JPH04369923A - signal switching device - 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]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal switching device for outputting a desired signal from a plurality of signals.

0002

2. Description of the Related Art A signal switching device is used to output a desired signal from a plurality of signals to a desired output.

A conventional signal switching device will be explained below. FIG. 2 is a configuration diagram of a conventional m-input n-output signal switching device, in which 1 is an input terminal, 2 is an m-input 1-output signal switching circuit, and 3 is an output terminal. Input terminal 1 is m
An m-input, n-output signal switching device is constituted by n signal switching circuits 2 having m inputs and 1 output, and n output terminals.

[0004] A desired input signal is selected and outputted to each of the n outputs by a switching control signal in a signal switching device 2 having m inputs and 1 output.

[0005]

[Problems to be Solved by the Invention] In such a conventional signal switching device, a plurality of devices each having a built-in signal switching device are used, connected to a signal switching device with a*m inputs and a*n outputs, and a When outputting desired signals from the outputs of a device incorporating two signal switching devices to the outputs of the a*m input and a*n output signal switching devices, there is a situation in which some input signals cannot be output. Therefore, it was necessary to attach or remove a signal switching device for m inputs and n outputs in the device, or to change the wiring specifications, depending on the specifications of each device or the system specifications.

The present invention solves the above problems and aims to provide a signal switching device that does not require changes in wiring specifications regardless of system specifications.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a circuit n that outputs a desired input signal from m input terminals and m plural signals to a desired output terminal by a switching control signal. , m-n circuits that output input signals as they are, and m output terminals.

[0008]

[Operation] By using the above-mentioned means, the present invention enables the a*m input and a
*Can be easily connected to n-output signal switching equipment.

[0009]

[Embodiment] An embodiment of the present invention will be described below.

FIG. 1 shows a configuration diagram of a signal switching device according to an embodiment of the present invention, and the same components as in FIG. 2 are given the same numbers. That is, in FIG. 1, 1 is an input terminal, 2 is an m-input 1-output signal switching circuit, and 3 is an output terminal, which are the same as the configuration of the conventional example. 4 is a buffer amplifier with high input impedance.

In the case of a single device specification, a desired input signal is selected and outputted to each of the n outputs by a switching control signal of the signal switching circuit 2 having m inputs and 1 output. In the case of equipment system specifications, the input (1) is switched from the input (1) to the output (1
), input (2) to output (2), input (n) to output (
n) is selected. Inputs (n+1) to (m) are outputted to outputs (n+1) to (m) via buffer amplifiers 4, respectively. The output signal is as it is a*m input a*n
Can be connected to an output signal switching device.

According to the signal switching device of the embodiment of the present invention, the signal switching device in the device can be attached or removed, or the wiring specifications in the device need not be changed, regardless of the specifications of each device or the system specifications. Easily compatible with various specifications.

[0013]

As is clear from the above embodiments, according to the present invention, there are m input terminals, n m input/1 output signal switching circuits, and a circuit that outputs m−n input signals as they are. Since the present invention is equipped with m output terminals, it is possible to provide a signal switching device that can easily correspond to each specification without changing the specifications of the device, regardless of whether the device is a single item or a system.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a signal switching device in an embodiment of the present invention.

[Figure 2] Configuration diagram of a conventional signal switching device

[Explanation of symbols]

1 Input terminal 2 m input 1 output signal switching device 3
Output terminal 4 buffer amplifier

Claims (1)

[Claims] Claim 1: m>n comprising n circuits that output a desired signal from a plurality of m input signals to a desired output using a switching control signal, and m-n circuits that output the input signal as it is. A signal switching device with the following relationship.