SU432559A1 - DEVICE FOR INDICATION - Google Patents

Description

This invention relates to the field of electrical engineering. The device can be used to monitor the correct passage of short duration signals.

A display device containing memory cells made on thyristors, the anodes of which are connected to a positive power supply bus, control electrodes through a diode, a resistor and a matching transformer to the input plugs, and a blanking unit made on two matching transformers, is known thyristor, resistors, diodes and transistor. The base of the latter is connected through a resistor and the first matching transformer with a negative power bus, input terminals and a cathode of the thyristor, the anode of which is connected to the positive power bus through a damping element and series-connected resistors and a capacitor. The emitter of the transistor, the cathode of the thyristor and the second matching transformer are connected to the negative power bus, the control electrode of the thyristor through a diode, the resistor and the second matching transformer to the input busbars. However, such a device is applicable to simultaneously display no more than one signal at the input.

In order to expand the field of application, a key on resistors, a zener diode and a transistor, whose collector is connected to the cathodes of the tirpstors of the memory cells, is inserted into the device, the base through the first resistor to the positive bus p of the quenching unit, the emitter through the stabilitron to the positive power bus, and through the second resistor to the positive power bus.

The drawing shows a diagram of the proposed device.

The device contains memory cells / made on tirpstor 2, indicator lamps 3 connected to the positive bus 4 pits, dpod 5, resistors 6 and matching transformers 7, the input windings 8 are connected to the primary windings. Block 9 is extinguished on matching transformers W p It, the primary windings of which are connected to the input buses 12 and 13, respectively, thyristor 14, connected by a cathode with a spindle, power supply 15, resistors 16-19, diode 20, performing the function of a damping element, diode 21, capacitor 22 n trans to the resistor 23. The key 24 is made on rezstor 25 and 26, zener diode 27 and the transistor 28.

Signals enter the memory cells through the input buses 8 (in any sequence or simultaneously) and through transformers 7 and diodes 5 arrive at the control electrodes of thyristors 2. Shunt resistors are connected in parallel to the control electrode and the cathode of the thyristors 2 6. Prp this thyristors 2, on the control electrodes of which the signal came, turn on indicator lamps 3.

The memory cells are powered through an electronic switch 24, made on a transistor 28, in the base circuit of which the resistor 25 limits the base current, and the emitter is connected to the supply buses 4 and 15 via a bias chain from the zener diode 27 in the diode and the resistor 26, and the zener diode 27 simultaneously stabilizes the current through the emitter of the transistor 28. The mode of the transistor 28 is selected such that in the normal state it is open and is in saturation. This ensures stable operation of the device.

When a reset command is applied to the input bus 12, the supervisory trapistor 23 of the block 9 is quenched through the transformer 10 and the resistor 16. The transistor 28 locks and the voltage on the collector disappears, resulting in de-energization of the thyristor cathodes 2 memory cells and indicator lights go out .

The duration of the reset signal on the bus 12 must exceed the maximum turn-off time of the thyristors 2.

If it is necessary to produce thyristors 2 from a signal of a shorter duration, this signal is fed to the input bus 13. Through this transformer // and diode 21, the signal is fed to the control electrode of the thyristor 14, which is bridged by a resistor 19 to increase 1 fault tolerance. TypiiCTop 14 is turned on and through the resistor 18 charges the capacitor 22, generating a signal of duration longer than the quench time.

thyristors 2. The generated signal through transformer 10 zaps transistor 23, turning off transistor 28 and thyristors 2, as described above. As soon as capacitor 22 is charged, thyristor 14 is turned off and capacitor 22 is discharged through resistor 17. Diode 20 performs damping of reverse emission when the thyristor is turned off 14.

Subject invention

A display device containing memory cells made on thyristors, the anodes of which through indicator lights

connected to a positive power supply bus, control electrodes through a diode, resistor 1 matching transformer to input buses, a quenching unit made on two matching transformers, a thyristor, resistors, diodes and a transistor, the base of which is connected through a resistor and the first matching transformer with a negative I1 power supply, input shiyami and the cathode of the thyristor, the anode of which through a damping element and series-connected resistors and a capacitor connected to the positive power bus, emitter transistor, cat one thyristor and the second matched transformer are connected to the negative bus

the power supply, the wiring electrode of the thyristor through the diode, the resistor and the second matching transformer - to the input buses, characterized in that, in order to expand its field of application, a key, made on resistors, is inserted in the Zener diode and the transistor, the collector of which is connected to the thyristor cathodes memory cells, the base is via the first resistor to the positive power line and to the collector of the block transistor

quenching, emitter - through the Zener diode to the negative power bus, and through the second resistor to the field power bus.