference oscillation unit 8, or an equipment function control unit 9) in a predetermined setting order. it can.

  In addition, this invention is not limited to the form of this embodiment, Various embodiment can be taken. For example, in this embodiment example, only one power supply voltage is supplied from the system power supply device 15 to the baseband unit 7 and the equipment function control unit 9. 9 may require a plurality of power supply voltages. In this case, a plurality of power supply voltages are supplied from the system power supply device 15 to the baseband unit 7 and the equipment function control unit 9, and a plurality of power supply voltages supplied to the baseband unit 7 and the equipment function control unit 9 are used. At least one of the power supply voltages may be a power supply voltage from the additional regulator circuit 16.

  When the synthesizer unit 5 has a circuit configuration as shown in FIG. 6, in this embodiment, the VCO 19 and the PLLIC 20 share a common circuit from the additional regulator circuit 16 of the system power supply device 15. The power supply voltage is supplied, but one side of the VCO 19 and the PLLIC 20 is supplied with the power supply voltage from the additional regulator circuit 16, and the other side is supplied from the regulator circuit 12 of the power supply component 11. A configuration in which a power supply voltage is supplied may be employed.

Further, in this embodiment, the system power supply device 15 is provided with four additional regulator circuits 16 to be connected to four circuits of the transmission unit 4, the synthesizer unit 5, the reception unit 6, and the reference oscillation unit 8. However, for example, when it is desired to reduce the size and cost of the system power supply device 15, only the circuit that is most susceptible to the adverse effects of power supply voltage noise, that is, the synthesizer unit 5 and the reference oscillation unit 8 is used. As shown in FIG. 2, the system power supply device 15 may be provided with only the additional regulator circuit 16 (16 ₅ , 16 ₈ ).

Furthermore, as shown in FIG. 3, an additional regulator circuit 16 may be provided on the output side of all the regulator circuits 12 (12 _{4 to} 12 ₉ ) constituting the power supply component 11.

  Further, in this embodiment, an example in which the system power supply device 15 is incorporated in the communication device 1 has been described. However, the system power supply device of the present invention is provided with a plurality of circuits that perform circuit operation using a power supply voltage. If it is a device, it can also be incorporated in devices other than communication devices.

It is a block block diagram for demonstrating one Embodiment of the system power supply device and communication apparatus which concern on this invention. It is a block block diagram for demonstrating other example embodiments. Furthermore, it is a block block diagram for demonstrating other embodiment examples. It is a figure for demonstrating the example of a circuit structure at the time of using the component in which the several regulator circuit was aggregate-formed. It is a figure for demonstrating a prior art example. It is a block diagram showing the example of a circuit structure of the synthesizer part.

Explanation of symbols

1 Communication Device 11 Power Supply Component 12, 16 Regulator Circuit 15 System Power Supply Device

Claims (3)

  A regulator assembly unit having a configuration in which a plurality of regulator circuits are formed and each regulator circuit is configured to output a predetermined DC voltage and stop the output based on a control signal applied from the outside. An external regulator circuit that is externally attached to the regulator assembly is provided on the output voltage output side of the one or more selected regulator circuits, and the selected regulator circuit in the regulator assembly is In addition to the control signal input section of the corresponding external regulator circuit as a control signal, the voltage output of the external regulator circuit and its output stop are controlled. A system power supply apparatus characterized in that an output voltage is output to the outside.   In a communication device provided with a plurality of circuits that perform circuit operation using a power supply voltage, the system power supply device according to claim 1 is incorporated, and each different voltage output from each regulator circuit of the system power supply device Is provided to each circuit as a power supply voltage, and among the plurality of circuits to which the power supply voltage is supplied, at least a predetermined circuit whose performance is improved in accordance with noise reduction of the power supply voltage An output voltage of an external regulator circuit of the system power supply device is applied as a power supply voltage.   At least one of a reference oscillation unit, a synthesizer unit, and a reception unit that performs circuit operation using a power supply voltage is provided, and at least the reference oscillation unit, the synthesizer unit, or the reception unit is provided with an external system power supply device 3. The communication apparatus according to claim 2, wherein an output voltage of the regulator circuit is applied as a power supply voltage.

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