SU430511A1 - DEVICE MANAGEMENT OF TWO-PULSE DECATRONS - Google Patents

Description

one

The invention relates to control circuits of two-pulse decatrons and can be used in the development of devices containing counting and switching two-pulse glitter dekatrochki intended for frequency division and direct digital counting in the decimal number system.

Control devices for dual-pulse decatrons are known, which contain a waiting blocking generator on a transistor, in the emitter circuit of which a resistor is connected, connected to a source of bias voltage, while the first and second subcathodes of the decatron are interconnected via an integrating RC chain.

The aim of the invention is to increase the speed and decrease the level of control signals.

This is achieved by the fact that the first subcathode of the decatron is connected to the emitter of the blocking generator transistor.

FIG. 1 shows a functional diagram of the proposed device; in fig. 2 - time diagrams of voltages.

The device contains a controlled dekatron 1 with subcathode II and a shaping device 4 consisting of a standby blocking oscillator made on the transistor 5 with a resistor 6 in the emitter circuit, a blocking transformer 7 and a variable resistor 8 for adjusting the duration of the shaping pulse, and an input differentiating circuit consisting of a capacitor 9, a resistor of 10 n diode 11. The device also contains an integrating RC-chain, playing the role of a passive forming circuit and consisting of "3 capacitors 12 and a resistor 13, and the source 14 of the voltage displacement.

In the initial state, when the traisistor 5 is closed, the bias voltage of +40 v from the source 14 through the resistor 6 is fed to the sub-cathode 2, and through the resistors 6 -k 3 to the sub-cathode 3. When entering the capacitor 9

a counting voltage pulse of rectangular shape with an amplitude of at least 10 V, for example, from the ninth cathode of the preceding decatron (see Fig. 2a), the blocking generator is triggered by a negative pulse obtained after differentiating the counting pulse by a differentiating chain consisting of a capacitor .9 and resistor 10 (see Fig. 26). In the blocking generator, a relaxation process begins, with the result that

The emitter-resistor 6 forms a rectangular pulse of negative polarity with a duration of 100-150 microseconds. with an amplitude of 80 8 (see Fig. 2c), which is directly applied to the first subcathode 2 of the decatron /. In a nutshell, on the subcathode 2, the decatroia / voltage level changes abruptly from 40 to -40 b. In the second subcathode 3 of the decatron 1, due to an integrating chain consisting of a capacitor 12 and a resistor 13, a negative voltage is formed with gentle fronts (see Fig. 2d). When the potential of the first subcathode 2 of the decatron / is reduced to a level of -40 A, the transfer of the discharge from the zero cathode to the nearby electrode of the first cathode 2 begins, which reliably ignites at a relatively low potential difference between the zero cathode and the first sub-cathode 2 at the first subcathode 2. As the negative voltage on the second subcathode 3 increases, the nearby electrode of the second subcathode 3 also spans (time tz). At the moment of the completion of the relaxation process of the blocking device, the discharge in the first subcathode 2 stops and only the second subcathode 3 is lit. As the capacitor 12 is discharged by the discharge current of the decatron / voltage

the second subcathode 3 is modified. At time tz, the transfer of the discharge from the burning electrode of the second sub-cathode 3 to the first cathode begins. At time t, the discharge occurs only at the first cathode. When the next counting pulse arrives, the discharge transfer process is repeated.

Subject invention

A two-pulse dekatron control device containing a waiting blocking oscillator on the transistor in the emitter circuit

which includes a resistor connected to a bias voltage source, wherein the first and second subcathodes of the decatron are interconnected via an integrating KS chain, characterized in that

speeding up and reducing the level of control signals, the first subcathode of the decatron is connected to the emitter of the blocking generator transistor.

-t