JPS61127212A - Distributor - Google Patents

Abstract

PURPOSE:To obtain a distributor for home bus system through which even a base band signal passes by connecting a high frequency transformer individually between an input and an output terminal so as to make the loss between the input and output equal to the loss between the output and other output. CONSTITUTION:One end of a primary winding 2 of a high frequency transformer 1 is connected individually to an input terminal (a) and an output terminal (b), the other terminal of the primary winding 2 is connected at one point of the other end of the primary winding 2 of the other high frequency transformer 1 and a proper resistor 4 is connected to the secondary winding 3 of the high frequency transformer 1. Thus, since the high frequency transformer 1 acts like a minute resistance to a low frequency signal, a low loss is attained. Further, since the high frequency transformer 1 acts like a resistor having a prescribed resistance to a high frequency signal, the transformer functions as a multi-direction distributor.

Description

[Detailed Description of the Invention] [Technical Field] A home hash system that uses a single coaxial cable to exchange video signals, audio signals, and data signals in multiple directions using frequency division multiplexing, from direct current to high-frequency signals. In this regard, the present invention relates to a special distributor that constitutes a system.

In other words, data signals and control signals are transmitted using baseband signals (DC to low frequency signals), and video (TV broadcasting, etc.) and audio (FM broadcasting, etc.) are transmitted using high frequency signals.
The present invention is intended to transmit intercom, BGM), and the present invention takes the above matters into consideration.

[Background technology]

As shown in Figure 1, conventional distributors basically have a loss between input and output in order to properly transmit television broadcasts and prevent interference between television receivers. The loss value between other outputs is designed to be extremely large, and the low frequency signal is only considered for supplying power for a booster.

In addition, when trying to transmit high-frequency signals in multiple directions using a conventional distributor, it is necessary to convert the signal to a different frequency using a head-end converter before transmitting it, as shown in Figure 2. .

[Purpose of the invention]

The purpose of this invention is to provide a home path system divider that equalizes the loss value between input and output and the loss value between output and other outputs, and also allows baseband signals (DC to low frequency) to pass through. do.

[Disclosure of the invention]

An embodiment of the present invention will be described below with reference to FIG.

This distribution circuit has input terminal 2 and output terminal separately.
One end of the primary winding 2 of each high frequency transformer 1 is connected, and the other end of the primary winding #12 of the high frequency transformer 1 is connected at one point to the other end of the primary winding 2 of another high frequency transformer l. The secondary winding 41!3 of the high frequency transformer 1 is formed by connecting an appropriate resistor 4 to W! tFt.

In addition, the secondary winding of high frequency transformer 1! s3 may not be independent from the primary winding @2, but may be drawn out as a tap and configured like an autotransformer.

Moreover, FIG. 4 shows another embodiment, and FIG.
This is a model that has been transformed isometrically using the following transformation.

With the above configuration, low frequency signals including direct current can be transmitted with extremely low loss.

That is, for low frequency signals, the high frequency transformer 1 does not function as a transformer, but only as a slight resistance.

Also, for high frequency signals, the high frequency transformer 1 acts as a resistor with a constant resistance value, so at this time,
For the first time, it functions as a multidirectional distributor.

As described above, by using the distributor of the present invention, it becomes possible to transmit baseband signals and high frequency signals independently without interference.

Incidentally, for the sake of explanation, the transformer 1 of the above distribution circuit has a primary winding, a 2
Although the next winding is separated, the O)) Hounsu method may also be used.

〔Effect of the invention〕

The distributor of the present invention makes it possible to independently transmit signals in multiple directions, from baseband signals to high-frequency signals, without going through a headman.

[Brief explanation of the drawing]

Figure 1 shows a conventional distribution circuit. FIG. 2 is a diagram of a multidirectional transmission system using a conventional distribution circuit. FIG. 3 is a distribution circuit diagram of the present invention, and FIG. 4 is a distribution circuit diagram showing another embodiment of the invention. l: High frequency transformer, 2: Primary winding, 3: Secondary winding, 4
:resistance.

Claims (3)

[Claims] (1) In a distributor consisting of input terminals and output terminals, one high-frequency transformer is connected to each input terminal and output terminal individually.
One end of the secondary winding is connected, the other end of the primary winding of this high frequency transformer is connected at one point to the other end of the primary winding of another high frequency transformer, and the secondary winding of each high frequency transformer is for,
A distributor, connected with a suitable resistor, in which the secondary winding of the high-frequency transformer may be provided independently of the primary winding or may be drawn out as a tap. (2) The distributor according to claim 1, in which the high frequency transformer is star-connected. (3) The distributor according to claim 2, in which a high frequency transformer is connected in delta.