JPH05314385A - Signal switching device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a signal switching device used in an automatic measurement system, etc., the number of switching selectors and connecting cables is reduced and any measuring instrument is connected to any measuring point. [Constitution] The measuring instrument selector 15 selects one of the measuring instruments 11 to 13, and the measuring point selector 16 selects one of a plurality of measuring points of the device under test 14.
By connecting the measuring instrument selector 15 and the measuring point selector 16, it is possible to measure an arbitrary measuring point of the object to be measured with an arbitrary measuring instrument.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input / output signal switching device such as an automatic measuring system.

[0002]

2. Description of the Related Art FIG. 6 is a diagram showing a conventional signal switching device. In FIG. 6, 61 to 63 are measuring instruments or signal generators, 64 is an object to be measured, and 65 to 67 are signal switching devices.

In the signal switching device configured as described above, independent signal switching devices 65 to 67 are provided to measure the measuring point and the signal input point of the device under test 64 to the measuring device or the signal generators 61 to 63, respectively. It is common practice to connect independently and perform various measurements.

[0004]

However, in the above-mentioned conventional signal switching device, since the signal systems of various measuring instruments or signal generators are independently connected to each other, a plurality of measuring instruments and signals are connected to one measuring point. When connecting the generator, it is necessary to connect the signal switching devices in parallel. Moreover, in order to connect to an arbitrary point, it is necessary to prepare a multi-channel signal switcher as many as the number of measuring instruments and signal generators. As a result, the number of connecting cables also increases and it becomes complicated. There was a problem.

The present invention solves the above-mentioned problems of the prior art, and allows an arbitrary measuring instrument and signal generator to be connected to an arbitrary measuring point of a device under test with a simple configuration having few signal switches and connecting cables. An object is to provide an excellent signal switching device.

[0006]

In order to achieve the above object, the present invention has a selector for selecting any one of a plurality of measurement points or input points of an object to be measured, and a selector for selecting the point. It is provided with a selector for selecting and outputting the output of one point to a plurality of measuring instruments or signal generators.

Further, a plurality of measuring instruments or signal generators having means for turning on / off the input / output are connected to a point selector for selecting any one of a plurality of measuring points or input points of the device under test. Is.

[0008]

Therefore, according to the present invention, one of the arbitrary measuring instruments can be selected and connected to the arbitrary measuring point of the object to be measured so that the arbitrary measuring point can be measured by the arbitrary measuring instrument.

Further, it is possible to select one of arbitrary input points of the object to be measured and input a signal to this input point from a signal generator selected from arbitrary signal generators.

[0010]

1 is a diagram showing a first embodiment of the present invention. In FIG. 1, 11 to 13 are measuring instruments, 14 is an object to be measured, 15 is a plurality of measuring instruments connected to one input end side, and one of them is selected to electrically connect to the other input end side. The measuring instrument selector to be connected, 16 is the DUT 1 on one input end side
4 is a measurement point selector that connects a plurality of measurement points 4 and selects one of them to electrically connect to the other input end side. Here, the other input end side of the measurement point selector 16 is connected to the measuring instrument selector 15. FIG. 2 is a diagram showing an internal configuration of the measurement point selector 16, which selects one of a plurality of input terminals using the relay circuits 51 to 53.

In the signal switching device configured as described above, one of the measuring instruments 11 to 13 connected thereto is selected by the measuring instrument selector 15, and further, a plurality of measuring points of the object to be measured 14 are selected. One of them is selected by the measurement point selector 16.

Therefore, according to the above embodiment, the measuring instrument selector 15 and the measuring point selector 16 can measure an arbitrary measuring point of the object 14 to be measured with an arbitrary measuring instrument.

Incidentally, the measuring instruments 11 to 13 in this embodiment.
Is replaced with a signal generator and the measurement point of the device under test 14 is used as a signal input point, whereby the measuring instrument selector 15 can be used as a signal generator selector and the measuring point selector 16 can be used as an input selector. The output of any signal generator can be input to any input point of the device under test.

FIG. 3 is a diagram showing a second embodiment of the present invention. In FIG. 3, reference numerals 21 to 23 are measuring instruments having an input on / off function, and the configuration thereof is as shown in FIG.
The measuring circuit 31 and the input on / off circuit 32 are provided. The input on / off circuit 32 turns on / off an input signal to the measuring circuit 31. A plurality of measuring instruments 21 to 23 integrate their inputs and are connected to the measurement point selector 16. In the measuring instruments 21 to 23 of this embodiment, a means for turning on / off an external input may be connected to the input section of a normal measuring instrument.

In the signal switching device configured as described above,
By connecting the measuring instruments 21 to 23 in parallel and turning on / off the measuring instrument input by the input on / off circuit 32 of each measuring instrument, an arbitrary measuring point of the DUT 14 selected by the measuring point selector 16 is changed to an arbitrary measuring instrument. Can be measured at.

As described above, according to the above-described embodiment, by providing the measuring instrument with the input ON / OFF function, it is possible to measure an arbitrary measuring point of the object to be measured with an arbitrary measuring instrument in combination with the measuring point selector. it can.

FIG. 5 is a diagram showing a signal generator having an output on / off function. The output on / off circuit 42 turns on / off the output of the signal generation circuit 41. By replacing this signal generator with the measuring instruments 21 to 23 shown in FIG. 3, the measurement point selector 16 can be used as an input point selector, and a signal from the signal generator is input to an arbitrary input point of the device under test 14. can do.

[0018]

As is apparent from the above embodiment, the present invention comprises a selector for selecting one of a plurality of measuring instruments and a selector for selecting one of a plurality of measuring points of the object to be measured. As a result, it is possible to measure an arbitrary measurement point of the object to be measured with an arbitrary measuring device with a simple configuration having few connecting lines.

It is also possible to use these selectors in a signal generator system.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a measurement point selector in the first embodiment.

FIG. 3 is a block diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a measuring instrument according to a second embodiment.

FIG. 5 is a diagram showing a configuration of a signal generator according to a second embodiment.

FIG. 6 is a block diagram showing a configuration of a conventional signal switching device.

[Explanation of symbols]

 11-13 Measuring instrument 14 Object to be measured 15 Measuring instrument selector 16 Measuring point selector

Claims (4)

[Claims] 1. A measurement point selector for selecting an arbitrary one of a plurality of measurement points of an object to be measured, and an output of the one point selected by this measurement point selector is selected and output to a plurality of measuring instruments. A signal switching device having a measuring instrument selector. 2. A signal generator selector that selects one of the outputs of a plurality of signal generators, and an input point selector that outputs the output of this signal generator selector to an arbitrary input point of the device under test. Equipped signal switching device. 3. A measuring instrument having means for turning on / off an input of a measuring circuit, a measuring point selector for selecting an arbitrary one of a plurality of measuring points of an object to be measured, and a measuring point selector selected by this measuring point selector. A signal switching device characterized in that a plurality of measuring instruments are connected to an output of one point. 4. A signal generator provided with means for turning on / off the output of a signal generating circuit, an input point selector for selecting an arbitrary input point from a plurality of signal input points of a device under test, and an input point selector of this input point selector. A signal switching device comprising a plurality of the signal generators connected to an input.