SU1750027A1 - Univibrator - Google Patents

Abstract

Usage: in the devices of automation, computing, radar. SUMMARY OF THE INVENTION: the one-shot contains a control and start-up unit, a key register, a time forming chain, into which a device for changing the pulse duration is inserted, which allows changing the duration of the pulses generated on the output tires by the same amount, s.p. f-ly, 3 ill.

Description

The invention relates to a pulse technique and can be used in devices for automation, computing, radar, for example, as healthy pulse shapers.

A one-shot is known, which contains an RS-trigger, a time specifying a chain, and an NAND element.

A disadvantage of the known “mrctor” detector is the impossibility of a discrete change in the duration of the impulse being formed without reconfiguration.

Closest to the proposed technical essence and the achieved result is a one-shot containing a control and start-up unit, a key register and a time forming chain.

The disadvantage of this one-shot is low functionality, namely the lack of possibility to change the different durations of the generated pulses by the same amount. This is due to the fact that the relationship between the nominal time of the master clock and the duration of the pulses is not proportional, and with different nominal values the time of the resistors this disproportionality changes.

In addition, in the well-known one-shot at different thresholds and response times of the memory register and the OR-NOT element included in the control and triggering, the starting time of the forming chain without triggering the key register can occur.

The need for careful selection of thresholds and response times also reduces the functionality of the known odvovibrator.

The goal is to expand the field of application by ensuring that different durations of the generated pulses are changed by the same amount.

The goal is achieved by introducing a change in the pulse duration into the monovibrator device, which makes it possible to change the duration of all x pulses and the same value by changing the signal delay time by an element that is

WITH

x | ate about

yu 41

extends the range of application of the single vibrator.

In addition, the inclusion of the element OR-b after register 5 eliminates the need for careful selection of the threshold and response time of these two elements, which also expands the scope.

FIG. 1 shows a one-shot circuit; in fig. 2 is a memory register circuit; Fig, 3 is a diagram of the element adjustable delay.

The single-oscillator contains a control and start-up unit 1, a key register 2, a time forming chain 3, a device 4 for changing the pulse duration, while the address input of the control and start-up unit 1 is connected to the Yudno-vibrator input bus, 1st (I 1.2.) the information output of the control and start unit is the corresponding output of the one-shot and is connected to the corresponding input of the key register 2, the output of which is connected to the second input; time of the forming chain 3, the output of which is connected to the input of the device 4; The first and second outputs of which are the corresponding general outputs of the one-shot. and the third output is connected to the installation input of the control unit and the start-up output -which is connected to the first input of the load-forming chain 3

The control and start-up unit t contains a memory register 5, the element OR NOT, while the address input of unit 1 is connected to the corresponding input of the memory register 5. The 1st output of which is the corresponding information output of block 1 and is connected to. the corresponding input of the element OR-NOT 6, the output of which is the triggering output of the control and starting unit 1, the setup input of the unit 1 is connected to the corresponding input of the memory register 5.

Key register 2 contains keys 7, the control input of each of which is connected to the corresponding input of register 2. The power input of each key 7 is connected to the common power supply bus, the outputs of keys 7 are combined and are the output of key register 2. Each of the keys 7 contains for example, the limiting 8 and the time specifying 9 resistors, the transistor 10, while the control input of the switch 7 is connected to one end of the resistor 8, the other end of which is connected to the base of the transistor 10, the emitter of which is connected to one end of the resistor 9. and the collector The power supply input of the key 7. The second end of the resistor 9 is the output of the key 7. The forming chain 3 contains, for example, element 11 2И-НЕ 11, capacitor 12. diode 13, inverter 14, while the first input of the forming chain 3 is connected to the first input element 2I-NOT 11. the output of which is connected to the first plate of the capacitor 12. the second facing

0 which is connected to the second input by the time of the forming chain 3, to the input of the inverter 14 and through the diode 13 to the common bus of the power source. The output of the inverter 14 is the output of the forming time of the kidney center 3 and is connected to the second input of the element 2I-HE 11.

The device 4 changes the pulse duration contains a trigger 15. element 2 and 16, an element of adjustable delay, with

0 this input of the device 4 is connected to the first input of the trigger 15 and to the second input of the element 2I 16, the output of which is connected to the input of the adjustable delay element 17, the output of the adjustable delay element 17 is the third output of the device 4 and connected to the second (setting) trigger input 15, a single output of which is connected to the first input of the element 2I 16 and is the first output of the device 4, the zero left output of the trigger 15 is the second output of the device 4 changing the pulse duration.

Memory register 5 contains, for example, flip-flops 18, the first inputs of which are 5 with address inputs of the register 5, and the second inputs are connected and are the setup input of register 5. The outputs of the flip-flops 18 are the corresponding outputs of register 5.

0 The element 17 of the adjustable signal delay comprises a diode 19. a time setting resistor 20, a capacitor 21. an inverter 22. wherein the anode of the diode 19 is connected to the input of the inverter 22 and to the first ends of the resistor

5 20 and the capacitor 21, the second end of the resistor 20 is connected to a power source, the second end of the capacitor 21 is connected to a common power supply bus, the output of the inverter 22 is the output of the element 17

0 adjustable signal delay.

The single vibrator works as follows. ,

In the initial state, all channels of the input bus of the single vibrator have signals T. At the single output of the trigger 15 and at the outputs of the triggers 18 (i.e., at the outputs of the register 5) are signals O, at the output of the element OR NOT HE 6 (i.e., at the trigger output of the control and start block 1) signal G, at the inverse output of the trigger 15 and at the output of the adjustable delay element 17 (i.e., at the third output of the device 4) signal 1, at the output of the element AND 11 NO Oh, capacitors 12 and 21 are discharged, at the outputs of inverters 14 and 22 - signal 1.

When a short-time signal O is fed to one of the channels of the output bus, the corresponding trigger 18 overturns, from the corresponding output of the register 5, i.e. Signal 1 appears at the corresponding output of the one-shot and signal O disappears, while at the same time the signal O appears at the output of the element OR-NOT 6 (i.e., at the starting output of block 1).

When signal 1 at one of the outputs of register 5 (i.e. at one of the information outputs of block 1), the transistor 10 of the corresponding key 7 of the key register 2 is turned on (open) and the time of the setting resistor 9 of the corresponding key is connected to the second input 7

At the signal O, at the starting output of block 1 (i.e., at the first input the time of the forming chain 3) the signal 1 appears at the output of the Y-HE 11 element, while the capacitor 12 is charged from the power source through the output collector resistor of the AND- element NOT 11, and then - the time setting resistor 9, the open transistor 10, the switch 7, the common power supply bus, while the output of the inverter 14 is a signal O, with the appearance of which (i.e., chain 3) the trigger 15 of the device 4 is switched on its single output (i.e., on the first common The output of the one-shot) signal 1 appears, and at the zero output of the trigger 15 (i.e., the second common output of the one-shot) signal O.

As the capacitor 12 charges, the voltage at the input of the inverter 14 drops and when the operating threshold of the inverter 14 reaches its output, a signal 1 appears. At the output of the element 16, a signal 1 appears, and after a time Tm at the output of the adjustable delay element 17 (i.e., at the third output of the device 4) an O signal appears. In this case, the trigger 15 of the device 4 and the triggers 18 of the register 5 of the memory and all the rest of the circuit elements are reset. When a signal O is applied to any other channel of the input bus, the operation of the single vibrator is similar to that described with the only difference that another switch 7 is connected. Having in its composition an adapter resistor 9 of the corresponding nominal value.

Element 17 adjustable delay works as follows.

When the signal O on the input element 17, the diode 19 is open, the signal O on the input of the inverter 22, the signal 1 is output and on output. When the signal 1 is applied to the input of the element 17, the diode 19 is closed and a capacitor 21 is charged through a resistor 20 When the voltage across the capacitor 21 is reached, the threshold value of the inverter 22 triggers a signal O at the output of the inverter 22.

Thus, the extended one-vibrator produces pulses, for which duration is determined by the formula

Gt + G17,

where t is the duration defined by the l-channel number of the input bus (I 1,2, ...), which receives the signal O and the nominal value of the resistor 9 of the corresponding key 7 register 2;

A7 duration, determined by the element 17 of the adjustable delay, is established on the basis of the requirements of devices that use the signals of this one-vibrator 0 G | 7. Where T 17 is pre-MEXI, the signal is delayed by element 17

delays determined during adjustment of the one-shot,

All circuit elements can be implemented on commercially available K511 series chips.

Claims (2)

Invention Formula 1 A single-vibration device containing a control and start unit, a key register, a time forming chain, and the address input of the control and start unit connected to the input bus of the one-shot, the 1st (1 1.2 ,,., N) information output of the control and starting unit is connected to the corresponding input of the key register and is the corresponding output of the single-coder; the output of the key register is connected to the master input of the time the chain that triggers the output of the control and start-up block — with the trigger input, the forming time, and the control and zgpusk block contains the memory register, the YLI-NE element, the 1st memory register output is the corresponding information output of the control and trigger unit, the address and The setup inputs of which are connected with respectively to the memory register inputs of the same name, characterized in that, in order to expand the scope by providing a change in the duration of the generated pulses by the same value, a device for changing the pulse duration is additionally introduced into it, and the output time is formed A tangling chain is connected to the input of a device for varying the pulse duration, the first and second ports of which are the corresponding common outputs of the one-oscillator, and the third output of the device The change in the pulse duration is connected to the setup input of the control and start unit, and in the control and start unit the outputs of the memory register are connected to the inputs of the OR-NOT element, the output of which is the starting output of the control and start unit. 2. Single Vibrator p. 1, characterized with the fact. that the device for changing the pulse duration contains a trigger element And and an element of adjustable signal delay, while the input of the device for changing the pulse duration is connected to the first input of the trigger and to the second input of the element 2I, the output of which is connected to the input element of the adjustable signal delay, the single output of the trigger is the first output of the time varying device and is connected to the first input of the element 2I, the zero output of the trigger is the second output of the device for varying the duration of the pulse, the output of the adjustable delay element of the signal is connected to the second input of the trigger and is the third output of the device for changing the pulse duration 3 The one-vibrator in accordance with claim 2, is designed so that the element of the adjustable delay signal contains a diode, the time of the supply resistor, capacitor, inverter, and the input of the element of the adjustable delay signal is connected to the anode of the diode The cathode of which is connected to the input of the inverter and to the first terminals of the time of the setting resistor and capacitor, the second terminal of the capacitor is connected to the common power supply bus, the second terminal of the time of the setting resistor is connected to the power supply, and the output of the inverter is the output of the adjustable delay element but foiff Exit # another vmp & -3 PM / Tl // // liF W /// .З