SU1396262A2 - Delay device - Google Patents

Abstract

The invention relates to the field of pulsed technology and can be used to form highly stable time intervals in the apparatus of automation, remote control, measurement technology. The aim of the invention is to improve the accuracy of the formed time intervals. To achieve this goal, two diodes 12 and 13, which are connected in opposite way, are additionally introduced into the device. In addition, the device contains a trigger 1, the installation input of which is the device input, the time specifying the KS circuit 2 consisting of a resistor 3 and a capacitor 4, a voltage divider 5 consisting of resistors 6 and 7, a comparator 8. In parallel, the time of the master circuit 2 is connected a series circuit 9 of resistor 10 and diode 11. The length of time interval formed by the device is almost independent of the magnitude of the drop right and diodes 11-13 and is determined from the mathematical expressions set forth in the description of the invention. 1 il. and iS (L s

Description

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The device relates to a pulse technique, can be used for the formation of highly stable time intervals in the equipment of automation, telemechanics, measurement technology and is in addition to the auth, sv. No. 1205279.

The aim of the invention is to increase the accuracy of time intervals formed.

The drawing shows the electrical circuit of the delay device.

The device contains a trigger I, the voltage E, the sign of the counter

The setting input of which is 15 is false to the initial voltage U, on

a device input, the time setting the HC circuit 2, consisting of resistor 3 and capacitor 4, and the divider 5 voltage b, consisting, for example, of resistors 6 and 7. To the output time 20 m of the driving circuit 2 and the voltage divider 5 is connected to the inputs of the voltage comparator 8, the output of which is connected to the reset input of trigger 1, and the time is the driver circuit 2 and the divider 5 voltage is connected between the outputs of flip-flop 1. Parallel to the time of the master circuit 2, serial 9 is connected resistor 10 and diode 11. Between the anode of diode 11 and the top of the bridge formed ochkoy compounds time zada- guide circuit 2 and voltage divider 5, includes anti-parallel diodes 12 and 13.

The device works as follows.

In the initial state, the forward and inverse outputs of trigger I are set to O and 1, respectively. Diodes 11 and 13 with open capacitor 4 charged before the initial voltage

RV

thirty

35

40

V (u-u ,,) (u.,

where and is the voltage between the outputs of trigger 1 with circuit 9 off;

R is the resistance of the resistor 10; g is the internal resistance of trigger i in both its states;

the voltage drop across open diodes 11 and 13, respectively,

The voltage at the inverting input of the comparator, defined by divider 5, is greater than at its non-inverting input (which is 0), and the output of the comparator 8 is set to O.

and, L 3 3

at

55

condenser 4, and the last one starting to recharge.

When the voltage at the non-inverting input of the comparator 8 becomes equal to the voltage at its inverting input

(R2 / (Rl + R2). E.

comparator 8 is switched. 1 sets its trigger 1 to its initial state. This completes the duty cycle and begins the cycle of restoring the initial state, which ends when the voltage on the capacitor 4 becomes equal to the initial voltage. The value of the time interval formed by the device is determined by the expression

master circuit time 2;

45

 0

R1, R2

 - and

- Ui 5

The resistance of the resistor is 6 and 7.

Provided that we are

Uj. U

3

I o

50

T (R + r) C In

:., + - E.-)

Tm

Where

Rk

2 fin

m

lm j

From expressions (l) - (3) it can be seen that the value of the formed interval is

When the trigger pulse 1 (I) arrives at the installation input, it is set to 1 on its direct output, and 0 on the inverse, and the device begins its duty cycle. Diodes 11 and 13 are closed, and diode 12 is turned off, and a voltage is applied to circuit 2

Where

3 "E, -and,.,

voltage drop on open diode 12.

The voltage E, the sign of the opposite of the initial voltage U, on

capacitor 4, and the latter begins to recharge.

When the voltage at the non-inverting input of the comparator 8 becomes equal to the voltage at its inverting input

(R2 / (Rl + R2). E.

comparator 8 is switched. 1 sets its trigger 1 to its initial state. This completes the duty cycle and begins the cycle of restoring the initial state, which ends when the voltage on the capacitor 4 becomes equal to the initial voltage U. The value of the time interval formed by the device is determined from the expression

(one)

master circuit time 2;

five

 0

R1, R2

 - and

- Ui 5

g resistors 6 and 7.

Provided that we are

Uj. U

3

I o

BY

T (R + r) C In

:., + - E.-)

Tm

(2)

Where

Rk

2 fin

m

lm j

(3)

From expressions (l) - (3) it can be seen that the value of the formed interval is 1396262

T is almost independent of the fact that, in order to keep the exact values of the voltage drop across the diodes, two diodes are inserted into it, including the P-13.

Claims (1)

the anode of the main diode and the top of the formula of the invention the bridge formed by the point of connection common time setting NC circuit and divider No. 1205279, different voltage.