JPH04312025A - Satellite broadcast receiver tuner - Google Patents

Abstract

PURPOSE:To simplify cable wiring by making the setting work of a distributor unnecessary. CONSTITUTION:A BS tuner mounted in a video tape recorder 4 is provided with an input terminal TNIN and an output terminal TNOUT', and simultaneously, the distributor 17 and an amplifier 18 are installed between both terminals TNIN and TNOUT'. This amplifier 18 is driven by power supply +B' other than the power supply +B for a tuner circuit. After a satellite broadcast signal given to the input terminal TNIN is amplified by the amplifier 18, it is fetched to the distributing input terminal IN of the distributor 17. The distributor 17 outputs the fetched satellite broadcast signal to the tuner circuit 6 through each distributing output terminal OUT1, OUT2, and on the other hand, it outputs it to a television receiver 5 through the output terminal TNOUT'.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tuner for receiving satellite broadcasting (hereinafter referred to as a BS tuner).

0002

2. Description of the Related Art FIG. 3 shows a block diagram for distributing satellite broadcasting signals to a video tape recorder with a built-in BS tuner and a television receiver using a two-way splitter.

In the figure, 1 is a satellite broadcast receiving antenna, 2 is a terrestrial broadcast receiving antenna, 3 is a distributor, and 4 is a B
A video tape recorder has a built-in S tuner, and 5 is a television receiver.

A satellite broadcast receiving antenna 1 is connected to a distribution input terminal IN of a distributor 3, and distribution output terminals OUT1 and OUT2 of the distributor 3 are connected to a video tape recorder 4 and a television receiver 5, respectively. It is connected to the satellite broadcasting signal input terminal BSIN.

[0005]The satellite broadcasting signal received by the satellite broadcasting receiving antenna 1 is given to the distribution input terminal IN of the distributor 3, and is also applied to the distribution output terminals OUT1, OUT2.
are distributed from each to the satellite broadcast signal input terminal BSIN of the video tape recorder 4 and the satellite broadcast signal input terminal BSIN of the television receiver 5, whereby the video tape recorder 4 and the television receiver 5
and receive satellite broadcast signals respectively.

The terrestrial broadcast receiving antenna 2 is connected to the terrestrial broadcast signal input terminal U/VIN for UHF broadcast/VHF broadcast of the video tape recorder 4, and is connected to both the terrestrial broadcast signal output terminals U of the video tape recorder 4. /VOU
T is connected to both terrestrial broadcast signal input terminals U/VIN of the television receiver 5.

The terrestrial broadcast signal received by the terrestrial broadcast receiving antenna 2 is input to the terrestrial broadcast signal input terminal U/VIN of the video tape recorder 4, and then is input to the terrestrial broadcast signal output terminal of the video tape recorder 4. U/VOU
The signal is output from T and input to the terrestrial broadcast signal input terminal U/VIN of the television receiver 5.

[0008] Here, each of the above input/output terminals is F.
It consists of a type connector.

FIG. 4 is a detailed circuit diagram of a BS tuner built into a video tape recorder 4, which is partially shown by broken lines, and 6 is a band-pass filter, and 7 is a built-in BS tuner. High frequency amplifier, 8 is a frequency mixing circuit,
9 is a local oscillation circuit, 10 is a PLL selection section, 11 is a first stage IF amplifier, 12 is a band pass filter, and 13 is a second stage I
F amplifier 14 is an FM demodulator.

[0010] This BS tuner has a tuner input terminal T.
NIN, and the tuner input terminal TNIN is
Satellite broadcast signal input terminal BSI of video tape recorder 4
Connected to N.

[0011] Since the circuit configuration and operation of the above-mentioned BS tuner are well known, a detailed explanation thereof will be omitted.
In short, the satellite broadcast signal distributed by the distributor 3 and output from the distribution output terminal OUT1 is inputted to the tuner input terminal TNIN of the BS tuner via the satellite broadcast signal input terminal BSIN of the video tape recorder 4. The satellite broadcasting signal input to this input terminal TNIN is as shown in FIG.
The signal is supplied from the tuner output terminal TNOUT to a video and audio signal processing circuit inside the video tape recorder 4 (not shown) through each circuit 6, and undergoes necessary processing.

0012

[Problem to be Solved by the Invention] [2] Regarding video equipment such as a video tape recorder 4 and a television receiver 5,
It is necessary to externally wire the distributor 3 using the actual cables 15 and 16, but with the external distributor 3,
Not only is the installation difficult, but the cable wiring becomes complicated.

Therefore, in the present invention, the distributor is built into the BS tuner, eliminating the need to install the distributor, which would have been required if it were installed externally, and thereby simplifying the cable wiring. It aims to make it possible.

[0014]

[Means for Solving the Problem] In order to achieve such an object, the BS tuner according to claim 1 of the present invention has a tuner input terminal and a tuner output terminal, and a distributor. The distributor has a distribution input terminal and at least two distribution output terminals;
The satellite broadcasting signal from the distribution input terminal is distributed to both distribution output terminals, and the distribution input terminal is connected to the tuner input terminal, one distribution output terminal is connected to the tuner circuit, and the other distribution output terminal is connected to the tuner circuit. It is characterized by being connected to each tuner output terminal.

Further, in the BS tuner according to claim 2 of the present invention, an amplifier is provided between the tuner input terminal and the distribution input terminal of the divider, and the amplifier is configured to provide the input signal from the tuner input terminal to the distribution input terminal. It amplifies satellite broadcasting signals, and is characterized by being driven by a power source separate from the power source for the tuner circuit, so that it can operate with the power source separate from the power source for the tuner circuit even when the power source for the tuner circuit is off. It is said that

[0016]

According to the present invention, the satellite broadcasting signal applied to the tuner input terminal is taken into the distribution input terminal of the distributor. The distributor outputs the acquired satellite broadcasting signal to the tuner circuit and the tuner output terminal via each distribution output terminal.

Therefore, in a video tape recorder as a video device equipped with the BS tuner, the satellite broadcasting signal from one distribution output terminal of the distributor is processed by the tuner circuit to perform the required processing, while the other one is The satellite broadcast signal from the distribution output terminal can be output from the tuner output terminal to the satellite broadcast input terminal of the television receiver, for example, via the satellite broadcast signal output terminal of the video tape recorder.

In claim 2, the amplifier for amplifying the satellite broadcasting signal is driven by a power source separate from the power source for the tuner circuit, so that it can operate with the separate power source even when the power source for the tuner circuit is off. Therefore, when the BS tuner is installed in a video tape recorder, even when the power supply for the tuner circuit of the video tape recorder is off, it is driven by a separate power supply, and as a result, the satellite broadcasting from the tuner input terminal is It is possible to amplify the signal and output the satellite broadcast signal from the tuner output terminal via the satellite broadcast signal output terminal of the video tape recorder to, for example, the satellite broadcast signal input terminal of the television receiver.

[0019]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a block diagram of a video tape recorder equipped with a BS tuner and a television receiver according to an embodiment of the present invention, and FIG. 2 is a detailed circuit diagram of the BS tuner of FIG. Therefore, the same parts as in FIGS. 3 and 4 according to the conventional example are given the same reference numerals, and a detailed explanation of the same parts will be omitted.

In FIG. 1, 1 is a satellite broadcast receiving antenna, 2 is a terrestrial broadcast receiving antenna, 4 is a video tape recorder with a built-in BS tuner, and 5 is a television receiver.

In this embodiment, unlike the conventional example, there is no external distributor, and the distributor is built into the BS tuner of the video tape recorder 4, as shown by reference numeral 17 in FIG. .

The BS tuner of the embodiment shown in FIG.
Tuner input terminal TNI for inputting satellite broadcast signals
In addition to having a tuner output terminal TNOUT for outputting the circuit-processed satellite broadcasting signal, it also has another tuner output terminal TNOUT' for outputting the satellite broadcasting signal. , between the tuner input terminal TNIN and the tuner output terminal TNOUT',
It is characterized by the provision of a distributor 17 and an amplifier 18.

This tuner input terminal TNIN is connected to the satellite broadcasting signal input terminal BS of the video tape recorder 4.
IN and tuner output terminal TNOUT'
is also connected to the satellite broadcast signal output terminal BSOUT of the video tape recorder 4.

In this case, in FIG. 2, the tuner input terminal TNIN, the satellite broadcasting signal input terminal BSIN, the tuner output terminal TNOUT' and the satellite broadcasting signal output terminal BSO are connected to each other.
The tuner input terminal TNIN and output terminal TNOUT' of the BS tuner are connected to the satellite broadcasting signal input terminal of the video tape recorder 4, respectively, although they are shown as being connected to the UT by wiring. BSIN
The tuner input terminal TNIN and the output terminal TNOUT may be connected directly to the output terminal BSOUT to omit the wiring, or they may be shared with each other. It also includes things.

The amplifier 18 also has a tuner input terminal T.
It amplifies the satellite broadcast signal from the NIN, and is separate from the power supply +B for each tuner circuit from the bandpass filter 6 to the FM demodulator 14 (for example, the BS converter of the satellite broadcast receiving antenna 1). By being driven by the power source supplied to the tuner circuit, it is possible to operate with the separate power source +B' even when the tuner circuit power source +B is off. Here, the BS tuner of the embodiment has a structure including the FM demodulator 14, but it goes without saying that the embodiment also includes a BS tuner without the FM demodulator 14.

In operation, the satellite broadcast receiving antenna 1
A satellite broadcast signal from the video tape recorder 4 is applied to a satellite broadcast signal input terminal BSIN of the video tape recorder 4. This terminal BS
Since the tuner input terminal TNIN of the BS tuner built in the video tape recorder 4 is connected to IN, the satellite broadcast signal is transmitted to the tuner input terminal TNIN.
After being amplified by the amplifier 18 of the BS tuner, the signal is taken into the distribution input terminal IN of the distributor 17. The distributor 17 outputs the acquired satellite broadcasting signal to each distribution output terminal O.
The signal is output to the bandpass filter 6 of the tuner circuit and the tuner output terminal TNOUT' via UT1 and OUT2, respectively.

Therefore, in the video tape recorder 4 equipped with the BS tuner, the satellite broadcast signal from one of the distribution output terminals OUT1 of the distributor 17 is processed by the subsequent tuner circuit and output after performing the necessary processing. Terminal TN
While outputting from OUT, the other distribution output terminal OUT
A satellite broadcast signal from 2 can be output to a television receiver 5.

[0029] Also, an amplifier 18 for amplifying the satellite broadcasting signal
is driven by a power supply +B' that is separate from the tuner circuit power supply +B, so that it can operate with the separate power supply +B' even when the tuner circuit power supply +B is off. When installed in a video tape recorder 4, by turning off the power supply of the video tape recorder 4, even if the power supply +B for the tuner circuit is turned off, it is driven by the separate power supply +B', and as a result, the tuner input terminal The satellite broadcast signal from TNIN can be amplified and output from the tuner output terminal TNOUT' to the television receiver 5, for example.

[0030]

[Effect of the invention] As is clear from the above explanation,
According to claim 1 of the present invention, the satellite broadcasting signal applied to the tuner input terminal is taken into the distribution input terminal of the distributor, and the distributor sends the taken-in satellite broadcasting signal through each distribution output terminal. Therefore, if the device equipped with the BS tuner is, for example, a video tape recorder, the satellite broadcasting signal from one distribution output terminal of the distributor is output to the tuner circuit and the tuner output terminal. While processing the satellite broadcast signal from the other distribution output terminal, it is possible to output the satellite broadcast signal from the other distribution output terminal to another device, such as a television receiver, via the video tape recorder. Become. Therefore, in claim 1 of the present invention, the distributor, which was conventionally attached externally, is built into the BS tuner, which eliminates the need for installation work for the distributor and simplifies cable wiring. be converted into

According to claim 2 of the present invention, the amplifier for amplifying the satellite broadcast signal is driven by a power source separate from the power source for the tuner circuit, so that the amplifier for amplifying the satellite broadcasting signal can be used even when the power source for the tuner circuit is off. Since it can be operated with a separate power supply,
For example, when the BS tuner is installed in a video tape recorder, a satellite broadcasting signal can be output from the video tape recorder to a television receiver even when the power supply for the tuner circuit of the video tape recorder is off. This improves usability.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a video tape recorder equipped with a satellite broadcast reception tuner and a television receiver according to an embodiment of the present invention.

FIG. 2 is a detailed circuit diagram of the satellite broadcast reception tuner of FIG. 1;

FIG. 3 is a block diagram of a conventional video tape recorder and television receiver equipped with a satellite broadcast reception tuner.

FIG. 4 is a detailed circuit diagram of the satellite broadcast reception tuner of FIG. 3;

[Explanation of symbols]

1 Satellite broadcast receiving antenna 2 Terrestrial broadcast receiving antenna 4 Video tape recorder 5 Television receiver 17 Distributor 18 Amplifier TNIN tuner input terminal TNOUT' Tuner output terminal +B' Separate power supply

Claims (2)

[Claims] Claim 1: It has a tuner input terminal (TNIN) and a tuner output terminal (TNOUT'), and
A distributor (17) is built-in, and the distributor (17) is
It has a distribution input terminal (IN) and at least two distribution output terminals (OUT1, OUT2).
) from both distribution output terminals (OUT1, O
The distribution input terminal (IN) is distributed to the tuner input terminal (TNIN), one distribution output terminal (OUT1) is distributed to the tuner circuit (6), and the other distribution output terminal (OUT2) is distributed to the tuner circuit (6). ) are respectively connected to the tuner output terminal (TNOUT'). [Claim 2] Tuner input terminal (TNIN) and distributor (
An amplifier (18) is connected between the distribution input terminal (IN) of 17)
The amplifier (18) has a tuner input terminal (TN
It amplifies the satellite broadcasting signal applied from the power supply (+IN) to the distribution input terminal (IN).
By being driven by a separate power supply (+B') from B), even when the tuner circuit power supply (+B) is off, the separate power supply (+B')
The tuner for satellite broadcast reception according to claim 1, characterized in that it is operable in B').