JPS5910614B2 - How to configure a matrix selection circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of configuring a matrix selection circuit that selects crosspoints by specifying rows and columns.

Matrix selection circuits have the advantage of minimizing the number of drive circuits when one of n circuits is selected and driven, and are therefore used in various devices including telephone exchanges.

Figures 1 and 2 show a block diagram of a matrix selection circuit and a specific circuit configuration diagram of a part of the circuit. Reveal your shortcomings.

The matrix selection circuit, whose configuration is shown in FIG. 1, performs row selection manually.

- Row designation drive circuit YDVk corresponding to any one of Y7
Specify one row in the crosspoint circuit group XP through the column selection manual X.

-Column designation drive circuit XDVk supported by any one of X7
By specifying one column in the cross-point circuit group XP through the drive, only one cross-point circuit in the cross-point circuit group XP is selectively driven.

For example, when the selection inputs Yo and Yo are selected, this selection drive is performed as shown in FIG.
2 becomes conductive, power supply V - resistor R-} transistor Q1-
Diode D - Primary winding of transformer T - Transistor Q
A drive current flows through the 2-ground path, a voltage is induced in the secondary winding of the transformer T, and the circuit connected to this secondary winding is operated.

The matrix selection circuit described above has conventionally been mounted on an electronic package, and from the physical dimensions of one electronic package, the row designation drive circuit YDV, the column designation drive circuit XDV,
3 corresponding to the 3 functional blocks of each cross-point circuit group XP
It consists of different electronic packages.

But in this way Mato? If a TUX selection circuit is constructed, the number of types of electronic packages will increase unnecessarily, which is uneconomical.

An object of the present invention is to use only one type of electronic package that constitutes a matrix selection circuit, and to economically configure a matrix selection circuit by connecting a plurality of electronic packages of the same type.

For this purpose, the present invention configures only one type of electronic package in a state in which only one of the row designation drive circuit and the column designation drive circuit required for the configuration of the matrix selection circuit is missing. The present invention is characterized in that the output line of a drive circuit in an electronic package in a shortage state is connected in duplicate to a designated line in which a drive circuit in another electronic package of the same configuration is in a shortage state.

The present invention will be explained below with reference to FIGS. 3 and 4.

FIG. 3 shows a block diagram of one example of a matrix selection circuit constructed according to the present invention.

In this figure, PKGA and PKGB are electronic packages with the same configuration, and each has four row designation drive circuits YDV,
Four column designation drive circuits XDV and 32 cross-point circuits are implemented.

A to A6 and B1 to B6 are electronic packages PKG respectively.
A, PKGB terminal.

Here, line designation selection input Y is input to terminals A1 to A4 and B to B4.
o~Y7, and terminals A5~A (3*B5~
While connecting column designation selection input Xo-X7 to B8,
By connecting terminals A9 to A16 and B9 to B16 as shown in the diagram, electronic packages of the same type PKGA,
A matrix selection circuit can be constructed using PKGB.

FIG. 3 shows an example in which an 8.times.8 matrix selection circuit is constructed from two electronic packages PKGA and PKGB of the same type.

However, if the number of circuits mounted per package is small due to the physical size of the electronic package, for example, the fourth
As shown in the figure, it is also possible to use four electronic packages PKGCe, in which the number of circuits mounted per package is one half of that of the electronic package PKGA.

Furthermore, although the description has been made with a matrix size of 8×8, it is clear that the present invention can be practiced with matrix sizes other than 8×8.

As described above, according to the present invention, a matrix selection circuit can be easily constructed by connecting a plurality of electronic packages of the same type, and it is economical because only one type of electronic package is required.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a general matrix selection circuit, FIG. 2 is a specific circuit block diagram of a part of the matrix selection circuit of FIG. 1, and FIG. 3 is a matrix selection circuit constructed according to the present invention. FIG. 4 is a block diagram of an example of the circuit, and FIG. 4 is a block diagram of another example of an electronic package constituting the matrix selection circuit of FIG. YDV...Row designation drive circuit, XDV...
・Column specification drive circuit, PKGA-PKGC...Electronic package. =63-

Claims (1)

[Claims] 1. In a method for configuring a matrix selection circuit configured to selectively drive only one of a plurality of crosspoint circuits by driving a row designation drive circuit and a column designation drive circuit, the matrix selection circuit comprises a plurality of unit electronic packages with the same configuration are configured in such a way that only one copy of either the row designation or column designation drive circuit is missing, and the missing row designation or column designation drive circuit on the package is A method for configuring a matrix selection circuit, characterized in that an output line is connected in duplicate to a designated line to which a row designated or column designated drive circuit on another unit electronic package is not connected.