SU429551A1 - DEVICE FOR THE FORMATION OF DC BINARY SIGNALS - Google Patents

Description

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The invention relates to communication technology.

The known device for generating binary DC signals, comprising a triode-inverter and an output trigger, has low sensitivity and low stability in bipolar operation.

The purpose of the invention is to increase the sensitivity and stability during bipolar operation.

This is achieved by the fact that the load of the tri-inverter is made in the form of two four-winding transformers, the control secondary windings of which are connected in series and shunted by diodes and capacitors connected in series, the connection points of which through resistors are connected to one input of the device, and the middle connection point of the windings to another input, wherein each output winding of one transformer is serially connected to the compensation winding of another transformer; at the same time, compensation windings are connected in opposite way to the output and are connected via diodes to the inputs of the output trigger, to the zero point of which 1 are connected the ends of the output windings.

The drawing shows a circuit diagram of the proposed device.

The device consists of a triode inverter 1, designed to amplify the clock pulses applied to input 2; two four-winding transformers 3 and 4, equipped with primary windings 5 and 6, connected in series with resistors 7 and 8, secondary control windings 9, 10, which together with diodes 11, 12 and capacitors 13, 14 are intended for

switching the clock pulses to the inputs of the output trigger 15; output windings 16, 17 and compensation windings 18, 19, designed to avoid false triggering of the output trigger 15

when the input signal level is lower than the device response threshold; diodes 20, 21 intended to eliminate reverse polarity pulses at the inputs of the trigger 15; resistors 22-28 intended to match the device with the source of information and set the trigger threshold.

Consider the principle of the device in a bipolar mode of operation.

With the arrival of the positive pole of the premise at contact 29, and the negative at contact 30, electric current flows through the diode 12 and the control winding 10 of the transformer 4. The diode 12 opens, and the clock pulses present on the control

the winding 10 is short-circuited through the capacitor 14. This results in almost complete elimination of the pulses on the control winding 10.

At the output of diode 21, the impulses will be absent. At this time, the diode 11 is closed, and the output of the diode 20 will have clock pulses that will set the output trigger 15 to a certain steady state.

With the arrival of the negative pole of the parcel at contact 29, and the positive pole at contact 30, diode 11 will open, and the clock pulses will be present at the output of diode 21, and trigger 15 will switch to another steady state. In the absence of a control signal, clock pulses are present on all windings of transformers 3 and 4, but counter-switching of compensation windings 18, 19 on output windings 16, 17 excludes the appearance of pulses on the outputs of diodes 20, 21, and therefore eliminates false triggering of trigger 15.

In the single-pole mode of the device, a reference voltage is applied to the contacts 31, 32. Depending on the polarity of the connection of this voltage, one of the diodes 11, 12 is open, and the output trigger 15 is set to one of the stable states, thereby fixing the receiving of the current-free package. With the advent of the current parcel to the contacts 32, 33, the current created by the reference voltage is compensated and another of the diodes 11, 12 opens, and the output trigger

15 goes into another steady state, fixing the reception of the current parcel.

The ratio of resistors 24-27 determines the response threshold of the device in single-pole operation.

Subject invention

Claims (2)

1. A device for generating binary DC signals with galvanic isolation between the power source and the control circuit, which contains a triode-inverter with a resistor-transformer load connected through additional windings to the output trigger, characterized in that, in order to increase the sensitivity, the load the triode inverter is made in the form of two four-winding transformers, the control secondary windings of which are connected in series and shunted by the connected in series diodes and cond The switches, the connection points of which are connected via resistors to one input of the device, and the middle connection point of the windings to another input. 2. The device according to claim 1, characterized in that, in order to increase stability in bipolar operation, each output winding of one transformer is connected in series with the compensation winding of another transformer, and the compensation windings are connected to the output side and connected through the diodes to the trigger inputs, the zero point of which is connected to the ends of the output windings. j shig aatz: Ma-jMLL.j dad lshdeg: dg -. .n TiTnFPiSiiiizvTSi / 4 - V rN / - / "V J3 29 30 I-I ё01L one