SU434576A1 - TRIGGER WITH COUNTABLE INPUT - Google Patents

Description

one

The invention relates to radio electronics and can be used in pulsed radio devices, in particular in switching circuits in conjunction with transistors.

Known trigger containing two tunnel diodes, input and storage transformers, diodes, Zener diode and / C-chain.

The purpose of the invention is to expand the functionality of the trigger.

This goal is achieved by the fact that in the device each arm contains a series-connected tunnel diode, a storage transformer winding and a resistor, the connection points of the tunnel diode and the resistor of both trigger arms are connected to different supply buses, and the connection points of the tunnel diode to the winding of the memory discharge transformer of the arms the trigger is connected to one another through a series-connected C-chain, a zener diode, a diode, and the secondary winding of the input transformer.

The drawing shows a diagram of a trigger with a counting input.

The trigger consists of two symmetrical shoulders. In each arm parallel to the tunnel diode 1 or 2 are connected in series the corresponding windings of the memory transformer 3 and the load resistor 4

or 5. The windings of the memory transformer are connected with the same ends to the tunnel diodes. A chain of resistor 6, zener diode 7, diodes 8 and the secondary winding of a matching transformer 9 is connected between the tunnel diodes. Parallel to resistor 6, a capacitor 10 is turned on. The trigger has outputs And 12. The memory transformer 3 is

memory element of the previous state of tunnel diodes and ensures the normal operation of the trigger.

Zener diode 7 and resistor G are used to establish, irrespective of the magnitude of the voltage supply voltage, the required supply voltage of the trigger excluding the state of tunnel diodes 1-1 (high voltage, diffusion branch). Diodes 8 compensate for temperature variations in the Zener diode voltage and thereby provide temperature stabilization of the trigger supply voltage. Matching transformer 9 transmits a pulse to start the trigger and coordinates the output of the source of trigger pulses with the trigger input.

The introduction of a trigger pulse through a matching transformer in series with the power supply allows it to do without

source triggering pulses

from the power source. The capacitor 10 bypasses the AC resistor 6.

In the initial state, one of the tunnel diodes is in the state "O (low voltage, tunnel branch), the second is in the state" 1 "(high voltage, diffusion branch). The direction of the magnetic flux in the memorized transformer is determined by the trigger arm, which is in the B state, "1, because in this arm the current flowing through the corresponding, memorized winding of its transformer has the greatest value.

When a trigger is applied1, its pulse, depending on its polarity and on the polarity of the windings being turned on, its transformer trigger goes into an intermediate state in which both tunnel diodes will be either in the state "O-O" (the trigger signal current is subtracted from the installation current), or in - in €) bto. diya ".1 - 1 (the signal current is added to the setting current).

The duration of the trigger pulse must be much less than the time constant of the memory transformer. In this case, during the time of action of the triggering pulse, there is no noticeable change in the magnetic flux in the memory transformer. As a result of a change in the current distribution associated with the transition of one of the tunnel diodes to a new state ("O or" 1), an emf is induced in the windings of the memory transformer. such a sign that the diodes are transferred to the state opposite to the original one, and the magnet flux of the storage transformer reverses direction. At the end of the transition process, the trigger is ready for the next triggering pulse.

Subject invention

A trigger with a counting input containing two tunnel diodes, an input and a memory transformer, a diode, a zener diode and a C-chain, characterized in that, in order to expand the functionality of the trigger, each string contains a series-connected tunnel diode, a winding of the memory transformer and a resistor The connection points of the tunnel diode and the resistor of both arms of the trigger are connected to the power supply buses of different polarities, and the connection points of the tunnel diode to the winding of the storage transformer of both banks a trigger connected to one another via a series connection / C-chain, a zener diode and a secondary winding input nsformatpra mp.

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