JPS59158036A - Branch switch - 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 (a) 1 Technical Field of the Invention The present invention relates to a branch switch, and particularly to a branch switch with little stray capacitance.

(BL, Prior Art and Problems No. '=, IM is an example of a branch switch according to the prior art,] In the scrap diagram, RLI to RLn are schematic diagrams of drive windings of relays waiting for two windings, respectively. In the figure, C is stray capacitance.

As shown in FIG. 1, a single drive signal was used to turn on any contact and at the same time turn off all other contacts.

In this manner, the IN terminal can be connected to any output terminal 0UTn by operating any relay.

However, although it is possible to drive n-branches using this method, there is a drawback that the impedance characteristics are poor because the stray capacitance for the signal path is different on both sides of the switch. For example, the stray capacitance on the input side is nXC, and the stray capacitance on the output side is C.

For this reason, it can be used as a switch for direct current or low frequency signals that is not affected by stray capacitance, but it is not possible to increase the number of branches n for high frequency signals. Therefore, in order to correct the influence of this stray capacitance, a coil L was inserted on the common side of the signal path using the same drive circuit as in FIG. 1, as shown in FIGS. 2 and 3.

In particular, in Figure 3, a tournament shape is used to compensate for the bus length of the signal path when there are a large number of branches, and multiple coils are inserted to increase the frequency.

However, the number n of branches that can be corrected by the circuit shown in FIG. 2 is limited, and the circuit shown in FIG. 3 has the disadvantages that the circuit is complicated and difficult to manufacture, and that the loss due to the compensation coil increases.

For this reason, when constructing a switch with a large number of branches n, a multi-branch switch was obtained by connecting switches with a small number of branches in multiple stages.

FIG. 4 shows an example of a 25-minute branch switch configuration with two stages of 5-branch switches. By doing this, it is possible to effectively reduce the stray capacitance that occurs in the signal path. In the example of FIG. 4, the stray capacitance is 12C, but in the method of FIG. 1, the stray capacitance is 26C, which is improved to less than half.

In the circuit shown in diagram 4, when trying to form the signal path of lN-0111, by passing current through Dll-El of 5SW1, contact Sll is turned on, and Dllll-El is turned on.
This is completed by passing a current through f and turning on contact 5111 of 5SWII.

When switching this signal path to lN-0121, 5SW
Turn on contact 312 of I and turn off contact S11 at the same time.
), 5SWI 217) Contact 5121 must be turned ON, and contact 5ill of 5SWI 1 must be turned OFF.

As explained above, the above method has the disadvantage that control of the drive system becomes extremely complicated.

(C)2 Purpose of the Invention The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art;
It is an object of the present invention to provide a branch switch which has little stray capacitance and whose drive system can be easily controlled.

(d) 1 Structure of the Invention According to the present invention, the above object is constructed by combining a plurality of relays each having a first winding and a second winding and which operate only when current flows additively through both windings. In the branch switch group, each of the first stirring wires of a plurality of N relays is connected in series one after another, both terminals thereof are designated as an A terminal and a B terminal, respectively, and each second stirring wire of a plurality of N relays is connected in series. A plurality of M sets of unit branch switches with one end of each winding connected in common to serve as a C terminal, and the above-mentioned M
A higher-order unit branch switch-group consisting of the M relays constituting the upper unit of the unit branch switch of the set is installed, and the B terminal of the first unit branch switch is connected to the A terminal of the second unit branch switch. Connect the B terminal of the (M-1) unit branch switch to the A terminal of the M-th unit branch switch, and then repeat this in sequence to connect the B terminal of the M-th unit branch switch to the A terminal of the M-th unit branch switch. The upper unit branch switch
The B terminal of the upper unit branch switch set is connected to the A terminal of the upper unit branch switch set, and the second relay of the first relay constituting the upper unit branch switch set is connected to the C terminal of the upper unit branch switch set. The other terminal of the winding is connected to the C terminal of the first unit branch switch, and this process is repeated one after another to connect the other terminal of the winding to the C terminal of the second winding of the M-th relay constituting the upper unit branch switch group. The terminal is connected to the C terminal of the M-th unit branch switch, and is on the opposite side of the A terminal of the M-th unit branch switch and the C terminal of the second winding of each relay constituting the M group of unit branch switches. This is achieved by providing a branch switch characterized in that a voltage is applied between the terminals.

(e) 9 Embodiments of the Invention FIG. 5 is a circuit diagram showing an embodiment of the present invention, in which all the openings are schematic diagrams of drive windings of the relay, and the signal paths are the same as in FIG. 4.

That is, one end of the drive winding of 5SWII is collected, and
It is connected to Dll, which is the drive winding of S11 of the upper branch switch 55w1 of the signal path.

One end of each of the drive 1 windings of 5SW12 to 5SW15 is combined, and the upper branch switch 5SW of 5SW12 to 5SW15 is
It is connected to the drive windings D12 to 15 of 312 to 15 of I, and further the drive windings of 5SWI are collected, connected to the opening winding of 5SWI, and then connected in series with the opening windings of 5SWII to 5SW15. .

In the circuit as described above, the drive of the switch is improved as follows.

When forming the signal path for lN-0111 as before,
By applying a voltage between Dll and 800, D1
Current flows from 1T → Dll → DO → El-EO, and contact 5
111 and contact Sll are turned ON, and the contacts S12 to S15 and 5112 to 5155 are simultaneously turned OFF.

When switching this signal path again from IN to 0121,
By passing a current between D121 and 80, contact 312
The contact 5121 is turned ON, and all other contacts are turned OFF.

5SWI and 5SW-11 to 5SW-15 themselves have few branches, so stray capacitance is small (high frequency characteristics are also good).

In other words, good multi-stage connection is possible.

Figure 6 shows another embodiment of the present invention, in which the branch switch described above is further assembled into three stages: lower, middle, and upper. It's easy to do.

(f) 8 Effects of the Invention As described in detail above, the present invention has the great effect of providing a good branch switch with less stray capacitance.

[Brief explanation of drawings]

FIG. 1 shows one embodiment of a branch switch according to the prior art. FIGS. 2, 3, and 4 all show other embodiments of a branch switch according to the prior art. FIG. 5 is a circuit diagram showing one embodiment of the present invention. FIG. 6 is a circuit diagram showing another embodiment of the present invention. Things / 2nd eup 3rd 4m

Claims (1)

[Scope of Claims] In a branch switch group configured by combining a plurality of relays each having a second winding and a second winding and operating only when current flows additively through both of the two twisted wires, a plurality of N The first windings of the plurality of relays are connected in series one after another, and both terminals thereof are designated as the A terminal and B terminal, respectively, and one end of each of the second story wires of the plurality of relays are all connected in common. A plurality of M sets of unit branch switches each having a C terminal, and a higher unit branch switch set consisting of M relays constituting a higher rank of the M sets of unit branch switches are installed, and the first unit branch switch Connect the B terminal of the unit branch switch to the A terminal of the second unit branch switch, repeat this in sequence, and connect the B terminal of the [M-1] unit branch switch to the A terminal of the M-th unit branch switch. Further, the B terminal of the M-th unit branch switch is connected to the A terminal of the upper unit branch switch group, and the B terminal of the upper unit branch switch group is connected to the C terminal of the upper unit branch switch group. The other terminal of the second floor wire of the first relay constituting the upper unit branch switch set is connected to the C terminal of the first unit branch switch, and the comparison is repeated sequentially, The terminal opposite to the C terminal of the second winding of the M-th relay constituting the unit branch switch-group is connected to the C terminal of the M-th unit branch switch, and the A terminal of the M-th unit branch switch; A branch switch characterized in that a voltage is applied between a terminal on the opposite side of a C terminal of a second winding of each relay constituting the M sets of unit branch switches.