JPS61127213A - Distributor - Google Patents

Abstract

PURPOSE:To obtain a distributor for home bus system through which a base band signal passes by providing individually a high frequency ferrite core for high frequency between an input terminal and an output terminal so as to make the loss between the input and output equal to that of the output and other output. CONSTITUTION:One terminal of a wiring 2 of a ferrite core 1 having a winding 2 is connected individually to the input terminal (a) and the output terminal (b) and the other terminal of the winding 2 is connected at one point of the other terminal of the primary winding 2 of the other ferrite core 1. Since the core 1 acts like a minute resistance to a low frequency signal, the circuit offers a low loss and since the core 1 acts like a resistor having a prescribed resistance by the internal loss R proportional to the number of turns of the winding 2 to a high frequency signal, the circuit functions as a two-way distributor.

Description

[Detailed Description of the Invention] (Technical Field) A home bus system K that bidirectionally exchanges video signals, audio signals, and data signals from direct current to high-frequency signals using a single frequency division multiplexing method using a single coaxial cable. In this regard, the present invention relates to a special distributor that powers this 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 has been developed in consideration of the above-mentioned issues.

(Background Art) As shown in Figure IK, conventional distributors basically have a loss value between input and output (comparative Therefore, the loss value between the output car and other outputs is designed to be extremely large, and the low frequency signal is only considered to be used to supply power for the booster.

Additionally, when attempting to transmit high-frequency signals in both directions using a conventional splitter, it is necessary to convert the signal to a different frequency using a head-end converter before transmitting it, as shown in Figure 2. .

(Objective of the invention) To provide a divider for a home path system 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. The purpose is to provide.

(Disclosure of the Invention) An embodiment of the present invention will be described below with reference to FIG.
One end of the winding 2 of each ferrite core l having a winding 2 is connected, and the other end of the winding ts2 of the ferrite core l for nuclear high frequency is connected to one large winding @2 of the other ferrite core l for high frequency.
It is connected to the other end at one point.

Also, Figure 4 shows other 5J! This figure shows an example and is an isometric transformation of FIG. 3 by star-delta transformation.

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

That is, the ferrite core 11 acts only as a slight resistance for low frequency signals.

Also, for high frequency signals, the ferrite core 1 has a winding #j! as shown in FIG. 3 la. 20 Since it acts as a resistor having a constant resistance value due to the internal loss R proportional to the number of turns, it functions as a bidirectional distributor for the first time.

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 from each other.

(Effects of the Invention) The distributor of the present invention can independently, from a baseband signal to a single frequency signal, without going through a de-end.
In addition to making it possible to transmit signals bidirectionally, the ferrite core 1 has a winding 2 without using a high-frequency transformer.K allows for the secondary winding of a transformer system or an autotransformer system. It is possible to obtain an inexpensive bidirectional distributor that is easy to assemble and does not require a tap output or a load resistance on the secondary side.

[Brief explanation of drawings]

Figure 1 is a conventional distribution circuit, Figure 2 is a diagram of a bidirectional transmission system using a conventional distribution circuit, Figure 3 is a distribution circuit diagram of the present invention, and Figure 3 1aJ is a perspective view of a ferrite core. FIG. 4 is a distribution circuit diagram showing another embodiment of the present 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 end of the winding of the high frequency ferrite core is connected to each input terminal and output terminal individually, and the winding of the high frequency ferrite core is A distributor characterized in that the other end is connected at one point to the other end of a winding of another high-frequency ferrite core. (2) The distributor according to claim 1, in which the windings are star-connected. (3) The distributor according to claim 1, in which the windings are connected in delta.