JP2008219768A - Splitter module and tuner apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain the reduction of cost by reducing the number of external terminals for power feeding and gain switching signals, and wiring therefor from a splitter module. <P>SOLUTION: In a splitter module 1 comprising an input terminal 2 to the pre-stage of which an antenna device is connected and to which a signal outputted from the relevant antenna device is inputted; an amplifier circuit 11 and a variable attenuator 13; first and second distributors 12, 14 and third and fourth connector units 4, 5, the power source of the amplifier circuit 11 is supplied from a tuner apparatus (A) connected to the third connector unit 4 via the relevant third connector unit 4, and the control voltage of the variable attenuator 13 is supplied from a tuner apparatus (B) connected to the fourth connector unit 5 via the relevant fourth connector unit 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a splitter module that distributes a broadcast signal received by an antenna device and a tuner device that takes in the broadcast signal distributed by the splitter module and selects a channel.

  2. Description of the Related Art Conventionally, a broadcast signal receiving system that outputs a broadcast signal received by an antenna device in parallel to a television receiver and a tuner device with a built-in recorder includes a splitter module for branching the broadcast signal. For example, when two programs are recorded simultaneously, a 1-input 3-output splitter module is used.

  FIG. 7 is a schematic diagram of a splitter module with one input and three outputs to which two tuners are connected. In the splitter module 100, the first connection terminal 101 is connected to the antenna device to receive a broadcast signal, and the broadcast signal branched in the module is supplied from the second, third, and fourth connection terminals 102, 103, and 104. Is output. As shown in the figure, by connecting the second connection terminal 102 to the television receiver, and connecting the third and fourth connection terminals 103 and 104 to the first tuner A 105 and the second tuner B 106, Two programs can be recorded simultaneously while watching the program on the television receiver.

  FIG. 8 is a schematic internal circuit configuration diagram of the splitter module 100. As shown in the figure, the signal input to the first connection terminal 101 is branched by the first distributor 112 via the amplifier circuit 111, and one signal is sent from the second connection terminal 102 to the television receiver. Is done. The other signal is further branched by the second distributor 113 and sent from the third connection terminal 103 to the first tuner A 105, and sent from the fourth connection terminal 104 to the second tuner B 106.

  In the splitter module 100, a power supply terminal 107 and a control terminal 108 are provided for power supply to the amplifier circuit 111 and operation control (gain control or amplification operation on / off). The conventional splitter module 100 supplies a power supply voltage to a power supply terminal 107 through a power supply line from a power supply device of a motherboard (not shown), while a control circuit (for example, an AGC circuit) not shown through a dedicated control line. Thus, a control voltage is applied to the control terminal 108.

Further, when an antenna module having a single antenna is connected to a tuner module having two systems of input units, a splitter is provided for each of the antenna module, the first input unit, and the second input unit. There is a broadcast signal receiving system that connects first to third connector portions of a module (see, for example, Patent Document 1). In such a broadcast signal receiving system, a configuration is shown in which a driving voltage is applied from a tuner module to a first connector portion and supplied to the amplifier circuit of the splitter module via the first connector portion.
JP 2005-198075 A

  However, since the splitter module described in Patent Document 1 is configured to supply the power supply voltage to the amplifier circuit in the module from the tuner side via the connector unit, the splitter module is used to apply the control voltage to the attenuator. It is necessary to provide an external terminal and wiring up to that, which causes a cost increase.

  The present invention has been made in view of such a point, and provides a splitter module and a tuner device that can reduce power supply and control voltage application external terminals and wiring from the splitter module and can reduce costs. With the goal.

  The splitter module of the present invention includes an input terminal to which an antenna device is connected in the previous stage and a signal output from the antenna device is input, an amplifying device that is connected to the input terminal and capable of gain switching, and an output signal of the amplifying device. A distributor that distributes at least two; and first and second output terminals that are connectable to a tuner device at a subsequent stage and that output a signal distributed by the distributor. Power of the amplifying device is supplied from the connected tuner device via the first output terminal, and from the tuner device connected to the second output terminal, the power of the amplifying device is supplied via the second output terminal. A gain switching signal is supplied.

  According to this configuration, the power of the amplifying device is supplied from one tuner device via the first output terminal, and the gain switching signal of the amplifying device is supplied from the other tuner device via the second output terminal. Therefore, it is not necessary to provide an external terminal for supplying a power supply voltage and a gain switching signal to the amplifier device with respect to the splitter module, and wiring for that purpose can be reduced.

  The splitter module can be configured to be able to supply power to the antenna device.

  The tuner device according to the present invention is a tuner device to which the splitter module is connected in the preceding stage, a tuner input terminal connected to the first or second output terminal of the splitter module, and a power supply voltage for the amplifying device. Or a power supply circuit that can select either of the gain switching signal and supply it to the tuner input terminal, and when the splitter module is connected to the previous stage, a power supply voltage or a gain switching signal is supplied from the power supply circuit, When the power is supplied to the amplifier via a tuner input terminal and the splitter module is not connected to the previous stage, neither the power supply voltage nor the gain switching signal is supplied from the power supply circuit.

  With this configuration, when the splitter module is connected to the previous stage, the power supply voltage or gain switching signal is supplied from the tuner device side to the amplifier device via the tuner input terminal, so that the external terminal and wiring of the splitter module can be deleted. it can.

  According to the present invention, in the tuner device, the antenna device includes an antenna capable of receiving a satellite broadcast signal and a low noise block converter, and the power supply circuit supplies a power supply voltage for the low noise block converter to the tuner input terminal. When the splitter module is connected to the previous stage, a power supply voltage or a gain switching signal is supplied from the feeder circuit to the amplifier device via the tuner input terminal, and the antenna device is connected to the tuner device. When directly connected to the input terminal, the power supply voltage for the low noise block converter is supplied from the power supply circuit to the low noise block converter via the tuner input terminal.

  With this configuration, when the splitter module is connected to the previous stage, a power supply voltage or a gain switching signal is supplied from the tuner device side to the amplifier device via the tuner input terminal, and the antenna device is directly connected to the tuner input terminal. Since the power supply voltage for the low noise block converter is supplied from the power supply circuit to the low noise block converter via the tuner input terminal, both the case where the splitter module is connected to the previous stage and the case where it is not connected can be handled. The change can be handled by a tuner device having the same configuration.

  According to the present invention, it is possible to reduce power supply and gain switching signal external terminals and wirings therefor from the splitter module, thereby reducing costs.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a splitter module and a tuner device according to an embodiment of the present invention. In the splitter module 1, the first connector portion 2 serving as an input terminal is connected to the antenna device, and the second connector portion 3 is connected to the television receiver. Further, the third connector portion 4 serving as the first output terminal is connected to the input terminal of one tuner device 6, and the fourth connector portion 5 serving as the second output terminal is the input terminal of the other tuner device 7. Connected to. In the present embodiment, a power supply voltage is applied from one tuner device (A) 6 to the third connector portion 4 to supply power to the splitter module 1, and the other tuner device (B) 6 provides a fourth connector portion. A control voltage as a gain switching signal is applied to 5 to control the gain of the splitter module 1. Note that the present invention is not limited to a 1-input 3-output splitter module, and outputs a signal to one input where a received signal is input from a front-stage antenna apparatus and two tuner apparatuses A and B connected to a subsequent stage. If there are 2 outputs to be applied, it is applicable. Alternatively, the splitter module 1 may be provided with a feeding terminal 1a for feeding an antenna, and the splitter module 1 may be configured to feed power to the antenna device via the first connector unit 2.

  FIG. 2 is a circuit configuration diagram of the splitter module 1. An amplifier circuit 11 that amplifies a signal input from the antenna device, a first distributor 12 that branches an output signal of the amplifier circuit 11, and a variable attenuation that controls the gain of one signal branched by the first distributor 12 And a second distributor 14 for branching the signal whose gain is controlled by the variable attenuator 13. In the present embodiment, the amplifier circuit 11 and the variable attenuator 13 constitute an amplifier, but the present invention is not limited to such a configuration. For example, a variable gain amplifier or an attenuator capable of turning ON / OFF the attenuation operation can be used. Correspondingly, the gain switching signal may be a control signal for turning on / off the attenuator operation in addition to the gain control signal output from the AGC circuit. The power supply voltage of the amplifier circuit 11 is applied to the third connector unit 4 from one tuner device (A) 6. The third connector portion 4 is connected to the power supply terminal of the amplifier circuit 11 via the coil 15. A control voltage for controlling the attenuation factor of the variable attenuator 13 is applied to the fourth connector unit 5 from the other tuner device (B) 7. The fourth connector portion 5 is connected to the control terminal of the variable attenuator 13 via the coil 16.

  FIG. 3 is a schematic circuit configuration diagram of a power supply voltage or control voltage supply portion in the tuner device (A) 6 and the tuner device (B) 7. The tuner device (A) 6 and the tuner device (B) 7 will be described with reference to the same drawing. In one tuner device (A) 6, the tuner body 20 is connected to the third connector portion 4 via a capacitor 21. A terminal INPUT to which a power supply voltage is applied is connected via a coil 22 to an input terminal 6 a of the tuner device (A) 6 connected to the third connector unit 4. In the other tuner device (B) 7, the tuner body 20 is connected to the fourth connector portion 5 via the capacitor 21, and the input terminal of the tuner device (B) 7 connected to the fourth connector portion 5. A terminal INPUT to which a control voltage for the variable attenuator 13 is applied is connected to the terminal 7 a via a coil 22.

  According to the present embodiment configured as described above, the power supply voltage applied to the terminal INPUT in one tuner device (A) 6 is the input terminal of the tuner device (A) 6 and the third of the splitter module 1. It is taken into the splitter module 1 via the connection part with the connector part 4, and is supplied to the amplifier circuit 11 via the coil 15 as shown in FIG.

  On the other hand, the control voltage applied to the terminal INPUT in the other tuner device (B) 7 passes through the connection portion between the input terminal 7a of the tuner device (B) 7 and the fourth connector portion 5 of the splitter module 1 to the splitter. It is taken into the module 1 and applied to the variable attenuator 13 via the coil 16 as shown in FIG.

  In this way, the power supply voltage is supplied from one tuner device (A) 6 to the amplifier circuit 11 of the splitter module 1 via the third connector unit 4, and the other tuner device (B) 7 A control voltage is supplied to the variable attenuator 13 of the splitter module 1 via the connector unit 5. On the other hand, the RF signal introduced from the antenna device is amplified by the amplifier circuit 11 fed from the tuner side, and then branched by the first distributor 12. One of the branched signals is controlled in attenuation by the variable attenuator 13 controlled by the control voltage supplied from the tuner side via the third connector unit 4 and branched by the second distributor 14. The signals are sent to the two tuner devices (A) (B) 6 and 7, respectively.

  As described above, according to the present embodiment, power is supplied from the tuner devices (A) (B) 6, 7 connected to the two connector portions 4, 5 of the splitter module 1 via the connector portions 4, 5. Since the voltage and control voltage are supplied to the splitter module 1, the external terminals for supplying the power supply voltage and the control voltage from the splitter module 1 can be reduced, wiring for that can be reduced, and the cost can be reduced. Can be planned.

  In the above embodiment, the power supply voltage is supplied to the terminal INPUT of the tuner device (A) and the control voltage is applied to the terminal INPUT of the tuner device (B). It is not limited to such a configuration.

  For example, as shown in FIG. 4, the tuner devices (A) (B) 6 and 7 are provided with a terminal INPUT capable of applying a power supply voltage, and the tuner input terminals 6a and 7a are selectively supplied with a control voltage via a switch 23. It can be applied to. When the control voltage for the variable attenuator 13 of the splitter module 1 is generated in the integrated circuit 24 of the tuner device, the control voltage output terminal of the integrated circuit 24 is connected to the tuner input terminals 6 a and 7 a via the switch 23.

  In one tuner device (A) 6, the switch 23 is opened and the power supply voltage is set to be applied to the tuner input terminal 6a. In the other tuner device (B) 7, the terminal INPUT is opened and the switch is turned on. 23 is closed so that a control voltage is applied to the tuner input terminal 7a.

  By configuring the tuner device as described above, one tuner device (A) 6 and the other tuner device (B) 7 can have the same configuration, and the tuner devices can be shared.

  Next, an embodiment of a satellite broadcast receiving tuner device that can be fed by an antenna device or a splitter module will be described.

  FIG. 5 is a schematic circuit diagram of the satellite broadcast receiving tuner apparatus according to the present embodiment. The satellite broadcast receiving tuner device 30 has a tuner input terminal 31 to which a connector portion serving as an output end of the antenna device or a connector portion of a splitter module is connected. The antenna device includes a satellite broadcast receiving antenna and a low noise block converter (LNB), and supplies power to the LNB. A tuner body (not shown) is connected to a tuner input terminal 31 of the satellite broadcast receiving tuner device 30 via a capacitor 32 and an amplifier circuit 33.

  Further, the satellite broadcast receiving tuner device 30 is provided with a power supply terminal 34 to which a power supply voltage for supplying power to the LNB is applied. The power supply terminal 34 is connected to the tuner input terminal 31 via a coil 35. Further, one of the power supply voltage for feeding the splitter module and the control voltage for gain adjustment is applied to the input terminal 31 via the switch 36. The power supply voltage for feeding the splitter module and the gain of the variable attenuator or the control voltage for ON / OFF control can be selectively supplied to one terminal 36a of the switch 36 by a switch not shown. It is configured. That is, in the present embodiment, power can be supplied from the satellite broadcast receiving tuner device 30 to the antenna device, and the power supply voltage and the control voltage can also be supplied to the splitter module. The setting on the tuner device side is switched according to whether or not a splitter module is interposed between the antenna device and the satellite broadcast receiving tuner device 30.

  FIG. 6A shows a power supply route when the antenna device is directly connected to the satellite broadcast receiving tuner device 30, and FIG. 6B shows a power supply route when the antenna device is connected via the splitter module 40. Is shown.

  When the antenna device is directly connected to the satellite broadcast receiving tuner device 30 (FIG. 6A), the switch 36 of the satellite broadcast receiving tuner device 30 is opened and the power supply voltage is applied to the power supply terminal 34. . As a result, power is supplied to the LNB via the input terminal 31 of the satellite broadcast receiving tuner device 30.

  When connecting to the antenna device via the splitter module 40 (FIG. 6B), the power supply voltage is applied to the power supply terminal 41 of the splitter module 40 and the power is supplied to the LNB from the input terminal 42 of the splitter module 40. . The control voltage for the splitter module 40 is supplied from the satellite broadcast receiving tuner device 30 via the input terminal 31 in the same manner as in the above embodiment. At this time, the switch 36 is set to the ON state, and the gain of the variable attenuator of the splitter module or the control voltage for ON / OFF control is applied to the terminal 36a of the switch 36. Further, when a power supply voltage is applied to the amplifier circuit of the splitter module 40, the switch 36 is set to the ON state, and the power supply voltage is supplied to the terminal 36a of the switch 36 instead of the control voltage (not shown). Switch the switch.

  When two satellite broadcast receiving tuner devices 30 are connected to one antenna device, a 1-input 2-output splitter module can be used. Since two satellite broadcast receiving tuner devices are connected in parallel to the two output terminals (connector portions) of the splitter module, the power supply voltage for the splitter module is one tuner as in the embodiment shown in FIG. The control voltage is supplied from the other tuner device via the input terminal 31.

  As described above, according to the present embodiment, when the antenna device is directly connected, power can be supplied from the power supply terminal 34 via the input terminal 31, and when the antenna device is connected via the splitter module 40. The power supply voltage or the control voltage can be supplied to the amplifier circuit of the splitter module 40, and the number of terminals can be reduced and the wiring can be reduced as compared with the case where the splitter module 40 is provided with an external terminal and supplied from the outside.

  In the above description, the power supply voltage supplied from the outside to the splitter module 40 is supplied to the antenna device via the input terminal 42, but the power supply voltage supplied to the power supply terminal 34 of the satellite broadcast receiving tuner device 30. May be configured to be supplied via the splitter module 40.

  The present invention can be applied to a splitter module that distributes a signal output from one antenna device and a tuner device that takes in a broadcast signal distributed by the splitter module.

Schematic diagram of a splitter module and a tuner device according to an embodiment Schematic circuit configuration diagram of the splitter module of FIG. 1 is a configuration diagram of a power supply circuit portion in the tuner device of FIG. Configuration diagram of a modification of the power supply circuit portion in the tuner device of FIG. Schematic configuration diagram of a tuner device according to another embodiment (A) Schematic diagram in which a tuner device is directly connected to an antenna device in another embodiment, (b) Schematic diagram in which the tuner device is connected via a splitter module in another embodiment. The figure which shows the state which connected the two tuner apparatuses to the conventional 1 input 3 output splitter module Schematic circuit configuration diagram of the splitter module of FIG.

Explanation of symbols

1 ... Splitter module (1 input 3 output)
2 ... 1st connector part (input terminal)
3 ... 2nd connector part 4 ... 3rd connector part (1st output terminal)
5 ... 4th connector part (2nd output terminal)
6. Tuner device A
7. Tuner device B
DESCRIPTION OF SYMBOLS 11 ... Amplifier circuit 12 ... 1st divider | distributor 13 ... Variable attenuator 14 ... 2nd divider | distributor 15,16 ... Coil 20 ... Tuner main body 21 ... Capacitor 22 ... Coil 23 ... Switch 24 ... Integrated circuit 30 ... Tuner apparatus 31 ... tuner input terminal 34 ... feed terminal 36 ... switch 40 ... splitter module (1 input 1 output)

Claims (4)

An input terminal to which an antenna device is connected in the preceding stage and a signal output from the antenna device is input, an amplifying device that is connected to the input terminal and is capable of gain switching, and a distribution that distributes the output signal of the amplifying device to at least two And a first output terminal and a second output terminal for outputting signals distributed by the distributor, each of which can be connected to a tuner device at a subsequent stage,
The power of the amplifying device is supplied from the tuner device connected to the first output terminal via the first output terminal, and the second output terminal from the tuner device connected to the second output terminal. A splitter module, wherein a gain switching signal of the amplification device is supplied via   The splitter module according to claim 1, wherein power is supplied to the antenna device. A tuner device to which the splitter module according to claim 1 or 2 is connected in a preceding stage, a tuner input terminal connected to the first or second output terminal of the splitter module, and a power supply for the amplifying device A power supply circuit capable of selecting either a voltage or a gain switching signal and supplying the selected signal to the tuner input terminal,
When the splitter module is connected to the previous stage, a power supply voltage or a gain switching signal is supplied from the power feeding circuit to the amplification device via the tuner input terminal,
When the splitter module is not connected to the preceding stage, neither a power supply voltage nor a gain switching signal is supplied from the power feeding circuit. The antenna device includes an antenna capable of receiving satellite broadcast signals and a low noise block converter,
The power supply circuit is configured to be able to supply a power supply voltage for the low noise block converter to the tuner input terminal,
When the splitter module according to claim 2 is connected to the previous stage, a power supply voltage or a gain switching signal is supplied from the power feeding circuit to the amplification device via the tuner input terminal,
When the antenna device is directly connected to the tuner input terminal, the power supply voltage for the low noise block converter is supplied from the power feeding circuit to the low noise block converter via the tuner input terminal. The tuner device according to claim 3.

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