JPH1132317A - Amplifier for common reception installation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an amplifier for common reception installation that is available for both a line type and a head type. SOLUTION: In the case that a mixed signal of a common reception signal and a satellite intermediate frequency signal is received at an input terminal 4, the mixed signal is branched into the common reception signal and the satellite intermediate frequency signal by a separator 8. The common reception signal is amplified by an amplifier 12 and fed to an output terminal 18. The satellite intermediate frequency signal is fed to an amplifier 24 via a changeover switch 22, where the signal is amplified and the amplified signal is fed to the output terminal 18. In this case, a DC voltage of +24 V generated by a constant voltage adjustment device 28 is converted into +15 V by a constant voltage adjustment device 32. A voltage of +15 V or +24 V selected by a changeover switch 34 is given to the input terminal 4 via a switch 36 depending on the condition. In the case that the common reception signal is given to the input terminal 4 and the satellite intermediate frequency signal is given to an input terminal 6, the common reception signal is given to the output terminal 18 via the separator 8 and the amplifier 12 and the satellite intermediate frequency signal is fed to the output terminal 18 via the changeover switch 22 and the communication 24. In the case that a voltage of +15 V is applied to the input terminal 6, a switch 46 is closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an amplifier for a joint receiving facility, and more particularly, to superimposing a voltage for operating other equipment in the joint receiving facility on a transmission line connected to the amplifier. About what you can do.

[0002]

2. Description of the Related Art Heretofore, there is an amplifier for a joint receiving facility called an in-building amplifier. An in-building amplifier is used when multiple buildings are built, such as a public housing complex.
When forming a joint receiving facility in these multiple buildings,
An amplifier used in one building or used in a building when forming a joint receiving facility in one building.

[0003] There are two types of in-building amplifiers: a line type and a head type. The line type is provided in the transmission line of the joint receiving facility, and includes terrestrial waves such as UHF and VHF,
A mixed signal such as an intermediate frequency signal for satellite broadcasting and satellite communication is supplied, amplified and supplied to a transmission line. The head type is provided in the head which is the tip of the transmission line of the joint receiving facility, and the terrestrial wave, the satellite broadcasting, the intermediate frequency signal of the satellite communication, etc. are individually supplied,
These are amplified and then mixed and supplied to a transmission line.

[0004]

However, in the head-type in-building amplifier, a +15 V voltage as an operating power supply is supplied to the low-noise block converter of the antenna for receiving satellite broadcasting or satellite communication connected thereto. It can only be superimposed on the transmission line. Further, the line-type in-building amplifier can only receive power from another power supply device, and there is almost no power supply to the amplifier at the preceding or subsequent stage of this line-type in-building amplifier. Power supply had to be prepared.

An object of the present invention is to provide an amplifier for a joint receiving facility that can be used as a line type or a head type.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 uses a joint reception signal (for example, U
HF, VHF or other terrestrial waves, or additionally a television signal created exclusively for a joint reception facility, or this joint reception signal and a satellite intermediate frequency signal (satellite broadcast and / or satellite communication intermediate frequency signal) Has a first input terminal to which any one of the mixed signals is supplied. Furthermore, the first
When the joint reception signal is supplied to the input terminal of
A second input terminal to which the satellite intermediate frequency signal is supplied;
Is provided. Amplifying means for the joint reception signal supplied from the first input terminal, amplifying means for the satellite intermediate frequency signal, and an output terminal to which output signals of both amplifying means are also provided. Further, there is provided a signal selecting means for selecting the satellite intermediate frequency signal from the first or second input terminal and supplying the selected signal to the amplifying means for the satellite intermediate frequency signal. Further, power supply means is provided. The power supply means includes a first voltage for processing means (for example, frequency conversion means, more specifically, a low noise block converter) for processing the satellite intermediate frequency signal in the common receiving facility, and an amplification means (for example, for example, in the common receiving facility). And a second voltage for amplifying means for amplifying the joint reception signal or the mixed signal. Here, the joint receiving facility includes a transmission line provided from the head end to each terminal and various amplifiers, splitters, distributors, and the like interposed in these lines,
For example, when the common reception area extends over a plurality of buildings, not only the facilities in one building but also the facilities and headends in each building are included. The selected one of the first and second voltages is supplied to the first input terminal by the power supply selecting means. The first power supply selection means is disposed between the power supply selection means and the first input terminal and selected by the power supply selection means.
Alternatively, a first opening / closing means for switching between a state in which the second voltage is supplied to the first terminal and a state in which the second voltage is shut off, and a first opening / closing means disposed between the power supply means and the second input terminal, wherein the first voltage is supplied. A second opening / closing means for switching between a state of supply to the second input terminal and a state of cutoff is provided.

When the amplifier according to the first aspect of the present invention is used for a head, a joint input signal is supplied to a first input terminal, and a satellite intermediate frequency signal is supplied to a second input terminal. In this case, it is necessary to supply a first voltage to the satellite intermediate frequency signal processing means connected to the second input terminal in order to operate the signal. Therefore, the first voltage is supplied to the second input terminal via the second opening / closing means. At this time, there is a case where the means for amplifying the joint reception signal is connected before the first input terminal and a case where it is not connected. When it is connected, the second voltage is selected by the power supply selecting means, and the first opening / closing means is operated so that the second voltage is supplied to the first input terminal. When the common receiving signal amplifying means is not connected to the stage preceding the first input terminal, the first opening / closing means is operated so that the second voltage is not supplied to the first input terminal.

When used for a line, a mixed signal may be supplied to the first input terminal. In this case, the first input terminal may be connected to an amplifying means at a preceding stage. In order to operate the amplifying means, a second voltage is selected by the power supply selecting means, and the first opening / closing means is operated so as to supply the second voltage to the first input terminal.

In the case of use for a line, a mixed signal is also supplied to the first input terminal. Immediately before the first input terminal, mixing of the joint reception signal and the satellite intermediate frequency signal is performed, for example. It may be done in a mixer.
In this case, it is necessary to supply a first voltage from the first input terminal to the processing means of the satellite intermediate frequency signal via the mixer in order to operate the same. Therefore, the first voltage is supplied to the first input terminal by selecting the first voltage by the power supply selecting unit and operating the first switching unit.

According to a second aspect of the present invention, in the amplifier according to the first aspect, a third opening / closing means is provided between the output terminal and the power supply means.

According to the second aspect of the invention, by closing the third opening / closing means, the second voltage is supplied to the power supply means from another device connected to the output terminal at the subsequent stage, and the second voltage is supplied to the power supply means. The second voltage can be generated at the same time, or the second voltage can be supplied to the output terminal from the power supply means, and the second voltage can be supplied to other subsequent devices connected to the output terminal. Can also. Further, when the supply of the second voltage from the output terminal or when the second voltage is not supplied to the output terminal, the third opening / closing means is opened.

According to a third aspect of the present invention, in the amplifier according to the first or second aspect, the power supply unit generates a plurality of second voltages.

In the joint receiving facility, some of the amplifying means before or after the amplifier of the present invention operate at various voltages, for example, an AC voltage or a DC voltage. Claim 3
According to the invention described above, any means for amplifying a joint reception signal that operates with any of a plurality of types of voltages can be used.

[0014]

FIG. 1 to FIG. 3 show a first embodiment. The amplifier 2 for a joint receiving facility according to the first embodiment is a bidirectional amplifier for use in a building, and as shown in FIG.
, And a second input terminal 6.

The first input terminal 4 may be supplied with a joint reception signal. The joint reception signal is, for example, UHF,
It is a terrestrial television signal such as VHF, or a signal obtained by adding a television signal or the like created exclusively for the joint receiving facility. The first input terminal 4 may be supplied with a mixed signal of the joint reception signal and the satellite intermediate frequency signal in addition to the case where only the joint reception signal is supplied.

The satellite intermediate frequency signal is obtained by converting a satellite broadcasting signal and / or a satellite communication signal received by an antenna for receiving satellite broadcasting and / or satellite communication into signal processing means such as a low noise block converter attached to these antennas to, for example, 1 GHz. It is converted to a band intermediate frequency signal.

There are a case where the satellite intermediate frequency signal is supplied to the second input terminal 6 and a case where no signal is supplied at all.

A mixed signal is supplied to a first input terminal 4,
As a case where no signal is supplied to the second input terminal 6, there is a case where the amplifier 2 is used as a line type. As shown in FIG. 2, a mixed signal is supplied from the amplifier 2a in the preceding stage. .

This mixed signal is supplied to a separator 8 for the joint reception signal and the satellite intermediate frequency signal, for example, a duplexer.
It is separated into a joint reception signal and a satellite intermediate frequency signal. The separated common reception signal is supplied to a common reception signal amplifying means, for example, a downstream signal amplifier 12, via a separator 10 for an upstream signal and a downstream signal, and is amplified by the same. , Are supplied to an output terminal 18 via a separator 16 of a joint reception signal and a satellite intermediate frequency signal.

The output terminal 18 is supplied with an upstream signal (a signal transmitted from each terminal to the head side) from the terminal side, and a separator 1 for separating the common reception signal and the satellite intermediate frequency signal.
6. The signal is supplied to the upstream signal amplifier 20 via the separator 14 for the upstream signal and the downstream signal, and after being amplified there, the separator 10 for the upstream signal and the downstream signal, and the separator for the common reception signal and the satellite intermediate frequency signal. The signal is supplied to the first input terminal 4 via the second input terminal 8 and supplied to the amplifier 2a in the preceding stage.

The satellite intermediate frequency signal separated by the separator 8 between the joint reception signal and the satellite intermediate frequency signal is supplied to a contact 22a of a manual change-over switch 22.
The signal is supplied to a satellite intermediate frequency signal amplifying means, for example, a satellite intermediate frequency signal amplifier 24, via a contact 22b which is brought into contact with 2a. This satellite intermediate frequency signal amplifier 2
Reference numeral 4 amplifies the input satellite intermediate frequency signal, supplies the amplified signal to the output terminal 18 via the separator 16 for the joint reception signal and the satellite intermediate frequency signal, and supplies the same to the subsequent line-type amplifier. The changeover switch 22 and the separator 8 for the joint reception signal and the satellite intermediate frequency signal constitute signal selection means.

In the amplifier 2, there is provided a constant voltage regulator 28 for converting a commercial AC voltage of 100V into a voltage of DC 24V. The output voltage (+
24V) is supplied to the downstream signal amplifier 12 and the upstream signal amplifier 20 via the backflow prevention diode 30. Further, a + 24V DC voltage is supplied to a constant voltage regulator 32 which generates a + 15V DC voltage from the + 24V DC voltage. The DC voltage of +15 V is supplied to the satellite intermediate frequency signal amplifier 24 in order to operate the amplifier. These constant voltage regulators 28 and 32 constitute power supply means.

The DC voltage of +24 V passed through the backflow prevention diode 30 is supplied to a power source selecting means, for example, a contact 34 a of a changeover switch 34. A +15 V DC voltage from the constant voltage regulator 32 is supplied to a contact 34 b of the changeover switch 34. Contact 3 of changeover switch 34
Reference numeral 4c can be brought into contact with either of the contacts 34a and 34b by manual operation, and is connected to the first input terminal 4 via first opening / closing means, for example, an opening / closing switch 36 and a high-frequency blocking coil 38.

As described above, since the mixed signal is supplied to the first input terminal 4 from the amplifier 2a at the preceding stage, a DC voltage of +24 V is applied to the first input terminal 4 to operate the amplifier 2a. The contact 34c is brought into contact with the contact 34a so as to be supplied. Incidentally, 54, 56, 58
Is a DC blocking capacitor.

Although the mixed signal is supplied to the first input terminal 4, as shown in FIG. 3, in the mixer 40 provided before the amplifier 2, the joint reception signal and the satellite intermediate frequency signal are mixed. Sometimes. For example, such a case may occur when the amplifier 2 is located at the front end of the transmission line of the joint receiving facility. In this case, the amplifier 2 is connected to a satellite intermediate frequency signal processing means connected to the mixer 40, for example, a low noise block converter 42 (which is attached to a satellite broadcasting and / or satellite communication receiving antenna 44). It is necessary to supply the operating voltage from. Generally, the low noise block converter 42 is designed to operate with a DC voltage of + 15V. Therefore, the contact 34c of the changeover switch 34 of the amplifier 2 is connected to the contact 34b.
Side, and the changeover switch 3
4, a DC voltage of +15 V is supplied to the low noise block converter 42 via the on / off switch 36, the high frequency blocking coil 38, the first input terminal 4, and the mixer 40.

In the amplifier 2, the output side of the constant voltage regulator 32 is supplied to the second input terminal 6 via second opening / closing means, for example, an opening / closing switch 46 and a high frequency blocking coil 48. . Further, the input side of the constant voltage regulator 32 and the contact 34a of the changeover switch 34 are connected to third opening / closing means, for example, the opening / closing switch 50 and the high-frequency blocking coil 52.
And is connected to the output terminal 18 via.

This is for the case where, for example, the amplifier 2 is used as the preceding amplifier 2a shown in FIG. That is, the amplifier 2 is used as a head type. In this case, in the amplifier 2a, the joint reception signal is supplied to the first input terminal 4, and the satellite intermediate frequency signal is supplied to the second input terminal 6 from the low noise block converter 42. In order to operate the low noise block converter 42, the +2 signal supplied from the amplifier 2 to the output terminal 18
The 4 V DC voltage is supplied to the constant voltage regulator 32 via the high-frequency blocking coil 52 and the on / off switch 50, is converted into a +15 V DC voltage, and is closed.
6. The high frequency blocking coil 48 and the second input terminal 6 are supplied to the low noise block converter 42 via the second input terminal 6, which is operated to supply the satellite intermediate frequency signal to the input terminal 6. In this case, the constant voltage regulator 28 is not operated.

In this case, whether or not a DC voltage of +24 V is supplied to the first input terminal 4 depends on the situation. For example, an amplifier for amplifying the joint reception signal is provided at a stage preceding the amplifier 2a. When the amplifier does not include a power supply, the contact 34c of the changeover switch 34 is connected to the contact 3
Switch to the 4a side and close the open / close switch 36. First
Is connected to an antenna such as UHF or VHF, it is not necessary to supply an operating voltage of +24 V to the first input terminal 4. In this case, the open / close switch 36 is opened.

In this embodiment, a DC voltage of +24 V is supplied from the amplifier 2 to the amplifier 2a.
It is also possible to supply a DC voltage of +24 V from the amplifier 2 to a subsequent amplifier (not shown). In that case, the open / close switch 50 may be closed. However, it is necessary to configure the subsequent amplifier to operate with the +24 V DC voltage supplied from the input side. Further, when the DC voltage of +24 V is not supplied to the subsequent amplifier, or when the DC voltage of +24 V is not supplied from the subsequent amplifier, the open / close switch 50 may be opened.

As described above, this amplifier 2 can be used either as a line type or as a head type. Therefore, a joint receiving facility can be constituted only by this amplifier 2 without using another type of amplifier. Further, if the joint receiving facility is constituted only by the amplifier 2, if the amplifier which has been used as the head type needs to be used as the line type, for example, by changing the configuration of the joint receiving facility, or Conversely, even when the amplifier 2 used as a line type must be used as a head type, the changeover switch 2
2, 34 and switching of the open / close switches 36, 46, 50 can be dealt with.

In the above embodiment, the DC voltage of +24 V can be supplied from the first input terminal 4 to the amplifier in the preceding stage. However, if the amplifier at the preceding stage is, for example,
In some cases, it is configured to operate by receiving the supply of the voltage V. In such a case, an amplifier 102 for a joint receiving facility according to the second embodiment as shown in FIG. 4 can be used.

In the common receiving facility amplifier 102, the power supply means includes a transformer 280, constant voltage regulators 300 and 32.
0, and the power supply selecting means is a switch 3
The configuration is the same as that of the first embodiment except for the configuration of the first embodiment. The same parts are denoted by the same reference numerals, and description thereof will be omitted.

The transformer 280 transforms a commercial AC voltage of 100 V into an AC voltage of 30 V.
The voltage is supplied to the constant voltage regulator 300 and converted to a DC voltage of + 24V. This +24 V DC voltage is supplied as an operating voltage to the downstream signal amplifier 12 and the upstream signal amplifier 20, and is also supplied to the constant voltage regulator 320, and is supplied to the +15 V
V DC voltage. This +15 V DC voltage is supplied to the satellite intermediate frequency signal amplifier 24 as an operating voltage.

The 30 V AC from the transformer 280 is supplied to the contact 340 d of the changeover switch 340, and the +24 V DC voltage of the constant voltage regulator 300 is supplied to the changeover switch 340.
340a of the constant voltage regulator 320
The DC voltage of 5V is applied to the contact 340b of the changeover switch 340.
Is supplied to Contact 340 of changeover switch 340
“c” is connected to the first input terminal 4 via an open / close switch 36 and a high-frequency blocking coil 38. The open / close switch 50 is connected to the contact 340d. Output terminal 18
May be supplied with a voltage of 30 V AC from the subsequent stage, and 30 V AC from the latter stage may be supplied to the input side of the constant voltage regulator 300 and the contact 340 d.

This amplifier 102 operates similarly to the amplifier 2 of the first embodiment. However, in the amplifier of the first embodiment, the first input terminal 4 is connected to +24 V or +15 V.
V could be supplied, but the second
In the amplifier 2 of the embodiment, the DC voltage of +24 V, +
Either a DC voltage of 15V or an AC voltage of 30V can be supplied by manually operating the contact 34c.

In each of the above embodiments, the present invention is applied to the amplifier for the bidirectional joint receiving facility. However, the present invention can be applied to the amplifier for the joint receiving facility dedicated to the down direction.

[0037]

As described above, according to the first aspect of the present invention, the first voltage for the processing means of the satellite intermediate frequency signal in the common receiving facility and the first voltage for the amplifying means in the common receiving facility are provided. The power supply means generates the second voltage and the power supply selection means supplies the selected one of the first and second voltages to the first input terminal. Whether the device connected to the terminal is the processing means for the satellite intermediate frequency signal or the amplifying means, it can be handled only by operating the power supply selecting means. Also, the power supply selecting means and the first
Since the first opening / closing means is provided between the input terminal and
It is also possible to cope with a case where power supply to the first input terminal side is unnecessary. Since the second opening / closing means is provided between the power supply means and the second input terminal, it is possible to cope with the case where power supply to the second input terminal is not required. Therefore, the amplifier for the joint receiving facility can be used as a line type or a head type, and it is not necessary to manufacture each type individually. Further, even if the configuration of the joint receiving facility is changed, the signal selecting means and the power source selecting means, the first and second
By operating the opening / closing means, the one that has been used as a line type can be used as a head type, and the one that has been used as a head type can be used as a line type. Therefore, it is not necessary to replace the amplifier, and the configuration of the joint receiving facility can be changed smoothly.

According to the second aspect of the present invention, by opening and closing the third opening / closing means, a state where the second voltage is supplied from the output terminal side, and a second voltage is supplied to the output terminal side. The state can be switched to a state in which the second voltage is not supplied from the output terminal side or a state in which the second voltage is not supplied to the output terminal side, so that the system design of the joint receiving facility can be easily performed.

According to the third aspect of the present invention, since the power supply means generates a plurality of second voltages, the power supply voltage is supplied from the amplifier for the common receiving facility or the former stage of the amplifier for the common receiving facility or Even if the amplifier provided at the subsequent stage operates at any one of a plurality of voltages, the amplifier can be operated.

[Brief description of the drawings]

FIG. 1 is a block diagram of an amplifier for a joint receiving facility according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an example of use of the common receiving facility amplifier.

FIG. 3 is a block diagram showing another example of the use of the common receiving facility amplifier.

FIG. 4 is a block diagram of an amplifier for a joint receiving facility according to a second embodiment of the present invention.

[Explanation of symbols]

2 102 Amplifier for common reception facility 4 First input terminal 6 Second input terminal 8 Separator between common reception signal and satellite intermediate frequency signal (signal selection means) 12 Downlink signal amplifier (common reception signal amplification means) 18 Output Terminal 22 Changeover switch (signal selection means) 24 Satellite intermediate frequency signal amplifier (Satellite intermediate frequency signal amplification means) 28 32 300 320 Constant voltage regulator (Power supply means) 34 340 Changeover switch (Power supply selection means) 36 Open / close switch (No. 1 open / close means) 46 open / close switch (second open / close means) 50 open / close switch (third open / close means) 280 transformer (power supply)

Claims (3)

[Claims] 1. A first input terminal to which either a joint reception signal or a mixed signal of the joint reception signal and a satellite intermediate frequency signal is supplied, and when the joint reception signal is supplied to a first input terminal, A second input terminal to which the satellite intermediate frequency signal is supplied; an amplifying unit for the joint reception signal supplied from a first input terminal; an amplifying unit for the satellite intermediate frequency signal; An output terminal to which a signal is supplied; a signal selecting unit that selects the satellite intermediate frequency signal from a first or second input terminal and supplies the satellite intermediate frequency signal to an amplifying unit for the satellite intermediate frequency signal; Power supply means for generating a first voltage for the processing means of the satellite intermediate frequency signal and a second voltage for the amplification means in the common receiving facility; and a selected one of the first and second voltages. Supply to the first input terminal That a power supply selection means, a first switching means disposed between the power supply selection means and the first input terminal, is disposed between the power supply means and the second input terminal, a first
An amplifier for a shared receiving facility, comprising: a second opening / closing means for switching between a state in which the voltage is supplied to the second input terminal and a state in which the voltage is cut off. 2. The amplifier according to claim 1, wherein a third opening / closing means is provided between said output terminal and said power supply means. 3. The amplifier for a shared reception facility according to claim 1, wherein said power supply means generates a plurality of second voltages.