JPS62128687A - information outlet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides information that can branch and bidirectionally transmit signals in a wide range of bands, from DC signals to satellite broadcasting (BS) bands, used in public listening equipment such as ATVs. It's about electrical outlets.

Conventional technology In recent years, as home automation (HA) has progressed, common listening devices such as 2-page CAT"/, which bidirectionally transmit video signals, have become popular and are gaining importance. Conventional branching and distribution The bands used for information signals of transmission equipment using serial units, etc. are from the 7M band to the UHF band, from the VHF band to the BS band, and the 0 and 5M band called the so-called super home bus. The transmission line makes it possible to transmit from near the radio band to the BS band, resulting in a wide band.

The conventional series unit mentioned above will be explained below with reference to FIG. FIG. 3 shows a circuit diagram of a conventional series unit.

In Figure 3, 11 is an input terminal for inputting signals from the transmission line, 12 is an output terminal for outputting signals to the transmission line, and 13 is a branch terminal for supplying branched signals to information equipment. A terminal 14 is a transformer 16 connected between the input terminal 11 and the output terminal 12 and passing a DC component.
A capacitor 17 has one end connected to the input terminal 11 and forms a band filter 16 with the transformer 14, and a capacitor 17 has one end connected to the output terminal 12 and connects with the transformer 14 to band 3.
The capacitor forming the filter 18 blocks the direct current component. 19 is a branching transformer for branching the input signal from the transmission line to the branching terminal 13;

20 is a capacitor for cutting the DC component of the signal branched by the branch transformer 19; 21 is a capacitor for impedance adjustment; and 22 is a dummy resistor for the branch transformer 19.

First, the series unit configured as described above.

A signal is passed from the input terminal 11 to the output terminal 12, and the signal is branched from the input terminal 11 to the branching terminal 13 by a branching transformer 19 to output the signal.

Problems to be Solved by the Invention However, with the above configuration, the deterioration of characteristics due to the choke coil appears particularly in the SHF band, and a signal cannot be output from the branching terminal 13 to the input terminal 11. A signal cannot be outputted from the output terminal 12 to the input terminal 11 either, and this has the problem that it can only be used as a branch for a home bus system using CATV or the like that requires a bidirectional transmission function. .

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an information outlet that has a bidirectional transmission function such as I(A) and enables mutual transmission between information devices in a home bus system.

Means for Solving the Problems In order to achieve the above object, the present invention provides a first and second coaxial cable connected in series to a coaxial cable for transmitting information signals of each information device.
an input/output terminal, a resistor having one end connected to the second input/output terminal, and a transformer connected to the other end of the resistor;
The configuration includes a capacitor connected between the transformer and ground, a branch terminal connected to the neutral point of the transformer, and a choke coil connected between the second input/output terminal and the branch terminal. It has become.

Effect of the present invention With the above-described configuration, a signal inputted from one of the second and second input/output terminals is outputted to the other input/output terminal, and the branched input signal is supplied to the branching terminal. The output 6 basso force signal from the terminal is also output to the 1st and 2nd input/output terminals.
Bidirectional transmission is possible with each information device via a transmission line at the input/output terminal of the device, and the transmission band is wide, allowing use of signals ranging from the DC component band to the satellite broadcast band.

EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 1 shows the circuit configuration of an information outlet in an embodiment of the present invention.

FIG. 2 is a system block diagram of an information system for a home bus system, an apartment building, etc., which is capable of bidirectional transmission and uses the information outlet of this embodiment.

In FIG. 2, 8 is a center that supplies satellite broadcasting signals and video signals to each block, 9 is a CATV connection section, 94 to 9d are various information devices, and IQa to 10d are information signals to various information devices 9a to 9d. This is an information outlet according to this embodiment that inputs and outputs information and enables bidirectional transmission.

This information outlet will be explained in more detail below with reference to the 6 vanes in FIG.

In Fig. 1, 2 is a first input/output terminal (INloUT) which is connected to a coaxial cable line provided to enable bidirectional transmission of information devices, etc.; 3 is a second input/output terminal (INloUT); 2
The input/output terminal of , 2 is the resistor whose one end is connected, 4 is the resistor 3
A transformer has one end connected to the other end of the transformer, 5 has one end connected to the other end of the transformer 4, and the other end is a grounded DC cutting and matching capacitor, 6 has one end connected to the second input/output terminal. , a choke coil whose other end is connected to the branching terminal 7 linearly connects the input/output terminal and the branching terminal. Further, various information devices are connected to the branching terminal 7, and signals are transmitted and received via this branching terminal 7.

The operation of this embodiment configured as above will be described below.

First, the signal input to the first input/output terminal 1 is branched into two, and the output level is adjusted to the resistor 3 and the second input/output terminal 2.

By configuring as above 2, most of the signals input from one input/output terminal are sent to other information equipment from the other input/output terminal, and the signal input to the transformer 4 is branched. A signal can be supplied from the branch terminal 7 to the information equipment connected to the branch terminal 7. (For example, 10 dB is input, 9 dB is output, and 4 dB is supplied to the branch terminal 7.) In this case, the frequency band used by the transmission line is a wide range from DC component signals to the satellite broadcasting band. signals can be used, and there is no deterioration 5, for example, deterioration in the SHF band, unlike in conventional series units.

In addition, both input/output terminals 1 and 2 can have the same properties, and the signal input from input/output terminal 2 is exactly the same as the signal input from input/output terminal 1. At the same time, the branch terminal 7 is passed through the input/output terminal 1.
is supplied to Further, the output signals from the information devices connected to the 5-branch terminal 7 are outputted from the branch terminal 7 to both output terminals 1 and 2, and can be connected between each information device by using the 5-information outlet of this embodiment. This enables two-way information transmission.

According to the present invention, one end of the resistor is connected to the conductor between input and output terminals, a transformer and a capacitor are cascade-connected to the other end, one end of the capacitor is grounded, and the transformer is connected to the conductor between the input and output terminals. By connecting a branching terminal to the neutral point and connecting a choke coil between one of the input/output terminals and the branching terminal, a wide range of frequencies from DC component signal bands to satellite broadcasting bands can be achieved. This allows signals to be branched across all bands without deterioration and allows for bidirectional transmission.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an information outlet according to an embodiment of the present invention, FIG. 2 is a schematic block diagram of a home bus system using the same information outlet, and FIG. 3 is a circuit diagram of a conventional series unit. , 2... Input/output terminal, 3... Resistor, 4
9 Page lance, 5... Capacitor, 6... Chirok coil, 7... Branch terminal. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure (,Q-Each one out fJ end 3-Lance 4--Lance 5--] Soden length G--Nayork] Ile 7--Kemsu wound 1 and

Claims (1)

[Claims] first and second input/output terminals, a resistor with one end connected to the first and second input/output terminals, a transformer connected to the other end of the resistor, and a transformer connected between the transformer and ground. An information outlet comprising a capacitor, a branch terminal connected to a neutral point of the transformer, and a choke coil connected between a second input/output terminal and the branch terminal.