SU515256A1 - Trigger device - Google Patents

Description

one

The invention relates to radio engineering and to be used in pulse devices.

It is known that a trigger device on transistors of the same type of conductivity, containing two more transistors connected in accordance with a common emitter circuit, the base of the first transistor connected to the input source, and the base of the second transistor connected to the collector of the first transistor G l .

The aim of the invention is to increase the stability and internal resistance of the input source.

For this purpose, an additional transistor is included in the proposed trigger yciv connection, connected in accordance with a common base circuit, the collector of which is connected to the base of the first transistor, and the emitter is connected to the collector of the second transistor.

Such a trigger device has minimal residual stress, greater stability when operating from a generator with a large internal resistance, while simultaneously increasing its load capacity.

The drawing shows the electrical circuit of the release device.

The release device contains transistors 1 and 2 of the same type of conductivity, connected according to the scheme with a common emitter. The base of the transistor 1 is connected to the source 3 of the input signal, and the base of transistor 2 is connected to the collector of the transistor 1.

Additional transistor 4 is connected according to the scheme with a common base. The collector of transistor 4 is connected to the base of transistor 1, and the emitter is connected through resistor 5 to the collector of transistor 2.

When the input current is equal to zero, the transistor 1 is locked, and the transistor 2 is saturated, and the output 6 potential is close to zero. Through the emitter of transistor 4 current flows.

The device will work when the transistor 2 begins to go out of saturation. This increases the output voltage and decreases the emitter current of transistor 4, i.e. the regenerative process develops.

3

After operation, the potential at output 6 is close to the potential of source 7 due to the saturation of transistor 1 and the transition of transistor 2 to cutoffs. Transistor 4 depending on the size of the resistor 5

may remain in the active region or go to the cutoff mode. If transistor 4 remains in the active region after operation, it will be released immediately after the input current reaches a value at which transistor 2 starts to open, as a result of which the output voltage and feedback current flowing through the resistor begin to decrease. 5, which causes a regenerative process.

The maximum possible load power in this device is determined by such a value of resistor 8, at which transistor 2, after regeneration, is on the verge of cutoff and saturation.

The source of the input current of the trigger can be a source with any internal: resistance, including the current generator. Known device not

four

This source can work with a large internal resistance,

Claims (1)

Invention Formula A triggering device on transistors of the same type of conductivity, containing two transistors connected in accordance with a common emitter circuit, the base of the first transistor connected to the input source, and the base of the second transistor connected to the collector of the first transistor, enhancing the stability and internal resistance of the input source, an additional transistor connected in a common base circuit, the collector of which is connected to the base of the first transistor, is inserted into the trigger device, and the emitter is connected via a resistor to the collector of the second transis-ora. Sources of information taken into account in one prior examination: 1, USSR Copyright Certificate No. 197686, Priority 2Ou Jun 1966 7 -L + eight