JPH03258145A - Signal cable - Google Patents

Abstract

PURPOSE:To suppress the effect of a spurious radiation wave by incorporating a serial/parallel(S/P) converter to a connector of a sender side, incorporating a P/S converter to a connector of a receiver side and interconnecting both the connectors with plural signal lines. CONSTITUTION:A serial/parallel(S/P) converter CV 11 is incorporated to a connector 5 and a P/S CV 12 is incorporated in a connector 6 and both connectors are interconnected by a signal line 13. A computer main body 11 converts an internal P data into an S data by the P/S CV 12 and sends the converted data into the (S/P) converter CV 11, where the data is again converted into a P data. The data is sent as it is to the signal line 13 and inputted to the P/S CV 12, where the data is converted into the S data again and given to an external input output device 2. Thus, the main body 1 sends/receives the S data with the connector 6 and between the connector 6 and the device 2 but handles the P data on the signal line 13. Thus, when number of the signal lines is (n), the frequency of the P data is 1/n with respect to the frequency of the S data and the effect of spurious radiation is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a signal cable that connects a serial data transmitting side and a receiving side.

[Prior Art] FIG. 2 is a block diagram of a computer system using a conventional signal cable.

In the figure, (1) is the computer main body, (2) is the external input/output device,
(3) is a parallel/serial (hereinafter referred to as P/
(4) is a serial cable, one end of which is connected to the connector (5) that is connected to the P/S converter (3), and the other end of which is connected to the external input/output device (2). Connector (6) is connected.

The conventional signal cable is configured as described above, and the parallel data in the computer main body (1) is converted to serial data through the P/S converter (3),
) to the external input/output device (2). The external input/output device (2) converts the transmitted serial data into data compatible with that device. When transmitting serial data, high frequencies are used to increase the data transmission speed.

[Problem to be solved by the invention] With the conventional signal cables as described above, since serial data is transmitted, the data must be transmitted at a high frequency to be emitted, resulting in the problem of being affected by unwanted electromagnetic interference (EMI). There is a point.

This invention was made to solve the above problems, and aims to provide a signal cable that eliminates the need to transmit data at high frequencies and that can suppress the influence of unnecessary reflected radio waves. .

[Means for Solving the Problems] The signal cable according to the present invention has a built-in serial/parallel (hereinafter referred to as S/P) converter in the connector on the sending side, and a P/S converter in the connector on the receiving side. It is built-in, and both connectors are connected with multiple signal lines.

[Function] In this invention, an S/P converter is built into one side of the connector, a P/S converter is built into the other side, and a plurality of signal lines are connected between the two connectors, so that a signal line for transmitting parallel data can be used. If there are n pieces, the frequency of parallel data is l/n of that of serial data.

[Embodiment] FIG. 1 is a block diagram of a computer system showing an embodiment of the present invention, and parts similar to those of a conventional device are designated by the same reference numerals.

In the figure, (Ill is an S/P converter built in the connector (5) and connected to the P/S converter (3) to convert serial data to parallel data, and (12) is the S/P converter built in the connector (6). The P/S converter (13) is the S/P converter (11
) and the P/S converter (12).

In the signal cable configured as described above, the computer main body (11) transfers internal parallel data to the P/S converter (11).
3) convert it to serial data and send it to the S/P converter (11).
, where it is again converted to parallel data. The data is transmitted as is through the signal line (13), and P
/S converter (12). Here, it is converted into serial data again and passed to the external input/output device (2). Therefore, although serial data is exchanged between the computer main body (1) and the connector (5) and between the connector (6) and the external input/output device (2), the signal line (13)
The above example deals with parallel data.

In the above embodiment, the interface between the computer main body (1) and the external input/output device (2) is shown, but the present invention is also applicable to the case between computer main bodies or between other devices.

In addition, for serial interfaces (for example, R3232C, etc.) where the hardware interface has been standardized as a public institution or industry standard, it is possible to replace only the signal line without modifying the device circuit. Measures against unnecessary overshadowing radio waves can be easily taken.

[Effects of the Invention] As explained above, in this invention, an S/P converter is built into the transmitting side connector, a P/S converter is built into the receiving side connector, and multiple signal lines are connected between the two connectors. Therefore, if there are n signal lines, the frequency of parallel data is 1. /n, which has the effect of suppressing the influence of unnecessary overshadowing radio waves.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a computer system showing an embodiment of a signal cable according to the present invention, and FIG. 2 is a block diagram of a computer system showing a conventional signal cable. In the figure, (1) is the transmitter ff111 (computer body), (2
1 is the receiving side (external input/output device), (5) (6) is the connector, (11, 1 is the serial/parallel converter, (
12) is a parallel/serial converter, and (13) is a signal line. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] In a cable that has connectors at both ends and connects a serial data transmitter and a receiver via the connectors, the transmitter's connector has a built-in serial/parallel converter, and the receiver's connector has a built-in serial/parallel converter. A signal cable characterized in that the connector has a built-in parallel/serial converter, and the two connectors are connected by a plurality of signal lines.