SU668089A1 - Electronic switch - Google Patents

Description

(54) ELECTRONIC KEY

The invention relates to automation and can be used in control and switching devices. The electronic key is known, which contains an AC voltage nozzle, a resistor and a capacitor, switching n control transistors, between which a capacitor and a diode divider 1 are connected. The disadvantage of this key is low speed. Also known is an electronic switch containing two chains connected in parallel, each of which consists of an input, an intermediate and an output transistor, connected in series to the first resistor and a zener diode, and a relay coil is connected to the collector collar of the second transistor, the contact of which is connected between the emitters of the intermediate and the input transistors of the second chain, as well as two actuators (21. The disadvantage of this device is its low-, functional capabilities. In order to expand functionality in an electronic key containing two chains connected in parallel, each of which consists of an input, intermediate and output transistors connected in series to a first resistor and a zener diode, and a relay coil connected to the intermediate emitters is connected to the intermediate transistor collector second HenoJ KH and the input transistors of the second chain, as well as two actuators, entered a command generator, a clock generator and two thyristors, and one nz of the command generator outputs is connected to the stabilitron cathode via a tyrnstor, the thyristor control electrode is connected to another command generator input, the first actuator is connected to the anode junction and the first resistor, the control is connected to the other output of the first anode the electrode of the second thyristor, the anode of which through the second additional resistor is connected to the base of the input transistor of the second chain, while the collector of the specified transistor is black Without the first and second complement; diodes are connected to the collector of the input transistor of the first chain and the input of the clock generator, the output of Kofoporo through the third additional diode and the third additional resistor are connected to the intermediate collector and the base of the output transistors of the first chain respectively, the collector and the base of the output transistors respectively the second chains through the corresponding fourth and fifth additional resistors are connected to the input of the second actuator.

The drawing shows a schematic diagram of an electronic key (dashed lines indicate connection to external devices)

The proposed electronic key consists of two groups of transistor inverters. The first chain - transistors 1-3, the second chain of transistors 4-6. A start-up chain is connected to the inputs of both chains, consisting of Zener diode 7 and a resistor 8, designed to interfere with protection and limiting the level of the input signal. To: the cathode of the Zener diode 7 is connected to the cathode of the thyristor 9, the anode and the control electrode of which are connected to the command generator 10. The thyristor 9 serves as an element of the memory of the command signal.

K., the anode of the Zener diode 7 is connected to the first actuator 11. Between the resistor 8 and the base of the transistor 6 is connected a thyristor 12, also acting as a memory element of the signal coming from the device 11. The collector of the transistor 6 is connected through the connecting diodes 13, 14 to the input the clock generator 15 and the collector of the transistor 3 and the base of the transistor 2. In the first case, the generator 15 starts, in the second - the blocking of the transistor 2. The output of the generator 15 is connected between the collector of the transistor 2 and the base of the transistor 1, providing The signal is transmitted to the second actuator 16, to the input of which is connected the base of the transistor 4, intended for receiving signals from the device 16.

In the collector of transistor 6, an actuating relay 17 is connected, the contact 18 of which is connected between the plus and emitter of the transistor 6, which is turned off by the contact 18 at the moment the signal arrives from the device 16, the limiting resistors 19-23, the diode 24.

The electronic key works as follows.

In the initial state, all transistors are closed, which ensures an economical operation mode.

When a command is received from generator 10 (source), a thyristor 9 is opened, which in this case is not only a memory element. The current flowing through the thyristor 9,

ensures the operation of the Zener diode 7, its threshold of operation ensures a certain noise immunity. In addition, the executive device 11 is winched and the transistors 3, 2 and 1 of the first group are opened and the device 16 operates.

Upon receipt of the corresponding reverse command from the device I, the starting circuit 1 is turned on: and the thyristor 12, which signals this signal, also opens the transistor 6 of the second group. Upon the completion of the jcmpa 6 opening, the transistors 2, 1 are closed and the cd input signal of the device 16 is removed. At the same time, the transistor 6 is opened through the diode 13 and the generator 15 is started, the pulse signals of which open the transistor 1, enter the device 16, which A new command in the form of a pulse sequence of signals, after some time gives a response command to the transistor 4. The latter opens, turning on transistor 5, the relay 17 is activated in the collector of this transistor, I turn on its terminal 18 transistor 6, the thyristor 12, the signal is removed from the generator input 15, which leads to shutdown of the latter, and consequently to zakrgaaniyu transistor 1 and the removal of the pulse signals with the actuator 16.

In addition, the thyristor 9 is turned off by the command generator. At the same time, the device 16 removes the signal (command) from the input of transistor 4, which causes the relay 17 to turn off in the collector of transistor 5. Thus, the device is reset.

Claims (1)

Invention Formula An electronic switch containing two chains connected in parallel, each of which consists of an input, intermediate and output transistors connected in series with the first resistor and a zener diode, and a relay coil connected to the collector of the intermediate transistor of the second chain and connected between the emitters of the intermediate chain and the input transistor of the second chain , as well as two actuators, characterized by the fact that, in order to improve functionality, introduced a command generator, ticks second generator and two thyristors, one of the generator outputs komandcherez thyristor connected to the cathode of the zener diode, a control electrode of the thyristor is coupled to another input command generator, wherein the compounds to the site of the anode of the zener diode and the first resistor connected to the first IP