SU362473A1 - TRANSISTOR KEY - Google Patents

Description

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The invention relates to the field of number of cells and electrical measuring equipment and can be used to switch "secoiBbix. Resistances in a 1 transducer of the superchargers and the constant-to-a-voltage code.

A transistor key is known, containing a key that contains inversely connected transistors of the same type and a bridge and a compensation circuit for residual currents. However, such a key is distinguished by unstable power, residual voltage and significant power consumption.

The aim of the invention is to increase stability and reduce power consumption of the key. This is achieved by the fact that the residual voltage compensation circuit is designed as a keynote cascade, and a transistor whose collector is connected through a common point C01 to a common point and an inverter is turned on to a Hix transistor; the emitter is connected to a power source, and the base through another resistor is connected to the base of one of the inversely connected transistors.

In the drawing, an electric circuit of a tradable key is shown.

The key contains inversely connected transistors / and 2 types of n-p- and residual voltage compensation circuit, made in the form of a key stage on transistor 3, the emitter of which is connected to the additional power source 4. Between the collector of transistor 5 and the junction point of the emitters of transistors / and 2, a resistor 5 is inserted, which determines the compensation current, and a limiting resistor 6 is inserted in the base circuit of transistor 3.

With the code "1, the potential of the transistor 1 is applied to the baau of the transistor 1, and to the bases of the transistors 2 and 5

potential to ensure their closed status | yapie. At the same time through the transistor 1 extends almost only the current to the load.

With the code "O", the potential providing their open state is supplied to the bases of transistors .2 and 5, and the potential providing its closed state to the bases of transistor 1.

The compensation current flowing through the transistor 2, creates a voltage drop "and its

internal resistance, opposite to the 3iBaiKy voltage drop from the load current, reducing the osaggo and ignition collector-emitter of the open transistor 2. The minimum residual voltage of the transistor 1} can be obtained by choosing the magnitude of the base current, due to the residual voltage compensation This transistor is not produced.

In the feminine way, the stability of the residual voltage is higher from the current

the compensation was obtained by arranging the potential of the iBxoae 7 for the compensation current and excluding the divider resistor from the compensation circuit. A reduction in power consumption is achieved thanks to the disconnection of the current through the sensing of the transistor /, which makes it possible to lower the lead: the rank of the base current — this, the transistor.

The subject of invention

Transistor switch containing inversely (Included transistors of the same type inpoiBO-,

Capability and scheme of residual voltage collapse, characterized in that in order to increase stability and use of the key power, the circuit of residual voltage is made as a key transistor, the collector of which is connected to a common resistor through a single the point of the inversely connected transistors, the emlter is connected to an additional power source, and the base is connected via a different resistor to the base of one of the inoperative power sources; c.

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