JPH05114439A - Connector - Google Patents

Abstract

PURPOSE:To suppress electromagnetic wave radiating noise by transmitting signals by magnetic joining between coils corresponding to the sending and receiving at the interface set in a connector main body for connection with an external appliance and installing a noise component shutting means. CONSTITUTION:A signal of a communication line 9 in the receiving side of a cable CA is supplied to a pulse transformer 11b and converted into a not equilibrium signal and further it is supplied to a CMI coding part 2 through an equilibrium pattern 10b on a printed substrate 1 and compounded. At that time, the high frequency wave noise due to the interface circuit on the printed substrate 1 is induced in equilibrium patterns 10a, 10b. But the high frequency wave noise induced in the equilibrium patterns 10a, 10b is shut by a pulse transformer 11a and is not transmitted to the cable CA side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector, and more particularly to a connector having noise component blocking means for blocking a noise component while transmitting a signal based on magnetic coupling.

[0002]

2. Description of the Related Art FIG. 2 is an electric circuit diagram showing a configuration of an input / output interface section of a communication apparatus having a conventional subscriber line terminating device interface. In the figure, 1 is a printed circuit board, 2 is a CMI codec section, 3a is a pulse transformer on the transmitting side mounted on the printed circuit board 1, 3b.
Is a pulse transformer on the receiving side mounted on the printed circuit board 1, 4a is a balanced pattern of the signal lines on the transmitting side printed on the printed circuit board, and 4b is a balanced pattern of the signal line on the receiving side printed on the printed circuit board 1. 5 is an interface connector, 6a is a transmission-side signal line in the interface connector 5, 6b is a reception-side signal line in the interface connector 5, 7 is a cable-side connector,
Reference numeral 8 is a transmission side communication path of the cable CA, and 9 is a reception side communication path of the cable CA.

In this example, the CMI coded portion 2 converts the CMI-coded signal into a balanced signal by the pulse transformer 3a and sends it to the transmission side communication path 8 of the cable CA via the balanced pattern 4a and the signal line 6a. It on the other hand,
The signal sent through the reception side communication path 9 of the cable CA is supplied to the pulse transformer 3b through the signal line 6b in the interface connector 5 and the balanced pattern 4b, converted into an unbalanced signal, and further, the CMI codec section. It is restored in 2.

[0004]

Since the conventional connector is constructed as described above, the printed circuit board 1 needs a space for mounting the pulse transformers 3a and 3b. Therefore, the connector is mounted on the printed circuit board 1. However, there is a problem that the mounting area of the interface circuit becomes large. Furthermore, the balance pattern 4a and the balance pattern 4b are the printed circuit board 1
Since it is formed on the printed circuit board 1, high-frequency noise due to the interface circuit mounted on the printed circuit board 1 is induced in the balanced patterns 4a and 4b, which is the cable CA.
There is a problem that causes the generation of EMI (electromagnetic radiation) noise.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to increase the mounting density on the printed circuit board 1 and to suppress the generation of electromagnetic radiation noise from the cable. The purpose is to provide a connector.

[0006]

According to a first aspect of the present invention, there is provided a connector main body for connection with an external device, wherein a coil body fixed to each other is provided in a connector body for connection with an interface for data transmission or data reception. A noise component blocking means for transmitting a signal by magnetic coupling and blocking a noise component is provided.

According to a second aspect of the present invention, in the connector according to the first aspect, the noise component blocking means is a pulse transformer.

[0008]

The connector according to the invention of claim 1 provides a signal by magnetically coupling between mutually fixed coils corresponding to an interface at the time of data transmission or data reception in the connector main body for connection with an external device. Since the noise component blocking means for transmitting the noise and blocking the noise component is provided, it is possible to increase the mounting density on the printed circuit board and suppress the generation of electromagnetic radiation noise.

The connector according to the invention of claim 2 is
In the connector according to the first aspect, by using the pulse transformer as the noise component blocking means, the mounting density on the printed circuit board can be increased and the generation of electromagnetic radiation noise can be suppressed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an electric circuit diagram showing a connector according to an embodiment of the present invention. In this figure, parts that are the same as or correspond to those in FIG.

10a is a balanced pattern printed on the printed circuit board 1, 10b is a balanced pattern printed on the printed circuit board 1, 11a is a pulse transformer on the transmission side provided inside the interface connector 5,
1b is a pulse transformer on the transmission side provided inside the interface connector 5.

In this embodiment, the CMI coded signal in the CMI codec unit 2 is supplied to a pulse transformer 11a via a balanced pattern 10a printed on the printed circuit board 1 and converted into a balanced signal by the pulse transformer 3a. And transmitted to the transmission side communication path 8 of the cable CA. On the other hand, the signal sent through the reception side communication path 9 of the cable CA is supplied to the pulse transformer 11b, converted into an unbalanced signal, and further, through the balanced pattern 10b printed on the printed circuit board 1, the CMI codec section. It is supplied to No. 2 and is restored. At this time, high frequency noise due to the interface circuit mounted on the printed circuit board 1 is induced in the balanced patterns 10a and 10b. However, since the high frequency noise induced in the balanced patterns 10a and 10b is blocked by the pulse transformer 11a, this high frequency noise is not transmitted to the cable CA side and may cause generation of EMI (electromagnetic radiation) noise in the cable CA. Disappear.

[0013]

As described above, according to the invention of claim 1, between the coils fixed to each other corresponding to the interface at the time of data transmission or data reception in the connector main body for connection with the external device. Since the noise component blocking means for transmitting the signal by magnetic coupling and blocking the noise component is provided, the mounting density on the printed circuit board can be increased and the generation of electromagnetic radiation noise can be suppressed. effective.

According to the invention of claim 2, in the connector of claim 1, the noise component reducing means is a pulse transformer, so that the mounting density on the printed circuit board can be increased and the electromagnetic radiation noise is generated. There is an effect that can suppress.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing a connector according to an embodiment of the present invention.

FIG. 2 is an electric circuit diagram showing a configuration of an input / output interface section of a communication device having a conventional subscriber line terminating device interface.

[Explanation of symbols]

 5 Interface connector 7 Cable side connector 11a Pulse transformer 11b Pulse transformer

Claims (2)

[Claims] 1. In a connector applied to a communication device having an interface, a magnetic field between coils fixed to each other corresponding to the interface at the time of data transmission or data reception in a connector main body for connection with an external device. A connector provided with a noise component blocking means for transmitting a signal by mechanical coupling and blocking a noise component. 2. The connector according to claim 1, wherein the noise component blocking means is a pulse transformer.