JP2008118444A - Amplifier for television reception - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily perform the installation work of an apparatus in a short time when a plurality of reception antennas are used, which receive the television broadcast radio waves of the same frequency band or when a plurality of arrangement places exist for a reception terminal, concerning a television broadcast receiving system. <P>SOLUTION: A booster 9 for amplifying a reception signal includes: a VHF input terminal 13 for inputting a VHF reception signal; UHF input terminals 14, 15 for inputting the respective reception signals of a UHF analog broadcast and a UHF digital broadcast; a BS/CS input terminal 16 for inputting a BS/CS-IF signal; and two output terminals 17, 57. Signals inputted to the respective input terminals 13-16 are amplified to an appropriate level by an internal amplifier circuit, and output from the two output terminals 17, 57. DC voltages input to the output terminals 17, 57 from a terminal side are separated from the reception signals, so as to be used for the generation of a power source voltage and power feeding to a BS/CS converter. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a television receiving amplifying device for amplifying a television broadcast reception signal.

  Amplifying devices (so-called boosters) that amplify television broadcast reception signals are typically used to input reception signals from reception antennas that receive various types of television broadcast radio waves, such as VHF antennas, UHF antennas, and BS / CS antennas. A plurality of input terminals are provided. The booster is configured to amplify and mix the received signals input to these input terminals and output from one output terminal.

Also, a terminal that receives television broadcast waves of the same frequency band (for example, UHF band analog broadcast waves and digital broadcast waves) transmitted from a plurality of broadcast stations located in different directions when viewed from the reception point In the receiving system that transmits to the side, a mixer that mixes the received signals from the two antennas installed toward each of these broadcasting stations is used (see, for example, Patent Document 1).
JP 2005-20135 A

  For this reason, for example, as shown in FIG. 8, using a VHF antenna 3, a first UHF antenna 5, a second UHF antenna 6, and a BS / CS antenna 7, a VHF band television broadcast and a UHF band analog are provided. When constructing a receiving system 101 that receives television broadcasting, UHF band digital television broadcasting, and BS / CS broadcasting, the two UHF antennas 5, 6 are combined with the antennas 3, 5, 6, 7. A mixer 103 for mixing the received signal from the signal, and a filter 102 for removing an unnecessary signal input to the mixer 103 are installed in the support column 2, and the UHF signal mixed in the mixer 103 , The received signal (VHF signal) from the VHF antenna 3 and the received signal (BS / CS signal) output from the converter 8 of the BS / CS antenna 7 are respectively coaxial cables. Via the feed line 4 such as Bull, input to the input terminal of each signal of the booster 104 which is separately provided to the support 2, so that the output to the terminal side by amplifying each received signal at its booster 104.

  Therefore, in this case, a large number of electronic devices such as the antennas 3, 5, 6, and 7, the filter 102, the mixer 103, and the booster 104 are installed on the support column 2, and further, the feeder line 4 that connects these parts is drawn. Since it is rotated, there are problems that the reception point equipment around the support column 2 is not clean and unpleasant, and that the construction for installing these devices is complicated. In addition, as the construction becomes complicated, there arises a problem that it becomes easy to induce a wiring mistake and that the level adjustment of each signal output from the booster 104 becomes troublesome.

  On the other hand, since there is only one output terminal of the booster 104, as in the reception system 101 shown in FIG. 8, the signal amplified by the booster 104 is received by a tuner 68 or a television receiver installed in different rooms. In the case of transmission to 69 and 70, a distributor 67 such as a two distributor is connected to the output terminal of the booster 104 to form a signal transmission path for each room. In such a case, the construction of installing the equipment is further complicated, and accordingly, there arises a problem that a wiring mistake is easily induced and the level adjustment becomes more troublesome.

  The present invention has been made in view of such problems, and in a receiving system that transmits a television broadcast reception signal to a terminal side, when a plurality of reception antennas that receive television broadcast radio waves in the same frequency band are used, It is an object of the present invention to allow equipment installation work to be easily performed in a short time when there are a plurality of apparatus installation locations.

  In order to achieve the above object, the invention according to claim 1 is a television receiving amplifying device for amplifying received signals of various television broadcasts, and UHF for inputting received signals of UHF band television broadcasts. An input terminal, a BS / CS input terminal for inputting at least one received signal of BS broadcast and CS broadcast, an amplifier circuit for amplifying the received signal input to each input terminal, and amplification by the amplifier circuit Distributing / branching means for distributing or branching the received signals to a plurality of signal paths, a plurality of output terminals for outputting the received signals distributed or branched to the signal paths from the distributing / branching means, Power supply separating means for separating the DC voltage superimposed on the output terminal from the received signal, and the DC voltage separated by the power supply separating means is synthesized and supplied to the amplifier circuit or other electrical load. A DC voltage synthesizing means, characterized by comprising a.

  Next, according to a second aspect of the present invention, there is provided the television receiving amplifying device according to the first aspect, further comprising a VHF input terminal for inputting a reception signal of a VHF band television broadcast, wherein the amplifier circuit includes: In addition to the UHF reception signal and the BS / CS reception signal input to the UHF input terminal and the BS / CS input terminal, the VHF reception signal input to the VHF input terminal is also amplified.

  According to a third aspect of the present invention, in the television receiving amplifying device according to the first or second aspect, the UHF input terminal includes a plurality of UHF input terminals, and each UHF input terminal receives a UHF received signal having a different frequency band. It is configured to allow input.

  According to a fourth aspect of the present invention, in the television receiving amplifying device according to any of the first to third aspects, at least one of signal paths from the distributing / branching means to the output terminals is provided. In addition, signal level adjusting means for adjusting the signal level of the received signal flowing through the signal path is provided.

  According to a fifth aspect of the present invention, in the television reception amplifying device according to any one of the first to fourth aspects, one of the output terminals monitors a signal output from another output terminal. It is a monitor terminal for this.

  Furthermore, the invention according to claim 6 is the television receiving amplifying device according to any one of claims 1 to 5, wherein two output terminals are provided as the plurality of output terminals. To do.

  According to the television reception amplifying device according to claim 1, since the plurality of output terminals are provided as output terminals for outputting the reception signal amplified by the amplifier circuit, the reception signal is transmitted to the terminal side. When there are a plurality of places (rooms) to be used, a necessary transmission path can be formed without connecting a distributor or a branching device to the output terminal of the amplification device.

  Therefore, if the television reception amplifying device of the present invention is used, the number of devices used for constructing a reception system for transmitting received signals to a plurality of locations is reduced, and the installation work can be performed in a short time. Will be able to. In addition, the wiring from the television receiving amplifying device to the terminal side is clear, and wiring mistakes can be prevented.

  In addition, since the television receiving amplifying device of the present invention is provided with the power source separating means and the DC voltage synthesizing means, the DC voltage supplied to any or all of the plurality of output terminals is supplied. By utilizing this, power can be supplied to an amplifier circuit and other electric loads (for example, a converter of a BS / CS antenna connected to a BS / CS input terminal).

  In addition, even if trouble occurs in the power supply system to one output terminal, power can be supplied from the other output terminal, so that the reception signal can be received by operating the television reception amplifying device and the BS / CS antenna normally. Transmission can be continued.

  Next, the television reception amplifying device according to claim 2 is provided with a VHF input terminal in addition to the UHF input terminal and the BS / CS input terminal, and the amplifier circuit includes the UHF input terminal and the BS / CS input terminal. In addition to the UHF reception signal and BS / CS reception signal input to the input terminal, the VHF reception signal input to the VHF input terminal is also amplified. For this reason, by using the television reception amplifying device of the present invention, it is possible to transmit an analog broadcast broadcast signal distributed using a VHF band broadcast wave to the terminal side.

Next, according to the third aspect of the present invention, there is provided a plurality of UHF input terminals that can input UHF reception signals having different frequency bands.
For this reason, UHF band television broadcast waves (for example, terrestrial analog broadcast broadcast waves and terrestrial digital broadcast broadcast waves) transmitted from a plurality of broadcasting stations located in different directions when viewed from the reception point are respectively received by different receiving antennas. When constructing a reception system that receives a signal from a (UHF antenna) and transmits the received signal to the terminal side, the reception signal from each UHF antenna may be input to each of a plurality of UHF input terminals. In addition, it is not necessary to separately provide a mixer or a filter for mixing the received signals from the respective UHF antennas.

  Therefore, according to the television receiving amplifying device of claim 3, a receiving system capable of receiving UHF band television broadcast waves transmitted from a plurality of broadcasting stations located in different directions when viewed from the reception point is constructed. If it is used, the number of devices used in the receiving system can be reduced, and the installation work can be easily performed in a short time. In addition, the wiring from each UHF antenna to the television receiving amplifying device is clear, and wiring mistakes can be prevented.

  According to a fourth aspect of the present invention, there is provided a television receiving amplifying apparatus for adjusting a signal level of a reception signal flowing through the signal path to at least one of signal paths from the distributing / branching means to each output terminal. The signal level adjusting means is provided.

  Therefore, according to the television reception amplifying device of the fourth aspect, the loss due to the length of the cable connected to the output terminal can be reduced by adjusting the signal level of the received signal by operating the signal level adjusting means. It is possible to prevent the signal level of the received signal to the receiving terminal apparatus from deviating from an appropriate level due to loss or the like caused by equipment provided on the terminal-side transmission path.

  In the television reception amplifying device of the present invention (claims 1 to 4), it is not necessary to connect a transmission path for transmitting a reception signal to the terminal side to all of the plurality of output terminals. As described in claim 5, one of the output terminals may be used as a monitor terminal for monitoring a signal output from another output terminal.

  And when one of the output terminals is used as a monitor terminal in this way, the branching means is set so that the output level of the received signal from the monitor terminal is smaller than the output level from the other output terminals. Through which a part of the received signal output to the output terminal is branched to the monitor terminal, or the output level of the received signal from the monitor terminal is a predetermined level relative to the output level from other output terminals It is preferable to provide an attenuator (attenuator) in the transmission path of the received signal to the monitor terminal so as to be lower by only (for example, 20 dB).

  The monitor terminal can also be used as an output terminal for transmitting the received signal to the terminal side. In this case, the terminal is used as a monitor terminal and as an output terminal. It is preferable that the output level of the received signal from can be switched.

  In addition, the number of output terminals provided in the television reception amplifying device of the present invention (Claims 1 to 5) may be any number as long as it is plural, but the television reception amplifying device is used in general households. Considering this, the number of output terminals may be two as described in claim 6.

  In other words, in this way, the output path of the reception signal from the television reception amplifying device can be made into two systems, and the cable constituting each output path can be drawn into the building, and if necessary, the building Since it is only necessary to provide a branch or distributor in the cable drawn in and separate the received signal into a plurality of paths, if the television receiving amplifier of the present invention is used in a general household, the number of output terminals is It is thought that about two is sufficient. Note that the number of output terminals may be set as appropriate according to the application of the television receiving amplifier, and is not limited to two.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram illustrating the overall configuration of a television broadcast receiving system 1 according to an embodiment.
In the receiving system 1 shown in FIG. 1, the same components as those in the conventional receiving system 101 shown in FIG.

  As shown in FIG. 1, a column 2 includes a VHF antenna (which may include an FM band) 3, a first UHF antenna 5, a second UHF antenna 6, a BS / CS antenna 7, and the television of the present invention. A booster 9 as a receiving amplifying device is installed, and the outputs of the antennas 3, 5, 6, and 7 are directly connected to the booster 9 by a feed line 4 such as a coaxial cable.

  Further, the booster 9 is provided with two output terminals, and the output from each of these output terminals (that is, the amplified received signal) passes through the two feeders 4 made of coaxial cables or the like, and is housed. Are respectively transmitted to the receiving terminal devices (the tuner 68, the television receiver 69, and the television receiver 70) installed in each room.

  The booster 9 is connected to the booster 9 and the converter 8 of the BS / CS antenna 7 connected to the booster 9 from the tuner 68 on the terminal side, the television receivers 69 and 70, or a power supply unit (not shown). As a voltage power supply, for example, a power supply voltage of DC 15 V is supplied.

  As described above, in the receiving system 1 of the present embodiment, the VHF antenna 3, the first UHF antenna 5, the second UHF antenna 6, and the BS are mounted on the support column 2 as in the conventional receiving system 101 illustrated in FIG. / CS antenna 7 is installed, but the output from each of these antennas 3, 5, 6, and 7 is directly input to booster 9 via dedicated feed line 4, and Since the amplified reception signal is transmitted through the dedicated power supply line 4 in the room, compared to the conventional reception system 101, fewer devices are used and the wiring of the power supply line 4 is clean.

Next, FIG. 2 is a front view showing a state in which the booster 9 installed in the column 2 is viewed from the front with the lid 11 of the case 10 opened.
Hereinafter, the input terminals 13 to 16, the output terminals 17 and 57, the input switching, the level adjustment and the like of the booster 9 will be described with reference to FIG. In the following description, the upper and lower parts represent the upper and lower parts in a state where the booster 9 is installed on the column 2 corresponding to FIG.

  As shown in FIG. 2, the shield case 12 containing the amplifier circuit of the booster 9 and the like is housed in the case 10 of the booster 9. The case 10 is a box-like case having an open front surface, and a lid 11 is attached to the upper side of the case 10 so as to be opened and closed.

  In addition, on the lower side wall of the case 10, in order from the left, a VHF input terminal 13 for inputting a reception signal (VHF reception signal) from the VHF antenna 3 and a reception signal (analog broadcasting signal) from the first UHF antenna 5. A UHF reception signal (hereinafter referred to as a UHF analog signal) for receiving a first UHF input terminal 14 and a reception signal from the second UHF antenna 6 (digital broadcast UHF reception signal: hereinafter referred to as a UHF digital signal). A second UHF input terminal 15 for inputting, a BS / CS input terminal 16 for inputting a BS / CS reception signal (BS / CS-IF signal) output from the converter 8 of the BS / CS antenna 7, One output terminal 17 and a second output terminal 57 are arranged. These terminals are attached to the shield case 12 with F-type plug seats.

Next, a switch 19 is provided on the left side of the shield case 12 to turn on or off the FM trap circuit provided in the VHF reception signal input circuit.
On the right side of these switches are received signals of VHF low channel (VHF (L)), VHF high channel (VHF (H)), UHF analog, UHF digital, BS / CS-IF (CS / BS-I). The first to fifth input level adjustment switches 20, 22, 24, 26, and 27 that can adjust the input level in two stages of 0 dB and −10 dB are arranged, and by operating these switches, The signal level input to each input terminal can be adjusted.

  The switching of the attenuation amount by each of the switches 20, 22, 24, 26, and 27 is not limited to two steps of 0 dB and −10 dB, and the attenuation amount is 0 dB, −5 dB, −10 dB, 0 dB, −10 dB, − You may set so that it can switch to 3 steps | paragraphs or more like 15 dB.

  Next, on the right side of each of the switches 20, 22, 24, 26, and 27, the gain for amplifying the received signal in each frequency band of VHF low channel, VHF high channel, UHF, and BS / CS-IF is manually set. The first to fourth gain adjustment volumes 21, 23, 25, and 28 are provided for adjustment in the above.

  Each of these gain adjustment volumes 21, 23, 25, 28 constitutes a variable attenuator, and the gain adjustment range (in other words, the attenuation adjustment range) by each gain adjustment volume 21, 23, 25, 28 is as follows. , Approximately 0 to -10 dB. The gain adjustment range may be 0 to -15 dB, 0 to -20 dB.

  In addition, a lamp (energization display LED) 29 for indicating that a low voltage power source, which is a power source of the booster 9, is supplied to one or both of the output terminals 17 and 57 is provided at the upper right of the shield case 12. It has been. This display means also displays whether or not power is supplied to the BS / CS input terminal 16.

Next, the configuration of the amplifier circuit housed in the shield case 12 will be described with reference to FIG.
In the following description, BEF represents a band elimination filter (band eliminator), BPF represents a band pass filter (band pass filter), LPF represents a low pass filter (low pass filter), and HPF represents a wide pass filter. (High-pass filter).

  First, the UHF analog signal input to the first UHF input terminal 14 is transmitted via the BPF 39 to the BEF 40 for blocking the mobile phone communication signal. As another method for blocking the mobile phone communication signal, a trap circuit may be provided instead of the BEF 40, and it may be turned on and off by a switch provided on the panel.

  The UHF digital signal input to the second UHF input terminal 15 is transmitted via the fourth input level adjustment switch 26 to the BPF 43 that passes the UHF channels 19 to 21.

  Then, the UHF digital signal that has passed through the BPF 43 and the UHF analog signal that has passed through the BPF 39 and BEF 40 are mixed with each other and input to the third input level adjustment switch 24, the third input level adjustment switch 24, and the UHF ch13. ˜Amplifier 41 capable of amplifying ch62 signal (that is, UHF reception signal), third gain adjustment volume 25 (more specifically, variable attenuator configured by third gain adjustment volume 25), and UHF ch13˜ The signal is input to the mixer 56 via the amplifier 42 that can amplify the ch62 signal (that is, the UHF reception signal).

  The mixer 56 includes an LPF 44 that passes broadcast signals (VHF reception signals) of VHF ch1 to ch12 (including FM) and an HPF 45 that passes UHF ch13 to ch62, and outputs from the amplifier 42. The received UHF reception signal is mixed with the VHF reception signal that has passed through the LPF 44 by being input to the HPF 45.

  On the other hand, the BPF 39, the BEF 40, and the BPF 43 operate as a mixer that mixes the UHF analog signal and the UHF digital signal. The BPF 39 allows all UHF television broadcast channels (ch13 to ch62) to pass, and the passing frequency band is set to 470 MHz to 810 MHz as illustrated in FIG. 4A.

  Note that the upper limit of the pass frequency band of the BPF 39 may be 770 MHz, or an HPF having a lower limit of the pass frequency band of 470 MHz may be used instead of the BPF 39, but a frequency higher than 810 MHz is used for mobile phone communication. Therefore, in this embodiment, in order to avoid this interference, a BPF having a pass frequency band of 470 MHz to 810 MHz is used.

  Moreover, the blocking frequency band of the BEF 40 is set to 506 MHz to 524 MHz as shown in FIG. 4B, and the passing frequency band of the BPF 43 is set to 506 MHz to 524 MHz as shown in FIG. 4C. Has been. This is an example in the case of receiving digital terrestrial broadcasting in the Osaka area.

  As a result, in the mixer composed of the BPF 39, BEF 40, and BPF 43, the UHF analog signal and the UHF digital signal input to the first UHF input terminal 14 and the second UHF input terminal 15 are mixed without interference. The

  As for the BPF 39 and BEF 40 provided on the first UHF input terminal 14 side, the BPF 39 is replaced with an HPF having a lower limit of the pass frequency band of 524 MHz, and the BEF 40 is replaced with an LPF having an upper limit of the pass frequency band of 506 MHz. May be.

  In other words, since terrestrial digital broadcast channels are concentrated in many regions below the UHF band, if the pass frequency bands of these filters are matched to the respective regions, UHF analog signals and UHF digital signals are combined. Can be mixed optimally without interference.

  Next, the VHF reception signal input to the VHF input terminal 13 includes an LPF 31 that passes VHF ch1 to ch3 (which may include FM broadcast signals) and an HPF 35 that passes VHF ch4 to ch12. The signal is transmitted to the demultiplexer 53 and demultiplexed into a VHF (L) signal and a VHF (H) signal. The duplexer 53 may be composed of a BPF that passes the VHF channels 1 to 3 and a BPF that passes the VHF channels 4 to 12 instead of the LPF 31 and the HPF 35.

  The VHF (L) signal that has passed through the LPF 31 of the duplexer 53 is an input composed of an FM trap circuit 32 for FM broadcast signal suppression and a switch 19 that turns the FM trap circuit 32 on or off. The signal is input to the amplifier 33 via the circuit, the first input level adjustment switch 20, and the first gain adjustment volume 21 (specifically, a variable attenuator configured by the first gain adjustment volume 21).

  The amplifier 33 is configured to be able to amplify a signal having a frequency of 76 MHz to 108 MHz (that is, a VHF (L) signal including a reception signal of FM radio broadcast). The VHF (L) signal amplified by the amplifier 33 Is transmitted to the mixer 54.

  On the other hand, the VHF (H) signal that has passed through the HPF 35 of the duplexer 53 is constituted by a second input level adjustment switch 22 and a second gain adjustment volume 23 (specifically, the second gain adjustment volume 23). Through the variable attenuator).

  The amplifier 37 is configured to be able to amplify the VHF ch4 to ch12 signals (that is, the VHF (H) signal), and the VHF (H) signal amplified by the amplifier 37 is transmitted to the mixer 54. The

  The mixer 54 includes an LPF (or BPF) 34 that passes VHF ch1 to ch3 (which may include FM broadcast signals) and an HPF (or BPF) 38 that passes VHF ch4 to ch12. The VHF (L) signal and VHF (H) signal amplified by the amplifiers 33 and 37 are mixed with each other by being input to the LPF 34 and the HPF 38, respectively, and output from the mixer 54 as a terrestrial reception signal. .

The VHF reception signal output from the mixer 54 is input to the LPF 44 of the mixer 56, mixed with the UHF reception signal by the mixer 56, and then input to the mixer 52.
Next, the BS / CS-IF signal input to the BS / CS input terminal 16 is an HPF (or BPF) 47 that passes a signal of 1032 MHz to 2655 MHz (that is, a BS / CS-IF signal), a fifth input. Level adjustment switch 27, amplifier 48 for amplifying the BS / CS-IF signal, fourth gain adjustment volume 28 (specifically, a variable attenuator configured by the fourth gain adjustment volume), and BS / CS-IF The signal is input to the mixer 52 through an amplifier 49 that amplifies the signal.

  The mixer 52 includes an LPF (or BPF) 50 that allows a VHF reception signal and a UHF reception signal (terrestrial reception signal) to pass, and an HPF (or BPF) 51 that allows a BS / CS-IF signal to pass. The terrestrial reception signal output from the mixer 56 and the BS / CS-IF signal output from the amplifier 49 are mixed with each other by being input to the LPF 50 and the HPF 51, and mixed as a broadcast reception signal. Output from the device 52.

  The broadcast reception signal output from the mixer 52 is distributed to two systems by a distribution unit 58 serving as distribution / branching means and transmitted to the output terminals 17 and 57. From the output terminals 17 and 57 to the outside. Is output.

  In addition, on the transmission path of the received signal from the distribution unit 58 to each of the output terminals 17 and 57, the DC voltage (about 15V) superimposed on each of the output terminals 17 and 57 from the terminal side is separated from the received signal, respectively. A power supply separation circuit 59 is provided. The power supply separation circuit 59 corresponds to the power supply separation means of the present invention.

  The DC voltages separated by the power supply separation circuits 59 are respectively input to the power supply circuit 61 via the diodes 60 serving as DC voltage synthesis means, and the power supply circuit 61 receives the amplifiers 33, 37, 42, 49. Is used to generate a driving voltage (DC constant voltage: DC 15 V).

  The DC voltage separated by each power supply separation circuit 59 is input to the other end of the LPF 46 having one end connected to the BS / CS input terminal 16 via the diode 60. That is, the DC voltage separated by each power supply separation circuit 59 is transmitted to the BS / CS input terminal 16 via the diode 60 and the LPF 46, and the BS / CS antenna 7 connected to the BS / CS input terminal 16. A power supply voltage is supplied to the converter 8.

  A lamp (energization display LED) 29 is connected to a connection point between the diode 60 and the LPF 46, and a DC voltage is separated by at least one of the power supply separation circuits 59 connected to the output terminals 17 and 57. Then, the lamp 29 is turned on.

  Here, the diode 60 is for preventing a current from flowing from the output terminal 17 to the output terminal 57 or from the output terminal 57 to the output terminal 17, and the LPF 46 prevents the reception signal from passing, It is for passing only voltage.

  In the present embodiment, the distribution unit 58 includes a two distribution circuit 64 as shown in FIG. For this reason, the broadcast reception signal output from the mixer 52 is distributed approximately evenly by the distribution unit 58, and the broadcast reception signal is input to each power supply separation circuit 59 at substantially the same level.

  Further, as shown in FIG. 5B, the power source separation circuit 59 passes the broadcast reception signal transmitted from the distribution unit 58 to the output terminals 17 and 57 side, and inputs from the terminal side to the output terminals 17 and 57. The direct current voltage input from the terminal side to the output terminals 17 and 57 is passed to the diode 60 side and transmitted to the output terminals 17 and 57 via the capacitor 62. The coil 63 is configured to prevent the broadcast reception signal from passing to the diode 60 side.

  As described above, in the shield case 12 of the booster 9 according to the present embodiment, the VHF (L) signal, the VHF (H) signal, the UHF reception signal, and the BS / CS-IF signal are amplified (details). Are provided with amplifiers 33, 37, 41, 42, 48, 49), and the shield case 12 has two output terminals as output terminals for outputting all broadcast reception signals amplified by the amplifier circuit. 17 and 57 are provided.

  Each of these output terminals 17 and 57, together with a VHF input terminal 13, a first UHF input terminal 14, a second UHF input terminal 15 and a BS / CS input terminal 16 separately provided on the shield case 12, It protrudes from the case 10 of the booster 9 that houses the shield case 12.

  For this reason, according to the booster 9 of the present embodiment, even if there are a plurality of locations (rooms) where the received signals are to be transmitted on the terminal side, the two output terminals 17 and 57 are used to The received signal can be transmitted to the tuner 68 and the television receivers 69 and 70 installed in the TV.

  Therefore, if the booster 9 of this embodiment is used, the number of devices (distributors and branching devices) used to construct a receiving system that transmits received signals to a plurality of locations is reduced, and the installation work is simplified. Can be performed in a short time. In addition, the wiring from the booster 9 to the terminal side is clear, and wiring mistakes can be prevented.

  Further, the booster 9 of this embodiment is provided with a power supply separation circuit 59 as a power supply separation means and a diode 60 as a direct current voltage synthesis means, and a direct current voltage taken out via the diode 60 is used. The power supply can be supplied to the amplifier circuit in the shield case 12 and other electric loads (converter 8 of the BS / CS antenna 7. For this reason, according to the booster 9 of this embodiment, for example, two output terminals Even if a trouble occurs in the power supply system that supplies a DC voltage to one of 17 and 57, power can be supplied from the other output terminals, and the booster 9 and the converter 8 of the BS / CS antenna 7 are normally operated. Thus, the transmission of the received signal can be continued.

  Next, the booster 9 of the present embodiment is provided with two UHF input terminals 14 and 15. If UHF reception signals having different frequencies are input to the UHF input terminals 14 and 15, these UHF input terminals 14 and 15 are provided. The received signal is mixed and amplified.

  For this reason, according to the booster 9 of the present embodiment, when constructing a receiving system for receiving UHF band television broadcast waves transmitted from a plurality of broadcasting stations located in different directions when viewed from the reception point, The reception signals from the two UHF antennas 5 and 6 that receive the broadcast radio waves from the broadcast station may be input to the UHF input terminals 14 and 15, respectively, and it is not necessary to separately provide a mixer or a filter as in the prior art.

  Therefore, according to the booster 9 of the present embodiment, in constructing a receiving system for receiving UHF band television broadcast waves transmitted from a plurality of broadcasting stations located in different directions when viewed from the receiving point, The number of devices used can be reduced, and installation work can be performed easily in a short time. Further, the wiring from the UHF antennas 5 and 6 to the booster 9 is clear, and wiring mistakes can be prevented.

  Furthermore, the booster 9 of the present embodiment receives the VHF (L) signal, VHF (H) signal, UHF analog signal, UHF digital signal, and BS / CS-IF signal input from each receiving antenna. Input level adjustment switches 20, 22, 24, 26, and 27 and gain adjustment volumes 21, 23, 25, and 28 are provided for adjusting the levels and gains when amplifying these signals, respectively. Therefore, the signal output level when these received signals are output from the output terminals 17 and 57 can be set, and the signal level when these received signals are transmitted to the terminal side can be set relatively easily. Can be.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various aspect can be taken in the range which does not deviate from the summary of this invention.
For example, in the above-described embodiment, the distribution unit 58 serving as the distribution / branching means has been described as being configured by the two distribution circuits 64. However, as illustrated in FIG. The circuit 66 may be used.

  Further, when the distribution unit 58 is configured by the branch circuit 66 as described above, as shown in FIG. 6B, on the transmission path of the received signal from the branch terminal to the output terminal 17, An attenuator 80 for attenuating the received signal so that the output level of the received signal is lower by a preset level (for example, 20 dB) than the received signal output from the output terminal 57; You may make it provide the path | route switch 82 which switches whether 80 is passed.

  In this way, the path changeover switch 82 is switched to the side where the received signal is attenuated by the attenuator 80, and the received signal that has passed through the attenuator 80 is output from the output terminal 17, whereby the output terminal 17 can be used as a monitor terminal for monitoring the signal output from the output terminal 57 and its signal level.

  In this case, the output terminal 17 can be used as a normal output terminal by switching the path selector switch 82 to a side where the received signal bypasses the attenuator 80. The same effect can be obtained even if the attenuator 80 and the path switch 82 are provided when the distribution unit 58 is configured by the distribution circuit 64 (see FIG. 5A).

  On the other hand, as shown in FIG. 6C, on the transmission path of the reception signal from the distribution unit 58 to the power supply separation circuit 59 on the output terminals 17 and 57 side, the signal level of each reception signal (each output terminal) A variable attenuator 65 for adjusting the signal output levels from 17, 57 may be provided. The variable attenuator 65 corresponds to the signal level adjusting means of the present invention.

  In this way, the signal output level from each of the output terminals 17 and 57 can be set according to the signal loss due to the length of the feeder 4 connected to the output terminals 17 and 57, and the receiving system Level adjustment work when constructing can be performed more easily.

  Moreover, although the said embodiment demonstrated as the number of the output terminals provided in the booster 9 being two, you may increase the number of output terminals further. Moreover, although the said embodiment demonstrated the frequency band of BS / CS-IF signal as 1032 MHz-2655 MHz, the upper limit of the frequency band may be 2602 MHz or 2610 MHz. That is, the number of output terminals, the pass frequency band of various filters described above, the stop frequency band, and the like may be appropriately set according to the reception system using the booster 9.

  When the number of output terminals is further increased, the distribution unit 58 may be configured by a distribution circuit 64 that distributes received signals according to the number of output terminals, or may be configured by a plurality of branch circuits 66. Alternatively, the distribution circuit 64 and the branch circuit 66 may be combined as appropriate.

  Next, the booster 9 of the above embodiment can be used to construct a system for receiving analog broadcast radio waves of VHF or UHF and transmitting the received signal to the terminal side. In the future, wave broadcasting will be only digital broadcasting. In this case, since the VHF amplifiers 33 and 37 are unnecessary, a power cutoff switch for stopping the supply of DC power from the power supply circuit 61 to the amplifiers 33 and 37 may be provided.

  In this way, when the analog broadcast is finished, the power supply to the amplifiers 33 and 37 can be cut off via the power cut-off switch, so that unnecessary power consumption in the booster 9 is prevented. It becomes possible.

  On the other hand, when the booster as a television receiving amplifying device is used in an area where it is not necessary to receive the analog broadcast radio wave of VHF, as shown in FIG. , The switch 19 for “on” / “off” of the FM trap circuit 32, the input level adjustment switches 20 and 22 for the VHF reception signal, the gain adjustment volumes 21 and 23 for adjusting the amplification gain of the VHF reception signal, and the VHF reception. What is necessary is just to use the booster 90 which removed the circuit for signal amplification. The booster 90 shown in FIG. 7 is provided with a variable attenuator 65 for adjusting the output levels of the received signals from the two output terminals 17 and 57, respectively.

  The booster 90 can be used as it is even when the terrestrial broadcast of the television is completely transferred to the UHF digital broadcast.

It is a schematic structure figure showing the composition of the whole receiving system of an embodiment. It is explanatory drawing showing the input / output terminal and switch / volume for operation which were provided in the booster. It is a block diagram showing the structure of the amplifier circuit accommodated in the booster. It is explanatory drawing showing the frequency characteristic of the filter provided in the input system of the UHF reception signal. It is explanatory drawing showing the structure of a power supply separation circuit and a distribution part. It is explanatory drawing showing the other example of a structure of the received signal transmission system from a distribution part and a distribution part to a power supply separation circuit. It is explanatory drawing showing the other structural example of a booster. It is a schematic block diagram showing the structural example of the conventional receiving system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,101 ... Reception system, 2 ... Support | pillar, 3 ... VHF antenna, 4 ... Feed line, 5 ... 1st UHF antenna, 6 ... 2nd UHF antenna, 7 ... BS / CS antenna, 8 ... Converter, 9, 90, 104 ... Booster, 9 ... Direct booster, 10 ... Case, 11 ... Cover, 12 ... Shield case, 13 ... VHF input terminal, 14 ... First UHF input terminal, 15 ... Second UHF input terminal, 16 ... BS / CS input terminal, 17, 57 ... output terminal, 19 ... switch, 20, 22, 24, 26, 27 ... first to fifth input level adjustment switches, 21, 23, 25, 28 ... first to first 4, gain adjustment volume, 29 ... ramp, 31, 34, 44, 46, 50 ... LPF, 35, 38, 45, 47, 51 ... HPF, 39, 43 ... BPF, 40 ... BEF, 32 ... FM trap circuit, 3 , 37, 41, 42, 48, 49 ... amplifier, 52, 54, 56 ... mixer, 53 ... splitter, 58 ... distributor, 59 ... power supply separation circuit, 60 ... diode, 61 ... power supply circuit, 62 ... Capacitor, 63 ... Coil, 64 ... Distribution circuit, 65 ... Variable attenuator, 66 ... Branch circuit, 67 ... Divider, 68 ... Tuner, 69, 70 ... Television receiver, 80 ... Attenuator, 82 ... Path switch, 102 ... filter, 103 ... mixer.

Claims (6)

A UHF input terminal for inputting a reception signal of a UHF band television broadcast;
A BS / CS input terminal for inputting a reception signal of at least one of BS broadcast and CS broadcast;
An amplifier circuit for amplifying the received signal input to each of the input terminals;
Distributing / branching means for distributing or branching the received signal amplified by the amplifier circuit to a plurality of signal paths;
A plurality of output terminals that respectively output received signals distributed or branched to the signal paths from the distributing / branching means;
Power supply separating means for separating the DC voltage superimposed on the plurality of output terminals from the received signal;
DC voltage synthesis means for synthesizing the DC voltage separated by the power source separation means and supplying the synthesized voltage to the amplifier circuit or other electrical load;
A television receiving amplifying device comprising: A VHF input terminal for inputting a reception signal of a VHF television broadcast,
The amplifying circuit amplifies a VHF reception signal input to the VHF input terminal in addition to a UHF reception signal and a BS / CS reception signal input to the UHF input terminal and the BS / CS input terminal. The television receiving amplifying device according to claim 1.   The television reception amplifying device according to claim 1 or 2, wherein a plurality of the UHF input terminals are provided, and each UHF input terminal is configured to be able to input a UHF reception signal having a different frequency band. .   2. A signal level adjusting means for adjusting a signal level of a received signal flowing through the signal path is provided in at least one of signal paths from the distributing / branching means to the output terminals. The television receiving amplifying device according to claim 3.   5. The television receiving amplifying apparatus according to claim 1, wherein one of the output terminals is a monitor terminal for monitoring a signal output from another output terminal. 6.   6. The television receiving amplifying device according to claim 1, wherein two output terminals are provided as the plurality of output terminals.

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