SU78878A1 - Electronic switch - Google Patents

Description

An electronic switch (multi-electron tube) is proposed for switching communication channels, for example, in pulsed multi-channel radio links.

Electronic switches that use a saw-tooth moving electrostatic field twice to alternately unlock (and lock) communication channels are known. In such switches, the efficiency of using the cathode current relative to the bottom.

In the described switch, this disadvantage is eliminated by securing the cathode and the second control grid. In addition, the described switchboard makes it possible to determine the duty cycle of pmpulses by means of a variable resistor, P1, connected in series with the second control grid.

The design of the switch cathode of the image on the fpg. one; The second control grid is shown in FIG. 2; the anode structure in fig. 3; The switch on circuit is shown in phpg. four.

As the base of the cathode ipolzuet the nickel wire /, on which wind the heater 2, covered with an alundum mass 3. The core of the cathode are nickel cylinders 4, connected to the sections of the heater that have equal resistance. The number of cylinders is equal to the number of channels.

The first control and ecrag1a grids of the switch do not differ in their construction from the analog-grid grids in the pentodes.

The second control grid (Fig. 2) provides a separate section of separate sections 5 mounted on nickel cylinders 6. Attach the cable:) those are on glass rods 7 and are divided among themselves by muftam 8 coated with a thin layer of platinum. Cylinders 6 are connected with a layer of platinum so that the resistances between adjacent grids are the same.

The switch's anode (Fig. 3) consists of insulated cylinders with separate leads. I have the number of cylinders 9 of the anode and sections 5: the network must be different from the number of communication channels that the switch is designed to switch to.

 78878-2. The first cathode section of the electronic switch is connected to the positive, and the first control grid is 10-to the minus of the source 11 of the blocking bias voltage (FIG. 4). The potential of the control grid with respect to the remaining sections of the cathode will gradually decrease due to the voltage drop on the heater powered by the battery 12.

A sawtooth voltage generator 13 is connected between the first grid and the cathode. As the voltage supplied from the generator 13 increases, current will alternately occur in the circuits of the switch cathodes, which is equivalent to the sequential supply of the signals supplied to the clamp 14 to the communication channels 15.

Channel deactivation is achieved using the second control grid of the switch, consisting of sections 5.

The second control grid supplies the potential, negative relative to the cathodes, from the bias source 11 and the sawtooth voltage from the generator 13. The voltages supplied from the generator 13 to the first and second control grids should be in antiphase. The sawtooth applied to the second control grid will alternately disconnect the channels 15 from the clamp 14.

To smoothly adjust the channel operation time and, consequently, the duty cycle, a variable resistance 16 is connected in series with the second control switch grid.

Subject invention

Claims (2)

1. Electronic switch, twice using a moving electrostatic field; once for unlocking, another for locking communication channels, characterized in that, for the purpose of greater efficiency of using the cathode current, the cathode and the second control grid are made sectioned. 2. The electronic switch according to claim 1, characterized in that, in order to control the duty cycle, a variable resistance is connected in series with the second control grid.