SU1231581A1 - Bridge ternary flip=flop - Google Patents

Abstract

The invention relates to a pulsed technique and can be used in various devices of automation, remote control and computing. The purpose of the invention is improved performance and reliability. The bridge ternary trigger contains reverse transistors I-6 and 27, inputs 7 and 8, 24 and 31 of the trigger, resistors 9, 10, 11, 16, 17, 30, 32 and 33, zener diodes 12 and 13, 18 and 19, diodes 14, 15, 20 and 21, output 22 of the trigger, direct transistors 23, 25, 28 and 29, power line 26, load 34. Improving the reliability is achieved by the fact that when the trigger is switched to a state in which all transistors are closed , at the same time, the bw currents of all four power transistors 5, 6, 23 and 25 are shunted; therefore, the charge of the internal capacitances of the zener diodes does not lead false alarms on the surface. The increase in speed is achieved by the fact that the power transistors close almost simultaneously, 1 sludge. with you

Description

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The invention relates to a pulsed technique and can be used in various devices of automation, remote control and computing.

The purpose of the invention is to increase performance and reliability.

In the drawing, the ndindialal scheme of the ternary bridge trigger is shown.

The three-way bridge trigger contains six inverse-transmissibility transistors 1-6, the emitters of which are connected to a common bus, the bases of the first and second transistors are connected respectively to the first and second inputs 7 and 8 of the trigger and through the first and second resistors 9 and 10 are connected to a common cable, the bases of the third and fourth transistors 3 and 4 are connected together and through the third resistor 11 are connected to the common bus, the collectors of the third and fourth transistors 3 and 4 are connected respectively to the bases of the fifth and sixth transistors 5 and C) as well as with anodes the first and second stabtistrons 12 and 13, the cathodes of which are connected to the collectors of the first and second transistors 1 and 2, respectively, the anodal of the first and second diodes 14 and 15, and after four fourth and fifth resistors 16 and 17 are connected respectively to the third and fourth anodes zener diodes 18 and 19 and the cathodes of the third and fourth diodes 20 and 21, the collector of the fifth transistor 5 is connected to the first output of the trigger

22, the cathode of the second and the anode of the fourth diode 15 and 21, the collector of the seventh direct-transistor transistor

23, the base of which is connected to the cathode of the third Zener diode 18, the collector of the sixth transistor b is connected to the second input 24 of the flip-flop, the cathode of the first and the anode of the third diode 14 and 20, the collector of the eighth direct-conducting transistor 25, the base of which is connected to the cathode of the fourth Zener diode 19, emitters the seventh and eighth transistors 23 and 25 are connected to the power supply bus 26, the ninth transistor of the inverse conduction 27, tenth and eleven direct wire transistors

 28 and 29, the emitter of the ninth transistor 27 through the sixth resistor 30 connected to the bases of the third and fourth transistors 3 and 4. The base of the ninth transistor 27 is connected to

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the third input 31 of the trigger and through the seventh resistor 32 is connected to the common bus, the collector of the ninth transistor 27 is connected to the bases of the tenth and eleventh transistors 28 and 29, KOTopbje through the eighth resistor 33 are connected power supply 26 and the emitters of the tenth and eleventh transistors 28 and 29 The collectors of which are connected to the bases of the seventh and eighth transistors 23 and 25, respectively, between the collectors of which the load is turned on 34.

 bridge trigger works as follows.

For normal operation of the ternary bridge trigger, it is necessary that the sum of the stabilization voltages of Zener diodes 12 and 18, as well as of the Zener diodes 13 and 19, is greater than the supply voltage, and the voltage of stabilization of each of the Zener diodes separately must be lower than the supply voltage.

When the supply voltage is turned on, all transistors are closed and there is no current in the load, because the current through the series-connected zener diodes 12 and 18, 13 and 19 cannot arise. This is the first steady state trigger.

When a positive pulse arrives at the input, a transistor 1 opens. The collector current of transistor 1 flows through resistor 16 and the zener diode 18, opens the transistor 23. The collector current of transistor 23 flows through diode 21, resistor 17 and zener diode 13, opens transistor 6. After the input pulse ends at input 7, transistor 1 closes and transistor 23 remains in the open state due to the collector current of the open transistor 6, which flows through the diode 14, resistor 16, Zener diode 18 and trans transistor 23 base. in a second stable state in which the transistors 23 and 6 open and nasyideny and transistors 5 and 25 are closed. At exit 22 high, and at exit 24 low potential). In the load 34 current flows.

If EcLsiH at input 8 receives a positive impulse, then transistor 2 opens. The potential at the cathode of Zener diode 13 decreases, and the current through it disappears, which leads to a closed

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transistor 6, and therefore to the closing of the transistor 23, since the current of its base disappears. After closing the transistor 23, a current through the Zener diode 19 appears and the 5 transistor 25 opens, the collector current of transistor 25 through diode 20, resistor 16 and zener diode 12 opens transistor 5, the collector current of transistor 5, flows through diode 15, resistor 10

17 and the Zener diode I9, keeps the transistor 25 in the open state after the end of the positive pulse at the input 8 and the closing of the transistor 2, the Trigger is switched to the third stable state in which the transistors 5 and 25 are open, and the transistors 6 and

23 are closed. The output 22 is low, and at the output 24 high potentials, B on the load 34, a current flows in the opposite direction (compared to the second stable state).

If a positive pulse arrives at the input 31, the transistor 27 opens, the emitter current of the transistor 25 27 opens the transistors 3 and 4 through the resistor 30, and the collector current of the transistor 27 opens the transistors 28 and 29. This causes the transistors 5 and 25 to close (or transistors 6 and 23, if the trigger was in the second stable state) and switching the trigger to the initial state, in which the transistors 5, b, 23 and 25 are closed and there is no current in the load 34.

As long as a positive pulse is present at the input 31 and the transistors 27, 3, 4 and 29 are open, the pulses arriving at the inputs 7 and 8 do not affect the trigger Q, i.e. input 31 has an advantage over inputs

After the end of the pulse at the input 31, the transistors 27, 3, 4, 28 and 29 are closed.

Increased reliability — the operation of a ternary bridge trigger is achieved by switching it to a state in which all transistors are closed, while JQ shunts the base currents of all four power transistors (5, 6, 23, and 25); therefore, the charge of the internal capacitors of the zenerons is not leads to spurious impulses at the outputs. The jg power transistors close almost simultaneously, so

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Formula and 3 optics

A ternary bridge trigger containing the first, second, third, quad, five, and sixth reverse-transistors, the emitters of which are connected to the common bus, the bases of the first and second transistors are connected to the first and second inputs, and through the first and second resistors are connected to common bus, the base of the third and fourth transistors through a resistor connected to a common bus, the collectors of the third and fourth transistors are connected respectively to the bases of the fifth and sixth transistors and respectively to the anodes of the first and second stabi Itrons, whose cathodes are connected respectively to the collectors of the first and second transistors, the anodes of the first and second dudes, and through the fourth and fifth resistors are connected respectively to the anodes of the third and fourth zener diodes and cathodes T1 of this and the fourth diodes, the collectors of the fifth and sixth transistors are connected respectively with the first and second outputs of the trigger and the cathodes of the second and first diodes, the anodes of the fourth and third diodes, connected respectively to the collectors of the seventh and eighth transistors direct direct capacity, the emitters of which are connected to the bus of the pitapi, and the bases are connected respectively to the cathodes of the third and fourth zener diodes, which, in order to increase the speed and reliability of operation, the ninth a reverse conduction transistor, the tenth and one direct transistor transistors, the emitters of the ninth transistor through the sixth resistor are connected to the bases of the third and fourth transistors, the base of the ninth transistor is connected to the third input and the seventh resis op is connected to the common bus, the cottage vector of the ninth transistor is connected to the bases of the tenth and eleventh transistors, and via the eighth resistor is connected to the power line and emitters of the tenth and eleventh transistors, whose collectors are connected respectively to the bases of the seventh and eighth transistors, whose collectors connected respectively to the collectors of the fifth and sixth transistors.

Claims (1)

Formula of the invention A bridge ternary trigger containing the first, second, third, fourth, fifth and sixth transistors of reverse conductivity, emitters of which are connected to a common bus, the bases of the first and second transistors are connected to the first and second inputs and through the first and second resistors are connected to a common to the bus, the bases of the third and fourth transistors are connected to the common bus through the third resistor, the collectors of the third and fourth transistors are connected respectively to the bases of the fifth and sixth transistors and, respectively, to the anodes the first and second zener diodes, the cathodes of which are connected respectively to the collectors of the first and second transistors, the anodes of the first and second diodes and through the fourth and fifth resistors are connected respectively to the anodes of the third and fourth zener diodes and the cathodes of the third and fourth diodes, the collectors of the fifth and sixth transistors are connected respectively with the first and second outputs of the trigger and the cathodes of the second and first diodes, the anodes of the fourth and third diodes are connected respectively to the collectors of the seventh and eighth direct conductivity transistors, the emitters of which are connected to the power bus, and the bases are connected respectively to the cathodes of the third and fourth zener diodes, which is necessary in order to increase the speed and reliability of operation, in addition introduced the ninth reverse transistor, the tenth and eleventh direct transistors — an advantage over the inputs after the end of the pulse at the input 31 transistors 27, 3, 4, 28 and 29 are closed. Improving the reliability of the ternary bridge trigger is achieved by switching it to a state in which all the transistor conductivity, and the emitters of the ninth transistor through the sixth resistor is connected to the bases of the third 45 and fourth transistors, the base of the ninth transistor is connected to the third input and through the seventh the resistor is connected to a common bus, the collector of the ninth transistor is connected to the base closed, the base currents of all four power transistors (5, 6, 23 and 25) are simultaneously shunted, so the charge is internal their capacitances of zener diodes does not lead to the appearance of false pulses at the outputs. Power transistors close almost at the same time, therefore, performance improves. the tenth and eleventh transistors and through the eighth resistor is connected to the power bus and emitters of the tenth and eleventh transistors, the collectors of which are connected respectively to the bases of the seventh and eighth transistors, the collectors of which are connected respectively to the collectors of the fifth and sixth transistors.